The model below shows a calcium atom. How many electrons are in the third energy level? 2 8 18 20

Two 125 kg bumper cars are moving toward each other in opposite directions. Car X is moving at 10 m/s and Car Z at - 12 m/s when they collide head-on.

Which color of visible light has the greater wavelength red or blue?

A uniform ladder of length l and mass m1 rests against a frictionless wall. the ladder makes an angle θ with the horizontal.

We know velocity of sound v=a₩ (omega), but speed does not depend on amplitude, why?

2. The product of an object's mass and velocity is its centripetal force. momentum. net force. weight. 3. What is conserved when two objects collide in a closed system? acceleration momentum speed velocity 4.

A magnet is pushed into the center of a wire loop and then stops. what is the current in the wire loop when the wire stops moving? explain.

Which feature do highland climates have that lower elevation area do not? A tundra where there are no trees A tree line beyond which trees do not grow Permafrost, or a part of the ground that is permanently frozen An ice cap, or a permanent cover of

As shown in the figure below, Cindy rushes 30 mtoward her truck. She notices she forgot her lunch and returns back to the house. Her total travel time is 90s a. What is Cindy's average velocity over the 90s period? b.

Un atleta que recorre 100 m en 12 s

Assuming equal rates of acceleration in both cases, how much farther would you travel if braking from 59 mi/h to rest than from 25 mi/h?