Glass undergoes thermal expansion. The outer surface of the glass (with hot water) rapidly contracts when it is put inside the refrigerator. While the inner surface glass is still expanding because of the hot water. This causes the glass to crack.The reason would be C. the water has a larger coefficient of linear expansion than the glass. <span>Water expands significantly when it freezes.</span>
Answer:
B. 57.4 N horizontal (right)
<u>Explanation</u>:
using cos method:
<em>As its vertical, the direction of this force should be up.</em>
Answer:
Explanation:
Let
The cylinder imparts an upward velocity which is v m/s which slips on the rod OA.
The distance from the fixed hydraulic cylinder to the collar is given as s
From the figure given below, we can find the resulting angular velocity ω of the link OA in terms of velocity v, the displacement s of point B and the fixed distance d from the given mechanism.
We know that for angular velocity of link OA
where v is velocity
s is the displacement
d is the distance
Common health issues that can be positively affected, prevented or controlled by exercise.
Answer:
v=32.49 m/s
Explanation:
Given that
Distance ,d= 66 m
Initial speed of the car ,u = 0 m/s
Coefficient of friction ,μ = 0.8
Lets take the total mass of the car = m
The acceleration of the car is given as
a = μ g ( g= 10 m/s² )
Now by putting the values in the above equation we get
a= 0.8 x 10 m/s²
a= 8 m/s²
We know that ,final speed is given as
v²= u ²+ 2 a d
Now putting the value
v²=0² + 2 x 8 x 66
v²= 1056
v=32.49 m/s