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A turntable that turns 10 revolutions each second is locatedon top of a mountain. Mounted on the turntable is a laser thatemits a bright beam of light. As the turntable and laser rotate,the beam also rotates and sweeps across the sky. On a dark nightthe beqam reaches some clouds 10 km away.
a) show that the spot of laser light sweeps across teh cloudsat a speed 628 km/s
b) how fast does the spot of laser light sweep across cloudsthat are twice as far away?
c) at what distance will the laser beam sweep across the skyat the speed of light? (speed of light is 300 000 km/s.)
A proton (mass 1.67 × 10 ?27kg) is moving at 1.15 ×10 ?6m/s directly toward a stationary helium nucleus (mass 6.64 × 10 ?27kg). After a head-on elastic collision, what is the helium's velocity
A very light rigid rod with a length of 0.523 m extends straight out from one end of a meter stick. Determine the period of oscillation of the system
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A string with a length of 3.0 m has two adjacent resonances at frequencies 112 Hz and 140 Hz. What is the wavelength of the first harmonic
The magnitude of each force is 204 N, the force on the right is applied at the angle 29 and the mass of the block is 12kg. The coefficient of friction is 0.138. The acceleration of gravity is 9.8 m/s2. What is the magnitude of the resulting accelerat..
Here in Boulder, normal atmospheric pressure is NOT 1 atm (that's down at sea level) Let's call it 0.850 atm on a given day. what is the amplitude of the pressure wave
Given two stars, one emits light with a peak wavelength at 400nm (deep blue to your eye) and one emits with a peak wavelength at 600nm (red). Obtain the temperature of each star
If the only forces acting on a 2.0-kg mass are N and N, what is the magnitude of the acceleration of the particle
An object is located 12.5 cm in front of a convex mirror, the image being 6.90 cm behind the mirror. How far in front of the mirror is the second object located
The current in an RL circuit builds up to one-third ofits steady state value in 5.80 s. Find the inductive time constant
A spaceship travels toward the Earth at a speed of 0.97c. The occupants of the ship are standing with their torsos parallel to the direction of travel. What are the occupants' width according to others on the spaceship
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