The light from Barnard's Star takes about 5.94 years to reach Earth. Which of these statements is correct about Barnard's star?

It takes 5.94 years to view its image with a telescope.
It is located at a distance of 5.94 light years from Earth.
It has to travel a distance of 5.94 kilometers to reach Earth.
It has to move at the rate of 5.94 kilometers per hour to reach Earth.

Which type of energy is transferred by convection currents?

Aforce of 8,480 n is applied to a cart to accelerate it at a rate of 26.5 m/s2. what is the mass of the cart? 865 kg 320 kg 12.1 kg 3.12 kg

Asatellite that goes around the earth once every 24 hours iscalled a geosynchronous satellite. if a geosynchronoussatellite is in an equatorial orbit, its position appearsstationary with respect to a ground station, and it is known as ageostationary satellite find the radius rof the orbit of a geosynchronous satellite that circles the earth.(note that ris measured from the center of the earth, not the surface.) you mayuse the following constants: the universal gravitational constant g is 6.67 \times 10^{-11}\; {\rm n \; m^2 / kg^2}. the mass of the earth is 5.98 \times 10^{24}\; {\rm kg}. the radius of the earth is 6.38 \times 10^{6}\; {\rm m}.