A train travels 94 kilometers in 5 hours, and then 84 kilometers in 3 hours. What is its average speed?

What is a scalar quantity? Vector quantity? How are these two different?

Christmas tree light bulbs are connected in parallel, not series. can you think of a practical reason for this?

How many neutrons does Krypton (Kr) have?

What form of nitrogen are most plants able to absorb

Silver has a resistance of 1.98 x 10^-4 ohms. What voltage would produce a current of 100 amps?

How do I calculate initial speed by using the slope of a graph? The graph shows the relationship between S { (sin2ϴ) / g} and the average range of a projectile in meters.

You push a 50 kg wooden box across a wooden floor at a constant speed of 1.0 m/s. The coefficient of kinetic friction is 0.15. Now you double the force on the box. How long would it take for the velocity of the crate to double to 2.0 m/s?

A star is in hydrostatic equilibrium when the outward push of pressure due to core burning is exactly in balance with the inward pull of gravity.

How are mass and weight different? a. Mass is the space an object takes up and weight is the effect of gravity on mass. b. Mass is the amount of matter and weight is the effect of gravity on mass. c.

What were the discoveries of astronomers like Copernicus and Galileo?