PHYSICS HIGH SCHOOL

In a practical machine, the power output is _______ the power input. A. larger than
B. multiplied by
C. equal to
D. smaller than

Answers

Answer 1
Answer: The correct answer for the question that is being presented above is this one: "D. smaller than." In a practical machine, the power output is smaller than the power input. The power output is smaller than the power input as most of the energy usually has been converted to heat in the process.
Answer 2
Answer:

Smaller than is the correct answer

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Our topic at school is light- What is dispersion, diffusion, refraction and reflection?

Answers

Dispersion-Distributing something over an area.Diffusion-the scattering of light by reflection from a rough surface.
Refraction-Turning or bending of any wave.
Reflection- Image.

what is the most likely reason that a hypothesis would be useful even if experiments show that is false

Answers

Answer:

An observation is made. To understand why the phenomenon is occurring, a hypothesis is built up which can be tested by a scientific method. The result of the experiment can be true or false.

If the result false, it implies that the dependent and independent variables are not related and a new experiment must be designed or a modification is required in the experiment.

Thus, even if the result is false, the hypothesis would be useful because conclusions can be drawn from it and next course of action can be defined.

You are able to test your hypothesis if you do your experiment again.

During what phase of the moon does a solar eclipse take place01

Answers

The solar eclipse can occur only at New Moon. The lunar eclipse can occur only at Full Moon.

Please help, question is timed...

Answers

Answer:

65

Explanation:

50+3*5

An apple is placed 20.0 cm in front of a diverging lens of focal length 10.0 cm. Find the image distance and the magnification of the apple.

Answers

Answer:

Image distance of apple=-6.7 cm

Magnification of apple=0.33

Explanation:

We are given that an apple is placed 20.cm in front of a diverging lens.

Object distance=u=-20 cm

Focal length=f=-10 cm

Because focal length of diverging lens is negative.

We have to find the image distance and magnification of the apple.

Lens formula

(1)/(f)=(1)/(v)-(1)/(u)

Substitute the values then we get

-(1)/(10)=(1)/(v)+(1)/(20)

(1)/(v)=-(1)/(10)-(1)/(20)

(1)/(v)=(-2-1)/(20)=-(3)/(20)

v=-(20)/(3)=-6.7 cm

Image distance of apple=-6.7 cm

Magnification=m=(v)/(u)=(-(20)/(3))/(-20)

Magnification of apple=(1)/(3)=0.33

Hence, the magnification of apple=0.33

During which period did the first large herbivores and carnivores appear?

Answers

The first large herbivores and carnivores appeared during the Mesozoic Era, which is divided into three periods-- Triassic, Jurassic and Cretaceous. The herbivores and and carnivores increased in size during the Jurassic Period. And some of the largest dinosaurs emerged during this period as well.
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