The hubble telescope’s orbit is 5.6 × 10^5 metersabove earth’s surface. the telescope has a massof 1.1 × 10^4 kilograms. earth exerts a gravitationalforce of 9.1 × 10^4 newtons on the telescope. themagnitude of earth’s gravitational field strengthat this location is(1) 1.5 × 10^−20 n/kg (3) 8.3 n/kg(2) 0.12 n/kg (4) 9.8 n/kg

World class speed skaters can skate a 3,000-m course in about 4 minutes.what is their average speed for this course? a. 12.5 m/sb. 1.33 m/sc. 1.25 m/sd. 13.3 m/s

The electric potential v is constant everywhere within a certain region of space. which statement below is true? the choices are: the electric field is also constant (but not zero) within the region. a charged particle placed within the region will experience an electric force. the electric field is zero everywhere within the region. the electric field varies from place to place within the region.

Ascientist notices that an oil slick floating on water when viewed from above has many different colors reflecting off the surface, making it look rainbow-like (an effect known as iridescence). she aims a spectrometer at a particular spot and measures the wavelength to be 750 nm (in air). the index of refraction of water is 1.3