The atomic number of an atom is the number of a) protons and neutrons b) neutrons c) electrons and neutrons d) protons

List one type of erosion and describe how it happens?

An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. but she does have devices to measure distance and time accurately. she knows her own mass is 77.4 kg , but she is unsure of the mass of a large gas canister in the airless rocket. when this canister is approaching her at 3.50 m/s , she pushes against it, which slows it down to 1.30 m/s (but does not reverse it) and gives her a speed of 2.60 m/s . what is the mass of the canister?

Give me a example of a decomposer. explain what would happen if decomposers were absent from a forest ecosystem