A student made the electromagnet shown and used it to pick up one sewing pin. Which change to the electromagnet would most likely allow it to pick up
two sewing pins?
A. Replace the nail with a thick roll of paper.
B. Double the length of the wires that connect it to the battery
C. Double the number of coils of wire around the nail.
D. Replace the nail with a large steel bolt.

What are igneous intrusions and extrusions

Ain is , is 's of ? 0.62 0.79 1.27 1.50

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?