A roller coaster has a vertical loop with radius 29.5 m. What is the minimum speed of the roller coaster car can have at the top of the loop if the passengers do not lose contact with the seats?
A. 10.0 m/s
B. 14.0 m/s
C. 17.0 m/s
D. 19.0 m/s
C. 17.0 m/s
Physics & Space Science
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A 35-mm digital camera using a standard 50.0 mm lens is focused on a 1.80 m tall person who is standing 3.25 m from the lens. You now refocus the camera on a 15.0 cm tall flower that is 75.0 cm from the lens
(a) In refocusing, by how much did you move the lens? Did you move it toward the film or away from it? (b) What is the height of the flower's image on the CCD sensor?
Physics & Space Science
For the gray opaque surface having the spectral emissivity given in the figure, determine the spectral reflectivity.
Physics & Space Science
If the acceleration of an object is negative, the object must be slowing down
A) True B) False
Physics & Space Science
Briefly describe the Sun's 22 year activity cycle
What will be an ideal response?
Physics & Space Science