As a student is sitting in her chair, she is not moving. However, there are forces that are acting on her. What must be true about the forces that are acting on the student?
They are acting in the same direction and are not balanced.

They are acting in opposite directions and are not balanced.

They are acting in opposite directions and are balanced.

They are acting in the same direction and are balanced.

Clothing made of several thin layers of fabric with trapped air in between, often called ski clothing, is commonly used in cold climates because it is light, fashionable, and a very effective thermal insulator. so it is no surprise that such clothing has largely replaced thickand heavy old-fashioned coats. (a) consider a jacket made of five layers of 0.1-mm-thick synthetic fabric (k = 0.13 w/m·°c) with 1.5-mm-thick air space (k = 0.026 w/m·°c) between the layers. assuming the inner surface temperature of the jacket to be 28°c and the surface area to be 1.25 m2, determine the rate of heat loss through the jacket when the temperature of the outdoors is 0°c and the heat transfer coefficient at the outer surface is 25 w/m2·°c. (b) what would your response be if the jacket is made of a single layer of 0.5-mm-thick synthetic fabric? what should be the thickness of a wool fabric (k = 0.035 w/m·°c) if the person is to achieve the same level of thermal comfort wearing a thick wool coat instead of a five-layer ski jacket?

A2k pendulum has a speed of 1 m/s at a height of 1/2 meter

As the distance from a magnet increases, what happens to the magnet force?