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3 years ago

You are going to invent a new device that people can use instead of a microwave to warm up leftovers.

Physics

1 answer:

agasfer [191]3 years ago

8 0

OK. I would build it the same shape and size as a microwave oven, but I would leave out all the normal electronics.

In the side compartment, in place of the electronics, at the top, I would put a little gas flame, like a Bunsen burner. In the bottom of the side compartment, I would put a treadmill with two strong hamsters. Then, I would install ductwork in the compartment so that when the hamsters turn the wheel, some fan-blades along the rim of the wheel would blow the hot air from the gas flame down and into the big food compartment. This would warm the left-overs WITHOUT using electricity from the wall outlet, and without spraying any hazardous high-power RF energy into the kitchen.

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_____ lenses always produce smaller images

tatyana61 [14]

Answer:

Explanation:

The Answer is Concave. Concave images make images smaller, they refract the light rays in many directions, causing the original image to shrink. This is why shortsighted people wear concave lenses. Convex lenses, the other type of diverging lenses, cause the image to be larger, because it concentrates the image in a specific point. That is how a magnifying glass works.

4 0

3 years ago

What happens to gravity when someone jumps up?

allsm [11]

when you jump up in Gravity it pulls you down the less gravity the more you can jump easier

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3 years ago

The trunk of a elephant may extend up to 2.2 m. It acts much like an organ pipe only open at one end when the elephant blows air

Talja [164]

Answer:

1) f = 38.63 Hz , 2) f = 115.9 Hz

Explanation:

The elephant's trunk can be approximated by a tube with a closed end, in pipes the closed ends correspond to nodes and the open ends to antinodes or bellies.

The expression for the wavelengths of this system is

4L = n λ

n = 1, 3, 5, 7 ...

also let's use the relationship between frequency and wavelength and wave speed

v = λ f

f = v / λ

f = v n / 4L

f = v / 4L n

1) the fundamental frequency occurs for n = 1

f = 340/4 2.2 1

f = 38.63 Hz

2) The first harmonic

n = 3

f = 340/4 2.2 3

f = 115.9 Hz

5 0

3 years ago

The moon's gravitational pull causes _____.

Hunter-Best [27]

<span>The moon's gravitational pull causes: currents tides.</span>

8 0

3 years ago

Read 2 more answers

3. A 40-gram ball of clay is dropped from a height, h, above a cup which is attached to a spring of spring force constant, k, of

zheka24 [161]

Answer:

the maximum speed of the ball is 12.65 m/s

Explanation:

Given;

mass of the ball, m = 40 g = 0.04 kg

spring constant, k = 25 N/m

Apply the principle of conservation of energy;

The Elastic potential energy of the spring will be converted into Kinetic of the ball;

$\frac{1}{2} kx^2 = \frac{1}{2} mv^2\\\\ kx^2 = mv^2\\\\v^2 = \frac{kx^2}{m} \\\\v = \sqrt{\frac{kx^2}{m}} \\\\v = \sqrt{\frac{(25)(0.506)^2}{0.04}} \\\\v = \sqrt{160.0225} \\\\v = 12.65 \ m/s$

Therefore, the maximum speed of the ball is 12.65 m/s

4 0

3 years ago