Explain why an electromagnet usually has a core of iron or steel

When children draw human figures by sketching a circle with dangly lines for legs the children are demonstrating which developmental stage in art? A. Drawing B. Schematic C. pre schematic D. circular

If 0.45 moles of potassium chloride are consumed completely and we start with twice as much silver fluoride, how many moles of solid silver chloride will be produced? A) 0.45 moles B) 0.73 moles C) 0.90 moles D) 1.35 moles

How could some chemical changes be reversed?

The planet Jupiter moves in an elliptical orbit with the sun at one focus. Given that Jupiter's closest approach to the sun is approximately 740.52 million kilometers and that the eccentricity of Jupiter's orbit is approximately 0.

Given that the tensile strength of aluminum foil is 311 megapascals, its thickness is approximately 15.0 micrometers, and a roll of household aluminum foil is 30.

What is the use of scientific knowledge and research for an action

How do evaporation and condensation relate to heat

Resistance = 0.1 ohm Current = 60 amps Voltage = ? 0.6 6 60 600

The velocity of a roller coaster as it moves down a hill is where v0 is the initial velocity and h is the vertical drop in feet. An engineer wants a new coaster to have a velocity of 90 feet per second when it reaches the bottom of the hill.

What are sun spots?