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Q1. A projectile is fired horizontally from a gun that is 48.0 m above flat ground; emerging from the gun with a speed of 250 m/s. (a) how long does the projectile remain in the air? (b) At what horizontal distance from the firing point does it strike the ground? (c) What is the magnitude of the vertical component of its velocity as it strikes the ground?
Q2. Drawing on Erastothenes' method, if two observers are due north and south of each other and are separated by 490 km, what is the circumference of their spherical world if they see the same star on their meridian at altitudes of 29 degrees and 45 degrees in that order, and at the correct same time?
question1how much 235u is consumed per year in gy to produce sufficient electricity to continuously run a 100-w light
A certain capacitor in a circuit has a capacitive reactance of 30.89 ohms when the frequency is 177 Hz. What capacitive reactance does the capacitor have
A car drives straight off the edge of a cliff that is 47.00m high. The police at the scene of the accident observed that the point of impact is 122 m from the base of the cliff. How fast was the car travelling when it went over the cliff.
A sanding disk with rotational inertia 2.4 10-3 kg•m2 is attached to an electric drill whose motor delivers a torque of 8 N•m about the central axis of the disk. What are the following values about the central axis at the instant the torque has been ..
A thin square metal plate is 1.00 m on a side is located in the xz-plane. A charge of 400 nC is placed on the plate and can be taken to be distributed uniformly.
A certain elevator cab has a total run of 190 m and a maximum speed of 305 m/min, and it accelerates from rest and then back to rest at 1.22 m/s2. How long does it take to make the nonstop 190 m run, starting and ending at rest
A loop of diameter 21 cm is placed in a uniform electric field of magnitude 7.4 102 N/C. What is the electric flux through the loop when the electric field is perpendicular to the plane of the loop
A beanbag is thrown horizontally from a dorm room window a height h above the ground. find the direction of the beanbag's velocity
A 1.5-V dry cell can be tested by connecting it to a low-resistance ammeter. It should be able to supply at least 22 A. What is the internal resistance of the cell
q1. a spring with spring constant 14 hangs from the ceiling. a ball is attached to the spring and allowed to come to
question1later than the sun exhausts its nuclear fuel its ultimate fate will be to collapse to a white dwarf state. in
Examine whether it is reasonable to ignore the effects of gravity for each particle. Evaluate the paths travelled by electron and proton and explain the differences.
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