Answer:
C. 8I.
Explanation:
As moment of inertia for a bar is proportional to the product of its mass and the square of its length, doubling the mass will double the moment of inertia. Doubling the length will quadruple the moment of inertia. Doing both will make the moment of inertia 2(4) = 8 times larger
Answer:
displacement= 30 m towards south, distance= 210m
Explanation:
Distance (scalar quantity) how much ground an object has covered.
Displacement (vector quantity) refers to how far out of place an object is it is the object's overall change in position.
Basically meaning for displacement the directions will be very key
D for Displacement
D= D1+D2
D= 120 (S) + 90 m (N)
Must be in same direction
D= 120 (S) + (-90 m) (S)
D= 30 m (S)
and for distance you are simply just adding how much distance they have covered
so d= d1+d2
d= 90m + 120m
d= 210m
Answer:
T=75N
Explanation:
In order to solve this problem, we must first start by drawing a free body diagram (see attached picture).
Once we got the free body diagram, we can do an addition of forces so we get:
it equals zero because it's at equilibrium.
So the sum of forces in this case will be:
so now we solve for the tension T:
we need to figure out what W is equal to. But in order to do that, we need to figure out what the volume of the glass is. We know the buoyant force is calculated by multiplying the volume displaces by the density of water and the acceleration of gravity, so we get:
So the volume of the glass will be:
we know the density of water is
so our volume is:
Now we can calculate the weght of the piece of glass, so we get:
W=125N
and now we can calculate the tension:
T=125N-50N
T=75N
The answer to your question is in fact <u>True</u>
Why?
Sound waves can only travel through things like water, walls, and solids. so sound cannot travel through space because there is no matter for the vibrations of the sound to work in.