Which of the following could you do to increase the strength of an electromagnet? decrease the number of windings

decrease the electric current

change the core from wood to iron

all of the above

What type of silicate mineral is olivine? chain sheet framework independent tetrahedral

Converting 15 miles to kilometer

By considering the hybridization of orbitals in diamond, explain why it is (a) an electrical insulator at room temperature and (b) extremely hard.

What can you infer about copper and sliver based on their position relative to each other on the periodic table?

In a grocery store you push a 12.5 kg shopping cart

You measure the magnetic field of a long, current-carrying wire to be B is equal to start fraction 50 times mu naught over pi end fraction at a distance of r = 7.5 cm. How much current is running through the wire?

In any food chain or web, the original source of energy is

Which organisms develop gills from pharyngeal arches and later develop lungs to breathe on land

How much energy (in joules) is required to evaporate 0.0005 kg of liquid ammonia to vapor at the same temperature?

It is 5.5 km from your home to the physics lab. As part of your physical fitness program, you could run that distance at 10 km/h (which uses up energy at the rate of 700 W), or you could walk it leisurely at 3.0 km/h (which uses energy at 290 W).