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What is terminal velocity and what causes it?

Initially, when you drop an object the only force acting on it is gravity. This accelerates the object towards the ground. As the objects speed increases so does the force of air resitance acting on the o...

Answered by Calum L. • Physics tutor

1746 Views

Outline why a given mass of water has more internal energy than the same mass of ice at the same pressure?

To achieve maximum score, you are expected to define every term that you will use. Therefore in this case define internal energy (the sum of the potential and the (random) kinetic energy of the molecules ...

Answered by Balint P. • Physics tutor

2119 Views

In some SUVAT questions, they ask for 2 time solutions and I can only find 1. What am I missing?

Let's say we are trying to work out how long it will take for a ball to be caught after it has been thrown straight upwards. If we set the final displacement to be zero (S=0) and solve S=UT+0.5AT²

Answered by Christopher I. • Physics tutor

2612 Views

Two pellets are fired simultaneously from the horizontal, one is fired vertically at 100m/s and the other is fired at 200m/s at an angle theta from the horizontal. Calculate the angle of the second pellet if they both land at the same time.

For this problem, we can look at the two pellets individually. If we find the time taken for the first bullet to reach the ground again, then we know that it must take the same time for the second bullet ...

Answered by Christopher I. • Physics tutor

2925 Views

How does Einsteins explanation of the photons explain the effect of varying intensity of light in the Photoelectric effect?

The Photoelectric Effect - when a material emits electrons from its surface as it's exposed to incident light. It might be expected that an increase in light intensity would increase the ...

Answered by James B. • Physics tutor

1504 Views