Which type of rock is formed when magma from the Earth's core reaches the surface and cools?

What two equations can be used to determine the speed of a wave

What happens to the pressure in a sealed container if the amount of a gas in the container increases? Pressure stays the same. Pressure increases and then quickly decreases Pressure increases. Pressure decreases.

Avery likes to walk 30 feet in 10 seconds. What is her speed?

If you throw a 0.25-kg ball with a force of 20 N, what's the acceleration of the ball?

The standard used by LEED in the Water Efficiency (WE) category to determine the baseline case for building water usage is the national standard for maximum flush and flow rates called:

Explain what surface tension is.

A helium-filled balloon is launched when the temperature at ground level is 27.8°c and the barometer reads 752 mmhg. if the balloon's volume at launch is 9.47 * 10^{4} 4 l, what is the volume in liters at a height of 36 km, where the pressure is 73.

Consider the moment when the spring is at its maximum compression. At that moment, the kinetic energy, the gravitational potential energy, and the elastic potential energy are, respectively, a - zero, at a maximum, and at a maximum b - at a maximum,

Ari, a young patient who is regularly treated by a psychiatrist, feels compelled to carry out repetitive tasks the same way very frequently. If Ari does not conduct these tasks with extreme precision, he can feel extremely nervous and uncomfortable.

A friend says, "Stars produce energy by a fusion chain reaction of helium into hydrogen." Evaluate the validity of this statement. A) It is an valid statement. Stars produce energy by a fusion chain reaction of hydrogen into helium.