The Sun's density is about the same as Saturn's
Indicate whether the statement is true or false
FALSE
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If a = 3.0 mm, b = 4.0 mm, Q1 = 60 nC, Q2 = ?80 nC, and q = 36 nC in the figure, what is the magnitude of the electric force on q?
A. 5.0 N B. 4.4 N C. 3.8 N D. 5.7 N E. 0.60 N
What is the agreed-upon direction of rotational velocity?
a. The direction the object is rotating (effectively clockwise). b. In the direction opposite to the way the object is rotating (effectively counterclockwise). c. Along the axis of rotation in the direction your thumb would point if the fingers of your left hand curl along the motion of the spinning object. d. Along the axis of rotation in the direction your thumb would point if the fingers of your right hand curl along the motion of the spinning object. e. Along the axis of rotation in the direction your index finger would point if the thumb of your right hand points along the motion of the spinning object.
Cygnus X-1 was discovered because it is a(n) ________ source in a(n) ________ system
Fill in the blank(s) with correct word
Transmitting power at high voltage, e.g., 400,000 V, reduces the power loss for transmission lines. But such a voltage would destroy electrical devices in household use. How then can such 400,000 V electricity be used in a normal house?
a. The ground prongs on household plugs reduce the voltage to 120 V. b. Before reaching households, transformers are used to reduce the voltage appropriately. c. No matter the incoming voltage, a 120 V device only lets 120 V in. d. The 400,000 V is just theoretical; long distance transmission lines actually use 120 V.