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2 years ago

As planets move toward the sun, they tend to: A. move at constant speed B. speed up C. burn up D. slow down

Physics

1 answer:

dolphi86 [110]2 years ago

8 0

Answer:

B. speed up

Explanation:

The acceleration of an object due to a body's gravity is:

g = GM / r²

where G is the universal constant of gravitation,

M is the mass of the body,

and r is the distance from the body.

As a planet approaches the sun, r decreases. As r decreases, g increases.

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The diagram shows a stone suspended under the surface of a liquid from a string. The stone experiences a pressure caused by the

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Where is the diagram? What is the question?

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2 years ago

Indigenous people sometimes cook in watertight baskets by placing hot rocks into water to bring it to a boil. What mass of 500ºC

scoray [572]

Answer:

m = 4.65 kg

Explanation:

As we know that the mass of the water that evaporated out is given as

$m = 0.0250 kg$

so the energy released in form of vapor is given as

$Q = mL$

$Q = (0.0250)(2.25 \times 10^6)$

$Q = 56511 J$

now the heat required by remaining water to bring it from 15 degree to 100 degree

$Q_2 = ms\Delta T$

$Q_2 = (4 - 0.025)(4186)(100 - 15)$

$Q_2 = 1.41\times 10^6J$

total heat required for above conversion

$Q = 56511 + 1.41 \times 10^6 = 1.47 \times 10^6 J$

now by heat energy balance

heat given by granite = heat absorbed by water

$m(790)(500 - 100) = 1.47 \times 10^6$

$m = 4.65 kg$

4 0

2 years ago

An automobile tire is filled to a pressure of 240.0 kPa early in the morning when the temperature is 15.0C. After the car is dri

yuradex [85]

Answer:

Explanation:

According to one of the gas laws, $\frac{P1}{T1} =\frac{P2}{T2}$

Given P1 = 240.0kPa, T1, 15.0°C, T2 = 18.0°C, P2 = ?

Substituting this values into the equation, we have;

$\frac{240}{15+273} =\frac{P2}{18+273}\\\frac{240}{288} =\frac{P2}{291}\\$

Cross multiplying we have;

288P2 = 240*291

$P2 = \frac{240*291}{288} \\P2 = 242.5kPa$

The new pressure is 242.5kPa

5 0

2 years ago

Light from a lamp is shining on a surface. how can you increase the intensity of the light on the surface?

vlada-n [284]

The intensity of a light in a surface follows the inverse square law formula which can be mathematically expressed as,
I = k/d²
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2 years ago

The starter armature is rubbing on the field coils. technician a says the bushings need to be replaced. technician b says the br

Viefleur [7K]

In a situation in which the smarter armiture is rubbing on the field the most commin reason are defective bushings. So, the ststement the techician A ssys that the brushings shojld be replaced is correct. Techinican A is right.

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2 years ago

Read 2 more answers