Wien's Law: As the temperature of a blackbody increases, what happens to the peak wavelength of the light it radiates?
A. It gets longer.
B. It gets shorter.
C. The wavelength is not affected by the temperature of the object.
Answer: B
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Most Greek philosophers believed in a geocentric Universe
a. True b. False Indicate whether the statement is true or false
A hot air balloon has a volume of 2.00 × 103 m3 when fully inflated, and the air inside the balloon is always at atmospheric pressure of 1.01 × 105 Pa because of the large opening used to fill the balloon and heat the air inside it
What is the mass of hot air inside the balloon if its temperature is 120°C? The universal gas constant is 8.314 J/mol ? K. (Assume a molecular weight of 28.8 g/mol for air.) A) 1780 kg B) 5850 kg C) 203 kg D) 62.0 kg
A 3.0-kg object moving in the positive x direction has a one-dimensional elastic collision with a 5.0-kg object initially at rest. After the collision the 5.0-kg object has a velocity of 6.0 m/s in the positive x direction. What was the initial speed of the 3.0 kg object?
a. 6.0 m/s b. 7.0 m/s c. 4.5 m/s d. 8.0 m/s e. 5.5 m/s
A physics student is riding on a train traveling north. Having read about inertia, the student performs an experiment with a golf ball. He reaches over the aisle and drops the ball from rest. Instead of hitting the floor directly below the student's hand, it hits to the north, i.e., forward of that position. Which of the following might be the cause for this to happen?
a. The train is moving at constant velocity. c. The train is slowing down. b. The train is speeding up. d. Whatever the cause, it cannot be any of the answers given.