To explain gravity, general relativity says that matter tends to ________ space in its vicinity
Fill in the blank(s) with correct word
curve
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A car traveling 85 km h slows down at a constant 0.50 m/s2 just by “letting up on the gas.” Calculate
(a) the distance the car coasts before it stops, (b) the time it takes to stop, (c) the distance it travels during the first and fifth seconds.
If our year were twice as long (that is, if Earth took twice as many days to complete each orbit around the Sun), but Earth's rotation period and axis tilt were unchanged, then ________
A) the four seasons would each be twice as long as they are now B) stars would take twice as long to rise and set C) the cycle of precession would take 13,000 years instead of 26,000 years D) the Earth would not have seasons
A cylinder containing an ideal gas has a volume of 3.0 m3 and a pressure of 1.0 × 10^5 Pa at a temperature of 300 K. The cylinder is placed against a metal block that is maintained at 900 K, and the gas expands as the pressure remains constant until the temperature of the gas reaches 900 K. The change in internal energy of the gas is +6.0 × 10^5 J. How much heat did the gas absorb?
a. 0 c. 12 × 10^5 J b. 6.0 × 10^5 J d. 9.0 × 10^5 J
The acceleration of a ball as it rolls down a ramp is 3 m/s2 . It starts from rest. (a) What is the ball's speed after 4 seconds? (b) How far does the ball travel during the 4 seconds?