The law of conservation of matter states that during a chemical reaction, the amount of matter

increases.

decreases.

disappears

stays the same

Three students derive the following equations in which x refers to distance traveled, v the speed, a the acceleration (m/s^2), and t the time, and the subscript (0) means a quantity at time t=0: a) x=vt^2 + 2at, b) x=v0t+1/2at^2, and c) x=v0t+2at^2.

How does a thunderstorm break apart and disappear?

Airplane A, starting from rest with constant acceleration, requires a runway 400 m long to become airborne. Airplane B requires a takeoff speed twice as great as that of airplane A, but has the same acceleration, and both planes start from rest.

If conducted accurately, identical investigations should produce similar results. Sometimes, errors, like measurement errors, can cause differences in results.

Object A with a mass of 500 kilograms hits stationary object B with a mass of 920 kilograms. If the collision is elastic, what happens after the collision? A) Both object A and object B move forward but with different velocities.

If an injury is caused by impact from an object alone, is this considered a caught-in or - between incident? Select the best option No, this is a struck-by incident Yes No, this type of incident is undefined

Even though animals can communicate with each other to a limited extent, no animal can express itself through: A : motions B : noises C : speech D : instinct

1. a. What is the name of the 2d Century Roman Scientist and Astrologer who created a set of "Handy Tables of data to compute the position of the Sun, moon and stars?

What are the primary colors of light

A light-year is the distance light travels in one year, at a speed = 2.998 x 10^8 m/s. (a) How many meters are there in 1.00 light years? (b) An AU is the average distance from the Sun to the Earth, 1.50 x 10^8. How many AU are there in 1.