Measurements of the sun distance
Why did Aristarchus make his measurements of the sun's distance at the time of a half moon?
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What is the wavelength of the sound? If the distance between the speakers continues to increase, at what separation will the sound intensity again be a maximum?
When the spring is stretched to a total length of .60 m, it supports traveling waves moving at 4.5 m/s how fast will waves travel on this spring if it is stretched to .90 m.
A truck travels beneath an airplane that is moving 170 km/h at an angle of 51 to the ground. How fast must the truck travel to stay beneath the airplane?
A 110g trick baseball is thrown at 75km/hr . It explodes in flight into two pieces, with a 46g piece continuing straight ahead at 95km/h. How much energy do the pieces gain in the explosion?
A bullet of mass 0.018 kg traveling horizontally at a high speed of 290 m/s embeds itself in a block of mass 4 kg that is sitting at rest on a nearly frictionless surface. What is the speed of the block after the bullet embeds itself in the block?
The index of refraction for red light in water is 1.331 and that for blue light is 1.340. If a ray of white light enters the water at an angle of incidence of 61.05°, what are the underwater angles of refraction for the blue and red components
A car traveling east at 38.0 m/s passes a trooper hiding at the roadside. The driver uniformly reduces his speed to 25.0 m/s in 2.90 s. How far does the car travel in the 2.90-s time period?
A child slides down a slide with a 26° incline, and at the bottom her speed is precisely two-thirds what it would have been if the slide had been frictionless. Calculate the coefficient of kinetic friction between the slide and the child.
You arrive home after driving 2 hours and 40 minutes. How far is your hometown from school? What was your average speed?
A chain mechanism does +5.27 x 104 J of work to help the car up a long climb. What is the change in the car's kinetic energy KEf - KEo from A to B?
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