PHYSICS MIDDLE SCHOOL

Which statement is the BEST definition of an atom? A) Anything that has mass and occupies space. B) The smallest particle that has the properties of an element. C) A substance that cannot be broken down chemically into simpler substances. Eliminate D) The smallest unit of a substance that exhibits all of the properties characteristic of that substance.

Answers

Answer 1

Answer:

the answer is d because an atom is the smallest unit of a substance

Answer

the anser is (C) as 240 Watt

Explanation

As we know that

$Power= Work/Time$

$Work = Force * Distance$

As given in question

Force = 150 N

Distance = 4m

Then work is

$Work = 150 * 4 Nm$

$Work = 600 Nm$

$Power= 600/2.5$

$Power= 240 Watt$

So the answer is 240 watt

Which of the following objects would transfer heat by convection?A. oxygen
B. ice cube

Answers

Answer:

oxygen

Explanation:

I just did the assignment and that was the right answer.

Water moves from Earth's surface to the atmosphere and back to Earth's surface again in a process known as the water cycle. Which of the following is the major form of energy driving the water cycle?A. nuclear energy
B. geothermal energy
C. solar energy
D. chemical energy