Astronomy | Astrophysics Answers

Calculate the force of gravity between a newborn baby of mass 4 kg and the obstetrician of mass 70 kg, who is 0.2 m from the baby.

due to the sun-earth distance, the average temperature of the earth is maintained at 255K. Derive this temerature of earth and state any assumptions made and state the variables used?

due to the sun-earth distance the average temperature of earth is maintained at 255k. Derive this temperature of earth and state any assumptions made and state the variables used.

Transition A produces light with a wavelength of 470 nm. Transition B involves twice as much energy as A. What wavelength light does it produce?

Scientists want to place a 4100.0 kg satellite in orbit around Mars. They plan to have the satellite orbit a distance equal to 1.5 times the radius of Mars above the surface of the planet. Here is some information that will help solve this problem:
mmars = 6.4191 x 1023 kg
rmars = 3.397 x 106 m
G = 6.67428 x 10-11 N-m2/kg2

What speed should the satellite have to be in a perfectly circular orbit?

Planet x is 265 earth orbital radii from the sun, what is the period of revolution in earth year?

1) a seconds pendulum is taken to the moon where the value of g is a sixth of the value on earth. the time period of the pendulum will be------

a) 1sec b) 2 sec c) 5sec d) none of these

2)if a force of 1 newton acts on a mass of 500 gms, acceleration will be?

If an object is traveling at 37 m/s, how far will it travel in 10500 sec? Answer in km.

Eleven neutrinos were detected by the Kamioka water Cerenkov detector in Japan, following the explosion of supernova SN1987a. The Kamioka detector had a fiducial mass of 1000 metric tonnes. How many human beings, therefore, actually 'saw' the explosion of SN1987a

Hint - concider the structure of the human eye.

At what distance from the earth is the gravitational pull of the sun equal to the gravitational pull of the earth?