Answer:
the tension in each side of the cable is 3677.57 N
Explanation:
given data
traffic light = 20 kg
cable between two poles = 30 m
sag in the cable = 0.40 m
solution
by the free body diagram
tan θ =
.............1
θ = 1.527 °
and
tension = mg
The net force is along x - axis is express as
T2 cosθ = T1 cosθ .................2
so T2 - T1 ..............3
and
when we take it along y axis that is express as
( T1 + T2) sinθ = mg ...................4
so by equation 3 we put here
2 × T1 sin(1.527) = 20 × 9.8
T1 = 3677.57 N
Answer:
373 K
Explanation:
To convert from °C to kelvin, you add the value to 273
Therefore,
100°C = (100+273)K
= 373K
Answer:
The moment of inertia of large ring is 2MR².
(A) is correct option.
Explanation:
Given that,
Mass of ring = M
Radius of ring = R
Moment of inertia of a thin ring = MR²
Moment of inertia :
Moment of inertia is the product of the mass of the ring and square of radius of the ring.
We need to calculate the moment of inertia of large ring
Using formula of moment of inertia

Where,
= moment of inertia at center of mass
M = mass of ring
R = radius of ring
Put the value into the formula


Hence, The moment of inertia of large ring is 2MR².
Therefore the world's record high temperature of 134.0°F (56.7°C) is held by Furnace Creek Ranch in Death Valley, California. That global high temperature was attained on July 10, 1913.
Answer:
D. The star is approaching Earth.
Explanation:
As we know by the doppler's effect of light that

here we know that
= change in frequency
here we know that the wavelength of light coming from the star is decreased so the frequency will increase



now we have

here we know that

now we have

So here correct answer is
D. The star is approaching Earth.