Which sentence best describes the particles that make up a liquid?

Physics

1 answer:

Daniel [21]2 years ago

4 0

I had a teat and the answer was A

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A 3kg box has 45J of gravitational potential energy, how high is it off the ground?

frez [133]

Answer:

1.53m

Explanation:

Given parameters:

Mass of box = 3kg

Gravitational potential energy = 45J

Unknown

Height of the box = ?

Solution:

To solve this problem;

Gravitational potential energy = mgh

m is the mass

g is the acceleration due to gravity

h is the height

45 = 3 x 9.8 x h

h = 1.53m

7 0

3 years ago

Describe a situation that includes no less than four charges of any magnitude, but they combine so that another location, p, has

Degger [83]

Answer:

Four charges of equal magnitude sitting at the vertices of a square

Explanation:

We can arrive at such a situation by thinking of a simple example first, a configuration of two charges. The force acting on the middle point of a straight line joining the two points(charges) will be zero. That is, the net Electric field will be zero as they cancel out being equal in magnitude and opposite in direction.

Now, we can extend this idea to a square having charge q at each vertex. If we put 'p' at the geometric center, we can see that the Electric fields along the diagonals cancel out due to the charges at the diagonally opposite vertices(refer to the figure attached). Actually, the only requirement is that the diagonally opposite charges are equal.

We can further take this to 3 dimensions. Consider a cube having charges of equal magnitude at each vertex. In this case, the point 'p' will yet again be the geometric center as the Electric field due to the diagonally opposite charges will cancel out.