The atmospheric pressure on Venus:
A) shows an extreme change with the seasons.
B) is much lower than on Earth.
C) is about the same as on Mercury.
D) is much higher than on Earth.
E) causes variations in surface temperature.
D
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A beam of x-rays at a certain wavelength are scattered from a free electron that is at rest, and the scattered beam is observed at 45.0° from the incident beam
What is the change in the wavelength of the x-rays during this process? (melectron = 9.11 × 10-31 kg, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s) A) 1.75 × 10-13 m B) 2.76 × 10-13 m C) 0 m D) 3.56 × 10-13 m E) 7.10 × 10-13 m
Measurements show that it takes 0.30 mJ of work to move 5.0-?C of charge from one plate to another of a certain air-filled capacitor while the potential difference between these plates is kept constant
What is the potential difference between the plates of this capacitor? A) 60 V B) 81 V C) 55 V D) 23 V E) 0 V
The astronaut whose heart rate on Earth is 60 beats/min increases his velocity to v = 0.60c. Now what is his heart rate as measured by an Earth observer?
a. 100 beats/min c. 36 beats/min b. 75 beats/min d. 48 beats/min
A motor that can do work at the rate of 2 hp has 60% efficiency. How much current does it draw from a 120. V line? (1 hp = 746 W)
What will be an ideal response?