In 2.0 s, a particle moving with constant acceleration along the x axis goes from x = 10 m to x = 50 m. The velocity at the end of this time interval is 10 m/s. What is the acceleration of the particle?
a. +15 m/s2
b. +20 m/s2
c. ?20 m/s2
d. ?10 m/s2
e. ?15 m/s2
d
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Airplane lift is achieved when air pressure on the bottom of its wings is
A) greater than pressure on top. B) less than pressure on top. C) the same as pressure on top.
At what orientation angle relative to the magnetic field direction does the magnetic potential energy of a magnetic dipole have its largest value?
a) 0° b) 45° c) 90° d) 135° e) 180°
A 40.0-g block of ice at -15.0°C is dropped into a calorimeter (of negligible heat capacity) containing water at 15.0°C. When equilibrium is reached, the final temperature is 8.0°C
How much water did the calorimeter contain initially? The specific heat of ice is 2090 J/(kg K) and the latent heat of fusion of water is 33.5 × 104 J/kg. A) 302 g B) 345 g C) 405 g D) 546 g E) 634 g
According to the planetary migration model, the jovian planets are thought to have formed
A) in the orbit where they are now. B) further from the Sun than they are now. C) in another solar system. D) closer to the Sun than they are now. E) none of the above.