The highest frequency of visible light is
A) red.
B) green.
C) blue.
D) violet.
E) all the same
Answer: D
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The Moon always keeps the same side facing Earth and therefore Earth always keeps the same side facing the Moon
a. True b. False Indicate whether the statement is true or false
A proton moving with a velocity of 4.0 × 104 m/s along the +y-axis enters a magnetic field of 0.20 T directed towards the -x-axis. What is the magnitude force acting on the proton?
A) 8.0 × 10-15 N B) 3.9 × 10-15 N C) 2.6 × 10-15 N D) 0 N E) 1.3 × 10-15 N
Once a basketball player's feet are off the floor in making a jump, the jumper's acceleration
A) depends on launch speed. B) is usually greater for taller players. C) varies with body orientation. D) is g; no more, no less. E) all of the above
The inside of a house is at 20°C on an early morning when the temperature outside is 15°C. The next morning the inside temperature is the same, but the outside temperature is now 5°C. How much does the energy per unit time lost by conduction through the walls, windows, doors, etc., change for the house from the first morning to the second one
a. Since the inside temperature stays the same, the loss is the same both days. b. The loss reduces to 1/3. c. The loss triples. d. The loss increases by 5/278 since we need to use the Kelvin scale for this calculation.