What is calculated by speed of light/wavelength?

Which of the following is true of machines? A. Machines increase the amount of force required to do a task. B. Machines reduce the total amount of work required to do a task. C. Machines increase the total amount of work required to do a task. D.

A rock is dropped from the top of a 500m cliff. How long does it take the rock to reach the bottom

In a chemical reaction, the total mass of the reactants is 10.0 grams. After the reaction, the total mass of the products must be:

A river flows due south with a speed of 1.4 m/s. you steer a motorboat across the river; your velocity relative to the water is 4.7 m/s due east. the river is 660 m wide.

What element is a halogen with 5 energy levels

Which way does wind blow, A. horizontally, B. Only from east to west, C. Only from West to east, D. vertically

If you were asked how to evaluate scientific evidence, what would you would want to include in your answer?

What caused the slope to change around 1905 and 1906?

What are sound waves

Technician A says if a system fails to alter dwell when it should, the ignition control module needs to be adjusted to correct dwell timing.