Why is the amount of mechanical energy produced less than the amount of electrical energy used?

3. Which of the following magnetic scenarios will repel each other? 1. N-N 2. N-S 3. S-N 4. S-S a. 1 and 2 b. 2 and 3 c. 1 and 4 d. 3 and 4

Object 1 of mass m moves with speed v in the positive direction. Object 2 of mass 3 m moves with speed 4 v in the negative x-direction. How does the kinetic energy of mass 2 (K2) compare to the kinetic energy of mass 1 (K1)

Which group has the Same electron shells? A Titanium and Gold B Selenium and Tin C Calcium and Magnesium D Lithium and Boron

What are the units of measurement for length

The specific heat of copper is 0.385 j/g•°c. Which equation would you use to caculate the amount of heat needed to raise the temperature of 0.75 g of aluminum from 7°c to 29°c?

What is the weight of a 15kg dog on earth?

Identify the scenario below as to whether they increase, decrease, or not change the frequency in which a string vibrates and thus change its pitch. Assume that no other changes are happening. 1. Tightening a string for greater tension 2.

Explain what each of the following scientists contribute to the atomic theory

A fully charged parallel-plate capacitor remains connected to a battery while a dielectric is slid between the plates. Do the following quantities increase, decrease, or stay the same? Select one or more: a. delta V increases b.

Energy is observed in two basic forms: potential and kinetic. Which of the following correctly matches these forms with a source of energy? a. the heat released from a living organism: potential energy b.