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A 55 kg person jumps from rest of a 10 m high tower straight down into the water. neglect air resistance during the descent. she comes to rest 3 m under the surface of the water. determine the aver
A force of 315 N is applied horizontally to a wooden crate in order to displac eit 35.0 m accorss a level surface at a constant velocity. As a result of this work the crate's internal energy is inc
How long will it take her to reach the bottom of the hill, assuming she starts from rest and accelerates uniformly, if the elevation change is 250 ?
A tank having a volume of 0.100 m3 contains helium gas at 140 atm. How many balloons can the tank blow up if each filled balloon is a sphere 0.300 m in diameter at an absolute pressure of 1.10 atm?
A typical human aorta, or main artery from the heart, is 1.8 cm in diameter and carries blood at a speed of 35 cm/s. The clot reduces the flow area by 80%? If the blood pressure in the unobstructed
A 75. kg child stands on the rim of a merry go round. The merry go round has a mass of 250. kg, and a diameter of 6 meters. The merry go round has an angular speed of 3.00 rad/s. What is the minimum
A hunter wishes to cross a river that is 1.1 km wide and flows with a speed of 5.0 km/h parallel to its banks. The hunter uses a small powerboat that moves at a maximum speed of 11 km/h with respect
An electron travels with speed 1.8 107 m/s between the two parallel charged plates shown in the figure below. The plates are separated by 1.0 cm and are charged by a 160 V battery. What magnetic fie
A rifle is aimed horizontally at a target 45 m away. The bullet hits the target 2.5 cm below the aim point. What is the bullet's flight time and the speed as it left the barrel?
A 12 g bullet traveling 224 m/s penetrates a 2.0 kg block of wood and emerges going 166 m/s. If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet eme
A train on a straight, level track has an initial speed of 47.0 km/h. A uniform acceleration of 1.50 m/s2 is applied while the train travels 165 m. What is the speed of the train at the end of this
Water discharges from a horizontal cylindrical pipe at the rate of 484 {rm cm^{3}/s}. At a point in the pipe where the radius is 2.02 {rm cm}, the absolute pressure is 1.70×105 {rm Pa}. What
A simple pendulum makes 121 complete oscillations in 3.0 min at a location where g = 9.80 m/s2. (a) Find the period of the pendulum.
What will be the equilibrium temperature when a 244 block of copper at 268 is placed in a 136 aluminum calorimeter cup containing 845 of water at 14.0?
For a hammer dropped on earth, the initial gravitational potential energy is 60.0 {rm J}. What would be the initial gravitational potential energy for the hammer on the moon (where the acceleration
A 60 meteorite buries itself 6.0 into soft mud. The force between the meteorite and the mud is given by = (750 ), where is the depth in the mud. What was the speed of the meteorite when it initially
If the window is 14 m above the ground, find the time the stone is in flight and Find the speed of the stone just before it hits the ground.
What is the uncertainty in the position of an electron if it is moving with a speed of 2.05 * 10 6 m/s and the momentum is measured with a precision of 0.5%.
A jet plane lands with a speed of 101 m/s and can accelerate at a maximum of -5.00 m/s^2 as it comes to rest. What is the actual minimum distance needed to stop the plane?
Two small metal spheres with masses 2.0 g and 4.0 g are tied together by a 5.5 cm--long massless string and are at rest on a frictionless surface. Each is charged to +2.5uC .
he moves an additional 0.76 m before coming to rest. Treating our rigid legged friend as a particle, what is the average force his feet exert on the ground while he slows down?
A thing, rigid, spherical shell with a mass of 4.00 kg and diameter of 0.200 m is filled with helium at 0 degrees celsius and 1 atm pressure. It is then released from rest on the bottom of a pool o
A subway train starts from rest at a station and accelerates at a rate of 1.60;{rm m}/{rm s}^{2} for 14.0 {rm s}. Find the total distance covered.
Draw arrows showing the ball's momentum before and after it hits the bat. What was the change in momentum of the ball? What was the impulse delivered by the bat?
A raft is made of 10 logs lashed together. Each is 56cm in diameter and has a length of 6.1m. How many people can the raft hold before they start getting their feet wet, assuming the average person