How do I remember the Mohs hardness scale?

How much time does it take a person to walk 12 km north at a velocity of 6.5 km/hr

The electric force on two charges, Q1 and Q2, that are separated by a distance d is given by F. if you increase their distance to 5d, what is the electric force?

some galaxies have regions that are relatively blue other regions appear redder what does this varuation indicate about the differences between these regions?

Overgrazing, deforestation,&poor irrigation & cultivation all contribute significantly to

How does wind affect precipitation

Since you've determined that the power supply is a 700W dual rail, what does that make the maximum output power?

A 2 m length of an aluminum pipe of 240 mm outer diameter and 10 mm wall thickness is used as a short column to carry a 640? centric axial load. Knowing that? = 73? P? and? = 0.

A python can detect thermal radiation from objects that differ in temperature from their environment as long as the received intensity of thermal radiation is greater than 0.60 W/m2. Your body emits a good deal of thermal radiation.

A planet has a mass of about 6.4 x 1023 kg, and its moon has a mass of about 9.6 x 1015 kg. if the magnitude of the gravitational force between the two bodies is 4.6 x 1015 n, how far apart are the planet and its moon? a. 9.4 x 106 c. 4.6 x 109 b. 2.

Is burning a nonrenewable natural gas a chemical change