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Our Milky Way galaxy is 100000 ly in diameter. A spaceship crossing the galaxy measures the galaxy's diameter to be a mere 1.0 ly.
What is the speed of the spaceship relative to the galaxy?
How long is the crossing time as measured in the galaxy's reference frame?
If the incident angle from the air is 30 degrees and the refracted angle within the glass in 20 degrees what is the index of refraction of the glass plate
a spring is hanging down from the ceiling and an object of mass m is attached to the free end. the object is pulled
The primary coil of a transformer has N1 = 1.50 102 turns, and its secondary coil has N2 = 5.00 101 turns. what rms voltage is developed across the secondary coil
Why does the base of a shuttle cock always lead in motion when hit with a racket. what is grocery carts final speed.
A coil of inductance 70 mH and unknown resistance and a 0.85 µF capacitor are connected in series with an alternating emf of frequency 980 Hz. what is the resistance of the coil
A window washer is climbing up a ladder to wash a window. The end of the 10.5 foot ladder exactly touches the windowsill, How far off the ground is the windowsill
At what speed do a bicycle and its rider, with a combined mass of 100-kg, have the equal momentum as a 1500 kg car travelling at 5 ;{ rm m}/ {rm s}.
An air-track glider is attached to a spring. The glider is pulled to the right and released from rest at. It then oscillates with a period of 1.5 and the maximum speed of 32.
Whenever two Apollo astronauts were on the surface of the Moon, a third astronaut orbited the Moon. Determine the period of the orbit
A three-step cycle is undergone by n moles of an ideal diatomic gas: (1) the temperature of the gas is increased from T_1 to T_2 at constant volume, compute the efficiency of the cycle in terms of T_1 and T_2
A string requires a 186 N force in order to break. A 1.50 kg mass is tied to this string and whirled in a vertical circle with a radius of 1.90 m. What is the highest speed that this mass can be whirled without breaking the string.
What is the resulting compressional force on the Earth. what is the acceleration of a rock at top of its trajectory when it has been thrown straight upward.
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