Monday

September 26, 2016
Number of results: 24,839

**maths**

A car completes a trip in 20 minutes. for the first half of the trip the speed of the car was 100km/h and the speed for the second half of the trip was 90km/h. How far did the car travel (in km) if the distance for the first part is the same as the second part

*April 14, 2016 by lala*

**Math**

Mr Thomas took 2hr to drive from Tokyo to Osaka.He then took another 4hr to complete the remaining 2/3 of the journey to Fukushima.His average speed for the 210km long journey was 35km/h. 1. If he reached Osaka at 12:30,at what time did Mr Thomas arrive at Fukushima? 2. What ...

*March 27, 2012 by Kimi*

**Physics**

A model rocket rises with constant acceleration to a height of 3.1 m, at which point its speed is 26.0 m/s. A.) How much time does it take for the rocket to reach this height? B.) What was the magnitude of the rocket's acceleration? C.) Find the height of the rocket 0.15 s ...

*September 14, 2015 by Amanda*

**Mechanics (M1) A level?**

A block moves on a rough slope of length 10 m inclined at 30 degrees to the horizontal. The coefficiebt of friction between the block and the slope is 0.4. The block starts from rest at the top of the slope. a) Find the speed at which the block reaches the bottom of the slope...

*April 29, 2012 by Jat*

**science**

A runner whose mass is 49 kg accelerates from a stop to a speed of 6 m/s in 3 seconds. (A good sprinter can run 100 meters in about 10 seconds, with an average speed of 10 m/s.) (a) What is the average horizontal component of the force that the ground exerts on the runner's ...

*July 17, 2014 by samantha*

**Physics**

A proton, moving with a velocity of vi, collides elastically with another proton that is initially at rest. Assuming that after the collision the speed of the initially moving proton is 2.90 times the speed of the proton initially at rest, find the following. (a) the speed of ...

*November 8, 2015 by PersonWhoNeedsHelp*

**science(velocity&speed)**

these are the only 2 questions i dont get: -how long would it take for a car to travel a distance of 200 km if it is travaling at a velocity of 55 km/hr? is the answer 4hrs and 3 min.? -an an carries food at a speed of 1 cm/s.how long will it take the ant to carry a cookie ...

*January 18, 2011 by please i need help!!!*

**PHY**

Eris, the largest dwarf planet known in the Solar System, has a radius R = 1200 km and an acceleration due to gravity on its surface of magnitude g = 0.77 m/s2. (a) Use these numbers to calculate the escape speed from the surface of Eris. 1360 m/s correct answer. (b) If an ...

*July 5, 2012 by abc*

**Physics**

A hockey player is standing on his skates on a frozen pond when an opposing player, moving with a uniform speed of 2.0 m/s, skates by with the puck. After 2.00 s, the first player makes up his mind to chase his opponent. If he accelerates uniformly at 0.10 m/s2, determine each...

*September 11, 2013 by <3*

**GEN MATH**

Solve the ff. problems below. Show your complete solution: 1.) A number added to four times its reciprocal is equal to the sum of 3/2 and the quotient of two or more than three times the same number and four. 2.) A car travelled the first 240 kilometers at a certain speed and ...

*July 31, 2016 by lab*

**Physics**

A 275-gram ball bounces off a wall. The ball stays in a horizontal plane throughout the motion. The ball strikes the wall with a speed of 4.50 m/s at an angle of 𝜃 = 35.0o relative to the wall and rebounds with the same speed at the same angle. If the ball is in ...

*May 27, 2014 by Tim*

**physics**

A bullet is fired through a wooden board with a thickness of 10.0 cm. The bullet hits the board perpendicular to it, and with a speed of +390 m/s. The bullet then emerges on the other side of the board with a speed of +234 m/s. Assuming constant acceleration (rather, ...

*May 21, 2015 by sandy*

**Physics/Science**

A startled armadillo leaps upward rising 0.547 m in the first 0.202 s. (a) What is its initial speed as it leaves the ground? _____m/s (b) What is its speed at the height of 0.547 m? _____m/s (c) How much higher does it go? _____m Use distance vs time: d=vi*t - 1/2 g t^2 solve...

*January 25, 2007 by TechnoBoi11*

**physics**

a uranium-238 nucleus may stay in one piece for billions of years, but later it decays into an a particle of mass 6.64 x 10^-27 and a thorium-234 nucleus of mass 3.88 x 10^-25. The decay process itself is extremely fast (about 10^-20 s). Suppose the uranium nucleus was at rest...

*February 7, 2011 by Susmitha*

**Physics**

A 46.0 kg man stands on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.85 m/s in 1.07 s. It travels with this constant speed for the next 6.80 s. The elevator then slows down (undergoes a uniform acceleration in the ...

*September 9, 2011 by Elisabeth*

**chem 101**

In an electron microscope the electrons generate the image. For one of the scanning electron microscopes in our Central Analytical Facility, the electrons are accelerated to have a kinetic energy of 200,000 eV. Electrons with this kinetic energy have a velocity of 2.67 x 10^8 ...

*April 15, 2012 by Anonymous*

**physics Classical Mechanics**

Consider a rocket in space that ejects burned fuel at a speed of vex= 1.5 km/s with respect to the rocket. The rocket burns 8 % of its mass in 280 s (assume the burn rate is constant). (a) What is the speed v of the rocket after a burn time of 140.0 s? (suppose that the rocket...

*December 8, 2013 by Andy*

**Physics**

You kick a ball off the ground with a horizontal speed of 16 m/sec and a vertical speed of 20.7 m/sec. 1. The ball reaches it's highest point how many seconds after it is kicked. 2. It reaches the ground how many seconds after it is kicked.

*October 3, 2014 by Mack K*

**physics**

The largest tension that can be sustained by a stretched string of linear mass density μ, even in principle, is given by τ = μc2, where c is the speed of light in vacuum. (This is an enormous value. The breaking tensions of all ordinary materials are about 12 ...

*March 2, 2015 by barýþ*

**math**

Jake and Sara each drive 270 miles to attend a conference. Jake drives at an average speed that is 15 mi/h slower than Sara’s average speed. It takes Jake 1.5 hours longer than Sara to drive the 270 miles. How long does it Jake to make the trip?

*May 12, 2014 by ray*

**physics**

I need to find the centripetal acceleration of my clothes dryer. How would I go about doing it... Would the tangential speed just be 2pi*R*number of rotations/time, or how would I find that? Put a shoe in the dryer. Count the number of times the shoe tumbles in a minute (that ...

*May 1, 2007 by Mischa*

**physics**

A wheel is roatating freely at an angular speed of 800 rev/min on a Shaft of negligible moment of inertia. A second wheel initially at rest and with twice the moment of inertia of the first, is suddenly coupled to the same shaft. (a) what is the angular speed of the resultant...

*December 3, 2010 by kwaku*

**physics**

A wheel is roatating freely at an angular speed of 800 rev/min on a shaft of negligible moment of inertia. A second wheel initially at rest and with twice the moment of inertia of the first, is suddenly coupled to the same shaft. (a) what is the angular speed of the resultant...

*December 5, 2010 by Ama*

**Physics**

A wheel is rotating freely with an angular speed of 4840rad/s on a shaft whose moment of inertia is negligible. A second wheel, initially at rest and with 8 times the rotational inertia of the first is suddenly coupled to the same shaft. a) What is the angular speed of the ...

*November 4, 2014 by Misaki*

**physics**

a sky diver jumps out of a plane that is 3000m above ground with an initial upward speed of 6m/s she free falls for 20s (assume there is no wind at this time)before pulling the cord to activate the parachute she then falls to the ground at a constant downward speed of 5m/s, ...

*July 27, 2016 by gary*

**help physics**

A satellite, LangSat, moves in circular orbit around the Earth at a speed of 4.95kms-1. (i) What is the altitude of the satellite (ii) Determine the period of the satellite’s orbit (iii) What is the value of the gravity, g, at the satellite. (iv) If another satellite, DukuSat...

*September 2, 2013 by kent*

**Math**

A jet travels 480 miles in 2 hours. At this rate, how far could the jet fly in 8 hours? What is the rate of speed of the jet? In 8 hours it would travel 1920 miles. How would I find the rate of speed?

*September 30, 2015 by Steve B*

**Physics**

If I throw a tennis ball straight up in the air at the same time my friend throws one straight down at the same height-initial height 3 feet and initial speed 2 km, which ball lands on the ground first, has the greater acceleration, lands with a greater speed, travels the ...

*October 3, 2010 by Aubrey*

**physics**

two canoeists start paddling at the same time and head toward a small island in a lake. caneist 1 paddles with a speed of 1.35 m/s at an angle of 45 degrees north of east. canoeist 2 starts on the opposite shore of the lake,a distance of 1.5 km due east of canoeist 1. what ...

*December 13, 2011 by taylor*

**physics**

A car drives along a road section free of curves with speed v0 first through the hollow of a valley (radius of curvature r1) and then over a mountain top (radius of curvature r2). Let the driver have mass m. • What changes in his weight does the driver observe when passing ...

*March 25, 2013 by Teri*

**physics**

You are on a train traveling east at speed of 17.0 m/s with respect to the ground. 1) If you walk east toward the front of the train, with a speed of 1.1 m/s with respect to the train, what is your velocity with respect to the ground? 2) If you walk west toward the back of the...

*September 10, 2012 by ali*

**Mathematics**

Michelle rode her bicycle from her house to her school at an average speed of 8 miles per hour (mph). Later that day, she rode from school back home along the same route, at an average speed of 12 mph. If the round trip took her 1 hour, how many miles long is the round trip.

*August 30, 2007 by Ryomasa*

**Physics**

A 0.243 kg puck, initially at rest on a horizon- tal, frictionless surface, is struck by a 0.196 kg puck moving initially along the x axis with a speed of 3.16 m/s. After the collision, the 0.196 kg puck has a speed of 2.16 m/s at an angle of 40 to the positive x axis. ...

*April 26, 2012 by Cassidy*

**AP Physics B**

A 0.408 kg puck, initially at rest on a horizontal, frictionless surface, is struck by a 0.0886 kg puck moving initially along the x axis with a speed of 3.14 m/s. After the collision, the 0.0886 kg puck has a speed of 2.14 m/s at an angle of 38◦ to the positive x axis. ...

*November 1, 2012 by Daisy*

**physics**

A 0.201-kg plastic ball moves with a velocity of 0.30 m/s. It collides with a second plastic ball of mass 0.105 kg, which is moving along the same line at a speed of 0.10 m/s. After the collision, both balls continue moving in the same, original direction. The speed of the 0....

*December 18, 2012 by Noah*

**Physics**

A 0.201-kg plastic ball moves with a velocity of 0.30 m/s. It collides with a second plastic ball of mass 0.105 kg, which is moving along the same line at a speed of 0.10 m/s. After the collision, both balls continue moving in the same, original direction. The speed of the 0....

*December 19, 2012 by Noah*

**physics**

A 0.201-kg plastic ball moves with a velocity of 0.30 m/s. It collides with a second plastic ball of mass 0.105 kg, which is moving along the same line at a speed of 0.10 m/s. After the collision, both balls continue moving in the same, original direction. The speed of the 0....

*December 20, 2012 by Anonymous,*

**physics**

A tennis ball with a speed of 6.0 m/s is thrown perpendicularly at a wall. After striking the wall, the ball rebounds in the opposite direction with a speed of 4.0 m/s. If the ball is in contact with the wall for 0.012 s, what is the average acceleration of the ball while it ...

*September 7, 2012 by Tamera*

**Physics**

Two children are playing on two trampolines. The first child can bounce 1.6 times higher than the second child. The initial speed up of the second child is 5.2 m/s. (a) Find the maximum height the second child reaches. (b) What is the initial speed of the first child? (c) How ...

*September 14, 2011 by Sydney*

**Physics**

Two children are playing on two trampolines. The first child can jump one and a half times higher than the second child. The initial speed of the second child is 5 m/s. What is the maximum height of the second child? What is the initial speed of the first child? How long was ...

*October 12, 2014 by Jim*

**Physics URGENT!!!**

A 75.0 kg fullback running east with a speed of 6.00 m/s is tackled by a 82.0 kg opponent running north with a speed of 5.00 m/s. (a) Calculate the velocity of the players immediately after the tackle. (b)Calculate the direction of the players immediately after the tackle.(c)...

*October 17, 2012 by Megan*

**Physics**

4. A football player passes the ball. The ball leaves his hand and is caught 1.7 seconds later by a receiver 30 meters away. (You may assume the ball was caught at the same height from which it was thrown.) a) What is the vertical component of the velocity of the ball just ...

*October 5, 2012 by Anonymous*

**physics**

A pelican ﬂying along a horizontal path drops a ﬁsh from a height of 6.0 m. The ﬁsh travels 7.7 m horizontally before it hits the water below. What was the pelican’s initial speed? The acceleration of gravity is 9.81 m/s 2. If the pelican was traveling at ...

*October 9, 2012 by David*

**Math**

I don't understand this question, could someone solve/walk me through this? One afternoon in Fort Simpson, Northwest Territories, the air temperature was −10ºC and the wind speed was 25 km/h. The air temperature dropped by 5ºC in the evening, but the wind chill did not ...

*February 5, 2014 by Dennis*

**physics**

As it passes over Grand Bahama Island, the eye of a hurricane is moving in a direction 60.7° north of west with a speed of 37.4km/hr. Two hours later, the course of the hurricane suddenly shifts due north and its speed slows to 21.0km/hr. How far from Grand Bahama is the eye 5...

*September 22, 2014 by afia*

**Physics**

A Bugatti Veyron 16.4 can accelerate from 0 to 60 mi/h in 2.4 s. The Saleen S7 Twin Turbo goes "from 0 to 60" in 2.8 s. Determine the distance that the Bugatti Veyron would travel in the time it takes to reach 75 km/h, the speed limit on many Canadian roads. Compare your ...

*August 29, 2015 by Alyssa*

**Precalculus**

The quarterback of a football team releases a pass at a height of 7 feet above the playing field, and the football is caught at a height of 4 feet, 30 yards directly downfield. The pass is released at an angle of 35 degrees with the horizontal. The parametric equations for the...

*April 21, 2014 by Brittany*

**physics**

Suppose a fixed cannon is to fire a projectile at an enemy tank, which is moving toward the cannon at a speed of 15 mph. If the cannon is to fire at the moment the tank is 3 miles from the cannon and the muzzle speed of the cannon is 1100 mph, what is the correct equation to ...

*April 6, 2010 by drew*

**Physics**

A variable-length air column is placed just below a vibrating wire that is fixed at the both ends. The length of air column open at one end is gradually increased from zero until the first position of resonance is observed at 20 cm. The wire is 115.4 cm long and is vibrating ...

*October 1, 2012 by AJ*

**Physics**

A variable-length air column is placed just below a vibrating wire that is fixed at the both ends. The length of air column open at one end is gradually increased from zero until the first position of resonance is observed at 20 cm. The wire is 115.4 cm long and is vibrating ...

*October 5, 2012 by AJ*

**Physics**

In the figure below, an electron is moving rightward between two parallel charged plates separated by distance d = 2.40 mm. The particle is speeding up from an initial speed of 3620 km/s at the left plate. ｜ ｜ &#...

*January 31, 2013 by ann*

**Physics**

Given: G = 6.67259 × 10−11 Nm2/kg2 . A 602 kg geosynchronous satellite or- bits a planet similar to Earth at a radius 1.98 × 105 km from the planet’s center. Its angular speed at this radius is the same as the rotational speed of the Earth, and so they ap- pear ...

*February 7, 2012 by Holly *

**Physics**

Two blocks, each with a mass = 0.168 kg, can slide without friction on a horizontal surface. Initially, block 1 is in motion with a speed = 1.28 m/s; block 2 is at rest. When block 1 collides with block 2, a spring bumper on block 1 is compressed. Maximum compression of the ...

*March 5, 2012 by Lilly *

**trigonometry**

The sprockets and chain of a bicycle are shown in the figure. The pedal sprocket has a radius of 4 in., the wheel sprocket a radius of 2 in., and the wheel a radius of 13 in. The cyclist pedals at 45 rpm. (a) Find the angular speed of the wheel sprocket. rad/min (b) Find the ...

*November 29, 2012 by monic*

**physics**

Two blocks, each with a mass m = 0.400 kg, can slide without friction on a horizontal surface. Initially, block 1 is in motion with a speed $v$ = 1.20 m/s; block 2 is at rest. When block 1 collides with block 2, a spring bumper on block 1 is compressed. Maximum compression of ...

*March 5, 2014 by Ted*

**physics**

A uniform solid cylinder of radius R and a thin uniform spherical shell of radius R both roll without slipping. If both objects have the same mass and the same kinetic energy, what is the ratio of the linear speed of the cylinder to the linear speed of the spherical shell?

*December 5, 2011 by saud*

**physics**

Water is circulating through a closed system of pipes in a two- floor apartment. On the first floor, the water has a gauge pressure of 3.4*10^5 Pa and a speed of 2.1 m/s. However, on the second floor, which is 4.0 m higher, the speed of the water is 3.7 m/s. The speeds are ...

*April 17, 2012 by Fluids, Pressure, Bernoulliâ€™s Equation*

**Projectile**

An enemy plane is flying horizontall at a distance of 2.0km with a speed of 340m/s.An army man with anti-craft gun on the ground sight the enemy with a muzzle speed at 60m/s .when the enemy plane is directly overhead.find a)at what angle from the verticals should the gun be ...

*January 16, 2016 by Skykid*

**physical sciences**

A delivery Is travelling at a constant speed of 15m/s in a 60 km.h speed zone when the driver seems people walking across a pedestrian crossing 50m ahead of him.the driver takes exactly one second to react before he applies brakes as hard as he can.it takes a further 3 seconds...

*September 21, 2016 by ayanda*

**physical sciences**

A delivery Is travelling at a constant speed of 15m/s in a 60 km.h speed zone when the driver seems people walking across a pedestrian crossing 50m ahead of him.the driver takes exactly one second to react before he applies brakes as hard as he can.it takes a further 3 seconds...

*September 21, 2016 by ayanda*

**PHYSICS**

A 60.8-kg skateboarder starts out with a speed of 1.84 m/s. He does 90.8 J of work on himself by pushing with his feet against the ground. In addition, friction does -278 J of work on him. In both cases, the forces doing the work are non-conservative. The final speed of the ...

*April 22, 2015 by KS*

**Physics**

The siren of a police car produces a sound of frequency 420Hz.A man sitting next to the road notices that the pitch of the sound changes as the car moves towards and then away from him.1- WRITE DOWN THE NAME OF THE PHENOMENON. 2-ASSUME THAT THE SPEED OF THE SOUND IN AIR IS ...

*October 12, 2010 by Lydia*

**physics**

A toboggan is sliding down a snowy slope. The table shows the speed of the toboggan at various times during its trip. (a) Make a graph of the speed as a function of time. (b) Judging by the graph, is it plausible that the toboggan’s acceleration is constant? If so, what is the...

*September 6, 2011 by John*

**Phsyics**

A projectile is fired with an initial speed of 61.3m/s at an angle of 44.2∘ above the horizontal on a long flat firing range. (a) Determine the maximum height reached by the projectile. (b) Determine the total time in the air. (c) Determine the total horizontal distance ...

*September 15, 2013 by Tucker*

**PHYSICS ENERGY CONSERVATION!!**

The car shown in the figure has a mass of 395 kg when it passes through point A with a speed of 17.7 m/s, being the height of A 7.2 m above the ground (y = 0). In the instant that passes through C its speed is diminished to 7.6 m/s. Assuming that the path has no friction (a) ...

*April 10, 2016 by Malcolm*

**algebra**

9. 9/5w + 8/w ** Cannot be simplified. Am I correct?? 14. The number of instrctions N performed per second by a computer varies directly as the speed S of the computer's internal processor. A processor with a speed of 20 megahertz an perform 1,800,000 instructions per second. ...

*September 26, 2013 by Help*

**Algbra**

It’s the end of the semester, and sisters Sarah and Chelsea are eager to head home for the summer. It’s a long drive, and Sarah’s old car can manage an average speed of only 55 miles per hour, so she leaves early in the morning. An hour later, Chelsea follows her at an average...

*April 24, 2015 by Brian*

**Algebra**

It’s the end of the semester, and sisters Sarah and Chelsea are eager to head home for the summer. It’s a long drive, and Sarah’s old car can manage an average speed of only 55 miles per hour, so she leaves early in the morning. An hour later, Chelsea follows her at an average...

*April 24, 2015 by Brian*

**Physics**

A power boat of mass 495 kg is cruising at a constant speed of 8.9 m/s. The propeller provides a drive force of 780 N. The driver of the boat shuts off the engine, and the boat coasts to a halt. Assume-contrary to fact-that the resistive force due to the water is constant, ...

*February 25, 2008 by John*

**Physics**

A power boat of mass 460 kg is cruising at a constant speed of 8.9 m/s. The propeller provides a drive force of 765 N. The driver of the boat shuts off the engine, and the boat coasts to a halt. Assume-contrary to fact-that the resistive force due to the water is constant, ...

*February 25, 2008 by Peter*

**physics**

A power boat of mass 465 kg is cruising at a constant speed of 8.9 m/s. The propeller provides a drive force of 765 N. The driver of the boat shuts off the engine, and the boat coasts to a halt. Assume-contrary to fact-that the resistive force due to the water is constant, ...

*October 23, 2010 by Xavier*

**Physics**

The A string of a violin is 31 cm long between fixed points with a fundamental frequency of 440 Hz and a mass per unit length of 5.8×10^−4 kg/m. What are the wave speed in the string? What are the tension in the string? What is the length of the tube of a simple wind ...

*December 7, 2010 by Jake*

**Physics**

question 1 ..A 5 kg rock is thrown vertically upward at 12 m/s. How high did the rock rise? question 2 The driver of a truck traveling at 126 km/h on a highway sees a sign which indicated that 800 m after the sign the maximum speed will be 90 km/h . When the truck passes the ...

*November 21, 2015 by Axe*

**Algebra**

Two trains, one going from Boston to New York and the other going from New York to Boston, started their trips at exactly same time. Speed of the first train was 10 miles per hour less than twice the speed of the second train. How far from Boston station have they met, if the ...

*February 27, 2016 by Anish Panda*

**Algebra**

Two trains, one going from Boston to New York and the other going from New York to Boston, started their trips at exactly same time. Speed of the first train was 10 miles per hour less than twice the speed of the second train. How far from Boston station have they met, if the ...

*March 1, 2016 by Emily*

**physics**

Heather and Jerry are standing on a bridge 53m above a river. Heather throws a rock straight down with a speed of 12m/s . Jerry, at exactly the same instant of time, throws a rock straight up with the same speed. Ignore air resistance. How much time elapses between the first ...

*October 9, 2014 by Mariah*

**Physics**

The ball spins at 7.7 rev/s. In addition, the ball is through with a linear speed of 19 m/s at an angle of 55 degrees with respect to the ground. If the ball is caught at the same height at which it left the quarterback's hand, how many revolutions has the ball made in the air...

*December 21, 2009 by Christopher*

**physics 203**

Water (p=1000kg/m^3) enters a pipe on the ground with an inside diameter of 2cm at a pressure of 4x10^5 Pa. Then a 1-cm diameter pipe leads the water to a height of 5m above the ground. The flow speed at the inlet is v1=1.5m/s. A) Find the flow speed at the outlet. B) Find the...

*April 9, 2013 by ash*

**physics**

Two children are playing on two trampolines. The first child can bounce 1.4 times higher than the second child. The initial speed up of the second child is 4.8 m/s. The maximum height of the second child is 1.17m and the initial speed of the first child is 5.66 m/s. How long ...

*September 29, 2011 by Brianna*

**math**

A passenger train travelled at an average speed of 72 km/h. A man on the passenger train observed a goods train, which was travelling at a speed of 54 km/h, in the on-coming direction. If the goods train passed him in 10 seconds, find the length of the goods train. Is it ...

*September 3, 2012 by Im*

**physic**

You are traveling at a constant speed υM, and there is a car in front of you traveling with a speed υA You notice that υM>υA, so you start slowing down with a constant acceleration a when the distance between you and the other car is x. What relationship...

*September 29, 2013 by kolam*

**Physics**

A 4kg and a 2kg block are moving along a horizontal frictionless surface. The 4 kg block is moving to the right with a speed of 6 m/s and the 2 kg block is moving to the left with a speed of 3 m/s. The two blocks collide inelastically and then continue to move together along ...

*November 17, 2009 by Jon Routh*

**phsyics **

A car races on a circular track of radius r. (a) Write an equation for the car's average speed when it travels a complete lap in time t. (b) The radius of the track is 100 m and the time to complete a lap is 14 s. Show that the average speed around the track is 45 m/s.

*March 19, 2014 by price *

**tangential speed and accelerations**

A helicoptor bladehas an angular speed of 6.50 rev/s and has an angular acceleration of 1.30 rev/s. point 1 on the blade is 3.00m and point 2 is 6.7m. Can you find the speeds of A) the tangential speeds and B) the tangential accelerations?

*October 12, 2010 by J*

**math(rational functions application)**

The average speed of a jet is 100km/h faster than a cargo plane. To travel 1400km, the cargo plane requires 25% more time than the jet. Find the average speed of the jet. This is the formula I figured out so far. V(average)=V(jet)-V(cargo 100km/h= d/t - d/t 100= [1400km/x] - [...

*October 22, 2009 by jane*

**calculus**

Boat A leaves the dock at 12pm heading due South at a constant speed of 20 km/h. Meanwhile, at 12pm Boat B, a pirate ship, is 15 km due West of the dock where boat A started, and is sailing due East at a constant speed of 15 km/h. If the pirates get within 10 km of another ...

*November 10, 2010 by Anya*

**Science**

Two satellites are launched at a distance R from a planet of negligible radius. Both satellites are launched in the tangential direction. The ﬁrst satellite launches correctly at a speed v0 and enters a circular orbit. The second satellite, however, is launched at a ...

*December 22, 2011 by Anonymous*

**math-pre calc**

On a drive from your home to town, you wish to average 48 mph. The distance from your home to town is 106 miles. However, at 53 miles (half way), you find you have averaged only 36 mph. What average speed must you maintain in the remaining distance in order to have an overall ...

*September 24, 2014 by liz*

**physics**

An m=150 g block hits an M= 265 g block initially at rest on a horizontal surface. After impact they stick together and slide 7.47 m before coming to rest. The coefficient of friction between blocks and surface is 0.39. a) What is in m/s the speed of both blocks immediately ...

*November 1, 2014 by Serena*

**Physics**

A golfer, standing on a fairway, hits a shot to a green that is elevated 5.50 m above the point where she is standing. The ball leaves her club at an angle of 37.0° above the ground, with a speed of 31.1 m/s. Find the time that the ball is in the air before it hits the green...

*February 1, 2015 by Tanner*

**Physics**

A golfer, standing on a fairway, hits a shot to a green that is elevated 5.50 m above the point where she is standing. The ball leaves her club at an angle of 37.0° above the ground, with a speed of 31.1 m/s. Find the time that the ball is in the air before it hits the green. ...

*February 2, 2015 by Paige*

**physics**

a gun,kept on straight horizontal ground is used to hit a car, traveling along the same road away from the gun with a uniform speed of 72km/h.The car is at a distance of 500m from the gun. when the gun is fired at an angle of 45 degrees with the horizontal. find (1) the ...

*May 25, 2016 by jabulani*

**Physics**

(a) If the maximum acceleration that is tolerable for passengers in a subway train is 1.52 m/s2 and subway stations are located 1030 m apart, what is the maximum speed a subway train can attain between stations? b)what is the travel time between stations? c)If a subway train ...

*September 3, 2009 by Nick*

**physics**

(a) If the maximum acceleration that is tolerable for passengers in a subway train is 1.52 m/s2 and subway stations are located 1030 m apart, what is the maximum speed a subway train can attain between stations? b)what is the travel time between stations? c)If a subway train ...

*September 4, 2009 by Nick*

**math**

A motorcycle leaves colorado springs, colorado, traveling north on I25 at an average speed of 47 mph. one hour later, a car leaves colorado springs, traveling south on I-25 at an average speed of 54 mph. How long after the motorcycle leaves will it take until they are 52 miles...

*March 5, 2013 by kelly*

**Intergated chemistry/physics**

A 10 pound bowling ball with a speed of 2.0 meters/second hits a 6 pound bowling ball. If the 10 pound bowling ball stops after the collision, what is the resulting speed of the 2nd ball in meters/second

*October 4, 2012 by Laura*

**science**

as the speed of a fluid increases the pressure decreases. as the speed of the fluid decreases, the pressure increases. what is this called?

*April 6, 2008 by troy*

**Physics**

Which of the following is not a good example of uniform circular motion? a) a person riding on a ferris wheel that is turning at a constant rate b) a person taking off on an airplane to fly around the world on a path defined by the equator c) a race car driving at a constant ...

*October 16, 2012 by Lewis*

**Physics**

An arrow is fired with a speed of 20.0 m/s at a block of Styrofoam resting on a smooth surface. The arrow penetrates a certain distance into the block before coming to rest relative to it. During this process the arrow's deceleration has a magnitude of 1300 m/s2 and the block'...

*October 12, 2009 by Robert C*

**physics**

Stickman is driving a dragster. He does the quarter mile in 4 seconds and at the finish line is speed is 100m/s. He deploys his parachute after he crosses the finish line and wished to slow to a speed of 10m/s in 10s. What diameter parachute does he need if the drag force is ...

*October 1, 2011 by Norman*