A car's motor gives out just at the bottom of a big hill, but the car starts coasting up the hill. In what direction is the acceleration of the car just as it stops momentarily before rolling back down the hill?
What will be an ideal response?
It must be downhill through all the motion after the motor conks out, including
when it stops momentarily.
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What is the mass of an object on which Earth exerts a gravitational force of 685 N near Earth's surface where g = 9.80 m/s2?
A) 69.9 kg B) 68.5 kg C) 71.3 kg D) 72.7 kg
System 1 is 4.20 moles of a monatomic ideal gas held at a constant volume as it undergoes a temperature increase. System 2 is 4.20 moles of a diatomic ideal gas held at constant volume as it also undergoes a temperature increase. The thermal energy absorbed by System 1 is Q1, and the thermal energy absorbed by System 2 is Q2 as both systems undergo a temperature increase of 76.0 K. What is the
ratio Q1/Q2? a. 1.00 b. 0.600 c. 1.67 d. The volumes of the systems need to be known before the ratio can be found. e. 2.50
A long wire carrying a 2.0-A current is placed along the y-axis. What is the magnitude of the magnetic field at a point that is 0.60 m from the origin along the x-axis? (?0 = 4? × 10-7 T ? m/A)
A) 6.7 T B) 0.67 µT C) 0.12 µT D) 1.3 µT E) 12 T
Elephants are hunted illegally in Africa for ivory. If the current poaching experience is any guide, the number of elephants will decrease by half in about 25 years
If the elephant population in 1995 was 16,000, by what date would you expect the number to have decreased to 1000? a. 2011 b. 2045 c. 2070 d. 2095 e. 2120