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"Natural Hazards" Please respond to the following:
You are pushing a 150-kg wooden crate in a straight line a distance of 4.5 m across a wooden floor. The crate is speeding up at 0.22 m/s2. What is the work done by friction on the crate
The 75 kg man is falling at 15 m/s! In an attempt to stop his fall, the brake shoe is pressed against the spinning pulley with a force of 1000 N. how long does it take to stop the man's fall
A circular coil of 57 loops and diameter 30.0cm is lying flat on a tabletop, and carries a clockwise current of 1.90A . A magnetic field of 0.370T , What is the torque on the coil
A billiard ball traveling at 3.00 m/s collides perfectly elastically with an identical billiard ball initially at rest on the level table. The initially moving billiard ball deflects 30.0o from its original direction. What is the speed of the init..
What is the magnification of an astronomical telescope whose objective lens has a focal length of 71 cm and whose eyepiece has a focal length of 2.1 cm
A uniform electric field of magnitude 380 N/C pointing in the positive x-direction acts on an electron, What is the work done by the field on the electron
A slingshot consists of a light leather cup containing a stone. The cup is pulled back against two parallel rubber bands. It takes a force of 15 N to stretch either one of these bands 1.0 cm.
A 0.22kg arrow with a velocity of 15.00 m/s to the west strikes and pierces the center of a 3.00 kg target. What is the final velocity of combined mass? Answer in m/s.
Two conductors are joined by a long copper wire. Thus A) each conductor must be at the same potential. B) no free charge can be present on either conductor. C) each conductor carries the same free charge.
As a 2.0-kg block travels around a 0.50-m radius circle it has anangular speed of 12 rad/s. The circle is parallel to the xy plane and is centered on the z axis, adistance of 0.75m from the origin. The z component of the angular momentum around th..
A particle of charge 4.96 is placed at the origin of an xy-coordinate system, and a second particle of charge -1.99 is placed on the positive x-axis at = 3.97. Find the direction of the total force acting on the third charge
Light in air is incident perpendicularly on a sheet of crown glass having an index of refraction of 1.522. Determine both the reflectance and transmittance
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