Explain why and how theories may be changed or replaced over time.

The Earth is a spherical object which has a translational (orbital) velocity equal to 67,000 mph and a rotational velocity of 1,040 mph. Do you think there is Magnus force acting on the Earth?

A 50.0N box is at rest on a horizontal surface. The coefficient of static friction between the box and the surface is 0.50, and the coefficient of kinetic friction is 0.30. A horizontal 20.0N force is then exerted on the box.

Identify the number of atoms on the reactant side of the chemical equation. Fe2O3 + 3H2 → 2Fe + 3H2O There are blank Fe (iron) atoms. There are blank O (oxygen) atoms. There are blank H (hydrogen) atoms.

A 1000-kg sports car accelerates from rest to 95 km/h in 6.4 s. What is the average power delivered by the engine

What are the factors that influence the force of gravity

A Find the magnitude of the angular momentum of the second hand on a clock about an axis through the center of the clock face. The clock hand has a length of 15.0 cm and a mass of 6.00 g.

A geologist finds ripples preserved in ancient sedimentary rock that look just like ripples made by water in mud. He concludes that there was once water in that location that created the ripples. Why is this conclusion reasonable?

In science what is the requirement of doing work?

What Fitness Gram test is assessing your cardiovascular endurance?

A graph titled Position versus time for with horizontal axis time (seconds) and vertical axis position (meters). A straight blue line runs with an upward slope from 0 seconds 3 meters to 4 seconds 15 meters. The starting position of this object is m.