PHYSICS MIDDLE SCHOOL

Which object below involves two energy transformations when used?a) A radio plugged into an electrical outlet


b) A toaster


c) A battery-operated remote control car


d) A blender

Answers

Answer 1
Answer: A battery-operated remote control car

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Archimedes' principle says that a 15 N object is buoyed up by a force that is

Answers

Answer:

  • equal to the weight of the fluid that the body displaces

Explanation:

Archimides' principle states the definition of buoyant force.

These are the imporant features of the buoyant force that you need to know:

  • Except for the very special vacuum condition, every body is immersed in a fluid.

  • The body is subject, at least, to two forces, its weight and the buoyant force.

  • The weight is the result of the gravitational attraction exerted by the planet, and is equal to the mass of the object by the gravitational acceleration (approximately 9.8 m/s² on Earth). It is directed vertically downward.

  • The buoyant force is the vertical upward force that the fluid exerts on the object and is equal to the weight of the volume of fluid displaced by the object.

  • The volume of fluid that the body displaces is equal to the immersed volume of the body.

Answer:

an immersed object is buoyed up by force equal to the weight of the fluid it displaces

What makes oil a nonrenewable resource?

Answers

Because it is a fossil fuel.

You push a friend sitting on a swing she has a mass of 50 kg and accelerates a rate of 4 m/s2 find the force you exerted

Answers

Force exerted: 100

To find force you multiply the mass by acceleration. The formula is
F = Ma, and the SI unit for force is newtons.

Gold alloys are _____.much harder than pure gold
do not last as long as pure gold
much more valuable than pure gold
much softer than pure gold

Answers

Much harder then pure gold.

The streams and small rivers that feed into a main river are called

Answers

Tributary is what u call a small river that flows into a larger river

Answer:

Tributaries

Explanation:

Matter and energy can convert into each other. True False

Answers

the answer is True you can convert matter and energy

TRUE!!!!!!!

HOPE THIS HELPS YOU!
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