PHYSICS MIDDLE SCHOOL

A source of wave produces 20 crest sand 20 troughs in 0.4 sec. Find the frequency of the wave.

Answers

Answer 1
Answer:

1 whole wave is 1 crest and 1 trough.

20 crests and 20 troughs is 20 whole waves.

20 waves / 0.4 seconds = 50 waves per second.

Frequency = 50 Hz

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Explain how if two cases are side by side on a shelf one an have more potential energy

Answers


Potential energy = (mass) x (gravity) x (height).

Even if the two objects are at the same height, the one
with more mass has more potential energy.

Any clue on this one please help

Answers

The third one is your answer

Compare an contrast a cell to a human body

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Cells make up the Tissue, which make up our Organs, which make our Organ Systems, Which make us our bodies. They make us up and are alive. They grow, feed, reproduce, and die. The main difference between our size would be our levels of complexity.
this is the answer
i think so 
does it help?

What will happen to the mass and volume of a block if their is two blocks, three, blocks or four blocks? For example, if the mass of a block is 7g and the volume is 15.625, what will that be if more blocks are added? Please help it is much apreciated!

Answers

To solve this problem, it would be helpful to know the density of 1 block Density is defined as the mass of the substance per volume. From the example given, The density of the block is (7g)/(15.625 units^3) or 0.448 g/units^3. So, if a block is added, the new mass is 7g + 7g = 14 g And the volume 14 g /(density) = 1 unit^3

What is bacteria bigwig

Answers

A bacteria bigwig is a chemical found in all living things and therefore an indicator of bacteria


I hope that's help !

after the car leaves the platform , gravity causes it to accelerate downward at a rate of 9.8 m/s2. what is the gravitational force on the car?

Answers


The gravitational force on the car is the force popularly known
as the car's "weight".  Its magnitude is

            (9.8 m/s²) times (the car's mass, in kilograms) .

The unit of this quantity is [newton] .
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