A 100 g piece of aluminum is heated to 90°

c. it is then dropped into water to bring its temperature down to 20°

c. the heat transferred to water is 6300 j. what is the specific heat capacity of aluminum?

When the lever is pulled, 2 kg of carbon dioxide is ejected at a speed of 60 m/s. The remaining mass of the person, chair, and cylinder is 80 kg. After the ejection, how fast will the chair be moving? Select the best answer from the choices provided.

All electromagnetic waves

In understanding the trait of shyness, a behavioral geneticist will argue that: 1. genetics will determine two levels of shyness and environmental factors will determine which one actually occurs. 2. the influence of genetics on shyness is fixed. 3.

A battery does 2.186 J of work to transfer 0.033 C of charge from the negative to the positive terminal. What is the emf of this battery?

How do the nuclei of different isotopes of an element vary?

A gate in an irrigation canal is constructed in the form of a trapezoid 2 m wide at the bottom, 38 m wide at the top, and 2 m high. It is placed vertically in the canal so that the water just covers the gate.

A machine with a mechanical advantage of 10 is used to produce an output force of 250 newtons. What input force is applied to this machine

Why do you float in space

How does physical change affect the identity of a substance

A scientist pours grape juice on three identical white shirts He then uses three different cleaning products on the shirts and measures how clean they get what is the independent variable in this experiment