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bulgar [2K]
3 years ago
13

Which condition will cause the pressure exerted by a gas in a closed container to increase?

Physics
1 answer:
Mumz [18]3 years ago
8 0
B

Pressure is force / area. The pressure of a gas in a container can be considered to be the force exerted on the area of the container by gas molecules. If the temperature is increased the gas molecules have more energy so collide with the walls more often and with more force causing pressure to increase.
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How are the energy conversions of machines similar to the energy conversions in your body
sleet_krkn [62]

Answer:

Explained below

Explanation:

When we eat food, our body gets chemical energy from it. Now, this chemical energy from the food is changed into some different energy forms that is useful to it. They include:

-Chemical to mechanical energy to aid in movement of muscles

- chemical to thermal energy to aid in regulating the body temperature.

- chemical to electrical energy to aid the brain in thinking.

Thus is similar to how a machine converts energy because machines also generate energy after being powered and convert to other forms of energy. For example, an alarm clock converts electrical energy to sound energy, hair dryer converts electrical energy to thermal/heat energy.

6 0
2 years ago
The force generated by a single muscle fiber can be increased by increasing is called
mars1129 [50]

Answer:

The force generated by a single muscle fiber can be increased by increasing the frequency of action potentials

Explanation:

The force generated by a muscle fiber is the result of the shortening of the skeletal muscle, and this force is also know as muscle tension. The larger motor units shorten along with the smaller units to produce the muscle force. The time lapsed between the beginning of the action potential in the muscle and the beginning of the contraction is the latent period. Action potential is the result of the difference electrical potential as a result of passage of an impulse along the membrane of a muscle or nerve cell.

4 0
3 years ago
A. In your own words, define what a transverse wave is.
olasank [31]

Answer:

a) From definition a transverse wave is which one where the elements moves perpendicular to the direction of the wave. For example is a wave is moving from the left to the right the elements would be wibrating or moving upward or downward.

We have a lot examples for a transverse wave. For example water waves, strings on the musical instruments , light and radio waves.

b) We can identify a transverse wave if the particles are displaced perpendicular to the direction of the wave. Usually these types of wave occur in elastic solids. And we can identify it when we see a pattern perpendicular between the wave direction and the particles motion. In simple words we need to see that the wave is moving down and up.

Explanation:

Part a

From definition a transverse wave is which one where the elements moves perpendicular to the direction of the wave. For example is a wave is moving from the left to the right the elements would be wibrating or moving upward or downward.

We have a lot examples for a transverse wave. For example water waves, strings on the musical instruments , light and radio waves.

Part b

We can identify a transverse wave if the particles are displaced perpendicular to the direction of the wave. Usually these types of wave occur in elastic solids. And we can identify it when we see a pattern perpendicular between the wave direction and the particles motion. In simple words we need to see that the wave is moving down and up.

3 0
3 years ago
an engineer is developing a conveyor belt to help move heavy boxes in factories. The device should be able to move boxes from th
Elena-2011 [213]

Answer:

This conveyor belt should be connected to fixed pulleys in case their total effort is less than the load. But if it's not that, the belt should be connected to movable pulleys.

Explanation:

.

4 0
2 years ago
A rectangular metal tank with an open top is to hold 171.5 cubic feet of liquid. what are the dimensions of the tank that requir
Semmy [17]
To minimize the material usage we have to have the volume requested with the minimum surface area.
The volume is:
171.5 =xyz
And the surface is:
S=xy+2xz+2yz
From the first equation we get:
z=\frac{171.5}{xy} ; k=171.5\\ z=\frac{k}{xy}\\
I will use k instead of a number just for the conveince.
We plug this into the second equation and we get:
S=xy+2k\frac{1}{x}+2k\frac{1}{y}
To find the minimum of this function we have to find the zeros of its first derivative.
Sx will denote the first derivative with respect to x and Sy will denote the first derivative with respect to Sy.
S_x=y-2k\frac{1}{x^2}\\ S_y=x-2k\frac{1}{y^2}
Now let both derivatives go to zero and solve the system (this will give us the so-called critical points).
0=y-2k\frac{1}{x^2}\\
0=x-2k\frac{1}{y^2}\\
y=2k\frac{1}{x^2}\\
x=2k\frac{1}{y^2}\\
Now we plug in the first equation into the other and we get:
x=\frac{\frac{2k}{1}}{\frac{4k^2}{x^4}}\\
x^3=2k\\
x=(2\cdot171.5)^{1/3}\\
x=7

Now we can calculate y:
y=2k\frac{1}{x^2}\\
y=2\cdot 171.5\frac{1}{7^2}=7
And finaly we calculate z:
z=\frac{171.5}{xy}\\
z=\frac{171.5}{7\cdot7}=3.5
And finaly let's check our result:
V=xyz=7\cdot7\cdot3.5=171.5
4 0
2 years ago
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