PHYSICS MIDDLE SCHOOL

The rate at which work is done is called

Answers

Answer 1
Answer:

Answer:

The rate at which work is done is called Power.

Explanation:

Power is work done per unit time. or it can also be defined as ratio of work done to time taken to complete the work.

Mathematically the power (P) is given as:

Power(Watts)=(W(Joules))/(T(seconds))

1 watt = 1 Joule/second

Where:

W = Work done in time T.

T = Time taken to complete the work

The rate at which work is done is called Power.
Answer 2
Answer: Power is the rate at which work is done, measured in Joules per second 

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A graduated cylinder is filled to an initial volume of 12.7 ml. A rock Is dropped into the graduated cylinder. The final volume of the graduated cylinder is 18.2ml. What is the Rocks volume in both ml and cm3? What method was used to determine this?

Answers

Answer:

V = 5.5 mL

Explanation:

The volume filled in the graduated cylinder is 12.7 mL

now when a stone is dropped into the cylinder then the volume of liquid is raised to final level of 18.2 mL

so as per the theory of given by Archimidies we can say that the volume of the object is exactly same as the volume displaced by the object

So here the volume displaced by the object is given as

V_(displaced) = V_f - V_i

V_(displaced) = 18.2 mL - 12.7 mL

V_(displaced) = 5.5 mL

so the volume of the object is given as

V = V_(displaced)

V = 5.5 mL
First of all, ml and cm^3 are equal. The volume of the rock is 5.5 ml. This is found by subtracting the volume of just the water from the combined volume of the rock and the water leaving you with just the volume of the rock. This is method is using water displacement.

Marina is creating a flow chart of the mechanics of mantle convection and how it relates to tectonic plate movement.

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Evidence of the existence of large-scale convection in the mantle from the top to the bottom of the mantle is the density of the material in the lower mantle according shock compression silicates. Calculations showed that under appropriate pressure and temperature distribution of the density in both parts of the mantle are well distributed density oceanic lherzolites - breeds raised in the transform faults of the ocean floor. This is evidence of the homogeneity of the chemical composition of the mantle at the same time is an indirect indication of the existence of large-scale convection in it, constantly stirring its substanceAnd this convection drives plate tectonics

What is the main function of the nuclus

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Nucleus is known as "the control center of the cell"
It does what it sounds like, main function of a nucleus is to maintain the integrity of the genes and to control the activities of the cell, making sure to regulate the gene expression.
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Help please!
Which of the following are valid names for the equinoxes?

Answers

Vernal Equinox and Autumn Equinox and Winter and Summer Solstice. :D Hope that helps.  

There is a Spring equinox (March in the northern hemisphere), and a Fall equinox (September).

The shortest wavelengths occur in the:red end of the spectrumblue end of the spectrummiddle of the spectrum The light-gathering capacity of a telescope is dependent upon the:magnificationfocal lengthsize of human irisarea of aperture

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The shortest visible wavelength is the last color you can see
at the blue end of the spectrum.

The light-gathering capacity of a telescope depends on the area
of the main lens in the front, or the main mirror in the back.
That's also the area of the opening of the tube, called the 'aperture'.

What is the momentum of a 2500-kg car traveling at 4.92 m/s?

Answers

Momentum = mass times velocity

mass = 2500kg

velocity = 4.92 m/s

Therefore momentum = 2500 x 4.92

                                     = 12300 Kg m/s
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