Physics, 14.09.2019 22:10 Tyrant4life
Bob has just finished climbing a sheer cliff above a beach and wants to figure out how high he climbed. all he has to use,
however, is a baseball, a stopwatch, and a friend on the ground with a long measuring tape. bob is a pitcher, and knows that
the fastest he can throw the ball is vo = 91.0 mph. bob starts the stopwatch as he throws the ball (with no way to measure
the ball's initial trajectory) and watches carefully. the ball rises and then falls, and after t; = 0.510 s, the ball is once again
level with bob. bob cannot see well enough to time when the ball hits the ground. bob's friend then measures that the ball
landed a distance of x = 387 ft from the base of the cliff. how high up is bob if the ball started from exactly 5 ft above the
edge of the clift?
Answers: 3
Physics, 21.06.2019 22:50
Acar of mass m goes around a banked curve of radius r with speed v. if the road is frictionless due to ice, the car can still negotiate the curve if the horizontal component of the normal force on the car from the road is equal in magnitude to 101) a) mv2/r b) mg/2. d) mg e) tan[v2/(eg)]
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Physics, 21.06.2019 23:30
Two technicians are discussing a resistance measurement between the can-h and can-l wires. technician a says this measurement should be done with the ignition switch in the "run" position. technician b states that a measurement of 0 ohms indicates an open in the network. which technician is correct?
Answers: 3
Physics, 22.06.2019 02:30
Which is an example of gaining a static charge by conduction? a) rubbing a balloon against your hair. b) shuffling your shoes across a carpet. c) bringing a charged rod near an electroscope. d) touching your car on a cold day and getting a shock.
Answers: 1
Physics, 22.06.2019 09:30
This is important. 1. which of the following is an si base unit for measuring length? (2 points) inch gram meter mole 2. which of the following units for distance is an si unit? (2 points) centimeter foot inch yard 3. which of the following tools should a scientist use to measure an object in meters? (2 points) electronic balance pan balance tape measure thermometer
Answers: 2
Bob has just finished climbing a sheer cliff above a beach and wants to figure out how high he climb...
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