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How would you calculate the vertical and horizontal components of the velocity of an object with an initial velocity of 15m/s which is travelling upwards at an angle of 30 degrees to the horizontal?

With these sort of questions involving components, I would always advise drawing a diagram of the problem so that you're clear of the situation!In this case we have an object that is travelling at a speed...

Answered by Joseph P. Physics tutor
4946 Views

Using Newton's law of universal gravitation, show that T^2 is proportional to r^3 (where T is the orbital period of a planet around a star, and r is the distance between them).

Newton's law of gravitation is: FG=(GMm)/(r2).First of all, it's a good idea to draw a diagram of the planet and star, labelling the directions of the centripetal force and and the p...

Answered by Jake B. Physics tutor
2969 Views

Why is the redshift important?

The redshift is an important piece of evidence for the big bang theory. If we look at the visible region on the electromagnetic wave spectrum, we will see there is red light on the left and there is viole...

Answered by Laxshana C. Physics tutor
3777 Views

Using Newton's law of gravitation, derive a suitable formula for the escape velocity of an object at Earth's surface.

Newton's law of gravitation is;
F = GMm/(r2)
Where G is the Universal Gravitational constant, M is the mass of Earth, m is the mass of the object and r is the radius of Earth (no valu...

Answered by Charlie M. Physics tutor
4360 Views

Why is the nuclear model better than the plum pudding model of the atom?

The plum pudding model was the idea of a positively charged sphere, with negative electrons dotted within it as the model of an atom. easiest understood drawn outA scientist named Rutherford did ...

Answered by Georgina H. Physics tutor
19650 Views

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