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1. In your own words, explain the meaning of the following terms:
a. Traverse wavesb. Longitudinal wavesc. Standing wavesd. Shock waves
2. Police use Doppler radar to detect speeding cars. Explain how the Doppler effect is used in this application.
3. A person in a cave emits a sound and receives and echo 2.5 seconds later. How far is that person away from the wall?
4. Why do soldiers break step in marching over a bridge?
5. Jet aircraft mechanics wearing ear protectors are able to converse with each other because the ear protectors block out the sound of the jet engine. What physics concept would account for this?
6. Suppose you call your dog with an average intensity level of 80 decibels (db). How much more sound energy would you have to put into each call to:
a. Increase to 90 db?b. Increase to 100 db?
A particular freely falling object requires 1.95 s to travel the last 33.5 m before it hits the ground. From what height above the ground did it fall.
Two particles are fixed to an x axis: particle 1 of charge-2.99 x 10-7 C is at the origin and particle 2 of charge+2.99 x 10-7 C is at x= 18.0 centimeter. find what is the magnitude of the net electric field
A ball is launched directly upward from the ground level with an initial speed 24 m/s. What is the greats height reached by the ball
Calculate the energy stored in a 60 pF capacitor when it is charged to a potential difference of 2.0Kv
A bale of hay of mass 15.0 kilogram is pulled at a constant velocity across a barn floor by a hook that pulls at an angle of 30o with the horizontal with a force of 30.0 Newton, Find the normal force of the floor on the hay bale
In order to drop a Pyrex glass marble 1.003 in diameter through the hole in the plate, how much must the temperature of the system be raised? (Assume the plate and the marble are always at the same temperature.)
A car traveling 59.6 km/h is 21.4 m from a barrier when the driver slams on the brakes. The car hits the barrier 1.90 s later. What is the car's constant deceleration magnitude before impact
tarzan m 85 kg is trying to swing across a river on a long vine. use angle 40 degrees and l10m. assume that he starts
A small bird's wings can undergo a maximum displacement amplitude of 5.9 cm. what is the oscillation frequency of the wing tips
An object, at the top of a very tall building, is released from rest and falls freely due to gravity. Neglect air resistance and compute distance covered by the object between times t1 = 5.5 s and t2 = 7.9 s after it is released.
A passenger train is travelling at 31 m/s when the engineer sees a freight train 351 m ahead of his train travelling in the same direction on the same track. The freight train is moving at a speed of 5.6 m/s.
a hospital patient has been given 131i half life 8.04 days which decays at 4.5 times the acceptable level for exposure
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