Answer:
775.48 W
Explanation:
given,
diameter of disk = 0.6 cm
length of the disk = 0.4 m
T₁ = 450 K T₂ = 450 K T₃ = 300 K
= 1.33
now,
the value of view factor (F₁₂)corresponding to 1.33
F₁₂ = 0.265
F₁₃ = 1 - 0.265 = 0.735
now,
net rate of radiation heat transfer from the disk to the environment:
= 2 F₁₃ A₁ σ (T₁⁴ - T₃⁴)
= 2 x 0.735 x π x (0.3)² x (5.67 x 10⁻⁸ W/m²) (450⁴ - 300⁴)
= 775.48 W
Net radiation heat transfer from the disks to the environment = 775.48 W
Answer:
Short circuit, closed circuit, open circuit
In telecommunication systems, Carrier frequency is a technical term used to indicate: ... The frequency of the unmodulated electromagnetic wave at the output of a conventional amplitude-modulated (AM-unsupressed carrier), or frequency-modulated (FM), or phase-modulated (PM) radio transmitter.
Answer:
The impulse of the net force on the ball during its collision with the wall is 25N
Explanation:
Step one :
Given data
Mass =5kg
Velocity v1=10m/s
Velocity v2=5m/s
The equation for impulse is given as
P=m(v1-v2)
Where P =impulse
Substituting our values into the equation we have
P=5*(10-5)
P=5*5
P=25N
The impulse 25N
What is impulse?
Impulse is the change of momentum of an object when the object is acted upon by a force for an interval of time.
Answer:
Acceleration of the car, 
Explanation:
It is given that,
Mass of the car, m = 1230 kg
The car is inclined at an angle of 39 degrees.
The acceleration of gravity acting on the car is 
. The component of car parallel to inclined planes is :
Net force acting on it is :
So, the acceleration of the car is 
. Hence, this is the required solution.
