Jack pulls a sled across a level field by exerting a force of 120.0 N at an angle of 30.0° with the ground. What are the parallel and perpendicular components, respectively, of this force with respect to the ground?

a. 208 N, 120 N
b. 120 N, 208 N
c. 104 N, 60 N
d. 60 N, 104 N
e. 69 N, 208 N


c

Physics & Space Science

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The _________________ hypothesis includes mergers with smaller galaxies and infalling gas to the standard formation of the Milky Way galaxy

Fill in the blank(s) with correct word

Physics & Space Science

150 g of liquid nitrogen at its boiling point of 77.0 K is stirred into a beaker containing 510 g of 18.0°C water. If the nitrogen leaves the solution as soon as it turns to gas, how much water freezes? The heat of vaporization of nitrogen is 48.0 cal/g and that of water is 80.0 cal/g

a. none b. 21 g c. 42 g d. 11 g e. 63 g

Physics & Space Science

A girl is sitting on the edge of a pier with her legs dangling over the water. Her soles are 80.0 cm above the surface of the water. A boy in the water looks up at her feet and wants to touch them with a reed. (nwater = 1.333.) He will see her soles as being

a. right at the water surface. b. 53.3 cm above the water surface. c. exactly 80.0 cm above the water surface. d. 107 cm above the water surface. e. an infinite distance above the water surface.

Physics & Space Science

Earth's outer core is

a. liquid. b. part solid and part liquid. c. solid. d. frozen.

Physics & Space Science