A temperature difference of 9.0 Celsius degrees is equal to a Fahrenheit temperature difference of
a. 5.0 Fahrenheit degrees.
b. 9.0 Fahrenheit degrees.
c. 16 Fahrenheit degrees.
d. 37 Fahrenheit degrees.
e. 41 Fahrenheit degrees.
c
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Friction: A 50-kg box is being pushed along a horizontal surface. The coefficient of static friction between the box and the ground is 0.65, and the coefficient of kinetic friction is 0.35. What horizontal force must be exerted on the box for it to accelerate at 1.2 m/s2?
A. 60 N B. 120 N C. 170 N D. 230 N E. 490 N
Force on a Moving Charge: An electron, moving south, enters a magnetic field. Because of this field, the electron curves upward. We may conclude that the magnetic field must have a component
A. downward. B. towards the east. C. upward. D. towards the west. E. towards the north.
For all paths of Earth satellites, one focus of the path is
A) the location from which the satellite was launched. B) Earth's center. C) the Sun's center. D) need more information
Study the sizes of the gas giants shown in the image above (the distance from the Sun increases from left to right), and choose the best explanation that accounts for their differences in size.
Choose one: A. Gas giants increase in size with increased distance from the Sun because more types of materials could condense farther out. B. Gas giants increase in size with increased distance from the Sun because the Solar Nebula was denser farther out. C. Gas giants decrease in size with increased distance from the Sun because the Solar Nebula was less dense farther out. D. Gas giants decrease in size with increased distance from the Sun because fewer types of materials could condense farther out.