Which two objects attract each other?

A.

a proton and an electron

B.

two electrons

C.

a proton and a neutron

D.

two protons

On a cosmic calendar, in which the history of the universe is compressed into one year, when did kepler and galileo first discover that we live on a planet in a solar system

If the amount of food available is increased, then the cricket frog population will (increase/decrease/stay the same) over the span of five years.

How accurately could you predict water temperature for a specific location on the California coast

What is the term for the force experienced by a charged particle in an electromagnetic field?

1. These solar sails are being developed to be used in space. Give a five sentence response explaining how they might be used on Earth

Two children playing on a frictionless garden gate invent a new game called "gate". The idea is that they will get on opposite sides of the gate and each push such that the gate does not move.

What is the frequency of 20 mm microwaves? A) 100 MHz B) 400 MHz C) 15 GHz D) 73 GHz E) 98 GHz

A measure of how much pulling, or tension, a material can withstand before breaking is - A. hardness. B. brittleness. C. tensile strength. D. malleability.

How work done against gravity can be expressed?

An electron is acted on by two electric forces, one of 2.7*10-14 N acting upward and a second of 5.8*10-14 N acting to the right. What is the magnitude of the electric field at the electron's location?