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3 years ago

What does the thermosphere and stratmosphere have in common

1 answer:

5 0

these include the troposphere (0 to 16 km), stratosphere (16 to 50 km), mesosphere (50 to 80km) and thermosphere (80 to 640km). The boundaries between these four layers are defined by abrupt changes in temperature, and include respectively the tropopause, stratopause and mesopause.

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When do two different position-time graphs have matching velocity-time graphs?

Ivan

Answer:

when they have the same slope

8 0

3 years ago

In very cold weather, a significant mechanism for heat loss by the human body is energy expended in warming the air taken into t

Pie

Answer:

A) $Q_a=74256\ J$

B) $Q=93562560\ J$

Explanation:

Given:

temperature of air, $T_a=-19+273=254\ K$

temperature of lungs, $T_l=37+273=310\ K$

specific Heat exchanged from the lungs , $c_l=0.47\ J.kg^{-1}.K^{-1}$

specific heat of air, $c_a=1020\ J.kg^{-1}.K^{-1}$

mass of 1 L air, $m'=1.3\ kg$

breath rate, $b=21\ breath.min^{-1}$

Now,

amount of heat needed to warm the air of lungs to the body temperature:

$Q_a=m'.c_a.\Delta T$

$Q_a=1.3\times1020\times (310-254)$

$Q_a=74256\ J$

Amount of heat lost per hour:

No. of breaths per hour:

$B=b.60$

$B=21\times 60$

$B=1260$

Now the total loss of energy in 1 hr.:

$Q=Q_a.B$

$Q=74256\times 1260$

$Q=93562560\ J$

7 0

3 years ago

Opaque magenta appears to be what color under yellow light?

Sauron [17]

Answer:

The Answer is blue

3 0

2 years ago

Two people of different masses sit on a seesaw. M1, the mass of person 1, is 91 kg, M2 is 45 kg, d1 = 0.8 m, and d2 = 1.1 m. The

mash [69]

Answer:

1/ 485.6 Nm

2/ Clock-wise

3/ 0 and no direction

4/ 1.62 m

Explanation:

1/ Torque is gravity force times the moment arm. Let's g = 9.81m/s2

$T_2 = m_2*g*d_2 = 45*9.81*1.1 = 485.6 Nm$

2/ If person 2 is sitting on the right, the direction of this torque is clock-wise, since the gravity is acting downward.

3/ Assuming that location A is right at the pivot point, then the torque generated by this torque is 0, since the moment arm is 0. This has no direction.

4/ The seasaw is balanced, this means torques generated by 2 people are equal and in opposite direction

$T_1 = T_2$

$m_1gd_1 = m_2g_d_2$

$m_1d_1 = m_2d_2$

$d_2 = \frac{m_1d_1}{m_2} = \frac{91*0.8}{45} = 1.62m$

So the new location for d2 is 1.62m

5 0

2 years ago

In a minimum of two sentences, define a red giant and how a red giant forms.

Vadim26 [7]

Red Giants are the stars that currently in the late phase of the Stellar Revolution. One of the main features of a red giant is its variations on brightness.
Red Giants are formed because of the constant helium-burning process from the stars (which keep making it bigger and bigger) to the point where it almost ran out of it.

3 0

2 years ago

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