A large telescope of mass 8410 kg is in a circular orbit around the earth, making one revolution every 927 minutes
What is the magnitude of the gravitational force exerted on the satellite by the earth? (G = 6.67 × 10-11 N ? m2/kg2, Mearth = 6.0 × 1024 kg)
3.4 × 103 N
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A loop of area 0.384 m2 is in a uniform 0.0565-T magnetic field. If the flux through the loop is 6.10 × 10^–3 T·m2, what angle does the normal to the plane of the loop make with the direction of the magnetic field?
a. 73.7° b. 89.3° c. 16.3° d. 76.0º e. This is not possible.
The spectral sequence sorts stars according to
A) mass. B) surface temperature. C) luminosity. D) core temperature. E) radius.
Starting from rest, a 20,000-kg aircraft being launched from an aircraft carrier goes from 0 to 90 m/s in 2 seconds. The net force acting on the aircraft is
a. 3,600,000 N. b. 1,800,000 N. c. 900,000 N. d. 450,000 N. e. 275,000 N.
A car travels for 140 km at 70.0 km/hr. It then travels an additional distance of 60.0 km 40.0 km/hr. The average speed is
A. 61.0 km/hr. B. 57.1 km/hr. C. 53.3 km/hr. D. 46.7 km/hr. E. 45.0 km/hr.