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Nitella [24]
3 years ago
12

Why are SI units helpful for describing objects? A. They are the standard used by scientists worldwide. B. They are more accurat

e. C. They do not measure quantity. D. They are more precise.
Physics
1 answer:
Ganezh [65]3 years ago
7 0

They are the standard system used by scientists worldwide, and
officially by almost all nations of the world.  So if you describe a
measurement in terms of SI units, there's less chance that you'll
need to explain the measurement to anyone who reads it ...
most scientists and common people worldwide will understand
what your number means.

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Q C During a solar eclipse, the Moon, the Earth, and the Sun all lie on the same line, with the Moon between the Earth and the S
lianna [129]

The force exerted by the Sun on the Earth is =3.557 \times 10^{22}

<h3>What is the Netwon law of the gravity state?</h3>

Newton's law of gravity states that the force executed by a body on another body is calculated

$F=\frac{G \cdot m_1 \cdot m_2}{d^2}$

<h3>What is universal gravitation?</h3>

The universal gravitation constant

$G=6 \cdot 67 \times 10^{-11} \cdot \mathrm{m}^3 \cdot 8^{-2} \cdot \mathrm{kg}^{-1}$

Here we know that

The mass of the sun is $m_s=2.0 \times 10^{30} \mathrm{~kg}$ is the

The mass of the moon is $m_M=7.3 \times 10^{22} \mathrm{~kg}$

The mass of the Earth is $m_E=6.0 \times 10^{24} \mathrm{kg}$

The distance between the Sun and the Earth is

$$d_{S E}=1.5 \times 10^{11} \mathrm{~m}$$

The distance between the earth and the moon is

$$d_{E M}=3.85 \times 10^8 \mathrm{~m} \text {. }$$

Here the calculation is:

F_{S E}=\frac{G \cdot m_S \cdot m_E}{\left(d_{S E}\right)^2}

$=\frac{6.67 \times 10^{-11} \times 2.0 \times 10^{30} \times 6.0 \times 10^{24}}{\left(1.5 \times 10^{11}\right)^2}$

$=\frac{80.04 \times 10^{43}}{1.5^2 \times 10^{22}}=\frac{80.04 \times 10^{21}}{2.25}$

=3.557 \times 10^{22}

To learn more about quadratic equations, refer: brainly.com/question/21570007

#SPJ4

3 0
2 years ago
A student investigated how length affects resistance of a wire.
Mrac [35]

Answer:

X is ammeter and Y is voltmeter

Explanation:

The resistance of a wire is directly proportional to the length of the wire. That is the longer the length of the wire, the higher the resistance and the shorter the length of the wire, the smaller the resistance.

Ammeter is a measuring instrument used to measure the current in a circuit by connecting the meter in series with the circuit.

Ammeter is a measuring instrument used to measure the potential difference between two points by connecting the meter in parallel to the points.

Meter X is an ammeter since it is connected in series and meter Y is a voltmeter because it is connected in parallel.

4 0
3 years ago
When jumping straight down, you can be seriously injured if you land stiff-legged. One way to avoid injury is to bend your knees
choli [55]

Answer:

a)  F = 1.26 10⁵ N, b)  F = 2.44 10³ N, c)   F_net = 1.82 10³ N  directed vertically upwards

Explanation:

For this exercise we must use the relationship between momentum and momentum

         I = Δp

         F t = p_f -p₀

a) It asks to find the force

as the man stops the final velocity is zero

         F = 0 - p₀ / t

the speed is directed downwards which is why it is negative, therefore the result is positive

         F = m v₀ / t

         F = 63.5 7.89 / 3.99 10⁻³

         F = 1.26 10⁵ N

b) in this case flex the knees giving a time of t = 0.205 s

          F = 63.5 7.89 / 0.205

          F = 2.44 10³ N

c) The net force is

         F_net = Sum F

         F_net = F - W

         F_net = F - mg

let's calculate

         F_net = 2.44 10³ - 63.5 9.8

         F_net = 1.82 10³ N

since it is positive it is directed vertically upwards

6 0
3 years ago
A flea may live on the skin of a dog and feed on the dog's blood. This relationship between the flea and the dog is an example o
AlexFokin [52]
I think it might be a Parasite
8 0
3 years ago
Read 2 more answers
How does the height the ball is released affect the amount of potential energy
aleksley [76]
The potential energy is directly proportional to the height.
If you double the height you double the potential energy.
5 0
3 years ago
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