A combination of one or more fundamental units is called a(n) ______________ unit
Fill in the blank(s) with correct word
derived
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An inertial force can be felt by observers
A. in a vacuum. B. at rest in any medium. C. moving much more slowly than the speed of light. D. whose reference frame moves in a circle.
RC Circuits: A capacitor C is connected in series with a resistor R across a battery and an open switch. If a second capacitor of capacitance 2C is connected in series with the first one, the time constant of the new RC circuit will be
A. the same as before. B. larger than before. C. smaller than before. D. variable.
As a star like the Sun exhausts hydrogen in its core, the outer layers of the star become hotter and more luminous
a. True b. False Indicate whether the statement is true or false
A 1.6-kg ball is attached to the end of a 0.40-m string to form a pendulum. This pendulum is released from rest with the string horizontal. At the lowest point of its swing, when it is moving horizontally, the ball collides with a 0.80-kg block initially at rest on a horizontal frictionless surface. The speed of the block just after the collision is 3.0 m/s. What is the speed of the ball just after the collision?
A. 1.7 m/s B. 1.1 m/s C. 1.5 m/s D. 1.3 m/s E. 2.1 m/s