A train travels 76 kilometers kilometers in 2 hours and then 54 kilometers in 5 hours. What is tuts average speed?

Which scenario is a an example of a physical change

Conversion of the sun's energy from fossil fuels into electricity does not involve: a. coal c. steam b. wind d. turbines

What is the relationship between force of gravity and mass

Whic ones are true and false? a. The internal energy of a system decreases when work is done on the surroundings. b. The internal energy of a system increases if heat flows from the surroundings to the system. c.

How many neutrons does element X have if its atomic number is 23 and its mass number is 90?

For each case, identify the force (including its direction) that causes the acceleration. (a) A sprinter at the very start of the race.

Select the effects of radiation below that are stochastic: associated with short-term, high-level exposure associated with long-term, low-level exposure include cancer and other DNA mutation include burns and radiation sickness

On the modern periodic table, elements are ordered according to what?

Jack drops a stone from rest off of the top of a bridge that is 24.4 m above the ground. After the stone falls 6.6 m, Jill throws a second stone straight down. Both rocks hit the water at the exact same time.

How is Electric current able to flow?