Higher temperatures make rocks weaker
Indicate whether the statement is true or false
TRUE
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Which of the following objects is considered to possibly contain a black hole?
a. The central star of the Crab nebula b. The Orion nebula. c. LMC X-3 d. Algol e. PSR 1257+12
Constant Acceleration Kinematics: A baseball is hit with a bat and, as a result, its direction is completely reversed and its speed is doubled. If the actual contact with the bat lasts 0.45 s, what is the ratio of the magnitude of the average acceleration of the ball to its original speed?
A. 6.7 s-1 B. 4.4 s-1 C. 2.2 s-1 D. 0.15 s-1
A thermally isolated system is made up of a hot piece of aluminum and a cold piece of copper; the aluminum and the copper are in thermal contact. The specific heat of aluminum is more than double that of copper
Which object experiences the greater temperature change during the time the system takes to reach thermal equilibrium? A) The copper experiences a greater temperature change. B) The aluminum experiences a greater temperature change. C) Neither; both objects experience the same magnitude temperature change. D) It is impossible to tell without knowing the masses. E) It is impossible to tell without knowing the volumes.
The type of EM radiation that has wavelength just a bit longer than that of visible light is
a. ultraviolet. b. infrared. c. x-ray. d. microwave. e. gamma ray.