Which of the following would decrease the magnetic field around a wire? A) decreasing the current B) reversing the poles of the wire C) looping a section of the wire into a solenoid D) increasing the current

715 J of heat are transferred from a 1.30 kg aluminum block to a 0.800 kg iron block. Find the temperature change for the iron.

Which of the following are true about centripetal force? Check all that apply. A. Without centripetal force, an object cannot accelerate. B. Friction can be a centripetal force, such as when it keeps a car on the road going around a curve. C.

A light ray in water is incident on a boundary with air at an angle of 22°. The refractive index of water is 1.33 and that of air is 1.00. What is the angle of refraction in air? A) 15° B) 22° C) 30° D) 45°

Over time, the star-gas-star cycle leads the gas in the milky way to

When two objects are in contact, moving together, which of the following statements must be true? Choose all that apply. When two objects are in contact, moving together, which of the following statements must be true? Choose all that apply.

Oxygen makes up the largest part of living cells at 65%. What is the percentage of the second-most abundant element in living cells?

Acceleration is defined as the rate of change for which of the following? A. time B. velocity C. position D. displacement

What are 3 characteristics of a tornado?

Which list shows the element symbols of the 6 biological elements?

A space probe produces a radio signal pulse. If the pulse reaches Earth 12.3 seconds after it is emitted by the probe, what is the distance from the probe to Earth?