Nellie tosses a ball upward at an angle. Assuming no air resistance, which component of velocity changes with time?
A) the horizontal component
B) the vertical component
C) both of these
D) neither of these
Answer: B
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The force required to move a 90.0 kg object in a 85.0 m circle at a constant speed of 8.10 m/s is
a. 0.0 N b. 69.5 N c. 0.77 N d. 8.58 N
Electric charge is uniformly distributed inside a nonconducting sphere of radius 0.30 m. The electric field at a point P, which is 0.50 m from the center of the sphere, is 15,000 N/C and is directed radially outward
At what distance from the center of the sphere does the electric field have the same magnitude as it has at P? A) 0.11 m B) 0.13 m C) 0.17 m D) 0.15 m E) at no other point
Type II supernovae are believed to occur when the cores of massive stars collapse
a. True b. False Indicate whether the statement is true or false
A thin-walled spherical tank with a diameter of 1.5 m and wall thickness of 65 mm has an internal pres- sure of 20 MPa. The maximum shear stress in the wall of the tank is approximately:
(A) 58 MPa
(B) 67 MPa
(C) 115 MPa
(D) 127 MPa
