What benefit is gained by the addition of the iron core in an electromagnet

Choose the scientific question. A. How common is water in rocks on the Moon? B. Who was the first person to walk on the Moon? C. What have people traditionally believed about the Moon? D.

A billiard ball with a mass of 0.15 kg has a velocity of 5 m/s. It strikes the bumper of the table perpendicularly and bounces straight back with a velocity of 3 m/s. The ball underwent a change in momentum equal to

What were the honeycomb units at which hooke was looking?

A car can accelerate at 5.6m/s^2 from rest how long will it take to reach of 24m/s.

A physics student in a hot air balloon ascends vertically at constant speed. Consider the following four forces present in this situation: 1 = the weight of the hot air balloon 3 = the force of the student pulling on the earth 2 =

A wire carries a steady current of 2.20 A. A straight section of the wire is 0.750 m long and lies along the y axis within a uniform magnetic field, vector B = 1.70 k T.

A 5.00-kg howler monkey is swinging due east on a vine. It overtakes and grabs onto a 6.00-kg monkey also moving east on a second vine. The first monkey is moving at 10.0 m/s at the instant it grabs the second, which is moving at 7.00 m/s.

One of the heating systems we talked about in this course comprises of a system of ducts. What is the process by which heat is transferred in this system? a. Conduction b. Convection c. Radiation d. None of the above

If the north pole of a magnet in a compass is attracted to Earth's geographic north, what must be the polarity of Earth's magnetic north pole? A. north B. south C. It can't be determined from the information given.

A canoe started its trip at 8 am. If the cannoe travelled at a speed of 70 mph how far did it travel by 1:36 pm?