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Astronauts on the ISS orbit Earth 16 times a day at a height of 400km above the surface. Given that the radius of Earth is approximately 6400km, how fast are the astronauts travelling?

v = 2𝜋R/T where R is the orbital radius, T is the time period.R = radius_of_earth + height_of_orbit = 6800km + 400km = 6800km = 6.8×10 6 m.T = hours_in_day/number_of_orbits_in_day = 24/16 hours = 1.5 hours =...
PV
Answered by Paaryn V. • Physics tutor
3193 Views

What is the function of the cell membrane?

It controls what enters and leaves the cell.
YA
Answered by Yemi A. • Biology tutor
2954 Views

Explain trend in why the ionisation energies increase across the period

As we travel along the period the nuclear charge increases, this increases the grip the nuclei of the atom has on the electrons. As they are on the same period they experience almost the exactly the same ele...
PJ
Answered by Patrick J. • Chemistry tutor
2328 Views

How do I differentiate?

If we have the curve y=x 3 +3x 2 -7x+5, to differentiate it we firstly multiply x by its power, and then reduce the power by one.Therefore x 3 will differentiate to 3x 2 , 3x 2 will go to 6x and -7x will go ...
WH
Answered by William H. • Maths tutor
5134 Views

How do you solve the equation 3(6x + 2) = 10 + 4x?

Begin by expanding the brackets of the LHS:3(6x + 2) = 18x + 6 3 * 6x = 18 x and 3 *2 = 6The equation now reads:18x + 6 = 10 + 4xSubtract 4x from both sides14x + 6 = 10Subtract 6 from both sides14x = 4Divide...
JT
Answered by James T. • Maths tutor
3641 Views