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A block is on a plane inclined at 75 degrees with a coefficient of static friction of 0.1. The block is kept stationary on the ramp by someone pushing down on it in a direction perpendicular to the ramp's surface. If the block is 100g, what is the minimum necessary magnitude of the force to keep it stationary?
q1. a car at the indianapolis-500 accelerates uniformly from the pit area going from rest to 325 kmh in a semicircular
Light travels at a speed of 1.947 × 108 m/s in a certain substance. What is the index of refraction of this substance
display that Gauss' law is satisfied for the magnetic field due to a straight wire that carries a current I in the +z - direction for a volume that represents a portion of a cylindrical shell of height h, extending from a radius r to a radius R a..
q1. a stone thrown upward from the top of a 108 ft cliff at 132 ftsec eventually falls to the beach below. for this
You buy an ice cream cone. The cone you are given is filled with melted ice cream of density 1.2g/cm^3. Find the pressure at the bottom of the cone
The vertical displacement y(x,t) of a string stretched along the horizontal x-axis is given by y(x,t) = (6.00 mm) cos[(3.25 m-1)x - (7.22 rad/s)t]. What is the distance between adjacent crests of the wave
The adiabatic, aergonic throttling calorimeter is a device by which the quality of wet steam flowing in a pipe may be determined. Determine (a) the enthalpy of the steam in the pipe
Although physics problems often assume that inductors have zero resistance, actual inductors can, in fact, have appreciable resistance. What is the inductance of the inductor
A bomb is designed to explode 2.00 s after it is armed. The bomb is launched from earth and accelerated to an unknown final speed. What is the final speed of the bomb just before it explodes
When a spacecraft travels from Earth to the Moon, the gravitational force from Earth initially opposes this journey. How far from Earth must the spacecraft be for the gravitational forces from the Moon and Earth to just cancel
The objective lens in a microscope with a 21.0 cm long tube has a magnification of -50.0 and the eyepiece has a magnification of 15.0. What is the focal length of the objective
An engine transfers 2.5 X 103 J of energy from a hot reservoir during a cycle and has an efficiency of 0.3. How much heat is transferred as exhaust to a cold reservoir
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