Physics, 23.01.2020 04:31 stotherow5
Ablock lies on a plane raised an angle theta from the horizontal. threeforces act upon the block: f_w_vec, the force of gravity; f_n_vec, the normal force; and f_f_vec, the force of friction. thecoefficient of friction is large enough to prevent the block fromsliding .part a)because the block is not moving, the sum ofthe y components of the forces acting on the block must bezero. find an expression for the sum of the y componentsof the forces acting on the block, using coordinate system b. express your answer in terms of someor all of the variables f_n, f_f, f_w, and theta.\sum f_y=part b)because the block is not moving, the sum ofthe x components of the forces acting on the block must bezero. find an expression for the sum of the x componentsof the forces acting on the block, using coordinate system b. express your answer in terms of someor all of the variables f_n, f_f, f_w, and theta.\sum f_{x}=0part c)to find the magnitude of the normal force, you must express f_n in terms of f_w since f_f is an unknown. using the equations youfound in the two previous parts, find an expression for f_n involving f_w and theta but not f_f. f_n =diagram: in the diagram, a block is placed on an inclined surface with its both x and y components
Answers: 3
Physics, 22.06.2019 09:30
In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final
Answers: 3
Physics, 22.06.2019 09:40
(a) assume the equation x = at^3 + bt describes the motion of a particular object, with x having the dimension of length and t having the dimension of time. determine the dimensions of the constants a and b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.) (b) determine the dimensions of the derivative dx/dt = 3at^2 + b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.)
Answers: 1
Physics, 22.06.2019 12:00
This is for my 8th grade science class, i really don’t understand. can someone me? , lol.
Answers: 1
Physics, 22.06.2019 13:10
The atoms in a nickel crystal vibrate as harmonic oscillators with an angular frequency of 2.3 × 1013 rad/s. the mass of a nickel atom is 9.75 × 10-26 kg. what is the difference in energy between adjacent vibrational energy levels of nickel? (h = 6.626 × 10-34 j • s, , 1 ev = 1.60 × 10-19 j)
Answers: 2
Ablock lies on a plane raised an angle theta from the horizontal. threeforces act upon the block: f...
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