"Firewalkers" step on the hot ashes and coals from a wood fire without getting their feet burned. How might this be possible?

a. They have magical powers.
b. The ashes are poor conductors of heat.
c. They do get burned but enjoy the publicity.
d. none of the above


b

Physics & Space Science

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A 3.0 kg object is moving to the right at 4.0 m/s. It collides in a perfectly inelastic collision with a 6.0 kg object moving to the left at 2.0 m/s. What is the total kinetic energy after the collision?

A. 62 J B. 25 J C. 12 J D. 0.0 J

Physics & Space Science

What temperature is required to fuse hydrogen?

A) thousands of Kelvin B) millions of Kelvin C) billions of Kelvin D) trillions of Kelvin E) any temperature, as long as gravity is strong enough

Physics & Space Science

For reasons known only to them, a group of extraterrestrials offers you your choice of three gold ingots. One weighs 10 lb on Earth, the second weighs 10 lb on Jupiter, and the third weighs 10 lb on the Moon. To get the most gold, you should choose the ingot that weighs 10 lb on

A. Jupiter. B. the Moon. C. Earth. D. No difference; 10 lbs is 10 lbs wherever you go

Physics & Space Science

Because of air resistance, an object falling a great distance may reach a ______________ velocity

Fill in the blank(s) with correct word

Physics & Space Science