# speed

26,339 results

**Physics**

A 69.5kg football player is gliding across very smooth ice at 2.15m/s . He throws a 0.470kg football straight forward. A) What is the player's speed afterward if the ball is thrown at 16.0m/s relative to the ground? B) What is the player's speed afterward if the ball is thrown...

**physics**

The position of a 0.43 kg object attached to a spring is described by [x = (0.49 m) cos(1.25πt)] a) What is the amplitude of oscillations in m? b) What is in meters/second the maximum speed of the oscillating object? Answer in meters/seconds . c) Find in meters/second the...

**physics**

The position of a 0.31 kg object attached to a spring is described by [x = (0.85 m) sin(2.37πt + 0.35)] a) What is the amplitude of oscillations in m? b) What is in meters/second the maximum speed of the oscillating object? Answer in meters/seconds . c) Find in meters/...

**Math**

A plane is flying on a course with a vector of <250, 100>, where the 250 is the speed due north, and the 100 is the speed due east. The wind is blowing <25, 5> where the directions are also north and east, in the same order. How fast is the plane flying? All values...

**Meteorology/ Natural Hazards**

Determine the epicenter of an earthquake from the seismographic data below: Time of wave arrival p wave s wave San Francisco 13:03:21 13:06:04 Dallas 12:04:34 12:05:59 New York City 12:24:54 12:29:50 P wave Speed 5.5 km/sec S wave Speed 3.5 km/sec where Z is time Zulu (GMT). -...

**Engineering**

A 10.0 Kg block is released from point A in the figure below. The block travels along a smooth frictionless track. It makes a collision with stationary 10 kg ball. The ball moves forward with speed of 2 m/s. a) What is the speed of the block at point C? b) What is the velocity...

**Physics**

An electron is accelerated from rest through a potential difference that has a magnitude of 2.70 × 107 V. The mass of the electron is 9.11 × 10-31 kg, and the negative charge of the electron has a magnitude of 1.60 × 10-19 C. (a) What is the relativistic kinetic energy (in ...

**physics**

1)As a sound source moves away from a stationary observer, the number of waves will. decrease 2)How fast should a car move toward you for the car's horn to sound 2.88% higher in frequency than when the car is stationary? The speed of sound is 343 m/s. fs(v-vd/v-vs) 343(1/1-987...

**Waves-Science**

I had a couple of questions on the topic of Waves-Sound and Light. 1. What is the source of all waves? *Vibration* 2. In one word, what is it that moves from source to receiver in a wave motion? *Energy* 3. Does the medium in which a wave travels move with the wave? *No* 4. ...

**physics**

A swimmer, capable of swimming at a speed of 1.3 m/s in still water (i.e., the swimmer can swim with a speed of 1.3 m/s relative to the water), starts to swim directly across a 2.2-km-wide river. However, the current is 0.91 m/s, and it carries the swimmer downstream. (a) How ...

**physics**

A swimmer, capable of swimming at a speed of 1.01 m/s in still water (i.e., the swimmer can swim with a speed of 1.01 m/s relative to the water), starts to swim directly across a 1.47-km-wide river. However, the current is 1.01 m/s, and it carries the swimmer downstream. (a) ...

**physics**

A swimmer, capable of swimming at a speed of 1.81 m/s in still water (i.e., the swimmer can swim with a speed of 1.81 m/s relative to the water), starts to swim directly across a 2.29-km-wide river. However, the current is 1.31 m/s, and it carries the swimmer downstream. (a) ...

**physics**

A swimmer, capable of swimming at a speed of 1.18 m/s in still water (i.e., the swimmer can swim with a speed of 1.18 m/s relative to the water), starts to swim directly across a 2.16-km-wide river. However, the current is 1.19 m/s, and it carries the swimmer downstream. (a) ...

**math**

You commute 56 miles one way to work. The trip to work takes 10 minutes longer than the trip home. Your average speed on the trip home is 8 miles per hour faster. What is your average speed on the trip home?

**algebra**

during the first part of a trip a canoeist travels 64 miles at a certain speed. the canoeist travels 11 miles on the second part of the trip at a 5 mph slower. the total time for the trip is 2 hrs. what speed on each part of the trip

**physics**

An object is moving to the right at a speed of 4 m/s. Four forces(10N North, 10N South, 20N Left, 20N Right) are applied to the object at the same time. What will be the object's speed in m/s after the forces are applied?

**physics**

An object is moving to the right at a speed of 4 m/s. Four forces(10N North, 10N South, 20N Left, 20N Right) are applied to the object at the same time. What will be the object's speed in m/s after the forces are applied?

**math**

A rowing team rowed an average of 17.2 miles per hour with the current and 10.4 miles per hour against the current. Determine the team's rowing speed in still water and the speed of the current I need help fast. anyone?

**Algebra**

A raft was sent away from point A downstream. A patrol-boat left A 5 hour and 20 min later and caught up with the raft 20 km away from point A. What was the speed of the raft if the speed of the patrol-boat was 12 km/hour? Reiny, I know you did this but it wasn't right

**physics**

a boy is running on a straight road.He run towards north in 2 minutes and 10 seconds and then turn back and runs 200m in one minute.Calculate his average speed and magnitude of average velocity during first 2 minutes and 10 seconds and his average speed and magnitude of ...

**Physics**

A 79.0-kg fullback running east with a speed of 4.00 m/s is tackled by a 93.0-kg opponent running north with a speed of 3.00 m/s. (a) Why does the tackle constitute a perfectly inelastic collision? (b) Calculate the velocity of the players immediately after the tackle. ...

**college physics**

A 0.384 kg puck, initially at rest on a horizon- tal, frictionless surface, is struck by a 0.189 kg puck moving initially along the x axis with a speed of 2.7 m/s. After the collision, the 0.189 kg puck has a speed of 1.7 m/s at an angle of 28 to the positive x axis. ...

**physics**

A bullet of mass 4.7 g is fired horizontally into a 2.4 kg wooden block at rest on a horizontal surface. The coefficient of kinetic friction between block and surface is 0.28. The bullet stops in the block, which slides straight ahead for 2.2 m (without rotation). (a) What is ...

**Physics**

Suppose you throw a stone straight up with an initial speed of 15.00 m/s If you throw a second stone straight up 1.00s after the first, with what speed must you throw the second stone if it is to hit the first at a height of 11.0?

**physics**

A dart leaves the barrel of a blowgun at a speed v. The length of the blowgun barrel is L. Assume that the acceleration of the dart in the barrel is uniform. If the darts exit speed is 17 m/s and the length of the blowgun is 1.10 m, find the time the dart is in the barrel.

**Physics (Help Please)**

An astronaut of mass 84.0 kg is taking a space walk to work on the International Space Station. Because of a malfunction with the booster rockets on his spacesuit, he finds himself drifting away from the station with a constant speed of 0.570 m/s. With the booster rockets no ...

**College Physics**

An astronaut of mass 84.0 kg is taking a space walk to work on the International Space Station. Because of a malfunction with the booster rockets on his spacesuit, he finds himself drifting away from the station with a constant speed of 0.570 m/s. With the booster rockets no ...

**Math word problem**

Erik bicycles 32 km/h with no wind. Against the wind he bikes 33 km in the same time it takes to bike 63 km with the wind. What is the speed of the wind? I don't understand any of the responses. You have to assume in this case the wind retards and assists with the same force, ...

**physics**

A girl throws a water-filled balloon at an angle of 50.0 degree(s) above the horizontal with a speed of 12.0 m/s. The horizontal component of the balloon's velocity is directed toward a car that is approaching the girl at a constant speed of 8.00 m/s. (See figure) (a) If the ...

**physics**

A girl throws a water-filled balloon at an angle of 50.0∘^\circ above the horizontal with a speed of 12.0m/s{\rm m}/{\rm s} . The horizontal component of the balloon's velocity is directed toward a car that is approaching the girl at a constant speed of 8.00m/s{\rm m}/{\...

**Physic help **

A disk of radius 30 cm is spinning about it axis at 60rmp it deacelerate at a constant rate of 2.0 rad/s^2 until it reaches 20 rpm A find the initial and final angular speed in radians per sec B fine the time it takes to deacelerate from the initial to the final angular speed ...

**Math**

Trigonometry Problem: The good ship Bravery is 30 km due west of the good ship Courageous. The Bravery sets out on a bearing of 030° at a speed of 20km/hr. The Courageous sets out on a bearing of 345° at a speed of 25km/hr. Will the ships collide?

**math**

A kayaker paddles across a river at a constant speed of 4 miles per hour and a bearing of N 60 degrees E. Which current vector results in the kayaker's actual speed being 5.9 miles per hour and the kayakers actual direction being N 70 degrees E.

**physics**

A 63-kg ice-skater glides with a speed of 10 m/s toward a 14-kg sled at rest on the ice. The ice-skater reaches the sled and holds on to it. The ice-skater and the sled then continue sliding in the same direction in which the ice-skater was originally skating. What is the ...

**Physics**

You're an investigator for the National Transportation Safety Board, examining a subway accident in which a train going at 80km/h collided with a slower train traveling in the same direction at 20km/h . Your job is to determine the relative speed of the collision, to help ...

**physics**

Three guns are aimed at the center of a circle,and each fires a bullet simultaneously. The directions in which they fire are 120 degrees apart. Two of the bullets have the same mass of 4.50*10^-3 kg and the same speed of 324 m/s. The other bullet has an unknown mass and a ...

**physic**

Consider a rocket in space that ejects burned fuel at a speed of 1.5 km/s with respect to the rocket. The rocket burns 9 % of its mass in 310 s (assume the burn rate is constant). (a) What is the speed of the rocket after a burn time of 155.0 s? (suppose that the rocket starts...

**Physics**

Consider a rocket in space that ejects burned fuel at a speed of vex= 2.0 km/s with respect to the rocket. The rocket burns 8 % of its mass in 300 s (assume the burn rate is constant). (a) What is the speed v of the rocket after a burn time of 150.0 s? (suppose that the rocket...

**Physics**

The electrons that produce the picture in a TV set are accelerated by a very large electric force as they pass through a small region in the neck of the picture tube. This region is 1 cm in length, and the electrons enter with a speed of 1 × 105 m/s and leave with a speed of ...

**Physics**

A motorcycle is following a car that is traveling at constant speed on a straight highway. Initially, the car and the motorcycle are both traveling at the same speed of 19.0m/s , and the distance between them is 52.0m . After t1 = 5.00s , the motorcycle starts to accelerate at...

**Physics**

A motorcycle is following a car that is traveling at constant speed on a straight highway. Initially, the car and the motorcycle are both traveling at the same speed of 19.0m/s , and the distance between them is 52.0m . After t1 = 5.00s , the motorcycle starts to accelerate at...

**math**

A and B are twos 360 km apart. An express bus departs from A at 8 a.m. and maintains an average speed of 90 km/h between A and B. Another bus starts From B also at 8.m. and moves towards A making four stops at four equally spaced points between B and A. Each stop is of ...

**Math**

Cho is driving a car. He gets to his destination, which is 72 miles away, in 1 hour and 30 minutes. a. The equation d=rt can be used to model Cho's drive, where d us the distance traveled, r is the speed of the car and, and t is the amount of time spent traveling. Substitute ...

**physics**

A speeder traveling at a constant speed of 117 km/h races past a billboard. A patrol car pursues from rest with constant acceleration of (7.6 km/h)/s until it reaches its maximum speed of 175 km/h, which it maintains until it catches up with the speeder.(a) How long does it ...

**Math Calc**

John was wondering at what speed an arrow leaves a bow when it is released. So he went to a field and shot the bow at an angle of 45 degrees. The arrow hit the ground at a distance of 600 feet. Ignore air resistance. For simplicity, assume that the arrow is released at an ...

**physics**

An electron is traveling at 1% the speed of light. what is its kinetic energy in joules? (Speed of light= 3x 10 to the exponent of 8 m/s) a. 4.000 x 10-18 (exponent of -18) b. 4.098 x 10 (exponent of -18) c. 4.098 x 10 (exponent of 10) d. 4.000 x 10 (exponent of 18)

**trig**

a state trooper is hidden 30ft. from a highway. One second after a truck passes, the angle beta between the highway and the line of ovservation from the patrol car to the the truck is measured. if the speed limit is 55mph and a speeding ticket is issued for speeds of 5mph or ...

**physics**

Two automobiles of equal mass approach an intersection. One vehicle is traveling with velocity 15.5 m/s toward the east and the other is traveling north with speed v2i. Neither driver sees the other. The vehicles collide in the intersection and stick together, leaving parallel...

**physics please HELP !**

Which situations are examples of a particle with a non-zero acceleration? (Select all that are true for full credit.) a)A car driving around a circular track at constant speed. b)A child going back and forth on a swing c)A runner moving in a straight line with a constant speed...

**physics**

A space vehicle is traveling at 4100 km/h relative to Earth when the exhausted rocket motor is disengaged and sent backward with a speed of 76 km/h relative to the command module. The mass of the motor is four times the mass of the module. What is the speed (in km/h) of the ...

**Physics**

A space vehicle is traveling at 5260 km/h relative to Earth when the exhausted rocket motor is disengaged and sent backward with a speed of 89 km/h relative to the command module. The mass of the motor is four times the mass of the module. What is the speed (in km/h) of the ...

**physics**

As you hurry to catch your flight at the airport, you encounter a moving walkway that is 85m long and has a speed of 2.2 m/s relative to the ground. If it takes you 68s to cover 85m when walking on the ground, how long will it take you to cover the same distance on the walkway...

**Math**

A small plane flying into the wind takes 3h 20 min to complete a flight of 960 km.Flying with the wind, the same plane takes 2h 30 min to make the trip. What is the speed of the plane? What is the speed of the wind? can you plz help thx I really am thankful to have found a ...

**physics**

suppose a simple pendulum was released from an angle of 58 degrees, with a length of 0.75m and mass of .15kg. what would be the speed of the bob at the bottom of the swing? To what height would the bob get to on the other side. What angle of release would give half the speed ...

**Math**

Can someone show me how to solve these questions. A plane is is flying 240 mph heading N60°E. The wind is blowing S30°E at 30 mph. 6. What is ground speed of the plane? The ground speed of the plane is 266.40. 7. What is the smallest angle in the triangle? 8. ...

**physics**

For a particle undergoing rectilinear motion with uniform acceleration, the magnitude of displacement is one third the distance covered in some time interval. The magnitude of final velocity is less than magnitude of initial velocity for this time interval. Then the ratio of ...

**time speed and distance**

a cat on seeing a dog 100 m away turns around and start running away at 24 kmph. the dog spots him one minute later and start chasing the cat at a speed of 33 kmph. after how much time from the start of the cat's run will the chase end

**physics**

A hawk ﬂies in a horizontal arc of radius 15.7 m at a constant speed of 3.8 m/s. Find its centripetal acceleration. Answer in units of m/s 2 006 (part 2 of 2) 10.0 points It continues to ﬂy along the same horizontal arc but increases its speed at the rate of 1.13...

**PHYSICS (please help)**

A solid, uniform disk of radius 0.250 m and mass 51.1 kg rolls down a ramp of length 4.60 m that makes an angle of 18° with the horizontal. The disk starts from rest from the top of the ramp. a)Find the speed of the disk's center of mass when it reaches the bottom of the ramp...

**physics**

In the movie Spiderman 2, there's a famous minute long scene where Spiderman stops a train. If the initial speed of a five car out of control subway train was around the top speed of the NYC subway (27 m/s), and Spiderman stopped the train in exactly one minute, then what is ...

**Math**

Mrs Leong took 1 hour to drive 1/5 of a journey from village R to village S.she drove the remaining 180km in 4hr. A) what was Mrs Leong's speed for the first part of the journey? B) how long did she take to travel the whole journey? C) find Mrs Leong's average speed for the ...

**Physics**

A 4kg box is attached to a 2.4m rope rotating on platform. Max tension can withstand without breaking is 140N. 1.) Find Max. speed w/ which the box can rotate if the surface of platform is frictionless. 2.) Find Max speed w/ which box can rotate if Coeff. of friction between ...

**science-physics**

A swimmer, capable of swimming at a speed of 1.97 m/s in still water (i.e., the swimmer can swim with a speed of 1.97 m/s relative to the water), starts to swim directly across a 2.77-km-wide river. However, the current is 1.13 m/s, and it carries the swimmer downstream. (a) ...

**Physics**

A stone is dropped from rest from the roof of a 100-m high building; 2.00 s after that, a second stone is thrown straight down with initial speed v0, and the second stone passes the first stone 21.6 m above ground. (a) When are the stones at the same height? (b) What was the ...

**Physics**

A swimmer, capable of swimming at a speed of 1.44 m/s in still water (i.e., the swimmer can swim with a speed of 1.44 m/s relative to the water), starts to swim directly across a 2.21-km-wide river. However, the current is 0.840 m/s, and it carries the swimmer downstream. (a) ...

**PHYSICS**

A swimmer, capable of swimming at a speed of 1.24 m/s in still water (i.e., the swimmer can swim with a speed of 1.24 m/s relative to the water), starts to swim directly across a 2.24-km-wide river. However, the current is 0.553 m/s, and it carries the swimmer downstream. (a) ...

**science**

an electron is projected horizontally at a speed of 3x10^6 m/s into a uniform electric field 200 N/C produced by two charged plates of width 0.1m (a) find the a cceleration of the electron in the elec field.(b) finn the time takes to travel through the electric field.(c) what ...

**physics**

An electron is projected horizontally at a speed of 3x10^6 m/s into a uniform electric field 200 N/C produced by two charged plates of width 0.1m (a) find the a cceleration of the electron in the elec field.(b) finn the time takes to travel through the electric field.(c) what ...

**Physics**

At t = 0, an automobile traveling north begins to make a turn. It follows one-quarter of the arc of a circle of radius 10.9 m until, at t = 1.56 s, it is traveling east. The car does not alter its speed during the turn. Find the car's speed. Find the change in its velocity ...

**physics**

At t = 0, an automobile traveling north begins to make a turn. It follows one-quarter of the arc of a circle of radius 9.3 m until, at t = 1.38 s, it is traveling east. The car does not alter its speed during the turn. (a) Find the car's speed. (b) Find the change in its ...

**physics**

At t = 0, an automobile traveling north begins to make a turn. It follows one-quarter of the arc of a circle of radius 10.1 m until, at t = 1.64 s, it is traveling east. The car does not alter its speed during the turn. (a) Find the car's speed. (b) Find the change in its ...

**Physics**

A police car stopped at a set of lights has a speeder pass it at 100 km/h. If the police car can accelerate at 3.6 m/s2, a) how long does it take to catch the speeder? b) how far would the police car have to go before it catches the speeder? c) what would its speed be when it ...

**physics**

The pulley in the figure represents different pulleys with outer radius and inner radius indicated in the table. The horizontal rope is pulled to the right at a constant speed that is the same in each case, and none of the ropes slips in its contact with the pulley Rank these ...

**physic**

hi,need help please.thank. A car is designed to get its energy from a rotating flywheel (solid disk) with a radius of 2.00 m and a mass of 525 kg. Before a trip, the flywheel is attached to an electric motor, which brings the flywheel's rotational speed up to 4000 rev/min. (a...

**pre calc**

I am sooo confused on my homework. #1 Two cars lave an intersection at the same time. One is headed south at a constant speed of 30mph. the other is heading west at a constant speed of 40mph. Build a model that expresses the distance (d) between thec ars as a funtion of time (...

**Physics 12**

This came up on our test review for tomorrow, and I'm stumped! "A hockey puck of mass 0.51 kg is moving north across the ice with a speed of 32 m/s. If it is hit with a hockey stick so as to make it travel due west at the same speed, what is the magnitude of the impulse ...

**Physics please help**

TIgers pitcher justin throws a basketball staright upward 29.0m/s. Calculate A) the height to which the ball will rise b) the time it takes to reach the highest point c) the speed with which it will return to the same height which it was thrown d) the speed of the ball 2.50s ...

**Precalculus**

I tried doing this problem, but I still don't understand it at all... Pilot Reem Ahmad's flight plan has her leaving Dulles International Airport and flying a Boeing 727 due east at 450 mph. There is a 65 mph wind with the bearing 60 degrees. a. Determine the compass heading ...

**physics**

Small, slowly moving spherical particles experience a drag force given by Stokes’ law: where r is the radius of the particle, is its speed, and η is the coefficient of viscosity of the fluid medium. (a) Estimate the terminal speed of a spherical pollution particle of ...

**physics**

Small, slowly moving spherical particles experience a drag force given by Stokes’ law: where r is the radius of the particle, is its speed, and η is the coefficient of viscosity of the fluid medium. (a) Estimate the terminal speed of a spherical pollution particle of ...

**Physics**

A flute is designed to play middle C (262 Hz) as the fundamental frequency when all the holes are covered. The length of the flute is 0.655 m. Assume the air temperature is 20°C. How far from the end of the flute should the hole be that must be uncovered to play F above ...

**Physics**

An observer stands 43.0 m behind a marksmen practicing at a rifle range. The marksman fires the rifle horizontally which gives the speed of the bullet to be 939 m/s. How far does each bullet travel before the observer hears the report of the rifle? Assume that the bullet ...

**Physics Conducting Spheres**

1. Two concentric conducting spherical shells have radii of 0.145 m. and 0.215 m. The inner sphere bears a charge of -3.00E-08 C. An electron escapes from the inner sphere with negligible speed. Assuming that the region between the spheres is a vacuum, compute the speed (in ...

**physics**

A car is traveling at 25m/s when an accident occurs. The car decelerates 300m/s^2 but the passenger does not slow down because he is not wearing a seatbelt. a) Supposing the distance between the passenger and the dashboard is initially 0.50m, what will be the speed of the car ...

**Physic**

In a dramatic lecture demonstration, a physics professor blows hard across the top of a copper penny that is at rest on a level desk. By doing this at the right speed, he can get the penny to accelerate vertically, into the airstream, and then deflect it into a tray. Assuming ...

**Physics**

A 0.38-kg particle has a speed of 2.0 m/s at point A and kinetic energy of 7.5 J at point B. (a) What is its kinetic energy at A? J (b) What is its speed at point B? m/s (c) What is the total work done on the particle as it moves from A to B?

**Physics please clarify**

The potential at location A is 379 V. A positively charged particle is released there from rest and arrives at location B with a speed vB. The potential at location C is 789 V, and when released from rest from this spot, the particle arrives at B with twice the speed it ...

**physics**

A pitcher claims he can throw a 0.146 kg baseball with as much momentum as a 3.37 g bullet moving with a speed of 15238 m/s. What must be its speed if the pitcher’s claim is valid? Answer in units of m/s What is the kinetic energy of the bullet? Answer in units of J What is ...

**General Physics**

A 0.377 kg bead slides on a curved wire, starting from rest at point A(4.8 meters) as shown in the figure. The acceleration of gravity is 9.8 m/s2 . A. If the wire is frictionless, find the speed of the bead at B(0 Meters). Answer in units of m/s B. Find the speed of the bead ...

**Physics**

A resting eagle on a tree top finds a rabbit on the ground at a distance of 50 m from the base of the tree. The eagle applies a constant horizontal speed and uses gravity to descend. It catches the rabbit in 2.5 seconds. a. What is the height of the tree top? b. What is the ...

**Physics**

An archer fires an arrow, which produces a muffled "thwok" sound after it hits a target. If the archer hears the "thwok" exactly 1.2 s after firing the arrow and the average speed of the arrow was 48 m/s, what was the distance separating the archer and the target? Use 340 m/ s...

**algebra**

Andy’s average driving speed for a 4-hour trip was 45 miles per hour. During the first 3 hours he drove 40 miles per hour. What was his average speed for the last hour of his trip?

**physics**

Satellite A orbits a planet with a speed of 10,000 m/s. Satellite B is twice as massive as satellite A and orbits at twice the distance from the center of the planet. What is Satellite B's speed?

**Math**

Pete and jan compete as a team in a biathlon. Pete runs at a speed of 9 km/ h for x hours. Jan cycles at twice Pete's running speed for 1 hour and 30 minutes. The total distance of the biathlon is 42 km. Find, in hour and minutes, Pete's running time.

**Math**

two boats leave the same port at the same time. one travels at a speed of 29 mph in the direction N 50 degrees E and the other travels at a speed of 35 mph in the direction S 70 degrees E. how far apart are the two boats after an hour.

**Word Problems**

I have two questions: Inflation is currently causing the cost of items to increase by about 2.5% per year. In 2009 a litre of gasoline costs approximately $0.90. What will it cost to fill a 60 litre gas tank 10 years from now? Round your answer to the nearest dollar. Name at ...

**Trig Circular Motion**

A es004-1.jpginch circular saw blade rotates at 5200 revolutions per minute. a) Find the angular speed of the saw blade in radians per minute. b) Find the linear speed in feet per minute of one of the 24 cutting teeth as they contact the wood being cut.

**Physical Education**

Suppose that blood flows through the aorta with a speed of 0.35 m/s. The cross-sectional area of the aorta is 2.0x10-4 m2. (a) Find the volume flow rate of the blood (b) The aorta branches into tens of thousands of capillaries whose total cross-sectional area is about 0.28 m2...

**physics**

quick answer of a boy is running on a straight road.He run towards north in 2 minutes and 10 seconds and then turn back and runs 200m in one minute.Calculate his average speed and magnitude of average velocity during first 2 minutes and 10 seconds and his average speed and ...

**physics**

A baseball (m = 149 g) approaches a bat horizontally at a speed of 39.8 m/s (89.0 mph) and is hit straight back at a speed of 45.8 m/s (102 mph). If the ball is in contact with the bat for a time of 1.27 ms, what is the average force exerted on the ball by the bat? Neglect the...