Top answers

Asteroid of mass 10^16 kg is travelling in the equatorial plane of Earth. It hits the surface at 45°. After the impact the day shortens by 1% (15 mins). How fast was the asteroid - comment? Neglect effects of atmosphere. Consider only inelastic collision.

Key idea - total angular momentum of the system is conserved. Before the collision: angular momentum of earth is given by L E =I w E , here w E is the angular velocity of Earth and I is its moment of innerti...
JK
Answered by Jiri K. • Physics tutor
2624 Views

How are the characters from at least two literary works representational of people from the time and place in which they were written?

(for the sake of this example, I will focus on one text - The Great Gatsby) Characters are moulded to embody the context of the novel in terms of ideals, standards and norms, creating vehicles for providing ...
CH
5549 Views

Calculate the number of moles of carbon dioxide molecules in 11 g of CO2.

Use equation: mole=mass/mr Calculate Mr of CO2 = 44Moles= 11g/44= 0.25 moles
MR
Answered by Mujahid R. • Chemistry tutor
6819 Views

The point P(-3,9) belongs to a line intercepting the origin. Find the equation of the line.

We are told that the line passes through the origin O (0,0) and the point P (-3,9). First we need to find the gradient of the line m; this is given by m = (change in y)/(change in x), hence m = (9-0)/(-3-0) ...
VB
Answered by Valeria B. • Maths tutor
3976 Views

Solve algebraically the simultaneous equations: x^2 + y^2 = 25 and y - 3x = 13

Firstly we should look at the question and notice that the two possible methods are substitution or elimination. We should then notice that since one equation is a quadratic and the other linear, then the el...
AS
Answered by Aviv S. • Maths tutor
4373 Views