chemistry
A set of bookshelves rests on a hard floor surface on four legs, each having a cross-sectional dimension of 3.9 6.5 cm in contact with the floor. The total mass of the shelves plus the books stacked on them is 260. kg. Calculate the pressure in pascals exerted by the shelf foo...
Chemistry
A photocell is a device used to measure the intensity of light. In a certain experiment, when light of wavelength 530 nm is directed on to the photocell, electrons are emitted at the rate of 5.1 10-13 Coulombs/sec. Assume that each photon that impinges on the photocell emits o...
Physics
i.imgur. com/cqwun. png i'm kind of stuck.. are the answers 6, -3, -3, and 0?
math
how do you find the % on a spinner?
math
What is the compatible estimation for 329 + 64
Physics
i.imgur. com/VWFwb. png
Physics
Bernie drove home from a vacation in 1.5 hours. He traveled a total distance of 60 miles. What was his average speed in miles per hour?
Physics
A "rocket car" is launched along a long straight track at = 0 . It moves with constant acceleration = 2.5 . At = 3.0 , a second car is launched with constant acceleration = 8.7. At what time does the second car catch up with the first one? How far have the cars trave...
Physics
A juggler throws a ball straight up into the air with a speed of 20. With what speed would she need to throw a second ball half a second later, starting from the same position as the first, in order to hit the first ball at the top of its trajectory?
Physics
When jumping, a flea reaches a takeoff speed of 1.5over a distance of 0.45. A.) What is the flea's acceleration during the jump phase. B.) How long does the acceleration phase last?
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