An x vs. t graph is drawn for a ball moving in one direction. The graph starts at the origin and at t = 5 s the velocity of the ball is zero. We can be positive that at t = 5 s,
a. the slope of the curve is non-zero.
b. the ball has stopped.
c. the acceleration is constant.
d. the curve is at x = 0, t = 0.
b
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LR Circuits: The series circuit shown in the figure contains an ideal battery with a constant terminal voltage VB = 60 V, an ideal inductor L = 42 H, a resistor R = 24 ohm resistor, and a switch S.Initially, the switch is open, and there is no current in the inductor. At time t = 0 s, the switch is suddenly closed. What is the current in the circuit when the voltage across the resistor is equal to the voltage across the inductor?
A. 1.3 A B. 0.50 A C. 1.0 A D. 0.75 A E. 1.5 A
The apparent brightness of an object is calculated as: . If one knew the luminosity and apparent brightness of a star that was too distant for a parallax measurement, what would be the best approach to determining its distance?
A) Insert the values for luminosity and apparent brightness into the equation, then guess the value for the distance that satisfies the equation. B) Solve the equation for distance, then insert the values for luminosity and apparent brightness into the new equation. C) The distance cannot be determined.
Of the terrestrial planets, Mars seems to most promising to exobiologists
Indicate whether the statement is true or false
What are the first three harmonics of a string of linear mass density 2.00 g/m and length 0.600 m when it is subjected to tension of 50.0 N?
What will be an ideal response?