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Pam, wearing a rocket pack, stands on frictionless ice. She has a mass of 41 kg. The rocket supplies a constant force for 22.0 m, and Pam acquires a speed of 64.5 m/s. Assume that air resistance is negligible.
question1a piece of wire with mass per unit length 78 runs horizontally at right angles to a horizontal magnetic field.
A state highway patrol car radar unit uses a frequency of 9 x 10^9. what frequency difference will the unit detect from a car receding at a speed of 46.5 m/s from stationary patrol car.
a capacitor is charged to a potential of 12.0v and is then connected to a voltmeter having an internal resistance of
A 234.0 g piece of lead is heated to 86.0oC and then dropped into a calorimeter containing 611.0 g of water that initally is at 24.0oC. find the final equilibrium temperature (in oC) of the lead and water
A Ferris wheel, rotating initially at an angular speed of 0.50 rad/s, accelerates over a 6.0-s interval at a rate of 0.040 rad/s2. What is its angular speed after this 6-s interval
How much work must be done to move a 3.8 kg chair 6.1 m acrossthe floor at constant velocity if the coefficient of kineticfriction between the chair and the floor is 0.64
What mass of water at 26.0 °C must be allowed to come to thermal equilibrium with a 1.69-kg cube of aluminum initially at 1.50 102 °C to lower the temperature of the aluminum to 74.6 °C? Assume any water turned to stream subsequently recondenses.
A pion is an unstable particle that has an average lifetime of 2.55 × 10^-8 s. How far does it travel in its lifetime, relative to Earth
Though slow on land, the leatherback turtle holds record for the fastest water speed of any reptile: 9.78 m/s. It is also among the largest of reptiles. Assume the largest leatherback yet discovered were to swim at the top leatherback speed. If its k..
hydrogen sulphide decomposes according to the following reaction for which kc9.30 x 10-8 at 700 degrees c.2h2s
A 70·kg packing crate is pulled with constant speed across a rough floor with a rope that is at an angle of 37.0° above the horizontal. What is the total work done on the box by all forces
A 23g bullet traveling 260 m/s penetrates a 2.7 kg block of wood and emerges cleanly at 205m/s. how fast does it move after the bullet emerges
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