What is the purpose of repeating a measurement using a different method?

If a 10kg object is lifted a distance of 10m from the rest what was the final velocity of the object?

Determine the required height h of the roller coaster so that when it is essentially at rest at the crest of the hill A it will reach a speed of 100km/h when it comes to the bottom B.

Which elements together make up seven percent of the earths crust? calcium and iron calcium and sodium potassium and magnesium potassium and sodium

A car accelerates from rest to a speed 20 m/s in 12 s. Find the distance the car travels this time

The engine will run at 36,000 J in 2 minutes. What is the engine power?

If two parallel light rays hit a plane mirror, what will be their orientation to one another after they reflect? a. they will remain parallel. b. they will be perpendicular. c. it depends on the initial spacing between the light rays. d.

To extend the electrical system between the main panel and the secondary panel, the electricians used A. Receptacles B. Circuit breakers. C. feeders. D. insulators

Men in the age of 18-34 years need to be able to run a marathon in 3 hours and 10 minutes to qualify for the Boston Marathon. How many seconds is this? Show your work.

What is the center of our solar system?

A - 4.0-µC charge is located 0.45 m to the left of a + 6.0-µC charge. What is the magnitude and direction (to the right or to the left) of the electrostatic force on the positive charge?