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2 years ago

The greenhouse effect that raises the surface temperature of planets

Physics

1 answer:

PSYCHO15rus [73]2 years ago

3 0

Answer:

Explanation:

Green house effect:

Temperature of atmosphere is going to increased continuously, because infrared light absorbed by gas .This increased in temperature atmosphere is called green house effect.

The green houses gases are as follows

,Carbon diaoxide,water vapor ,,Carbon diaoxide ,Methane ,,Carbon diaoxide oxide,CFCs ,ozone.

So the option c is correct.

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Little Susie is enjoying a nice spherical lollipop. She sucks the lollipop in such away that the circumference decreases by 1 ce

Brums [2.3K]

Answer:

-50 cm^3/min

Explanation:

The volume of the lollipop is given by

$V=\frac{4}{3}\pi r^3$

where r is the radius in centimeters.

To find how fast the volume changes, we need to find the rate of change of the volume, which is given by its derivative with respect to time:

$\frac{dV}{dt}=4\pi r^2 \frac{dr}{dt}$ (1)

where

dr/dt is the rate of change of the radius

We know that the circumference is

$C=2\pi r$

and it decreases by 1 cm per minute, so

$\frac{dC}{dt}=2\pi \frac{dr}{dt}=-1$ (cm/min)

from which we find dr/dt:

$\frac{dr}{dt}=-\frac{1}{2\pi}$

Substituting into (1),

$\frac{dV}{dt}=4\pi r^2 \frac{1}{2\pi}=-2r^2$ (cm^3/min)

And substituting r = 5, we find the rate of change of the volume when the radius is 5 cm:

$\frac{dV}{dt}=-2(5)^2=-50$ (cm^3/min)

8 0

2 years ago

A climber using bottled oxygen accidentally drops the oxygen bottle from an altitude of 4500 m. If the bottle fell straight down

Trava [24]

Answer:

v= 300 m/s

Explanation:

Given that

altitude ,h= 4500 m

The mass ,m = 3 kg

Lets take acceleration due to gravity , g= 10 m/s²

The speed before impact at sea level = v

Initial speed ,u = 0 m/s

We know that

v²=u²+2 g h

v=final speed

u=initial speed

h=height

Now by putting the values in the above equation

v² = 0²+ 2 x 10 x 4500

v²=90000

v= 300 m/s

Therefore the speed at sea level will be 300 m/s.

3 0

2 years ago

The volume of a rectangular prism is given by the formula V = lwh, where l is the length of the prism, w is the width, and h is

Verizon [17]

For this case the volume of the box is given by:
 $V = lwh
$
 Substituting values we have:
 $V = (2a + 11) (5a - 12) (a + 6)
$
 Rewriting we have:
 $V = (10a ^ 2-24a + 55a-132) (a + 6)

V = 10a ^ 3-24a ^ 2 + 55a ^ 2-132a + 60a ^ 2-144a + 330a-792$
 Grouping terms of equal degree we have:
 $V = 10a ^ 3 + 60a ^ 2 -24a ^ 2 + 55a ^ 2 -132a -144a + 330a-792$
 Adding terms of equal degree we have:
 $V = 10 ^ 3 + 91a ^ 2 + 54a-792
$
 Answer:
the volume of the box is:
All the expressions given.

4 0

2 years ago

Cassie lives two miles away from school. Which mode of transport could benefit her health?

lord [1]

B.) Riding a bicycle to school.

4 0

3 years ago

Read 2 more answers

Vector c has a magnitude 24.6 m and is in the direction of the negative y-axis. vectors a and b are at angles Î± = 41.4Â° and Î²

storchak [24]

The vector c has a magnitude of 24.6m and it is in the negative y direction. Therefore
$\vec{c} = - 24.6 \hat{j}$

The vector b is 41.4° up from the x-axis. Therefore
$\vec{b} = b[cos(41.4^{o}) \hat{i} + sin(41.4^{o}) \hat{j} ] =b(0.75\hat{i} + 0.6613 \hat{j})$

The vector a is 27.7° up from the x-axis. Therefore
$\vec{a} = a[cos(22.7^{o})\hat{i} + sin(27.7^{o})\hat{j}] = a(0.8854\hat{i} + 0.4648\hat{j})$

Because $\vec{a} +\vec{b} + \vec{c} = 0$ , the sum of the x and y components should be zero. Therefore,
For the x-component,
0.8854a + 0.75b = 0
or
a + 0.847b = 0 (1)
For the y-component,
0.4648a + 0.6613b - 24.6 = 0
or
a + 1.4228b = 52.926 (2)

Subtract (1) from (2).
0.5758b = 52.926
b = 91.917
a = -0.847b = -77.854

Answer:
The magnitude of vector a is -77.85 m
The magnitude of vector b is 91.92 m

5 0

3 years ago