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A student applies a 1.5 Newton horizontal force on a box of weight 20 Newton at rest on the floor. The coefficient of static pressure is 0.3.
(a) Find the magnitude of the normal force acting on box?
(b) Find the magnitude of the static friction?
What are the advantages and disadvantages of constructive and deconstructive Interferences? Give typical examples of polarizations. Discuss musical equipments in the context of wavelengths and frequency.
What is the result of mixing 80g of ice at -20 degrees Celsius, into a 200g of water at 20 degrees Celsius?
A .45kg rock is dropped 7.0 m into 4.0 kg of water. If all the rock's kinetic energy is converted to thermal energy in the water, what's the water's temperature increase
A door has mass M, width W, and height H. It is attached to a door frame by only two hinges: one at 5H/6 (the top hinge) and one at H/6 (the bottom hinge). Calculate the force that the door frame exerts on each hinge
from the following list of aqueous solutions and water select the one with the highest boiling point.a 0.75 m naclb 1.0
An object with mass m = 1.1 g and charge q is placed at point A, which is 0.05 m above an infinitely large, uniformly charged, nonconducting sheet (? = -5.4 10-5 C/m2), as shown in the figure. Gravity is acting downward (g = 9.81 m/s2). Determine the..
a pendulum of length l and mass m hangs from a bead of mass m that moves frictionlessly along the curve yx4 . use y the
At a playground you let your kid sister (30 kg) kneel on the surface (near the edge) of a 2.5 meter diameter merry-go-round. What is the constant angular acceleration
The acceleration of a particle along an x axisis a = 7.0t,with t in seconds and a inmeters per second squared. At t = 3.0 s, itsvelocity is +24 m/s. What is its velocity at t =8.0 s?
assume that at low temperatures only the lattice vibrations and the electrons treated as a fermi gas contribute to the
The owner of a van installs a rear-window lens that has a focal length of -0.295 m. When the owner looks out during the lens at a person standing directly behind the van, the person appears to be now 0.242 m from the back of the van, and appears to b..
A horizontal wire carries a current I 1=80 A. A secondwire is suspended parallel to it. If the second wire carries 20 Aand has a mass per unit length of 0.2 g/m,
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