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A car movig with an initial velocity of 29.6 m/s decrease to a velocity of 17.9 m/s over a time interval of 4.08 seconds.
a) what is the average acceleration of the car during this time?
b) assuming the acceleration is constant, how far did the car travel during this time?
A baseball (m = 148 g) approaches a bat horizontally at a speed of 41.5 m/s (93 mi/h) and is hit straight back at a speed of 45.9 m/s (103 mi/h).
a teacher standing in a doorway 1.0 m wide blows a whistle with a frequency of 1000 hz to summon children from the playground. which boy may not hear the whistle
A length of aluminum wire has a resistance of 16.0 ? at 28.0°C. When the wire is warmed in an oven and reaches thermal equilibrium, find the temperature of the oven
A particle lives for a short time before breaking apart into other particles. According to this hypothetical person, how far does the laboratory move before the particle breaks apart
You have 3.0 moles of helium gas initially at a temperature of 350 K, and a pressure of 0.20 x Patm, How much heat flows into the gas
A ping-pong ball of mass 4 gm and traveling with a velocity of 4 m/s collides with stationary tennis ball of mass 5 gm. Calculate the magnitude of the velocity of the tennis ball after the collision
A loundspeaker diaphragm is producing a sound for 2.1 s by moving back and forth in a simple harmonic motion. How many times does the diaphragm move back and forth
A laser is used in eye surgery to weld a detached retina back into place. The wavelength of the laser beam is 511 nm, while the power is 1.5 W. how many photons are emitted by the laser
A 2 200-kg pile driver is used to drive a steel I-beam into the ground. calculate the average force the beam exerts on the pile driver while the pile driver is brought to rest
A small plane is flying directly west with an airspeed of 34.0 m/s. The plane flies into a region where the wind is blowing at 11.0 m/s at an angle of 33° to the south of west. what is the ground speed of the airplane
Suppose we measure the terminal voltage of a rechargeable NiCad battery and find it to be 1.28 V when measured by a voltmeter. calculate the internal resistance of the battery
A parallel-plate capacitor having square plates 4.50cm on each side and 8.00mm apart is placed in series with an ac source of angular frequency 620rad/s, What is the resonance angular frequency of this circuit
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