Answer:
b. 4.6 %
Explanation:
From the question,
E = M.A/V.R................ Equation 1
Where E = percentage Efficiency of the machine, M.A = machanical accurancy of the machine, V.R = Velocity ratio of the machine
Make V.R the subject of the equation
V.R = M.A/E
Given: M.A = 3, E = 65% = 0.65
Substitute this values into equation 2
V.R = 3/0.65
V.R = 4.6
Hence the right option is b. 4.6 $
Answer:
a) Dalton
Explanation:
In <u>Dalton's</u> model atoms are imagined as tiny balls. This model was introduced in the year 1803 by John Dalton.
The strength of the force of friction depends on two factors; the type of surfaces involves and the force that the surfaces are being push together