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3 years ago

When you push down on a block resting on a table, block atoms and table atoms that are in contact with one another

2 answers:

5 0

Maintain their positions.

Solids are incompressible, just like liquids. The electrostatic forces between the atoms of block and the atoms of table prevent the two objects from moving into one another.

Ulleksa [173]3 years ago

3 0

Answer:

<h2>A. maintain their positions.</h2>

Explanation:

Both objects maintain their position, because the force being applied is in vertical direction, since that is a push down, the reaction force of the table upwards the block doesn't allow movement at all.

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What does the frequency of a wave represent?

maksim [4K]

Answer:

B. The number of wave cycles that pass through a specific point within a given time period.

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3 years ago

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Why is copper a pure substance? A. Because it is an element B. Because it is a compound C. Because it is a homogenous mixture

expeople1 [14]

A) because it is an element.
Explanation: usually when they say pure substance they mean pure element.
Hope this helped!! :)

3 0

3 years ago

if the amount of work done remains constant but occurs over less time how does this affect the amount of power exerted?

Aneli [31]

Answer:

The amount of power will be increased.

Explanation:

If the work remains constant but the time is reduced the power increases. Since power is defined as the relationship between work overtime. By means of the following equation, we can see this relationship.

$P=W/t$

where:

P = power [Watts]

W = work [J] (units of joules)

t = time [s]

Let's assume with an example the above written.

If we have an electric motor that exerts a work of 950 [J], and the time used is 5 [s], the power is:

$P = 950/5\\P = 190 [W]$

Now if we want to accelerate the work done and use 2 seconds for the time, we will have:

$P=950/2\\P=475 [W]$

5 0

3 years ago

What is the maximum energy EmaxEmaxE_max stored in the capacitor at any time during the current oscillations

DanielleElmas [232]

Complete Question

An L-C circuit has an inductance of 0.350 H and a capacitance of 0.290 nF . During the current oscillations, the maximum current in the inductor is 2.00 A .

What is the maximum energy $E_{max}$ stored in the capacitor at any time during the current oscillations?

Express your answer in joules.

Answer:

The value is $E_{max} = 0.7 J$

Explanation:

From the question we are told that

The inductance is $L = 0.350 \ H$

The capacitance is $C = 0.290 \ nF = 0.290 *10^{-9 } \ F$

The current is $I = 2 \ A$

Generally the maximum energy is mathematically represented as

$E_{max} = \frac{1}{2} * L * I^2$

=> $E_{max} = \frac{1}{2} * 0.350 * 2^2$

=> $E_{max} = 0.7 J$

3 0

4 years ago

Find α, the angular acceleration of the wheel, which results from F⃗ pulling the string to the left. Use the standard convention

kap26 [50]

Answer:

α = F/(k×m×r)

Explanation:

When the wheel is pulled to turn in a counterclockwise direction, the wheel will have a moment of inertia given by Iw = k×m×r²

Where k = the radius of gyration of the wheel which is a dimensionless quantity less than one.

m = the mass of the wheel

r = the radius of the wheel

First and foremost, we relate the torque (τ) about the axle of the wheel to the force (F) applied on the wheel and we have that τ = r × F

We then relate the torque on the wheel to the angular acceleration (α), we have that τ = Iw × α, where Iw is the moment of inertia of the wheel as explained above

Substituting for torque τ and moment of inertia I into the above equation we have that

r × F = k×m×r² × α

solving for α we have that

α = r × F /(k×m×r²)

Therefore

α = F/(k×m×r)

8 0

4 years ago