Answer:
They´re the same.
Explanation:
Someone deleted my answer. And my brainly is gone..
Have a good night ma´am/sir.
Be safe!
Answer:
F = m X a
Therefore ,
Force required = 50 X 30 = 1500 newton
Answer:
The heat flux between the surface of the pond and the surrounding air is<em> 60 W/</em>
<em> </em>
Explanation:
Heat flux is the rate at which heat energy moves across a surface, it is the heat transferred per unit area of the surface. This can be calculated using the expression in equation 1;
q = Q/A ...............................1
since we are working with the convectional heat transfer coefficient equation 1 become;
q = h (
) ........................2
where q is the heat flux;
Q is the heat energy that will be transferred;
h is the convectional heat coefficient = 20 W/.K;
is the surface temperature = 
C 23°C + 273.15 = 296.15 K;
is the surrounding temperature = 
C = 20°C + 273.15 = 293.15 K;
The values are substituted into equation 2;
q = 20 W/.K ( 296.15 K - 293.15 K)
q = 20 W/.K ( 3 K)
q = 60 W/
Therefore the heat flux between the surface of the pond and the surrounding air is 60 W/
Answer:
A.a space station orbiting Earth
Explanation:
As we know that kinetic energy given as
K.E.=1/2 m v²
Where m= mass
v= velocity
If the velocity of the object is zero then it posses zero kinetic energy.
We also know that when object at a height from the ground or from a reference line then it posses potential energy and it does not have kinetic energy because object is in rest position.
In the option B and C system is in rest position that is why these type of system posses zero kinetic energy.
So the answer is A.
A.a space station orbiting Earth
I is just the uncertainty over the actual number multiplied by 100.
example:
36.1( +/- 0.1)
The percentage of the uncertainty here is 0.1/36.1x 100=0.3%
