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A mortar* crew is positioned near the top of a steep hill. Enemy forces are charging up the hill and it is necessary for the crew to spring into action. Angling the mortar at an angle of ? = 52.0o (as shown), the crew fires the shell at a muzzle velocity of 152 feet per second. How far down the hill does the shell strike if the hill subtends an angle ? = 33.0o from the horizontal? (Ignore air friction.)
How long will the mortar shell remain in the air?
How fast will the shell be traveling when it hits the ground?
If the maximum acceleration the vehicle’s brakes are capable of is −6 m/s2, illustrate what is the maximum reaction time of the motorist that will allow her or him to avoid hitting the deer?
A lamp is placed 10 cm in front of a concave spherical mirror that forms an image of the filament on a screen placed 3.0 m from the mirror. What is the radius of curvature of the mirror
an electron is shot directly toward the center of a large metal plate that has surface charge density -1.00 × 10-6 C/m2. how far from the plate must the launch point be
The potential at location A is 481 V. A positively charged particle is released there from rest and arrives at location B with a speed vB. The potential at location C is 878 V, and when released from rest from this spot, the particle arrives at B wit..
A cardboard tube of radius R and length L has a uniform charge density on its surface. Find the potential at a point on the axis of the tube at a distance d from the center.
Orb spiders make silk with a typical diameter of 0.15 .A typical large orb spider has a mass of 0.50 . If this spider suspends itself from a single 12-cm-long strand of silk, by how much will the silk stretch?
A skateboarder, starting from rest, rolls down a 12.5 m ramp. When she arrives at the bottom of the ramp her speed is 6.10 m/s. (a) Determine the magnitude of her acceleration, assumed to be constant. .m/s2 (b) If the ramp is inclined at 26.5° wit..
A beam of light is incident on a glass plate ( = 1.62) in air and the reflected ray is completely polarized. What is the angle of refraction for the beam
Two equal positive charges of magnitude q1 = q2 = 6 nC are on the y axis at y1 = +3 cm and y2 = -3 cm. (a) What is the magnitude and direction of the electric field on the x axis at x = 6 cm? b) What is the force exerted on a third charge q0 = 4 n..
A 76 kg student traveling in a car with a constant velocity has a kinetic energy of 1.1 multiply.gif 104 J. What is the speedometer reading of the car in km/h
A net is positioned a horizontal distance of 52.0 m from the cannon. Explain at what height above the cannon should the net be placed in order to catch the daredevil?
Two astronauts are, 3.18 m apart in their spaceship, speaking to each other. How far away from the Earth is the spaceship?
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