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A train is traveling up a 4.1 degrees incline at a speed of 2.45 m/s when the last car breaks free and begins to coast without friction. How far did the last car travel before momentarily coming to
A 0.22 m(micro)F capacitor by a 1.5-V battery. After being charged, the capacitor is connected to a small electric motor. Assuming 100% efficiency. A) to what height can the motor lift a 5.0-g mass?
From the chart of the nuclides, for each of the two decay transitions what are the parent and daughter nuclides, the atomic mass numbers and atomic numbers, the modes of decay and energies, and the
A 9.45 kg projectile is fired vertically upward. Air drag decreases the mechanical energy of the projectile-Earth system by 69.0 kJ during the projectile's ascent. How much higher would the projecti
A 0.22 m(micro)F capacitor by a 1.5-V battery. After being charged, the capacitor is connected to a small electric motor. Assuming 100% efficiency.
A ball is kicked at an angle of 30 degrees with a velocity of 10 m/s. What is its maximum height? What is its velocity at maximum height? What is its velocity vector where the ball lands? Plot: x (t
How much radioactive material 99mTc would you need to ship from a supplier of radio pharmaceuticals if you need a dose of 4mCi for a patient at 3:00pm and it takes five (5) hours to get the material
A child is twirling a 0.0132 kg ball on a string in a horizontal circle whose radius is 0.106 m. The ball travels once around the circle in 0.490 s. (a) Determine the centripetal force acting on the
A 2.65 g bullet moving at 896 m/s penetrates a tree to a depth of 4.55 cm. Use energy considerations to find the average frictional force that stops the bullet.
At one instant the outer wall moves at a speed of 3.9 m/s, and an 83 kg person feels a 535 N force pressing against his back. What is the radius of the chamber?
A Boy standing on the roof throws one ball upward and another one downward with same initial speed. how do the final speeds of the two balls at the moment when they hit the ground? Explain.
Two billiard balls of equal mass undergo a perfectly elastic head-on collision. If the speed of ball 1 was initially 3.00 m/s, and that of ball 2 was 4.00 m/s in the opposite direction, what will b
A 2100 kg truck traveling north at 41 km/h turns east and accelerates to 51 km/h. (a) What is the change in the truck's kinetic energy? What are the (b) magnitude and (c) direction of the change in
Two forces act on a moving object that has a mass of 27 kg. One has a magnitude of 12 N and points due south, while the other has a magnitude of 17 N and points due west. What is the acceleration (m
You place the spring vertically with one end on the floor. You then drop a book of mass 1.10 kg onto it from a height of 0.800m above the top of the spring. Find the maximum distance the spring will
In what way does the potential of a body differ from its potential energy? (Express in terms that are applicable to situations that involve electric and gravitational fields.) Why is the concept of
A 1.2 kg ball drops vertically onto a floor, hitting with a speed of 25 m/s. It rebounds with an initial speed of 10 m/s. (a) What impulse acts on the ball during the contact?
A (light) pallet has a load of cases of tomato paste each of which is a cube of length l and has identical mass. Find the center of gravity in the horizontal plane, so that the crane operator can pi
The W weight of a box on an inclined plane can be resolved in two vectors components. one pararell to the plane and the othe perpendicular to it .
An old phonograph record accelerates from rest to a final angular velocity of 78.0 rpm (revolutions per minute) in 0.350 s. The record has a radius of 15.0 cm. a. Express the final angular velocity
Find the coordinates of the center of mass and apply you know about finding center of mass to each rock independently.
A bicycle with 0.80m -diameter tires is coasting on a level road at 5.6m/s. A small blue dot has been painted on the tread of the rear tire. What is the speed of the blue dot when it is 0.80 m and
A 10 microFarad capacitor is charged to 100,000 volts. the electrostatic energy in this capacitor is used to heat 5 grams of water. What voltage is required if instead a 43 microfarad C? what is re
A 50.0 kg crate rests on the floor. A boy pulls on a rope attached to the crate. The rope makes an angle of 60.0° to the horizontal and the boy applies a force of 25.0 newtons to the rope.Calcul
A charge of 3.05 m(micro)C is held fixed at the origin. A second charge of 3.05 m(micro)C is released from rest at the position (1.25m, 0.570m) a) If the mass of the second charge is 2.16g what is i