A 20-kg Block is pulled along a rough horizontal surface (coefficient of friction μ = 0.1) by a force F = 100 N that acts at an angle θ = 37 degrees with the horizontal. a) Draw and label all forces on the block.
b) Calculate the vertical force exerted by the surface on the block. (The Normal Force)
c) Calculate the net horizontal force on the block.
d) Calculate the acceleration of the block.

Animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. reactivate d) a dog is getting hot in the sunlight, so he moves to a shaded area.

Awheel of mass 48 kg is lifted to a height of 0.8 m. how much gravitational potential energy is added to the wheel? acceleration due to gravity is g = 9.8 m/s2. a. 30.4 j b. 3.1 j c. 297.9 j d. 11,321 j

The photo shows sugar dissolved into a solution with excess sugar at the bottom of the jar this type of solution is classified as a. unsaturated b. compound c. saturated d. plasma