A futuristic design for a car is to have a large solid disk-shaped flywheel within the car storing kinetic energy
The uniform flywheel has mass 370 kg with a radius of 0.500 m and can rotate up to Assuming all of this stored kinetic energy could be transferred to the linear velocity of the car, find the maximum attainable speed of the car.
What will be an ideal response?
Answer: 246 m/s
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Which of the following statements about matter-antimatter engines is not true?
A) One of the major challenges to developing matter-antimatter engines is finding a way to store antimatter after it is produced. B) Matter-antimatter engines would be great in theory, but to date we have no evidence that antimatter even exists. C) Matter-antimatter reactions represent the most efficient possible reactions in terms of energy release. D) Spacecraft powered by matter-antimatter engines could probably reach speeds of more than half the speed of light.
Light spreads out when it passes through a narrow slit because of interference
Indicate whether the statement is true or false
I observe a galaxy that is 100 million light-years away: what do I see?
A) the light from the galaxy as it is today, but it is blueshifted B) the light from the galaxy as it is today, but it is redshifted C) the light from the galaxy as it was 100 million years ago and it it blueshifted D) the light from the galaxy as it was 100 million years ago and it is redshifted E) Nothing: the galaxy lies beyond the cosmological horizon.
3.0 × 10^5 times 1.5 × 10^9 is equal to
a. 4.5 × 10^45. b. 4.5 × 10^14. c. 2.0 × 10^4. d. 2.0 × 10^14. e. 2.0 × 10^45.