Physics, 19.09.2019 22:00 nathangirnet
bret and cindy took different routes to travel from point a to point e. bret took the route along a, b, c, d, and e. cindy took the route along a, f, and e and reached the destination in 2 hours. their routes are shown.
if bret's average speed was twice cindy's average speed, what was bret's average speed?
3 miles per hour
6 miles per hour
8 miles per hour
9 miles per hour
Answers: 2
Physics, 22.06.2019 14:00
Awater balloon launcher uses an elastic band with a spring constant of 115 n/m to use thee launcher you stretch thee band back with a balloon n it the water balloons have a mass of 1.3 kg a) if you stretch the band by 0.8 m, what elastic force will the band exert? b) with the band stretched 0.8 m, how much elastic potential energy is stored in the spring? c) if you release the band, it pushes forward. what is the kinetic energy of the balloon when it reaches the natural length of the band? d) what is the speed of the balloon when it reaches the natural length of the band?
Answers: 1
Physics, 22.06.2019 20:00
In an old-fashioned amusement park ride, passengers stand inside a 3.0-m-tall, 5.0-m-diameter hollow steel cylinder with their backs against the wall. the cylinder begins to rotate about a vertical axis. then the floor on which the passengers are standing suddenly drops away! if all goes well, the passengers will “stick” to the wall and not slide. clothing has a static coefficient of friction against steel in the range 0.60 to 1.0 and a kinetic coefficient in the range 0.40 to 0.70. part a what is the minimum rotational frequency, in rpm, for which the ride is safe? express your answer using two significant figures. f f = rpm
Answers: 1
Physics, 23.06.2019 02:00
2) why do satelites not fall while revolving around the earth?
Answers: 1
bret and cindy took different routes to travel from point a to point e. bret took the route along a,...
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