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3 years ago

Gravity is a force that helps to hold the universe together.true or false

Physics

2 answers:

Valentin [98]3 years ago

7 0

Yes, this is a true statement.

gravity is so important.

Pie3 years ago

5 0

Answer:

True

Explanation:

Gravity is a force that helps to hold the universe together. The statement is true. The gravitational force is always attractive in nature. It depends on the masses and the distance between them. Mathematically, it is given by :

$F=G\dfrac{m_1m_2}{d^2}$

Where

G = universal gravitational constant

m₁ and m₂ are masses

d is the distance between them

Gravity is responsible to hold the planets in an orbit around the sun. Ocean tides are also caused due to gravitational pull of the moon. If gravity is not present in the universe then there would be no moon, no stars etc.

Hence, the given statement is true.

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Help me with number 3 and 4 pleaseeeeeeeee

Andrej [43]

i think its b cause if you were talking about ice it freezes the melts the evaporates to gas

6 0

3 years ago

Read 2 more answers

IM A plastic sphere floats in water with 50.0% of its volume submerged. This same sphere floats in glycerin with 40.0 \% of its

arsen [322]

Density of glycerin is 5/4 times water density.

Density of the sphere is 1/2 times water density.

<h3>How to find the density of sphere floats and glycerin?</h3>

Density is defined as the ratio of mass to volume, that is density is the amount of mass per unit of volume.

A substance's density exist defined as its mass per unit of volume. Density is most frequently represented by the symbol, however Latin letter D may also be utilized. If the mass or volume of an object is altered, the density of the thing may also change. Water, for example, has a specific density. An object will sink if its density exists greater than that of water; it will float if its density is lower.

Since a plastic sphere floats in water with 50% of its volume submerged.

So, the Density of the sphere = 1/2× water density

Since the same sphere floats in glycerin with 40% of its volume submerged.

So, the Density of the sphere = 4/100 × Glycerin density

= 2/5 × Glycerin density

Density of Glycerin = 5/2 of sphere density

Density of glycerin = 5/2 × 1/2 × water density

Density of glycerin = 5/4 × water density

To learn more about the volume of sphere floats refer to:

brainly.com/question/10827296

#SPJ4

6 0

1 year ago

You take the same 3 kg metal block and slide it along the floor, where the coefficient of friction is only 0.4. You release the

spin [16.1K]

Answer:

1.52905 seconds

4.58715 m

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

$\mu$ = Coefficient of friction = 0.4

g = Acceleration due to gravity = 9.81 m/s²

a = Acceleration = $\mu g$

Equation of motion

$v=u+at\\\Rightarrow t=\frac{v-u}{\mu g}\\\Rightarrow t=\frac{0-6}{-0.4\times 9.81}\\\Rightarrow t=1.52905\ s$

It will take 1.52905 seconds for the block to slow down

$v^2-u^2=2as\\\Rightarrow s=\frac{v^2-u^2}{2\mu g}\\\Rightarrow s=\frac{0^2-6^2}{2\times 0.4\times -9.81}\\\Rightarrow s=4.58715\ m$

The block will travel 4.58715 m before it stops

7 0

3 years ago

Coal is how much worse than natural gas when it comes to carbon dioxide emissions?

Naya [18.7K]

Answer:

True

Explanation:

Its worse

4 0

3 years ago

An electron acquires 13.0 × 10-16 j of kinetic energy when it is accelerated by an electric field from plate a to plate

andre [41]

solution:

the kinetic energy acquired by the electron when it is accelerated y an electric field is

k=5.25\times10^-16j

the kinetic energy acquired by the electron will ne proportional to the potential difference between the plates across which the electric field is applied.it is given by,

e\Delta v = k

here,\delta v is the potential difference between the plates, e is the charge on an electron and k is the kinetic energy.

reassange the above expression

\delta v = \frac{k}{e}

the potential difference between the plates will be

\delta v = \frac{k}{e}

sunstitute 5.25 \times 10^-16j for k and 1.6 \times10^-19c for e is the above equation

\delta v =\frac{5.25\times10^-16j}{1.60\times10^-19c}

=3.28\times10^3v(\frac{1kv}{1000v})

=3.28kv

since the electrons will e accelerated towards the plate at higher potential.

hance p;ate b will be at higher potential

3 0

3 years ago