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Question Part Points Submissions Used 1 2 3 4 5 -/0.2 -/0.2 -/0.2 -/0.2 -/0.2 0/5 0/5 0/5 0/5 0/5 Total -/1 The intensity of sunlight striking Earth's upper atmosphere (called the solar constant) is 1.35 kW/m2.
(a) Find Erms and Brms due to the sun at the upper atmosphere of Earth. Erms = V/m Brms = µT
(b) Find the average power output of the sun. W
(c) Find the intensity at the surface of the sun. W/m2
(d) Find the radiation pressure at the surface of the sun. Pa
A subway train has three cars, each weighing 1.20 x 10^5 N. The frictional force on each car is 103 N, and the first car, acting as an engine, exerts a horizontal force of 4.80 x 10^4 N on the rails.
Describe the full annealing heat treatment for a plain carbon steel.
A car of mass 920.0 kg accelerates away from an intersection on a horizontal road. When the car speed is 41.0 km/hr (11.4 m/s), the net power which the engine supplies is 4300.0 W (in addition to the extra power required to make up for air resista..
The average speed of the atoms in a 1.6 g sample of helium gas is 651 m/s. Estimate the thermal energy of the sample
Find the distance between the centers of the spheres.
A rubber ball is bouncing along the lever floor. after each bounce it only goes back up to half of the height that it just fell from. make a proportional sketch displaying this ball bouncing six times.
Observations of a certain galaxy show that stars at a distance of 16 pc from the center of the galaxy orbit a central supermassive black hole at a speed of 200 km/s
A banked circular highway curve is designed for traffic moving at 77-km/h. The radius of the curve is 153 m. Traffic is moving along the highway at 46-km/h on a rainy day. What is the minimum coefficient of friction between tires and road that wil..
When some stars use up their fuel, they undergo a catastrophic explosion called a supernova. This explosion blows much or all of a star's mass outward, in the form of a rapidly expanding spherical shell.
A tourist being chased by an angry bear is running in a straight line toward his car at a speed of 3.7 m/s. The car is a distance d away. The bear is 30 m behind the tourist and running at 6.0 m/s. The tourist reaches the car safely. What is the m..
Three sheets of plastic have unknown indices of refraction. Sheet 1 is placed on top of sheet 2, and a laser beam is directed onto the sheets from above, what is the expected angle of refraction in sheet 3
suppose an electric motor continuously operating with average power 4.65 kW runs the pump. Find its efficiency.
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