Complete this sentence. The melting point of a sample will ____________ when the size of the sample increases. (3 points)
2 answers:
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Answer:
Explanation:
For free body diagram see attached sheet .
W is weight of steel girder acting at the middle point of its length . T is tension in the cable .
OB = √ ( 12² - 2² )
= 11.83 m .
OC = 11.83 / 2 = 5.915 m
Taking moment of tension T and weight W about point O
W x OC = T x OB
22 x 5.915 = T x 11.83
T = 22 x 5.915 / 11.83
= 11 kN
Considering forces acting in vertical direction and equating forces in opposite direction
T + R = W
R = W - T
= 22 - 11 = 11 KN
So force of grinder on the ground = R
= 11 KN.
Answer:
v = 3.6 m/s
Explanation:
given,
Inclination of the ramp, θ = 33⁰
Distance of the rope, d = 1.70 m
initial speed = ?
using conservation of energy
h = d sinθ
h = 1.7 x sin 33° = 0.926 m
moment of inertia of the solid ball
we know, v = r ω
v = 3.6 m/s
Hence, initial speed of the solid ball = 3.6 m/s
Answer:T he percentage error up to two decimal places is 2.22 %.
Explanation:
To calculate the percentage error, we use the equation:
We are given:
Experimental value of density=
Accepted value of density =
%
Hence, the percentage error is 2.22 %.