Hy does the efficiency of simple machine increase when oil or grease is used
carpet is beaten with a stick to remove the dust particles. Why?
Thy is the unit of power called derived unit?
Group
Group 'D'
4*4=16
13. A boy of mass 40 kg runs upstairs and reaches the 8 m high first floor
seconds. Calculate.
a. The force of gravity acting on the boy.
b. The work done by him against gravity.
c. The power of the boy.
bability and sketch the solubility carve of sodium chlorid​
Answers: 3
Physics, 21.06.2019 16:20
Two identical small charged spheres are a certain distance apart, and each one initially experiences an electrostatic force of magnitude f due to the other. with time, charge gradually leaks off of both spheres. when each of the spheres has lost half its initial charge, the magnitude of the electrostatic force will be
Answers: 1
Physics, 21.06.2019 23:30
What are chlorofluorocarbons and what impact do they have on the atmosphere?
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Physics, 22.06.2019 06:30
=force × distance a. work b. velocity c. pressure d. momentum
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Physics, 22.06.2019 12:00
Asolid round steel rod 6.25 mm in diameter and 375 mm long is rigidly bonded to the end of solid square brass rod 25 mm on a side and 300 mm long. the geometric axes of the bare are along the same line. an axial tensile force of 5.4 kn is applied at the extreme ends of the assembly. for steel e = 200 gpa and for brass e = 90 gpa. determine the total elongation for the assembly.
Answers: 1
Hy does the efficiency of simple machine increase when oil or grease is used
carpet is beaten with...
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