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When an ambulance is stationary, the siren gives off a sound at a frequency of 500 Hz. In answering the following questions assume that the speed of sound is 340 m/s. What is the frequency of the stationary siren as perceived by an observer in a car driving toward the ambulance at 25 m/s?
A ship sets out to sail to a point 148 km due north. An unexpected storm blows the ship to a point 148 km due east of its starting point. (a) How far (in km) and (b) in what direction (as an angle from due east, where north of east is a positive angl..
Two gliders are positioned on an air track, M1 and M2. M2 is stationary and M1 is then pushed down the track and collides with M2. They stick together and continue down the track.
How long did it take for a message sent from Earth to reach the first astronauts on the way to the moon when they were still 12100 km away from the moon
A uniform plank of length 4.9m and weight 228N rests horizontally on two supports, with 1.10m of the plank hanging over the right support. To what distance x can a person who weighs 449N walk on overhanging part of the plank before it just begins ..
An object with total mass mtotal = 16.7 kg is sitting at rest when it explodes into three pieces. Calculate the increase in kinetic energy of the pieces during the explosion
THe Voyager one has a 20-W radio transmitter and is expected to transmit to 2025 when it is 25 billion km from the earth. WHat's the Diameter of a dish antenna
Halley's comet moves about the Sun in an elliptical orbit, with its closest approach to the Sun being 0.59 A.U. what is its speed when it is farthest from the Sun
A 120-V rms voltage at 60.0 Hz is applied across an inductor, capacitor and a 100-? resistor in series. what is the rms value of the current in this circuit
question 1consider a long straight conducting wire that terminates in a metal sphere of radius r 050 plusmn 001 cm.
an object with the dimensions 5.64 cm x 2.97 cm x .92 cm has a mass of 11.5 g. at what depth of the bottom end will the object float
A thin film of oil (n = 1.30) is located on smooth, wet pavement. When viewed perpendicular to the pavement, How thick is the oil film
A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.60 104 m/s, and the radius of the orbit is 5.00 106 m. What is the orbital speed of the second satellite
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