Answer:
20 J
Explanation:
as volume remains constant hence work done is zero
internal energy = heat given to system -work done by system
= 20 J -0
= 20 J
Answer:
A
Explanation:
the higher the specific heat, the more insulator like it is. the lower the heat capacity, the more conductor like.
The vehicle's centripetal acceleration is equal to 22.5m/s²
Radius, r = 10 meter
Speed, V = 15 m/s
To ascertain the car's centripetal acceleration
A(c) = V²/R
We obtain the following when we enter the formula's parameters:
A(c) = 152/10
A(c) = 225/10
A(c) = 22.5m/s²
<h3>What is Centripetal acceleration ?</h3>
When an item moves in a circular route, one of its motion characteristics is centripetal acceleration. Any motion in a circle with an acceleration vector pointing in the direction of the circle's centre is referred to as centripetal acceleration.
- Centripetal forces cause accelerations at the centripetal axis. With the exception of the Earth's rotation around the Sun, any satellite's circular motion around a celestial body is brought on by the centripetal force produced by their mutual gravitational pull.
Hence, Centripetal acceleration is
22.5 m/s²
Learn more about Centripetal acceleration here:
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Answer:
1.2703 km
Explanation:
The speed can be calculated using the formula;
Speed (m/s) = distance (m) ÷ time (s)
Based on the information in this question, it took 3.7 seconds for a sound with speed of 1236 km/h to reach John. The distance will be:
Distance = speed × time
However, we need to convert the time in seconds (s) to hour (hr).
1 second = 0.000277778 hour
3.7 seconds = 0.00102778 hours.
Hence,
distance = 1236 × 0.00102778
Distance = 1.2703 km
Answer:
Time taken = 10400 s
Explanation:
Given:
Initial speed of the train,
Final speed of the train,
Displacement of the train,
Using Newton's equation of motion,
Now, using Newton's equation of motion for displacement,
Now, plug in the value of in the above equation. This gives,
Now, plug in 234000 m for , 25 m/s for and 20 m/s for . Solve for .
Therefore, the time taken by the train is 10400 s.