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Physics

explain how muscles and bones work together to help bend the arm.

3. Which of the following is an example of a supplemental restraint system? (a) air bag (c) lap and shoulder belt (b) safety belt (d) antilock brakes

How much current will a 500 W vacuum cleaner draw if it has a resistance of 30Ω?

A hang glider moves through the air. Does the hang glider have energy? A) Yes because the hang glider is decelerating B) no because the hang glider has no motor C) yes because the hang glider is moving D) no because the hang glider is moving toward the ground

What are plants and animals that get their energy from eating other things? a. producers b. consumers c. decomposers d. herbivores

As the bell rings, which energy transformation occurs? A. Mechanical energy is converted into sound energy. B. Chemical energy is converted into heat energy. C. Mechanical energy is converted into heat energy. D. Chemical energy is converted into sound energy.

What is the kinetic energy (KE) of a 0.155 kg arrow shot upward at 31.4 m/s when it is 30.0 m above the ground? Thank you in advance for your help!

Consider a spinning plate is dropped onto a stationary plate (which is itself at rest on a frictionless surface). Both plates have a radius of 30cm and a mass of 1kg. The spinning plate is initially spinning at a rate of 0.7 revolutions per second. Hint: This is like a totally-inelastic collision. Required: a. After a sufficiently long time, what is the angular velocity of the initially-spinning plate? What about the initially-stationary plate? b. Assume that the period of velocity matching happens over a course of 2 seconds. Further, assume that the torque exerted by each plate on the other is constant over time. In that case, what is the magnitude of the acceleration that each plate feels during those two seconds? Hint: Use the rotational impulse-momentum theorem.

Assuming the coefficient of static friction between the board and the box is unknown, what is the magnitude of the box's acceleration in terms of the frictional force f?

Explain two applications of resonancePLEASEEEE HELP ME! ​

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