The power rating of a resistor is 0.80 W. If the value of the resistor is 400 ?, what is the maximum current it can draw?
A) 45 mA
B) 18 mA
C) 4.4 mA
D) 2.0 mA
E) 320 mA
A
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An object is attached to a vertical spring and bobs up and down between points A and B. Where is the object located when its kinetic energy is a maximum?
A) at either A or B B) midway between A and B C) one-third of the way between A and B D) one-fourth of the way between A and B E) at none of the above points
A 4.0-cm tall object is placed 60 cm in front of a converging lens of focal length of magnitude 30 cm. What are the nature and location of the image?
A) The image is real, 2.5 cm tall, 30 cm on the same side as object. B) The image is virtual, 2.0 cm tall, 15 cm on the other side of the lens. C) The image is real, 4.0 cm tall, 60 cm on the other side of the lens. D) The image is virtual, 4.0 cm tall, 60 cm on the same side as object. E) The image is virtual, 2.5 cm tall, 30 cm on the other side of the lens.
A neutron has a mass of 1.67 × 10^-27 kg. Its de Broglie wavelength is 1.4 × 10^-10 m. What temperature would it correspond to if we had a monatomic gas having the same average kinetic energy (in °C)?
a. 273 b. 25 c. 36 d. 309 e. 51