Suppose mass and radius of the planet are half and twice that of earth respectively. if acceleration due to gravity of the earth is 10m/s2. find acceleration due to gravity of that planet?

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?

Write a full page that sumerizes thermodynamics it’s from the website visionlearnig

Why should the wavelength scale of spectroscope be calibrated