PLEASE ANSWE

A student claims that a magnetic field can affect objects that are not in direct contact with each other. Which argument best supports the students claim?

A. A lighting bolt releases a charge from the sky to the ground.
B. A light bulb becomes hot to the touch after being lit.
C. A ball rolls downhill and eventually comes to a stop.
D. A compass needle points to the north from any location.

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false

Which sample at stp has the same number of atoms as 18 liters of ne at stp

Listenbase your answer to the question on the information below. nuclear radiation is harmful to living cells, particularly to fast-growing cells, such as cancer cells and blood cells. an external beam of the radiation emitted from a radioisotope can be directed on a small area of a person to destroy cancer cells within the body. cobalt-60 is an artificially produced radioisotope that emits gamma rays and beta particles. one hospital keeps a 100.0-gram sample of cobalt-60 in an appropriate, secure storage container for future cancer treatment. which choice represents the correct product for the beta decay of the co-60? fe-60ni-60fe-61ni-61