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alex41 [277]
3 years ago
8

PLEASE HELP ME

Physics
1 answer:
ra1l [238]3 years ago
8 0
C should be the answer
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Newton first law of motion​
Kaylis [27]

Answer:

His first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. ... The amount of the change in velocity is determined by Newton's second law of motion.

6 0
3 years ago
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A traveling electromagnetic wave in a vacuum has an electric field amplitude of 98.9 V/m . Calculate the intensity ???? of this
Pani-rosa [81]

Answer:

intensity = 12.98 W/m^2

Energy = 3.93 J

Explanation:

As we know that the magnitude of electric field intensity is given as

E = 98.9 V/m

now we know that intensity of the wave is given as the product of energy density and speed of the wave

intensity = \frac{1}{2}\epsilon_0 E^2 c

intensity = \frac{1}{2}(8.85 \times 10^{-12})(98.9)^2(3\times 10^8)

intensity = 12.98 W/m^2

so intensity is the energy flow per unit area per unit of time

so the energy that flows through the area of 0.0259 m^2 in 11.7 s is given as

Energy = Area \times time \times intensity

Energy = 0.0259(11.7)(12.98)

Energy = 3.93 J

7 0
3 years ago
A plumber uses a spanner on a tap. She puts a force of 200N on the spanner 30cm from the tap. What is the size of the moment?
zaharov [31]

Answer:

60Nm

Explanation:

Given data

Applied force= 200N

length of spanner= 30cm to meter

= 30/100= 0.3m

We know that the formula for the moment is

P=Fl

that is

P= force * length

P= 200*0.3

P= 60Nm

Hence the moment is 60Nm

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3 years ago
What is the difference between velocity and acceleration and how do we find each one
katen-ka-za [31]

You know how speed is how fast distance changes ?

Well, velocity is speed PLUS the direction of the motion,
and acceleration is how fast velocity changes.

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3 years ago
The number of protons and neutrons in an atom is that atom’s _____________ number.
astraxan [27]

Answer:

The mass number of an atom is its total number of protons and neutrons. Atoms of different elements usually have different mass numbers , but they can be the same. For example, the mass number of argon atoms and calcium atoms can both be 40.

Explanation:

Please mark as brainliest

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4 years ago
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