Answer:
<h2>50 km/hr</h2>Explanation:
The average speed of the car can be found by using the formula
d is the distance
t is the time taken
From the question we have
We have the final answer as
<h3>50 km/hr</h3>Hope this helps you
Five metal samples, with equal masses, are heated to 200 degrees Celcius. Each solid is dropped into a beaker containing 200 ml
2 answers:
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The linear momentum is given by . Here
is mass
is velocity of the body. Given mass and velocities as
Initial momentum is and final momentum is
.
The correct answer is (A)
Answer:
The current is reduced to half of its original value.
Explanation:
- Assuming we can apply Ohm's Law to the circuit, as the internal resistance and the load resistor are in series, we can find the current I₁ as follows:
- where Rint = r and RL = r
- Replacing these values in I₁, we have:
- When the battery ages, if the internal resistance triples, the new current can be found using Ohm's Law again:
- We can find the relationship between I₂, and I₁, dividing both sides, as follows:
- The current when the internal resistance triples, is half of the original value, when the internal resistance was r, equal to the resistance of the load.