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Reika [66]
3 years ago
8

20

Physics
1 answer:
Pani-rosa [81]3 years ago
4 0
The total displacement is 4.0 m east.
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Newton's law of universal gravitation states that every object in the universe attracts every other object. true or false.
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True,According to Isaac Newton believes that Gravity is responsible for drawing attraction which is directly proportional to product of their masses but inversely proportional  to the square  of the distance between them.
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3 years ago
Read 2 more answers
Calculate the magnitude of the gravitational force exerted by the Moon on a 79 kg human standing on the surface of the Moon. (Th
Luden [163]

Answer:

F= 134.92 N

Explanation:

Given that

The mass of the moon ,M = 7.4 x 10²² kg

The mass of the man ,m = 79 kg

The radius ,R= 1.7 x 10⁶ m

The force exerted by moon is given as

F=G\dfrac{Mm}{R^2}

Now by putting the values in the above equation we get

F=6.67\times 10^{-11}\times \dfrac{79\times 7.4\times 10^{22}}{(1.7\times 10^6)^2}\ N\\F=134.92 N

Therefore the force will be 134.92 N.

F= 134.92 N

8 0
4 years ago
The specific gravity of an material is defined as the ratio of the density of the material to the density of water. The specific
Alexandra [31]

The percentage of the iceberg that is visible above the water's surface will be 11.5%.

<h3>What is density?</h3>

Density is defined as the mass per unit volume. It is an important parameter in order to understand the fluid and its properties. Its unit is kg/m³.

The mass and density relation is given as

mass = density × volume

Density of ice = 917 kg/m³

Density of the seawater=1025 kg/m³

The ratio by which the iceberg submerge is found as;

\rm  \frac{V_S}{V} =\frac{\rho}{\rho_0} \\\\ \frac{V_S}{V} =\frac{917}{1025} \\\\ \frac{V_S}{V} =.895

Hence,89.5 % of the ice is submerged.

The percentage of the iceberg that is visible above the water's surface is;

⇒1-.89.5 %

⇒11.55 %

Hence, the percentage of the iceberg that is visible above the water's surface will be 11.5%.

To learn more about the density refers to the link;

brainly.com/question/952755

5 0
3 years ago
Which of the following is an example of a healthy behavior?
Greeley [361]

Answer moderate alcohol can be good for you health

Explanation: but I wouldn't do none of those things to be honest

SMARTEST

7 0
3 years ago
A 45.0 - kg girl is standing on a 150. - kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a
Mrac [35]

Answer:

The velocity relative to the surface of the ice is 6.5 m/s.

Explanation:

Given that,

Mass of girl m= 45.0 kg

Mass of plank M= 150 kg

Velocity = 1.50 m/s

We need to calculate the velocity relative to the surface of the ice

Using conservation of momentum

mv_{1}+Mv_{2}=(m+M)v

Here, v_{2}=0 because plank at rest

v_{1}=\dfrac{m+M}{m}\times v

Put the value into the formula

v_{1}=\dfrac{45+150}{45}\times1.50

v_{1}=6.5\ m/s

Hence, The velocity relative to the surface of the ice is 6.5 m/s.

6 0
3 years ago
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