Which is not part of a DC motor?

coil of wire

magnet

compass

brush

commutator

A material is said to be ductile if it

In the calorimetry experiment which energy will be calculated during the heat exchange if water is used?

Which one of the following is the pigment found in redheads? a) Keratin b) Melanin c) Pheomelanin d) Cortex

N a presentation about measuring mass, one of your classmates states, "Two objects of the same size will always have the same mass." Is this statement correct? Why or why not?

What is the "address" of the earth in the Cosmo

Which of the following is a vector quantity? A. 83 ounces of liquid B. 55 km/hr in a truck C. 15 seconds of travel D. 10 m/s down

Which of the following best describes the ultraviolet catastrophe of blackbody radiation? A. As energy is added to an object acting as a blackbody radiator, its emissions move to the ultraviolet part of the electromagnetic spectrum. B.

Is an engine-activated booster unit that reduces the effort required to apply the hydraulic brakes

A box is lowered using a rope. If the acceleration of the box, is 2.5 m/s2 (downward) and the tension in the rope is 31 N, what is the mass of the box (in kg) ?

On a very hot summer day, the rooms on the first floor of a house stay cooler than the rooms on the second. Which form of thermal energy flow causes this to occur? A) Conduction B) Convection C) Kinetic D) Radiation