The early universe contained only atoms of hydrogen. The universe now contains atoms of over one hundred different elements.

Explain How The Different Atoms Now Contained In The Universe Were Formed.

A person runs with a constant velocity of 1.2 m/s for 30 seconds. how far do they travel?

Where do incident rays that are parallel to the principal axis converge to after reflecting off a concave mirror?

sledge (including load) weighs 5000 N. It is pulled on level snow by a dog team exerting ahorizontal force on it. The coefficient of kinetic friction between sledge and snow is 0.05.

How long does it take for a car to change its velocity from 10 m/s to 25 m/s if the acceleration is 5 m/s2?

2. A golfer wishes to chip a shot into the hole 50 m away on flat level ground. If the ball flies to a maximum height of 25 m, what speed must it have initially to reach the hole?

How does the brightness of a bulb tell you about the energy of electrons passing through it?

Why do you think sound travels faster in steel than it does in wood? (Hint: Think about the densities of the two materials, and how the particles might be arranged.)

On which body would a 100kg man have the least gravitational potential energy when lifted to a height of 3 meters

Which of the following factors can negatively affect development? a. Political corruption and instability b. Lack of resources c. Lack of education d. All of the above

A golf ball is hit with an initial velocity of 155 ft/s at an angle of 23 degrees with the horizontal. After 1.4 seconds, how far has the golf ball traveled horizontally and vertically?. a. 199.7 feet horizontally and 75.2 feet vertically. b. 60.