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Water from a fire hose is directed horizontally against a wall at a rate of 1.15 kg/s and a speed of 11.7 m/s. Calculate the magnitude of the force exerted on the wall, assuming the water's horizontal momentum is reduced to zero when it strikes the wall.
a 741 kg stopped at a intersection is rear ended by a 1580kg truck moving at 17.5 m/s. Find final speeds of both vehicles
A converging lens (f = 24.6 cm) is used to project an image of an object onto a screen. Find the two object distances
An unstable nucleus of mass 2.9 10-26 kg, initially at rest at the origin of a coordinate system, Find the magnitude and direction of the velocity of the third particle
There is a beam that weighs 1500 kilograms and is twenty meters in length. It has a 15000 kilogram mass on the right side, five meters from the center of gravity. obtain the net tension of each brace that is holding up the beam on both sides.
A person 25 centimeters in front of a concave makeup mirror sees an upright image magnified by a factor of two. Draw a sketch to locate the image of the person
A parallel plate capacitor has an electric field between its two plates of 525,000 V/m. The two plates are 2.2x10-5 m apart. find the speed of the proton when it reaches the negative plate
Tension is maintained in a string The observed wave speed is 26.5 m/s when the suspended mass is m = 2.87 kg. What is the mass per unit length of the string
What is the force of gravity? Where is it strongest? Is there any gravity on the moon? What is the gravitational force on the moon dependent on
a hollow spherical shell with mass 1.55 kg rolls without slipping down a slope angled at 39.0.part a find the
A car's outside rear-view mirror is convex, with focal length -1.5m . In the mirror you see a truck that's actually 4.0m tall and 10.3m behind you. What is its apparent height
Two kids hang by their hands from the same tree branch. The branch is straight, and grows out from the tree trunk at an angle of 28.7° above the horizontal. Find the magnitude of the net torque exerted on the branch by the kids
q1. when a 0.5 kg mass is suspended from a spring the spring stretches 4 cm. the mass is then displaced 2 cm from its
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