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A projectile with a mass of 9.10 g is traveling at a speed of 1.10 km/s, determine the following.
1. Kinetic energy of the projectile in kilojoules: ________ kJ
2. Kinetic energy of the projectile in kilojoules, if its speed is reduced with a factor of two: __________ kJ
3. Kinetic energy of the projectile in kilojoules, if it original speed is increased by a factor of three: ________ kJ
A person is standing on and facing the front of a stationary skateboard while holding a construction brick. The mass of the person is 70.0 kg, determine the recoil speed of the person and the skateboard
A 171 kg block of ice at 0.0°C is placed in a large lake. The temperature of the lake is just slightly higher than 0.0°C, and the ice melts very slowly, What is the entropy change of the universe
A paratrooper is initially falling downward at a speed of 33.0 m/s before her parachute opens. How far does the paratrooper fall during this time interval
A parachutist leaves a stationary plane and free falls for 50.0 meters (ignore air resistance for the free fall). At what height did she leave the plane
The train on the right accelerates leftward at 0.82 m/s2.How far does train on the left travel before the front ends of the trains pass.
A 5.6 kg block hangs from a spring with spring constant 1840 N/m. The block is pulled down 4.1cm from the equilibrium position, What is the total mechanical energy of the motion
Helium (He), a monatomic gas, fills a 0.012 m3 container. The pressure of the gas is 6.90x 10^5 Pa. How long would a 0.25 hp engine have to run (1 hp = 746 W) to produce an amount of energy equal to internal energy of this gas.
A car drives north at 46 for 10 and then turns east and goes 5 at 60. At last, it goes southwest at 30 for 6.0. What is the average velocity.
A sled weighing 200 N is held in place by static friction on a 15? incline, What is the coefficient of static friction between the sled and the incline
Consider a spherical conducting shell where the conductor has a netcharge Q on it with no charges in the cavity. Does the voltage varywithin the cavity from place to place? Explain why or why not.
A helicopter is ascending vertically with a speed of 5.20m/s. at a high of 125m above the earth, a package i dropped from a window. How much time does it take for the package to reach the ground? (Hint: the package's initial speed equals helicopte..
A negative charge of -2.0 multiplied by 10-4 C and a positive charge of 9.5 multiplied by 10-4 C are divided by 0.30 m. What is the force between the two charges.
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