The relationship between observation and hypotheses

A 52 N sled is pulled across a cement sidewalk at constant speed. A horizontal force of 36 N is exerted. What is the coefficient of sliding friction between the sidewalk and the metal runners of the sled? Select one: A. 0.69 B. 16 C. 1872 D. 1.44

What type of rock would you expect to form from the material found along a beach?

Radio waves coming from a radio station are tuned into by a student in class. What form of energy transfer does the radio station model?

The teacher decided to show the break down of grades received on the the test. what would be the best type of graph to use?

Andre is studying snails and how fast they travel. He observes three groups of snails containing four snails each. Here are the recorded observations from Andre's notebook: Group A Snails averaged a speed of 4.7cm/min in a petri dish.

The length of a rectangular sheet of metal decreases by 34.5 cm. Its width decreases proportionally. If the sheets original width was half the original length and the new area of the sheet is 1.

Consider a ball falling toward earth. why is the momentum of the ball not conserved? in what system that includes the falling ball is the momentum conserved? "

What is the maximum value that an eccentricity can be? What shape would this be?

Which of the following vectors is equal to r⃗ AB?

Students connect a spring scale to a block on a rough horizontal surface. The students use the spring scale to measure the magnitude of the horizontal force needed to pull the block at a constant speed.