A 0.12-kg ball is moving at 6.0 m/s when it is hit by a bat, causing it to reverse direction and have a speed of 8.0 m/s. What is the magnitude of the change in the momentum of the ball?
a. 0.39 kgm/s
c. 1.7 kgm/s
b. 0.42 kgm/s
d. 2.4 kgm/s
C
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On a PV diagram, if a process involves a closed curve, the area inside the curve represents
a. internal energy. b. heat. c. work. d. zero.
A block is on a frictionless horizontal table, on earth. This block accelerates at 1.9 m/s2 when a 90 N horizontal force is applied to it. The block and table are then set up on the moon where the acceleration due to gravity is 1.62 m/s2
What is the weight of the block on the moon? A) 77 N B) 67 N C) 58 N D) 48 N E) 39 N
Europa's visible surface:
A) contains a very clean liquid. B) contains several craters. C) has long cracks in its icy crust. D) has a terrain resembling a liquid stream.
A mule is an example of an exception to which of the fundamental characteristics of life?
A) response to environment?mules cannot respond to changing environmental conditions and that is why they are stubborn B) evolutionary adaptation?because mules are sterile they cannot evolve and adapt C) growth and development-mules being sterile do not grow and develop like other life forms D) reproduction?a mule is sterile and cannot reproduce even though it is the product of reproduction between two closely related animals (a horse and a donkey)