El calor es la transferencia de energía de un objeto más cálido a un objeto más fresco. El calor puede transferirse de tres maneras: por conducción, por convección y por radiación. La conducción es la transferencia de energía de una molécula a otra por contacto directo.

6 0

3 years ago

As you know a cube with each side 4 m in length has a volume of 64m3. Each side of the cube is now doubled in length. What is th

kkurt [141]

Answer:

The ratio of the new volume to the old volume is 8 to 1.

Explanation:

Let's first list what we know:

A cube has sides with lengths of 4 m
The volume of the cube is 64 $m^3$
The new cube has sides double the length of the old cube

Since the new cube has sides double the length of the sides of the old cube, and 4 doubled is 8, the length of the sides of the new cube is 8.

The equation for the volume of a cube is $V = s^3$ , where "V" is the volume and "s" is the lengths of the sides.

Now, let's solve for the volume of the new cube:

$V = s^3$

$V = 8^3$

$V = 512$

The volume of the new cube is 512 $m^3$ .

The ratio of the new volume to the old volume is 512 : 64.

Let's simplify the ratio:

512 : 64

8 : 1

The ratio of the new volume to the old volume is 8 to 1.

P.S. This question should be in the mathematics subject, not the physics subject. (I pretty much only do math problems, so yes, it does matter. I don't know about the others though.)

5 0

3 years ago

Is much work does a an elevator do to lift a 1500 kg elevator a height of 100 m?

Harrizon [31]

Work done is equal to the force times the distance over which that force acts (provided they are parallel vectors) In symbols we say:
$W= \int\limits^b_a { F^{.} } \, dr$
Since gravity acts downward and the elevator goes upward, the dot product is reduced to a simple multiplication problem. First we need the downward force of the elevator, which is the weight according to F=ma. F=1500kg*9.81m/s^2=14715N. Then W=14715N*100m=1471500J, or 1.4715MJ

3 0

4 years ago