Answer:
Explanation:
Given that:
Absolute temperature of the body,
- emissivity of the body,
<u>Using Stefan Boltzmann Law of thermal radiation:</u>
where:
(Stefan Boltzmann constant)
Now putting the respective values:
Which statements describe the characteristics of asteroids? Check all that apply. formed 4.6 billion years ago orbit the Sun bey
2 answers:
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Answer:
a)106.48 x 10⁵ kg.m²
b)144.97 x 10⁵ kgm² s⁻¹
Explanation:
a)Given
m = 5500 kg
l = 44 m
Moment of inertia of one blade
= 1/3 x m l²
where m is mass of the blade
l is length of each blade.
Putting all the required values, moment of inertia of one blade will be
= 1/3 x 5500 x 44²
= 35.49 x 10⁵ kg.m²
Moment of inertia of 3 blades
= 3 x 35.49 x 10⁵ kg.m²
= 106.48 x 10⁵ kg.m²
b) Angular momentum 'L' is given by
L = x ω
where,
= moment of inertia of turbine i.e 106.48 x 10⁵ kg.m²
ω=angular velocity =2π f
f is frequency of rotation of blade i.e 13 rpm
f = 13 rpm=>= 13 / 60 revolution per second
ω = 2π f => 2π x 13 / 60 rad / s
L= x ω =>106.48 x 10⁵ x 2π x 13 / 60
= 144.97 x 10⁵ kgm² s⁻¹
Answer:
Explanation:
Given
Radius of cylinder r=0.1 m
Length L=0.2 in.
Moment of inertia I=0.020 kg-m^2
Force F=1 N
We Know Torque is given by
where
Answer:
The number of electrons is
(D) is correct option.
Explanation:
Given that,
Battery capacity = 750 mA-h
Time t= 8 hours
Time t'=3 hours
We need to calculate the battery capacity
We need to calculate the number of electrons in 1 C Li
Using formula for number of electron
We need to calculate the number of electron in 2700 C
The total number of electrons battery can deliver in 8 hours
We need to calculate the number of electron in 3 hours
Using formula of number of electrons
Put the value into the formula
Hence, The number of electrons is