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enyata [817]
4 years ago
8

Indicate whether the statement is true or false. The point located at the geometric center of an object is called the object's c

enter of gravity.
a. True
b. False
Physics
1 answer:
zmey [24]4 years ago
4 0
This statement is true. The point located at the geometric center of an object is indeed called the object's center of gravity. Center of gravity is the average of the weight of a resultant of the parallel forces, including all the particles that is passing through its body.
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Magma that cools and crystallizes on Earth's surface forms 
Nostrana [21]

The correct answer is:

D. Extrusive rocks.

The explanation:

when extrusive igneous rocks form when magma reaches the Earth's surface a volcano and cools quickly. Most extrusive (volcanic) rocks have small crystals. Examples include basalt, rhyolite, andesite, and obsidian.

6 0
4 years ago
Read 2 more answers
What's the kinetic energy of an object that has a mass of 30 kilograms and moves with a velocity of 20m/s?
icang [17]

Ek = 6KJ.

In physics, the kinetic energy of a body or object is the one that owns due to its movement and is given by the equation E_{k} = \frac{1}{2} mv^{2}, where m is the mass of the object in kilograms and v is the velocity in m/s.

An object that it has a mass of 30 kilograms and moves with a velocity of 20m/s, its kinetic energy is given by:

E_{k} = \frac{1}{2} (30kg)(20m/s)^{2}=6000J=6KJ

4 0
3 years ago
A 0.16 kg billiard ball moving at 1.20 m/s collides elastically with one of the same mass at rest. It continues at a speed of 0.
Rainbow [258]
Use energy conservation to calculate the speed!
Total kinetic energy before collision = total kinetic energy after the collision.
5 0
3 years ago
A column of soldiers, marching at 114 steps per minute, keep in step with the beat of a drummer at the head of the column. It is
kipiarov [429]

Answer:

length of column is 140.42 m

Explanation:

in 1 min the soldiers travels 114 steps

so to complete 1 step the time taken by the soldiers =

t =  \dfrac{1\ min}{114}

t =  \dfrac{60}{114}  

t = 0.526 s

speed of sound = 343 m/s

length of the column = v × t

                                   = 343 m/s × 0.526 s

                                   = 140.42 m

hence the length of column is 140.42 m

5 0
3 years ago
Is the measurement of the density of a substance as compared to water.
Ilya [14]
C. Specific gravity is the answer
8 0
3 years ago
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