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A baseball is hit so that it travels straight upward after being struck by the bat. A fan observes that it takes 2.80 s for the ball to reach its maximum height.
(a) Find the ball's initial velocity.
m/s upward
(b) Find the height it reaches.
m
The maximum speed of a 3.5-kg mass attached to a spring is 0.67m/s , and the maximum force exerted on the mass is 11N. What is the frequency of this system
A 7650kg iceberg with density 931 kg/m3 is afloat in seawater with density 1030 kg/m3. find the buoyant force on the iceberg
A 53.6 kg crate is dragged across a floor by pulling on a rope attached to the crate and inclined 16.0° above the horizont, If the coefficient of static friction is 0.510, what minimum force magnitude is required from the rope to start the crate mo..
An ideal gas occupies a volume of 3.0 cm3 at 20°C and atmospheric pressure. Determine the number of molecules of gas in the container
A falling stone takes 0.33s to travel past a window 2.20 m tall on the right. From what height above the top of the window did stone fall.
A small object is placed to the left of a convex lens and on the optical axis. What is the position of the image formed by the lens
A photographer uses a lens with f = 50mm to form an image of a distant object on the CCD detector in a digital camera, What is the height of the image now
Two charged dust particles exert a force of 8.5 x10-2 N on each other. What will be the force if they are moved so they are only one-seventh as far apart.
A simple circuit consists of a battery connected to a lightbulb. A current of 0.243 A runs for 64.5 min, What is the voltage of the battery
A student makes a simple generator by using a single square loop 24 cm on each side. The loop is then rotated at a frequency of 60 Hz in a magnetic field of 0.044 T.
Two cars are travelling on a desert road. After 5s, they are side by side at the next telephone pole. The distance between the poles is 70m.
The archerfish hunts by dislodging an unsuspecting insect from its resting place with a stream of water expelled from the fish's mouth, What is the vertical component of the water's initial velocity
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