Elastic limit, maximum stress or force per unit area within a solid material that can arise before the onset of permanent deformation. When stresses up to the elastic limit are removed, the material resumes its original size and shape. Stresses beyond the elastic limit cause a material to yield or flow.
Answer:
Explanation:
a)
To pass the Coulomb barriers and undergo nuclear fusion, alpha particles must be burned at high temperatures. As a result, the ignition temperature needed for this reaction is 5.4168 × 10¹⁰ K. Helium must be burned at a high temperature and density. As a result, this must occur for hot stars with high densities.
b)
The amount of energy given up can be calculated as follows:
where;
Therefore, from the reaction (1);
From the second reaction:
(a) we can solve the problem by using the mirror equation:
where
f is the focal length of the mirror
is the distance of the object from the mirror
is the distance of the image from the mirror.
For the sign convention, f is taken as negative for a convex mirror and
is taken as negative if the image is located behind the mirror, as in this problem. So we have
and re-arranging the mirror equation we can find the distance of the object from the mirror:
from which we find
(b) The magnitude is defined as the ratio between the size of the image and the size of the object, which is also equal to the negative of the ratio between the distance of the image and the distance of the object from the mirror:
Using what we found at point (a), the magnification in this problem is
where the positive sign means the image is upright.
Answer:
Explanation:
As we know that the speed of sound in air is given as
now the rate of strike is 1 stroke per second
so distance is given as
now we will have
so the distance is given as
Answer:
h = 44.5 m
Explanation:
Given that,
Power of the engine, P = 5 hP = 3728.5 W
Weight of the load, W = 2000 lb = 8900 kg
We need to find how high the load be raised in 10 s.
We know that,
Power,
Where
W is work done
Also,
1 Pound = 4.45 newtons earth (N)
So, the height raised by the load is 44.5 m.