Three cars (car L, car M, and car N) are moving with the same speed and slam on their brakes. The most massive car is car L, and the least massive is car N
If the tires of all three cars have identical coefficients of kinetic friction with the road surface, for which car is the amount of work done by friction in stopping it the greatest? A) The amount of work done by friction is the same for all cars.
B) Car L
C) Car M
D) Car N
B
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An astronaut measures her mass by means of a device consisting of a chair attached to a large spring. The period of oscillation she undergoes when set into motion is used to determine her mass. If her mass together with the chair is 172 kg, and the spring constant is1250 N/m, what is the time required for her to undergo 10 full oscillations?
A. 3.7 s B. 8.6 s C. 170 s D. 23 s
By operating a reversible heat engine with an ideal gas as the working substance in a Carnot cycle and measuring the ratio Qc /Qh, we can calculate
A. n, the number of moles of the ideal gas. B. the ratio Vc /Vh of the volumes of the ideal gas. C. the ratio Pc /Ph of the pressures of the ideal gas. D. the ratio PcVc /PhVh of the products of volumes and pressures of the ideal gas. E. the value of Avogadro's number.
How much energy is necessary to place three charges, each of 2.0 ?C, at the corners of an equilateral triangle of side 2.0 cm?
What will be an ideal response?
When temperature goes up, BOD goes up
What will be an ideal response?