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4 years ago

Plz, help me! I will give brainliest

Physics

2 answers:

iVinArrow [24]4 years ago

8 0

Answer:

Its B.

Explanation:

I don't really know how to explain it but thats the answer.

Viktor [21]4 years ago

3 0

It’s A liquid to a solid because if it’s a liquid they can move but not much and then it becomes a solid because they are packed closely together and are fixed in one position.

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A cube measures 3 cm on each side and has a mass of 25 g. What is its density.

Snowcat [4.5K]

Answer:

The density is: $0.926 \,\frac{g}{cm^3}$

Explanation:

Recall that density is defined as the quotient of the object's mass divided by volume. So, we calculate the volume of the 3 cm side cube:

$Vol = (3 \,cm)^3 = 27 \,\,cm^3$

then the density becomes:

$density=\frac{mass}{Vol} =\frac{25}{27} \,\frac{g}{cm^3} \approx 0.926 \,\frac{g}{cm^3}$

7 0

4 years ago

What are the 3 Laws of Newtonian Mechanics

Katyanochek1 [597]

In the first law, an object will not change its motion unless a force acts on it. In the second law, the force on an object is equal to its mass times its acceleration. In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction

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3 years ago

Read 2 more answers

1. _____ determines the amount of force required to overcome the inertia of an object

Ainat [17]

Answer:

mass determines the amount of force required to overcome the inertia of an object.

4 0

3 years ago

A parallel plate capacitor is made of two large plates ofarea

Murrr4er [49]

Answer:

$C = \frac{\epsilon_0 \epsilon_1 A}{\epsilon_0 t + \epsilon_1(a-t)}\\$

Explanation:

If there is a dielectric slab with thickness less than the distance between the plates is inserted inside a capacitor, then that capacitor can be regarded as two capacitors connected in series.

Let's assume that the slab is placed onto the lower side. So, the capacitance of that part of the capacitor, C1 is

$C_1 = \epsilon_1\frac{A}{t}$

where $\epsilon_1$ is the permittivity of the slab.

The other part of the capacitor is

$C_2 = \epsilon_0 \frac{A}{a-t}$

Two capacitors are connected in series:

$\frac{1}{C} = \frac{1}{C_1} + \frac{1}{C_2} = \frac{1}{\epsilon_1 \frac{A}{t}} + \frac{1}{\epsilon_0 \frac{A}{a-t}} = \frac{t}{\epsilon_1 A} + \frac{a-t}{\epsilon_0 A} = \frac{\epsilon_0 t + \epsilon_1 (a-t)}{\epsilon_0 \epsilon_1 A}\\C = \frac{\epsilon_0 \epsilon_1 A}{\epsilon_0 t + \epsilon_1(a-t)}$

If we know the charge of the plates, we could relate the potential V0 to capacitance via

$C = \frac{Q}{V_0}$

4 0

3 years ago

A car is traveling at a constant speed of 12m/s , when the driver accelerates the car reaches a speed of 26 m/s in 6s what is th

DaniilM [7]

Acceleration = (change in speed) / (time for the change)

Change in speed = (end speed) - (start speed)

Change in speed = (26 m/s) - (12 m/s) = 14 m/s

Time for the change = 6 s

Acceleration = (14 m/s) / (6 s)

Acceleration = (14/6) (m/s²)

<em>Acceleration = 2.33 m/s²</em>

7 0

4 years ago