On the early earth, volcanic activity had a major effect on the composition of the___.

A. Oceans

B. Core

C. Atmosphere

D. Moon

What color would an object be if it absorbed all light

Newton's first law of motion states that an object remains at rest unless an force acts on it. A. Balanced b. Frictional c. Gravitational d. Unbalanced

A 60 kg woman stands in an elevator that is accelerating downward at 3.1 m/s2. Calculate the amount of force she exerts on the elevator floor.

What is the wavelength of a radio photon from an "am" radio station that broadcasts at 1160 kilohertz? what is its energy?

A 8000kg tow truck pulls a 3000kg car horizontally into a garage. if the motor of the tow truck exerts a forward thrust on the truck of 800N, what is the tension in the cable connecting the truck to the car? (neglect any forces of friction)

If you are trying to balance a seesaw and you have a higher mass on the left, should the mass on the right be placed at a greater distance or lower distance to balance it? Why?

A car travels 300 km in the first 3 hours of a trip. Then it hits traffic and travels only 60 km during the last hour. What is the average speed of the car? a.) 180 km/h b.) 100 km/h c.) 90 km/h d.) 120 km/h

What is the purpose of using a wedge? A. separates objects B. keeps objects together C. allows you to exert force over a distance

Echolocation is an acoustic principle in which some wildlife use resonance to find food at night. Question 25 options: True False

Use the drop-down menus to identify the variables for the second hypothesis. Hypothesis #2: As you build circuits, you will alter resistance, which is the y variable.