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Masteriza [31]
3 years ago
13

3. When a person is outside of the system and they add energy to the

Physics
1 answer:
NISA [10]3 years ago
5 0

Answer:

We show added energy to a system as +Q or -W

Explanation:

The first law of thermodynamics states that, in an isolated system, energy can neither be created nor be destroyed;

Energy is added to the internal energy of a system as either work energy or heat energy as follows;

ΔU = Q - W

Therefore, when energy is added as heat energy to a system, we show the energy as positive Q (+Q), when energy is added to the system in the form of work, we show the energy as minus W (-W).

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A rectangular block of steel measures 4cm*2cm*1.5cm*. its mass is 93.6g
nata0808 [166]

Answer:

b

Explanation:

5 0
3 years ago
A student compared some soccer players to the atoms in the gaseous state. Which of the following activities were the soccer play
tensa zangetsu [6.8K]

Answer:

The answer will be <em>D</em>

Explanation:

I choose answer <em>C</em> and got it wrong on the test. Also Liquid atoms vibrate fast and slide past each other. what answer <em>C </em>shows is a gas.

8 0
3 years ago
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if a sports car can go from 0 to 60 mph in 3.8 seconds, what would be it's final speed after 6 seconds if it's starting speed wa
erma4kov [3.2K]
Verrrrrry interesting !

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

The car's acceleration is  (60 mph) / (3.8 sec)  = (60/3.8)  mile/hr-sec .

Final speed = (original speed)  +  (acceleration · time)

                 = (30 mi/hr)  +  (60/3.8  mi/hr-sec)·(6 sec)

                 = (30)mi/hr  +  (360 / 3.8)mi/hr

                 =      124.7 mph .
4 0
3 years ago
A particle moves along a straight line with an acceleration of a = 5&gt;(3s 1&gt;3 + s 5&gt;2) m&gt;s2, where s is in meters. De
Len [333]

Answer:

v=1.295

Explanation:

What we are given:

a=5÷(3s^(1/3)+s^(5/2)) m/s^2

Start by using equation  a ds = v dv

This problem requires a numeric method of solving. Therefore, you can integrate v ds normally, but you must use a different method for a ds The problem should look like this:

\int\limits^a_b {x} \, dx

<em>a=2</em>

<em>b=1</em>

<em>x=5÷(3s^(1/3)+s^(5/2)) </em><em>m/s^2</em>

<em>dx=dv</em>

Integrate the left side the standard method.

\int\limits^a_b {x} \, dx

<em>a=v</em>

<em>b=0</em>

<em>dx=dv</em>

<em>Integrating</em>

=v^2/2

Use Simpson's rule for the right site.

\int\limits^a_b {x} \, dx

<em>a=b</em>

<em>b=a</em>

<em>x=f(x)</em>

f(x)=b-a/6*(f(a)+4f(a+b/2)+f(b)

If properly applied. you should now have the following equation:

v^2/2=5[(1/6*(0.25+4(0.162)+(0.106)]

        =0.8376

Solve for v.  

      v=1.295

5 0
3 years ago
PLEASE PLEASE HELP!!
boyakko [2]

Answer:

you have patience the distance.

Explanation:

the train leaves at 6.30.

3 0
2 years ago
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