Explanation:
Young' modulus is the ratio of normal stress to the longitudinal strain. Mathematically, it is given by :
Normal stress is given by force per unit area. Longitudinal strain is the change in length per unit original length.
The mathematical definition of Young's modulus is given by :
..........(1)
Where
is the change in length
F is the force
A is the area of cross section
So, the Young's modulus refers to the change in length of the object. Hence, the correct option is (b) "length".
Answer:
23895.05 Pa
Explanation:
V = 0.03 m³
mass, m = 4 g
Temperature, T = 388 K
Let P be the pressure.
number of moles, n = 4 / 18 = 0.22
Use ideal gas equation
PV = n RT
P x 0.03 = 0.22 x 8.314 x 388
P = 23895.05 Pa
Thus, the pressure is 23895.05 Pa.
Answer:
Explanation:
Given that
Wavelength
slit separation
slit screen distance
We know that for double slit the maxima condition is that
For small angle approximation,
Now
Again
Hence
Answer:
a) positive bc the surroundings are losing heat
b) positive
c) negative bc the surroundings are gaining heat
d) negative bc work is done by the system
Explanation:
Answer:
x = 50 N
Explanation:
Given that we have a net force, a mass, and acceleration, we can use the fundamental formula for force found in newton's second law which is F = m × a.
Given a mass of 150 kg, and an acceleration 3.0m/s². We can substitute these two values in our formula to calculate the magnitude of these forces or it's net force to identify the unknown force acting on our known force for this situation to work.
_______
F (Net force) = F2 (Second force which we are given) - F1 (First force) = m × a
m (mass which we are given) = 150 kg
a (acceleration which we are given) = 3.0m/s
________
So F = m × a → F2 - F1 = m × a →
500 - F1 = 150 × 3.0 → 500 - F1 = 450 →
-F1 = -50 → F1 = 50