A proton (mass = 1.67 × 10^?27 kg, charge = 1.60 × 10^?19 C) moves from point A to point B under the influence of an electrostatic force only. At point A the proton moves with a speed of 60 km/s. At point B the speed of the proton is 80 km/s. Determine the potential difference VB ? VA
a. +15 V
b. ?15 V
c. ?33 V
d. +33 V
e. ?20 V
b
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a. prominences b. coronal holes c. spicules d. granulation e. auroras
Rotational Kinetic Energy: An Atwood machine consists of a mass of 3.5 kg connected by a light string to a mass of 6.0 kg over a frictionless pulley with a moment of inertia of 0.0352 kg ? m2 and a radius of 12.5 cm. If the system is released from rest, what is the speed of the masses after they have moved through 1.25 m if the string does not slip on the pulley?
A. 2.0 m/s B. 2.3 m/s C. 4.0 m/s D. 5.0 m/s E. 6.0 m/s
A diffraction grating has 300 lines per mm. If light of wavelength 630 nm is sent through this grating, what is the highest order maximum that will appear?
A) 8 B) 2 C) 6 D) 5 E) 5.3
The temperature at the Sun's core is about ________.
A. 1,500,000 K B. 150,000 K C. 15,000,000 K D. 15,000 K