A professional cyclist rides a bicycle that is 92 percent efficient. For every 100 joules of energy he exerts as input work on the pedals, how many joules of output work are used to move the bicycle?

The advantage of using the scientific method is that A: it's cautious building of evidence-based understanding is dependable and logical.

As a ball falls, does the potential energy go up or down?

When you hit a nail into a board using a hammer the head of the nail gets warm. In terms of kinetic and thermal energy describe why you think this happens?

Refraction occurs when a wave strikes an object and bounces off. True False

If a person is in front of a smooth surface from which a sound is reflected, the person would hear a sound that a. seems to come from behind the surface. b. has a higher intensity than the sound produced by the source. c.

What is Nothing. (sorry i have been wondering this for a very long time)

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.