When may a scientist change a hypothesis

In the diagram above, a heavy box is being lifted. what is the function of the pulley

Why are experiments often performed in laboratories? O A. They are better at representing the real world. O B. There are fewer variables to control. C. Scientists only want to know what happens in labs. O D.

A cat climbs 10 m directly up a tree. What is the horizontal component of the cat's displacement? Answer in units of m

How to calculate gravitational potential energy?

A railroad diesel engine weighs four times as much as a freight car. If the diesel engine coasts at 24 km/h into a freight car that is at rest, how fast do the two coast after they couple?

Suppose gene A on the left chromosome is damaged and no longer functions. what form of the trait would show? Why?

What is the use of scientific knowledge and research for an action

How do evaporation and condensation relate to heat

Resistance = 0.1 ohm Current = 60 amps Voltage = ? 0.6 6 60 600

The velocity of a roller coaster as it moves down a hill is where v0 is the initial velocity and h is the vertical drop in feet. An engineer wants a new coaster to have a velocity of 90 feet per second when it reaches the bottom of the hill.