All categories

2 years ago

Calculate the power of a train that uses 2MJ of chemical energy in 4 seconds.

Physics

1 answer:

nadya68 [22]2 years ago

6 0

Answer:

500 kW

Explanation:

Given that,

Energy of the train, E = 2 MJ = 2×10⁶ J

Time, t = 4 seconds

We need to find the power of the train. We know that,

Power = energy/time

So,

$P=\dfrac{2\times 10^6}{4}\\\\P=500000\ W\\\\or\\\\P=500\ kW$

So, the power of the train is equal to 500 kW.

You might be interested in

Will mark brainliest

Genrish500 [490]

The blue line with triangles are a cold front. The red line with half circles are a warm front. The black H is high pressure. The black L is low pressure. The black dot is overcast skies. Finally the white circle with a line down and 4 lines off of that line is 40-knot wind

idk and dont understand

8 0

3 years ago

All pressure topics in physics

AfilCa [17]

Absolute, Atmospheric, Differential, and Gauge Pressure

5 0

2 years ago

How does Ben and Jerry's total displacement compare to their distance traveled?

Sladkaya [172]

Answer:comparing the total displacement and tota distance covered by Ben Jerry.

Explanation:

Total distance travelled by both is;

m+n=z

Total displacement of both is;

x+y=z

Therefore;

comparing equation 1 and 2;

x+y=m+n

5 0

3 years ago

A resistor, an inductor, and ideal battery, and a switch are connected in series. Just after the switch is closed, which of the

Marianna [84]

Answer:

b) the current and the voltage across the resistor

Explanation:

As soon as we close the switch then the current in the circuit will be zero because the inductor connected in series will not allow to change the current through it due to its inertial property

Since initial current through the inductor is zero so after connecting the key the current will still remains zero and then it will start increasing

The equation for current is given as

$i = i_o(1 - e^{-Rt/L})$

so as soon as the key is closed the current in the circuit is zero and hence the voltage across the resistor is also zero as we know

$V_r = i R = 0$

so correct answer will be

b) the current and the voltage across the resistor

5 0

3 years ago

What happens when there is fluvial erosion?

Harman [31]

<span>This is the FBI we have found you guys out. We know you have been trafficking humans and drugs. We have agents outside of all your houses. We advice you to go outside with your hands behind your head, or we will use deadly force. Please, make this easy for us and yourself

</span>

8 0

3 years ago