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vesna_86 [32]
2 years ago
7

haun wants to enter the science fair at his school. he has a list of ideas for his project. which questions could be answered th

rough scientific investigations. check all that apply
Physics
1 answer:
Allisa [31]2 years ago
6 0

Correct Answer:

- Does pressure have an effect on the volume of a gas?

- Which brand of soap is the best for cleaning grease off dishes?

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A 12 kg barrel is pulled up by a rope. The barrel accelerates at 1.2 m/s2. Find the force exerted by the rope. Show all your wor
IgorLugansk [536]

Answer:

F = 132N

Explanation:

Let the pulling force be F

Given the mass of the barrel is 12 Kg and The acceleration is 1.2 m/sec^2

We know that Net Force = mass\times acceleration

Now net force = F - mg

F - mg = ma

F = mg + ma

F = m(a+g) = 12\times (1.2 +9.8)=132N  

Note that there will be a downward force acting on the body which is equal to mg

3 0
3 years ago
S.I. Units Ampere is use for what? ​
lawyer [7]

The ampere (symbol: A) is the SI base unit of electric current equal to one coulomb per second.

The ampere is that constant current which, if maintained in two straight parallel conductors of infinite length, of negligible circular cross section, and placed 1 meter apart in vacuum, would produce between these conductors a force equal to 2 times 10–7 newton per meter of length.

Electric current is the time rate of change or displacement of electric charge.

One ampere represents the rate of 1 coulomb of charge per second.

The ampere is defined first (it is a base unit, along with the meter, the second, and the kilogram), without reference to the quantity of charge.

The unit of charge, the coulomb, is defined to be the amount of charge displaced by a one ampere current in the time of one second.

This is your answer friend. Hope it helps you.

3 0
3 years ago
21. (a) Aircraft sometimes acquire small static charges. Suppose a supersonic jet has a 0.500-μC charge and flies due west at a
beks73 [17]

Answer:

Explanation:

The picture attached shows the full explanation and i hope it helps. Thank you

6 0
3 years ago
A virtual image produced by a lens is always
Sever21 [200]
C. located in front of the lens
3 0
3 years ago
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Convert 500,000 inches into miles
olga nikolaevna [1]

Answer: 7.89141414

Explanation:

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3 years ago
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