A very long wire generates a magnetic field of 0.0020x 10^-4 T at a distance of 10 mm. What is the magnitude of the current? A) 2.0 mA B) 3100 mA C) 4000 mA D) 1.0 mA

Why is a magnetic field a vector quantity? A. Directional force B. Directional speed C. Specified location D. It produces long field lines E. It produced field lines that are close together

swelling magma chambers below the surface can cause the crust above to uplift and form a large flat regions higher than the surrounding land known as

84. Two blocks, one of mass 5.0 kg and the other of mass 3.0 kg, are tied together with a massless rope as in Figure 28. This rope is strung over a massless, resistance-free pulley. The blocks are released from rest. Find the following: a.

Which statement about electromagnetic waves is true? A. Electromagnetic waves require a medium to travel. B. Electromagnetic waves don't require a medium to travel. C.

Which of the following statements is a true statement about the use of nuclear energy as an alternative energy source? O A. Production of electricity from nuclear energy does not produce dangerous radioactive waste products. O B.

For a constant voltage, increasing the resistance will cause the current to decrease. true or false

Which of the following is an example of a testable scientific hypothesis? A) Why do plants grow better in the Sun than in the shade? B) Peacocks have prettier tail feathers than pigeons do.

A passenger jet flies from one airport to another 1,273 miles away in 2.2 h. find its average speed.

Wich statement best describe why an island food web could be considered a closed system

If two identical wires carrying a certain current in the same direction are placed parallel to each other, they will experience a force of repulsion. True / False.