Our Moon is in a 1:1 synch, with a lunar rotation equaling an Earth year
Indicate whether the statement is true or false
FALSE
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A baseball outfielder throws a baseball of mass 0.36 kg at a speed of 34.0 m/s and initial angle of 30°. What is the kinetic energy of the baseball at the highest point of the trajectory? Ignore air friction
a. zero b. 312 J c. 156 J d. 52.0 J e. 208 J
A mass vibrates back and forth from the free end of an ideal spring (k = 20. N/m) with an amplitude of 0.30 m. What is the kinetic energy of this vibrating mass when it is 0.30 m from its equilibrium position?
A) 1.4 J B) 0.90 J C) zero D) 0.45 J E) It is impossible to give an answer without knowing the object's mass.
If a nucleus has a volume of
what is its mass number?
A. 1 B. 25 C. 100 D. 138 E. 174
A vertical side of a cooling tower is approximately 90ºC when the surrounding air is 25ºC. If the tower is 30 m high, estimate the maximum vertical velocity of the air due to natural convection.
What will be an ideal response?