A -4.0-?C charge is situated at the origin of an xy-coordinate system. What is the potential difference between a point x = 4.0 m and y = 2.0 m because of this charge?
A) -9.0 × 103 V
B) 9.0 × 103 V
C) -36 × 103 V
D) 36 × 103 V
E) 0 V
B
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How much energy (in eV) does a photon of orange light (? = 609 nm) have? (h = 6.63 × 10^?34 J?s, c = 3.00 × 10^8 m/s, 1 eV = 1.60 × 10^?19 J, and 1 nm = 10?9 m)
a. 3.27 eV b. 0.31 eV c. 2.04 eV d. 0.68 eV e. 5.23 eV
Some parts of the Sun rotate faster than other parts
Indicate whether the statement is true or false
When the sum of the external forces and the sum of the external torques on a body are both zero, we can conclude that
A. the body is moving at constant velocity but is not rotating. B. the body is rotating at constant angular velocity but has no linear velocity. C. the body has neither linear nor angular velocity. D. the body may have constant linear or angular velocity, but not both simultaneously. E. the body may have constant linear or constant angular velocity, or both simultaneously.
The density of an object is defined as
a. the volume occupied by each unit of mass. b. the amount of mass for each unit of volume. c. the weight of each unit of volume. d. the amount of the substance that has unit volume and unit mass. e. the amount of the substance that contains as many particles as 12 grams of the carbon-12 isotope.