Answer:
Bottom of the circle.
Explanation:
At the top of the circle the tension and the weight contribute on being the centripetal force, at the middle of the circle only the tension contributes on being the centripetal force (the weight being perpendicular to it), while <u>at the bottom</u> of the circle the tension contributes on being the centripetal force (as always) <em>but the weight against to it</em>, so here is where the tension must be greater to allow the same centripetal force as the other cases, thus here is where the string will break.
Answer:
- 16.72° C
Explanation:
L = 36 m
T1 = 18° C
Let it is 3 cm shorter at T2.
ΔL = 3 cm = 0.03 m
ΔT = T1 - T2
coefficient of linear expansion for Aluminium, ∝ = 24 x 10^-6 / °C
Use the formula for the thermal expansion
ΔT = 34.72
T1 - T2 = 34.72
T2 = T1 - 34.72 = 18 - 34.72 = - 16.72° C
A good way in which you could help yourself better memorize the symbols for each of the elements on the periodic table, is by making flashcards and studying them. So you’re going to want to take some flashcards, write the full name of the element on the back, and write the symbol on the front… Just study those cards over and over until you’re able to say all the symbols for all the elements… What I would do is maybe memorize five to ten symbols to begin with, until you feel comfortable with adding more… Hope this helps.
Answer:
82.4 cm
Explanation:
The object and screen are kept fixed ie the distance between them is fixed and by displacing lens between them images are formed on the screen . In the first case let u be the object distance and v be the image distance
then ,
u + v = 184 cm
In the second case of image formation , v becomes u and u becomes v only then image formation in the second case is possible.
The difference between two object distance ie( v - u ) is the distance by which lens is moved so
v - u = 82.4 cm