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Assume some dog tags create a sound with a frequency of 1118 Hz at rest. You place these dog tags on a greyhound dog. The dog runs towards you and moves with a speed of 13.7 m/s with her tags clanging together.
a) What is the frequency that you hear of the sound created with the dog tags? (The speed of sound in air is 344 m/s.)
A rocket ship is 80m in length when measured before leaving the launching pad. what would its velocity be if a ground observer measured its length as 60m while it is in flight
a hollow aluminum cylinder 24.0 cm deep has an internal capacity of 2.000 l at 21.0degc. it is completely filled with
q1. two boats start together and race across a 46 km-wide lake and back. boat a goes across at 60 kmh and returns at 60
A double-slit experiment using light of wavelength 580.nm produces an interference pattern on a screen. The slit separation is 1.39?10?2mm. find the distance between the slits and the screen
A 0.8 kg object that stretches a spring 7.3 cm from its natural length when hanging at rest oscillates with an amplitude of 7.3 cm. Find the total energy of the system. The acceleration due to gravity is 9.81 m/s2. Find the gravitational potential en..
A cannonball is fired at 100m/s at 30o from the top of a 600 meter cliff. Find its range when the projectile land
Julie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial speed of 17.0 m/s at an angle 33.0 degrees; What is the distance between the two girls
Two charged particles are located on the x axis. The first is a charge +Q at x = -a. The second is an unknown charge located at x = +3a, What are the two possible values of the unknown charge
A hockey puck with mass 0.160kg is at rest on the horizontal, frictionless surface of a rink. What is the position of the puck at the end of that time
Two boats are heading away from shore. Boat 1 heads due north at a speed of 3.2 m/srelative to the shore. Relative to boat 1, boat 2 is moving 40°north of east at a speed of 1.5 m/s.
Gas lanterns used on camping trips have mantles (small lacy bags that give off light) made from a rayon mesh impregnated with thorium, A typical mantle contains 345 mg of thorium. What is the activity of the mantle
A point charge of 20nC is placed on the x-axis at the point x = 2. Find the x-component of the electric field Ex at x = 4 and x = -1 where the coordinates are in meters
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