Tuesday

October 21, 2014

October 21, 2014

Number of results: 20,304

**PHYSICS**

ball is dropped from certain height another ball is projected horizontally from the same point . Which statement is correct A BOTH HIT GROUND AT SAME VELOCITY B BOTH HIT GROUND AT SAME SPEED C change of velocity during path for both balls is same D change of SPEED during path ...
*June 11, 2014 by AYESHA*

**Physics**

i know this is alot to ask for but these 10 i can nott get out of the 30 A man pulls a 10-kg box across a smooth floor with a force of 71 newtons at an angle of 23 degrees and for a distance of 97 meters. How much work, to the nearest joule, does he do...
*December 10, 2008 by Michelle*

**physics**

A cannonball is shot (from ground level) with an initial horizontal velocity of 38.0 m/s and an initial vertical velocity of 26.0 m/s. 1) What is the initial speed of the cannonball? 2) What is the initial angle θ of the cannonball with respect to the ground? 3) What is ...
*August 29, 2012 by Dante*

**pyhsics**

A cannonball is shot (from ground level) with an initial horizontal velocity of 36.0 m/s and an initial vertical velocity of 21.0 m/s. 1) What is the initial speed of the cannonball? 2) What is the initial angle θ of the cannonball with respect to the ground? 3) What is ...
*September 8, 2012 by ali*

**Physics**

A cannonball is shot (from ground level) with an initial horizontal velocity of 38.0 m/s and an initial vertical velocity of 26.0 m/s. The initial speed of the cannonball 46.04 m/s The initial angle θ of the cannonball with respect to the ground 34.38° What is the maximum...
*September 11, 2012 by Kayla*

**Physics**

A cannonball is shot (from ground level) with an initial horizontal velocity of 38.0 m/s and an initial vertical velocity of 26.0 m/s. The initial speed of the cannonball 46.04 m/s The initial angle θ of the cannonball with respect to the ground 34.38° What is the maximum...
*September 11, 2012 by Kayla*

**Physics**

A cannonball is shot (from ground level) with an initial horizontal velocity of 38.0 m/s and an initial vertical velocity of 26.0 m/s. The initial speed of the cannonball 46.04 m/s The initial angle θ of the cannonball with respect to the ground 34.38° What is the maximum...
*September 11, 2012 by Kayla*

**Physics**

A cannonball is shot (from ground level) with an initial horizontal velocity of 38.0 m/s and an initial vertical velocity of 26.0 m/s. The initial speed of the cannonball 46.04 m/s The initial angle θ of the cannonball with respect to the ground 34.38° What is the maximum...
*September 11, 2012 by Kayla*

**physics**

In a game of pool, the cue ball strikes another ball initially at rest. After the collision, the cue ball moves at 4.15 m/s along a line making an angle of -25° (i.e. below the x-axis) with its original direction of motion (the x-axis), and the second ball has a speed of 2.846...
*March 3, 2012 by Katie*

**Calculus**

The speed of a runner increased steadily during the first three seconds of a race. Her speed at half-second intervals is given in the table below. Find lower and upper estimates of the distance she covered during the first three seconds of the race. Use left- and right- ...
*April 11, 2013 by Anonymous*

**PHYSICS!!!**

Water moves through a constricted pipe in steady, ideal flow. At the lower point shown in the figure below, the pressure is 1.70 105 Pa and the pipe radius is 2.80 cm. At the higher point located at y = 2.50 m, the pressure is 1.22 105 Pa and the pipe radius is 1.70 cm. (a) ...
*November 11, 2012 by k*

**Physics**

Two cars travel at the same speed, so that they move 105 km in one hour. One car, a sleek sports car, has a motor that delivers only 35 kW of power at this speed. The other car needs its motor to produce 65 kW to move the car this fast. The difference is caused by air ...
*August 18, 2011 by Gullu*

**Physics**

Two cars travel at the same speed, so that they move 105 km in one hour. One car, a sleek sports car, has a motor that delivers only 35 kW of power at this speed. The other car needs its motor to produce 65 kW to move the car this fast. The difference is caused by air ...
*August 18, 2011 by Gullu*

**physics**

1. A student is dragging a 5 kg box along the floor. He pulls on the rope with a 25 Newton force. The rope is 37 degrees above horizontal. As the box slides 10 meters, it goes from a speed of 3 m/s to a speed of 7 m/s. a.) calculate the normal force on the box b.) calculate ...
*January 12, 2011 by Energy*

**PHYSICS**

A bead of mass m slides without friction on a vertical hoop of radius R . The bead moves under the combined action of gravity and a spring, with spring constant k , attached to the bottom of the hoop. Assume that the equilibrium (relaxed) length of the spring is R. The bead is...
*October 19, 2013 by PLS HELP ME*

**physics**

A bead of mass m slides without friction on a vertical hoop of radius R . The bead moves under the combined action of gravity and a spring, with spring constant k , attached to the bottom of the hoop. Assume that the equilibrium (relaxed) length of the spring is R. The bead is...
*October 19, 2013 by PLS HELP ME*

**physics**

A bead of mass m slides without friction on a vertical hoop of radius R . The bead moves under the combined action of gravity and a spring, with spring constant k , attached to the bottom of the hoop. Assume that the equilibrium (relaxed) length of the spring is R. The bead is...
*October 19, 2013 by Anonymous*

**physics**

A bead of mass m slides without friction on a vertical hoop of radius R . The bead moves under the combined action of gravity and a spring, with spring constant k , attached to the bottom of the hoop. Assume that the equilibrium (relaxed) length of the spring is R. The bead is...
*October 20, 2013 by Anonymous*

**physics**

A bead of mass m slides without friction on a vertical hoop of radius R . The bead moves under the combined action of gravity and a spring, with spring constant k , attached to the bottom of the hoop. Assume that the equilibrium (relaxed) length of the spring is R. The bead is...
*October 20, 2013 by Anonymous*

**PHYSICS**

A bead of mass m slides without friction on a vertical hoop of radius R . The bead moves under the combined action of gravity and a spring, with spring constant k , attached to the bottom of the hoop. Assume that the equilibrium (relaxed) length of the spring is R. The bead is...
*October 21, 2013 by Anonymous*

**physics**

1) a loaded cart with a mass of 96 kg sits at reat atop a 40 degree inclined plane that measures 20.5m long. accidentally the cart starts so to roll down the inclined plane with a frictional force of 5550N working against it for the intire 20.5m. deteremine the speed at the ...
*February 21, 2011 by shelly*

**another physics question**

A liquid ( = 1.65 g/cm3) flows through two horizontal sections of tubing joined end to end. In the first section the cross-sectional area is 10.0 cm2, the flow speed is 275 cm/s, and the pressure is 1.20 105 Pa. In the second section the cross-sectional area is 3.50 cm2. a....
*December 10, 2006 by Jen*

**Physics **

Car A uses tires for which the coefficient of static friction is 0.357 on a particular unbanked curve. The maximum speed at which the car can negotiate this curve is 27.7 m/s. Car B uses tires for which the coefficient of static friction is 0.737 on the same curve. What is the...
*June 27, 2013 by Justin S.*

**physics **

Car A uses tires for which the coefficient of static friction is 0.333 on a particular unbanked curve. The maximum speed at which the car can negotiate this curve is 13.8 m/s. Car B uses tires for which the coefficient of static friction is 0.843 on the same curve. What is the...
*October 20, 2014 by S*

**Physics **

A 2.0kg wood block is launched up a wooden ramp that is inclined at a 26 angle. The block's initial speed is 8.0 m/s. The coefficient of kinetic friction of wood on wood is 0.200. a) What vertical height does the block reach above its starting point? Express your answer to two...
*October 10, 2012 by senko*

**Physics**

A red ball is thrown down with an initial speed of 1.2 m/s from a height of 25 meters above the ground. Then, 0.6 seconds after the red ball is thrown, a blue ball is thrown upward with an initial speed of 22.9 m/s, from a height of 0.8 meters above the ground. The force of ...
*February 2, 2014 by Cam*

**Physics**

A 325 kg boat is sailing 15.0 degrees north of east at a speed of 2.00 m/s. Thirty seconds later, it is sailing 35.0 degrees north of east at a speed of 4.00 m/s. During this time three forces act on the boat: a 31.0 N force directed 15.0 degrees north of east (due to an ...
*October 14, 2010 by Melanie*

**physics help**

in a local diner a customer slides an empty coffee cup down the counter for a refill. the cup slides off the counter and strikes the floor at a distance d from the base of the counter. if the height of the counter is h. a) find an expression for the time t it takes the cup to ...
*October 3, 2011 by john*

**physics**

A red train traveling at 72 km/h and a green train traveling at 144 km/h are headed toward one another along a straight, level track. When they are 950m apart, each engineer sees the other’s train and applies the brakes. The brakes decelerate each train at the rate of 1 m/s^2...
*September 17, 2006 by ben*

**physics**

C Exercise 3.57 In laboratory situations, a projectile’s range can be used to determine its speed. To see how this is done, suppose a ball rolls off a horizontal table and lands 1m out from the edge of the table. Part A If the tabletop is 70cm above the floor, determine the ...
*September 29, 2014 by janie*

**Physics**

I need a complete list all the doppler effect equations for a beginner physics class. Here is a sample questions so you know the level Question: Two trains on separate tracks move toward one another. Train #1 has a speed of 130 km/hr and train #2 a speed of 90km/hr. Train 2 ...
*July 7, 2011 by Tina*

**math**

What is true for motion in a straight line. A. if a vechile has zero velocity , it must be stationary. B.the graph of position against time has to be a straight line. C.acceleration is the rate of change of speed. D.velocity is the rate of change of position. E.a reversing ...
*May 16, 2010 by JAndu Andu*

**Physics**

a) The coefficient of kinetic friction between a steel block and an ice rink surface is 0.0100. If a force of 24.5 N keeps the steel block moving at a steady speed, what is the force of gravity on the block? b)A copper block has dimensions 1 cm × 2 cm × 4 cm. A force of 0.10 N...
*September 29, 2012 by Hanu*

**Physics..please help**

A car is traveling at 20m/s when it pulls out to pass a truck that is traveling at only 18m/s. The car accelerates at 2.0m/s^2 for 4.0 s and then maintains this new velocity. First it asked me to calculate the distance during acceleration so I used d = (v1)(t)+[(a)(t^2)]/2 and...
*October 29, 2007 by Alex*

**Physics - KE/Inertia**

The rigid body shown in Figure 10-66 (it is a triangle with the upper mass = to M and the bottom two corners/masses equal to 2M. The bottom side length equals .70 cm with point P in the middle of the side and the other two sides equal .55 cm) consists of three particles ...
*March 25, 2007 by COFFEE*

**physics **

hi every one i appreciate help as ineed answer as soon a jetplane discharges a jet at rate of 28kg/s with a velocity of 950 m/s relative to the plane if the forward speed of the plane is 875km/h what is the thrust developped on the plane and the power developed at the jet the ...
*December 15, 2012 by georgie*

**physics**

In a simple model of the wind speed associated with hurricane Emily, we assume there is calm eye 10.0 km in radius. The winds, which extend to a height of 5550 m, begin with a speed of 208.0 km/hr at the eye wall and decrease linearly with radial distance down to 0 km/hr at a ...
*March 17, 2008 by shelby*

**physics**

While taking a plane flight to a meeting, a physicist decides to do a mental calculation of how much fuel the plane would consume in the absence of friction, assuming its engines have an efficiency of 22.0% and the mass of the plane is 200,000 kg. Each gallon of jet fuel ...
*July 25, 2013 by Justin*

**physics-mechanics**

A high-speed test track for cars has a curved section — an arc of a circle of radius R = 1440 m. The curved section is banked at angle a = 19.1 degrees from the horizontal to help the cars to stay in the road while moving at high speeds. The acceleration of gravity is 9.8 m/s^...
*February 12, 2011 by J*

**Math - Precalculus - Parametric Equations/Geometry**

A hockey puck of diameter 3 inches is spinning around its center at a speed of 3 counterclockwise rotations per second. The center of the puck is traveling at a speed of 24 inches per second at an angle of 45 degrees to the positive real axis. (a) At time t=0, the center of ...
*December 11, 2013 by Sam*

**physics**

Question Part Points Submissions Used 1 2 3 4 5 0/5 –/5 5/5 0/5 0/5 1/10 0/10 1/10 2/10 2/10 Total 5/25 A car initially traveling eastward turns north by traveling in a circular path at uniform speed as in the figure below. The length of the arc ABC is 210 m, and the car ...
*October 22, 2011 by carlton*

**Physics (Momentum)**

Please help me answer this problem.How do I answer this if I don't have the mass of the monkey and the scooter together? At a circus animal training facility, a monkey rides a miniature motorscooter at a speed of 7.0 m/s. The monkey and scooter together have a mass of m kg. ...
*May 2, 2013 by Kathy*

**Physics (Momentum)**

Please help me answer this problem.How do I answer this if I don't have the mass of the monkey and the scooter together? At a circus animal training facility, a monkey rides a miniature motorscooter at a speed of 7.0 m/s. The monkey and scooter together have a mass of m kg. ...
*May 2, 2013 by Kathy*

**physics(HELP IT'S URGENT)**

A bead of mass m slides without friction on a vertical hoop of radius R . The bead moves under the combined action of gravity and a spring, with spring constant k , attached to the bottom of the hoop. Assume that the equilibrium (relaxed) length of the spring is R. The bead is...
*October 20, 2013 by Anonymous*

**PHYSICS URGENT HELP**

A bead of mass m slides without friction on a vertical hoop of radius R . The bead moves under the combined action of gravity and a spring, with spring constant k , attached to the bottom of the hoop. Assume that the equilibrium (relaxed) length of the spring is R. The bead is...
*October 20, 2013 by Anonymous*

**physics(elena)**

A bead of mass m slides without friction on a vertical hoop of radius R . The bead moves under the combined action of gravity and a spring, with spring constant k , attached to the bottom of the hoop. Assume that the equilibrium (relaxed) length of the spring is R. The bead is...
*October 20, 2013 by Anonymous*

**Physics(Please respond)**

A golfer hits a shot to a green that is elevated 3.0 m above the point where the ball is struck. The ball leaves the club at a speed of 17.4 m/s at an angle of 35.0¢ª above the horizontal. It rises to its maximum height and then falls down to the green. Ignoring air resistance...
*May 29, 2012 by Hannah*

**physics**

A circus a dog is traned to run a stranght path of length 50m/s in the direction AB as shown in the accompanying diagram.the dog starting from rest can attain a maxium speed of 5m/s in 10sec when released from any point along the path AB .the after it maintains the speeds of ...
*April 11, 2012 by Nelson*

**Chemistry/Physics**

Calculate the translational kinetic energy of O2 at a) 300. K b) 1000. K Speed is not given. Do I need to find the average speed first? The formula I'm using is Ek= 1/2m v^2 I notice I'm not given mass in the problem either. Would I use molar mass? You are on a tangent. You ...
*January 6, 2007 by John*

**Astronomy**

Imagine that you have found an object out in space. When you use the inverse square law to compute its luminosity, you get a ridiculously large value. You therefore suspect that relativistic beaming is at work - the radiation is coming from a jet traveling at speed v directly...
*May 11, 2014 by qwerty*

**Physics**

Review Conceptual Example 2 as an aid in understanding this problem. A velocity selector has an electric field of magnitude 2607 N/C, directed vertically upward, and a horizontal magnetic field that is directed south. Charged particles, traveling east at a speed of 6.81 103 m/...
*March 13, 2013 by picm*

**physics**

Henrietta is going off to her physics class, jogging down the sidewalk at a speed of 4.20 . Her husband Bruce suddenly realizes that she left in such a hurry that she forgot her lunch of bagels, so he runs to the window of their apartment, which is a height 54.2 above the ...
*September 23, 2010 by nizyy*

**trigonometry**

The minute hand of a clock is 8 inches long. How far does the tip of the minute hand move in 30 minutes? How far does it move in 20 minutes? For 30 min. I got 8pie inches. For 20 mins., I got (16pie/3)inches. but i don't know if these answers are correct. if my answers are ...
*May 1, 2007 by michelle*

**AP Physics**

Two particles, each of mass m and speed v, travel in opposite directions along parallel lines separated by a distance d. A)Find an expression for the magnitude L of the angular momentum of the two-particle system around a point midway between the two lines. Use m for the mass...
*February 8, 2008 by Darlene*

**physics**

A block of mass 0.570 kg is pushed against a horizontal spring of negligible mass until the spring is compressed a distance x. The force constant of the spring is 450 N/m. When it is released, the block travels along a frictionless, horizontal surface to point B, the bottom of...
*March 2, 2009 by Jessi*

**Physics**

Water flows at a speed of 15 m/s through a pipe that has a radius of 0.40 m. The water then flows through a smaller pipe at a speed of 45 m/s. What is the radius of the smaller pipe?
*December 19, 2011 by Ben*

**science**

the speed of a 5000-kg truck whose KE is 360 kJ is how many m/s?
*February 17, 2008 by janeen*

**DrBob222**

If a wave has a period of .02 seconds and a speed of 4 m/s, what is its wavelength? .08 m
*April 5, 2008 by Jon*

**Physics**

What is the speed of a 748N person that expends 2260J of K.E. ?
*February 18, 2009 by Cindy*

**physics**

what is the symbol for speed and what unit of measurement is used?
*March 17, 2009 by Candice*

**science**

what are the possible units for time, speed, and distance
*March 19, 2009 by lilianna*

**science**

how does increasing the speed of an object change it's momentum?
*March 24, 2009 by jessica*

**computers**

Average typing speed for middle school
*March 20, 2010 by shannon*

**physics**

what speed will an electron acquire if it has 1800 J of energy?
*April 12, 2010 by john*

**Physics**

What is the speed of an object in circular motion called?
*May 24, 2010 by James*

**physics**

hi I need on the formula for average speed or rate thanks
*June 26, 2010 by Jen*

**physics**

is this right: velocty is speed in a particular distance.
*September 24, 2010 by chelsea*

**math**

if you jog 72 miles in 3.5 hours what is your average speed?
*October 19, 2010 by tedeja*

**chemistry**

what is the wavelength of an electron traveling at 1.65% of the speed of light?
*December 10, 2010 by Jake*

**science**

What was the average speed in km/h of a car that travels 400.0 km in 4.5 h?
*January 16, 2011 by Anonymous*

**physics**

a hare can run 100m in 5 seconds what is its speed
*January 17, 2011 by tom turner*

**Physics**

how do you figure out take off speed?
*February 3, 2011 by Dee*

**physics**

A boy walks 13 km in 2.0 h. What is his speed in km/h and m/s. Show work.
*August 25, 2011 by Lexi*

**physics**

A 9.000 kg ball has a speed of 16.0 m/s. What is its kinetic energy?
*March 20, 2011 by Anonymous*

**physics**

what is the speed of a car in km/n if it travels 108 km. in 1 min.?
*June 28, 2011 by junna rose*

**Chem**

What is the speed of an argon atom that has a de Broglie wavelength of 5.2 pm?
*July 3, 2011 by Chris*

**Math**

A car covers 2924 km in 43 hrs. What is it's speed
*September 12, 2011 by Monique*

**physics**

what is the speed in unit if a body travels at 108 km/hr
*September 14, 2011 by Anonymous*

**Physics**

a water wave has frequency 0.40 Hz and wavelength 2.0m. Its speed is
*January 10, 2012 by Amber *

**Physics**

a water wave has frequency 0.40 Hz and wavelength 2.0m. Its speed is
*January 10, 2012 by Amber *

**Physics**

a water wave has frequency 0.40 Hz and wavelength 2.0m. Its speed is
*January 10, 2012 by Amber *

**Physic**

An airplane flew 1000km in 4h. What was the airplanes speed?
*February 5, 2012 by Brionna*

**science**

a *blank* is a tool that measure speed in an vehicle.
*February 23, 2012 by Bella*

**trig**

y=25sin(120t-4x) what is the wave length what is the speed
*March 3, 2012 by Sylvia Oni*

**Science**

what are two things that you must know to determine speed?
*April 10, 2012 by ellie*

**physics**

What is the wavelength of an electron moving at 2.60% of the speed of light? 1 m
*May 29, 2012 by Amelia*

**Physics**

If you run 100 m at 5 m/s and 300 m at 1 m/s, what is your average speed?
*June 21, 2012 by anonymous*

**Physics**

What happens to the particle speed as the temperature is increased?
*July 19, 2012 by Alfrieda*

**Mathematics**

how do you calculate the time when average speed is given
*July 25, 2012 by Samara *

**science **

how does a change in wavelength affect the speed of a photon.
*October 3, 2012 by emma*

**Chemistry**

What is the root-mean-square speed of N2O at 25°C?
*November 6, 2012 by Brittany*

**physics**

what is the frequency of wavelength 5.5cm travelling at 2 a speed of 1.6 m\s?
*November 19, 2012 by chad*

**Physics**

A satellite is orbiting the earth at a distance of 1.00 x 10^3 km. What is its speed?
*November 28, 2012 by Andrew*

**Physics**

Whats the speed of an electron of Bohr's orbit K
*January 23, 2013 by Dyana*

**science**

how do i calculate the average speed and velocity on a graph??
*January 23, 2013 by valeria*

**math**

what is the speed of 43.2meters/ second in miles/hour?
*February 6, 2013 by Ruth*

**Science**

what is the unit for measuring the speed at which a motor spins?
*February 15, 2013 by Shane*

**Chemistry**

What is the wavelength of an electron traveling at 7.59% of the speed of light?
*March 14, 2013 by Brian*

**science**

what happens to the G-force as the speed of the centrifuge increases?
*May 5, 2013 by kate*

**Physics**

A truck has an average speed of 55 km/h. How far does it travel in 3.65 h?
*August 22, 2013 by Snead*

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