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bagirrra123 [75]
3 years ago
10

Water cools from 68 cto 23 c in 30 min. What is the rate of temperature change?

Physics
2 answers:
trapecia [35]3 years ago
3 0
1.5 c a minute. hope it helps
Snezhnost [94]3 years ago
3 0

Answer:

-1,5º per minute.

Explanation:

To solve this we just need to divide the number of grades that the temperature cooled off between the amount of minutes in which that change was experienced:

Change in temperature= Final temperature-initial temperature

Ct=23-68=-45

we divide the -45º by the 30 minutes:

-45/30=-1,5

So we know that the water changed its temperature at -1,5 grades per minute.

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1. Where is the magnetic field most nearly uniform?
goldenfox [79]

One

A wire carrying a current creates a circular field. Not A.

B is pretty uniform. I would pick it.

C The lines bend around the north and south poles. Not C

D Same Remark as C.

Two

  • The force exerted by the magnetic field is the palm of your right hand.
  • Your thumb is the direction of the charged stream
  • The fingers are the direction of B which I take to be into the page.

If all these are in agreement with what you think you have been given then A is the correct answer. The proton will be defected in the direction of the palm.

Three

As stated in One the fingers point in the direction of B, The thumb is the direction of the charge and the palm is the direction of the force when the item is a plus charge. When the travelling charge is minus as this one is, use the back of your hand. In that case, The electron will be deflected downward. This assumes the Magnetic field is pointing into the page.

The answer is A.

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3 years ago
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A government agency would likely spend most of its budget on which of the following?
tekilochka [14]

Answer:

(B) salaries

Explanation:

correct on edg2020

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3 years ago
When using the spectroscope to view the spectra of the discharge lamps, what observations are recorded?.
natima [27]

When using the spectroscope to view the spectra of the discharge lamps, what observations are recorded by the wavelengths and colors of all bands.

<h3>Spectra of discharge lamps</h3>

The spectra of discharge lamp from spectroscope shows the different electromagnetic spectrum, they include the following;

  • Ultraviolet rays
  • Visible lights
  • Infra-red, etc

The electromagnetic spectrum consists of radiations of different wavelengths which are indicated by different color bands.

Thus, when using the spectroscope to view the spectra of the discharge lamps, what observations are recorded by the wavelengths and colors of all bands.

Learn more about spectroscope here: brainly.com/question/2114494

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3 years ago
Satellite C revolves around Earth 10 times a day. What is the radius of its orbit, measured from Earth's center? Assume that Ear
frez [133]

The radius of its orbit, measured from Earth's center, will be 1.44 × 10⁷ mm.

<h3>What is Newton's law of gravitation?</h3>

Newton's law of gravity states that each particle having mass in the universe attracts each other particle with a force known as the gravitational force.

Given data in problem is;

The mass of Earth is, \rm m_E = 5.98 \times 10^{24} \ kg

Gravitational constant, G =6.674 × 10⁻¹¹ N m₂/kg²

The gravitational force is proportional to the product of the masses of the two bodies and inversely proportional to the square of their distance.

\rm F_g = \frac{Gm_sm_e}{r^2}

The centripetal force due to rotation of the satellite;

\rm F_c = \frac{m_s v^2}{r}

The centripetal and the gravitational force are equal;

\rm F_g = F_c  \\\\  \frac{Gm_sm_e}{r^2} =  \frac{m_s v^2}{r} \\\\ r = G \frac{m_E }{v^2 } \\\\ r = G \frac{m_E }{(r \omega )^2 } \\\\ r = \sqrt[3]{\frac{Gm_E}{\omega^2}} \\\\ r = \sqrt[3]{\frac{6.67 \times 10^{-11}(5.98 \times 10^{24})}{(3.63 \times 10^{-4})^2}} \\\\ r = 1.44 \times 10^7   \ mm

Hence, the radius of its orbit measured from Earth's center will be 1.44 × 10⁷ mm.

To learn more about Newton's law of gravitation, refer to the link.

brainly.com/question/9699135.

#SPJ1

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___________ used math to show that the planets move in ellipses, not perfect circles, around the Sun.
MariettaO [177]
I believe the answer is A
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