What does it mean to say the mass is conserved during a physical change?

Does sound move faster in a warm or cold room

The figure shows a zero-resistance rod sliding to the right on two zero-resistance rails separated by the distance L = 0.40 m. The rails are connected by a 10.5-Ω resistor, and the entire system is in a uniform magnetic field with a magnitude of 0.

Suppose that the height (in centimeters) of a candle is a linear function of the amount of time (in hours) it has been burning. After 11 hours of burning, a candle has a height of 27.9 centimeters.

Which equation relates charge, time, and current?

Milwaukee is 121 in Miles Due West of Grand Rapids Maria drives 255 miles in 4.75 hours from Grand Rapids to Milwaukee find her average driving speed

What is the total number of atoms in the following formula? CaBr2 4 3 2 1

Object A with a mass of 500 kilograms hits stationary object B with a mass of 920 kilograms. If the collision is elastic, what happens after the collision? A) Both object A and object B move forward but with different velocities.

A young man walks daily through a gridded city section to visit his girlfriend, who lives m blocks East and nblocks North of where the young man resides.

Aliens from planet Moby have three alleles for skin color: R (red) W (white) and B (Blue). If all of these alleles are codominant and aliens on planet moby can only inherit two alleles for a gene, what are the six possible genotypes for skin color

The difference between two numbers is 15. When twice the smaller number is subtracted from three times the larger number, the difference is 58. What is the larger number?