This is meant to be physics
a ball moves along a smooth metal surface while an identical ball moves along concrete.
which surface exerts a smaller amount of frictional force on the ball?
1. neither concrete nor metal exert any friction on the ball because these two surfaces never result in a frictional force on any object.
2. the metal surface exerts less frictional force because there are fewer bumps and irregularities on it than there are on the concrete.
3. the concrete and metal surfaces exert the same amount of frictional force on the ball because they are both solid surfaces.
4. the concrete surface exerts less frictional force on the ball because there are fewer bumps and irregularities on the concrete than there are on the metal.

How do temperature and salinity affect deepwater currents? as temperatures and salinity levels of water increase, the water rises to the surface where it creates currents as it moves to colder regions. they create changes in wind direction, moving denser water in the same direction as the wind and causing the deepwater circulation patterns found in the ocean. they equalize the forces on undersea currents caused by the coriolis effect as they replace more dense water with less dense water. they create density differences that cause dense deepwater currents to flow toward the equator where they displace less dense, warmer water above them.

What mass of glucose is produced when 54g of water react with carbon dioxide

(04.05 hc) analyze the given diagram of the carbon cycle below. an image of carbon cycle is shown. the sun, a cloud, two trees, one on the left and the other on the right, an animal, lake, and a factory are shown in the image. an arrow is shown from the sun towards the left tree marked a. the sun is marked b. there is an arrow from the air above the clouds, marked c, towards the left tree. an arrow from a location close to the ground marked d points towards dead organisms, which is a label under the animal. an arrow marked e points from the right tree straight up to the clouds. an arrow marked f points from the animal straight up to the clouds. an arrow marked g points from the factory towards the air above the clouds, c. there is an arrow pointing from the air to the lake labeled carbonates in water, an arrow pointing down from dead organisms to fossils and fossil fuels, and an arrow from fossils to the factory. part 1: which compound does c represent? part 2: name a process that could release this compound into the air. part 3: explain how the elements that form it are conserved during the carbon cycle. use complete sentences to explain your answer.