Which of the fundamental forces pulled together hot, dense areas of matter in the early universe to begin the process of star formation?

Radio signals travel at a rate of 3 * 10^8 meters per second. How many seconds would it take for a radio signal to travel from a satellite to the surface of the Earth if the satellite is orbiting at a height of 3.6 * 10*7 meters? A.) 8.3 seconds B.

A concave mirror has a focal length of 30.0 CM. an object is placed 15.0 CM from the mirror. what is the radius of curvature of the mirror?

What happens to the temperature of the water inside the beaker after all of the ice melts? Why?

A fan is driven by an electric motor. Explain how adding a thermistor to the circuit would make the fan move faster when the room is warmer.

American football uses a field that is 100.0yd long, whereas the a soccer field is 100.0m long. Which field is longer and by how much (give yards, meter, and percent)

What happens to the force of gravitational attraction if the distance between two objects increase?

How are molecules in a neutral state different from ions?

What is a hypothesis for why mitochondrion has separate dna from the nuclease?

An airplane flies 1350km in 2 1/4 hours. What is its average speed in kilometers per hour?

A projectile is launched over a horizontal surface in such a manner that its maximum height is 3/5 of its horizontal range. Determine the launch angle.