If an object is in equilibrium, the net torque about any arbitrary axis must be zero
Indicate whether the statement is true or false
TRUE
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If the temperature changes bythen what is the change in temperature in Celsius?
A. 40
B. 32
C. 26
D. 20
E. 15
A porch roof sloping at 45° accumulated snow to a depth of 30. cm. The roof measured 3.0 m × 5.0 m. If the density of snow was 15. kg/ m2, what was the weight of the snow, in pounds, on the roof?
A) 210 lb B) 74 lb C) 56 lb D) 148 lb E) 105 lb
A skier, of mass 60. kg, pushes off the top of a frictionless hill with an initial speed of 4.0 m/s. How fast will she be moving after dropping 10. m in elevation?
A) 0.20 km/s B) 15. m/s C) 10. m/s D) 0.15 km/s E) 49. m/s
Light strikes a 5.0-cm thick sheet of glass at an angle of incidence in air of 50°. The sheet has parallel faces and the glass has an index of refraction 1.50
(a) What is the angle of refraction in the glass? (b) After traveling through the glass the light re-emerges into the air. What is the final angle of refraction in air? (c) As it leaves the glass, by what distance is the path of the ray is displaced from what it was before entering the glass?