A pebble is dropped from a cliff. Neglecting air resistance, if the rock falls for 4 seconds. How fast is it moving?

Can a reaction force ever be greater or less than an applied force? Explain.

An example of a solution is

The nuclei of all atoms have A. positive charges B. negative charges C. no charges

What is the voltage of a battery that powers a light with. 43 a and has a resistance of 3.5 ohms?

Bacteria which are able to live in extreme conditions are found in this kingdom

If you are trying to balance a seesaw and you have a higher mass on the left, should the mass on the right be placed at a greater distance or lower distance to balance it? Why?

A car travels 300 km in the first 3 hours of a trip. Then it hits traffic and travels only 60 km during the last hour. What is the average speed of the car? a.) 180 km/h b.) 100 km/h c.) 90 km/h d.) 120 km/h

What is the purpose of using a wedge? A. separates objects B. keeps objects together C. allows you to exert force over a distance

Echolocation is an acoustic principle in which some wildlife use resonance to find food at night. Question 25 options: True False

Use the drop-down menus to identify the variables for the second hypothesis. Hypothesis #2: As you build circuits, you will alter resistance, which is the y variable.