A force of 1 N accelerates 1-kg box at the rate of 1 m/s2. The acceleration of a 2-kg box by a net force of 2 N is
A) half as much.
B) twice as much.
C) the same.
D) none of the above
Answer: C
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During one day and night in the mid-northern hemisphere, the stars near the north celestial pole
a. rise in the east. b. set in the west. c. circle the north celestial pole counter-clockwise. d. circle the north celestial pole clockwise.
A proton, starting from rest, accelerates through a potential difference of 1.0 kV and then moves into a magnetic field of 0.040 T at a right angle to the field
What is the radius of the proton's resulting orbit? (e = 1.60 × 10-19 C, mproton = 1.67 × 10-27 kg) A) 0.080 m B) 0.11 m C) 0.14 m D) 0.17 m
People can snorkel down to a depth of roughly one meter. This means that the additional pressure on the air in their lungs is roughly
a. 9800 N. b. 9800 Pa. c. 9800 ATM. d. 19,600 N. e. 19,600 N/m2.
The pollutant primarily responsible for acid rain is
a. NO2. b. CO2. c. O3. d. SO2.