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ra1l [238]
4 years ago
13

Scientists generally agree that Earth is getting warmer due to what's called the greenhouse effect. A greenhouse used for plants

stays warm because sunlight and heat coming through the glass roof are mostly trapped. The heat doesn't radiate back into the atmosphere because it's partly trapped by the glass. Something like that happens on Earth. The atmosphere acts like a blanket that keeps the Sun's heat from leaking away into space.
7. The main conclusion you can draw from this paragraph is ...
Physics
1 answer:
umka21 [38]4 years ago
7 0
As heat enters the surface of the Earth the gas traps it and is not radiated it's absorbed. 
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A cylindrical fishing reel has a mass of 0.7 kg and a radius of 5.24 cm. A friction clutch in the reel exerts a restraining torq
Korolek [52]

Answer:

Explanation:

moment of inertia of reel = 1/2 mr² , m is mass and r is radius of the reel

= .5 x .7 x .0524²

= 96.1 x 10⁻⁵

If force required be F

F  x .0524 - 1.88 is net torque acting on the reel

F  x .0524 - 1.88 = moment of inertia x angular acceleration.

F  x .0524 - 1.88 = 96.1 x 10⁻⁵ x 65.7

F  x .0524 - 1.88 = .063

F  x .0524  = .063 + 1.88

F = 37.08 N

7 0
3 years ago
Ina shoots a large marble (Marble A, mass: 0.08 kg) at a smaller marble (Marble B, mass: 0.05 kg) that is sitting still. Marble
stich3 [128]

From the calculations, the final momentum of B is 8.16 m/s

<h3>What is conservation of linear momentum?</h3>

According to the principle of the conservation of linear momentum, the momentum before collision is equal to the total momentum after collision.

This implies that;

MaUa + MbUb = MaVa + MaVa

Substituting values;

(0.08 kg * 0.5 m/s) + (0.05 kg * 0 m/s) = (0.08 kg * −0.1 m/s) + (0.05 kg * v)

0.4 = -0.008 + 0.05v

v = 8.16 m/s

Learn more about more about momentum: brainly.com/question/24030570:

#SPJ1

3 0
2 years ago
A 120 W lightbulb and a 90 W lightbulb each operate at a voltage of 120 V. Part A Which bulb carries more current? Which bulb ca
uysha [10]

Answer:

120 W lightbulb

Explanation:

Let the two lightbulb be A and B respectively.

Given the following data;

Power A = 120W

Power B = 90W

Voltage = 120V

To find the current flowing through each lightbulb;

a. For lightbulb A

Power = current * voltage

120 = current * 120

Current = 120/120

Current = 1 Ampere.

b. For lightbulb B

Current = power/voltage

Current = 90/120

Current = 0.75 Amperes

Therefore, the lightbulb that carries more current is A with 1 Ampere.

7 0
3 years ago
How does the rate of groundwater flow compare with that of ocean currents or river currents? Choose one: A. The rate of groundwa
ioda

Answer:

A. The rate of groundwater flow is faster than that of surface-water currents

Explanation:

A velocity of 1 foot per day or greater is a high rate of movement for ground water, and ground-water velocities can be as low as 1 foot per year or 1 foot per decade. In contrast, velocities of streamflow generally are measured in feet per second.

Horizontal movements are called currents, which range in magnitude from a few centimetres per second to as much as 4 metres (about 13 feet) per second. A characteristic surface speed is about 5 to 50 cm (about 2 to 20 inches) per second.

An ocean current is any more or less permanent or continuous, directed movement of ocean water that flows in one of the Earth's oceans. The currents are generated from the forces acting upon the water like the earth's rotation, the wind, the temperature and salinity differences and the gravitation of the moon

7 0
4 years ago
A body accelerate uniformly from rest at 0.2m/s for one-fifth of a minute. Calculate the distance covered by the body.​
PtichkaEL [24]

Answer:

<h2>14.4 m</h2>

The distance covered by the body is <u>1</u><u>4</u><u>.</u><u>4</u><u> </u><u>m</u><u>.</u>

<u>Sol</u><u>ution</u><u>,</u>

Initial velocity(u)= 0 m/s( according to Question, the body starts from rest.that's why initial velocity(u) becomes zero.

Acceleration (a)= 0.2 m/s

Time (t):

\frac{1}{5} minute =  \frac{1}{5 }  \times 60 \: seconds

= 12 \: seconds

Now,

Applying third equations of motion:

s = ut +  \frac{1}{2} a {t}^{2}  \\ s = 0 \times 12 +  \frac{1}{2}  \times 0.2 \times  {(12)}^{2}  \\s = 0 + 14.4 \\ s = 14.4 \: metre

Thus, the distance covered by the body is 14.4 metre.

Further more information:

<h3><u>Application</u><u> </u><u>of</u><u> </u><u>equation</u><u> </u><u>of</u><u> </u><u>motion</u><u> </u><u>in</u><u> </u><u>differ</u><u>ent</u><u> </u><u>situa</u><u>tion</u><u>:</u></h3>
  • When a certain object comes in motion from rest, in the case, initial velocity(u)= 0 m/s
  • When a moving object comes in rest,in the case, final velocity(v)= 0 m/s
  • If the object is moving with uniform velocity, in the case, (u=v)
  • If any object is thrown vertically upward, in the case, acceleration (a)= -g
  • When an object is falling from certain height, in the case, u= 0 m/s
  • When an object is thrown vertically upwards in the case, final velocity at maximum height becomes 0.

4 0
4 years ago
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