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3 years ago

Compare and contrast the thermosphere with the troposphere

1 answer:

5 0

The troposhere is the lowest layer of the Earth's atmosphere and the thermosphere is the second, above the mesosphere and below the exosphere.
Thermosphere is the largest of all the layers. It is within the thermosphere that ultraradiation causes ionization.
The troposhere is where 99% of the water vapor and aerosols are found. It is denser than the layers above it because of the weight compressing it. The troposphere as well contains approximately 75% of the mass of the atmosphere. Most of the world's weather takes place in the troposhere.

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A dog is chasing a rabbit at 20 m/s. The dog trips and falls but is not hurt. 10 poi

Masteriza [31]

10 ms/s/s your welcome :)

6 0

3 years ago

QUICK

sashaice [31]

Answer:

The answer is: Increase the Number of Ropes/Pulleys.

Explanation:

A "pulley" is an object that supports a particular movement such as supporting a force's change in direction (provided that the direction is applied to a cord). This is regarded as a "simple machine" consisting of a wheel on an axle. This helps guide cables or ropes.

This machine is used in order to decrease the amount of time it takes to do work, such as lifting of objects.

Remember that "mechanical advantage" refers to the ratio between the force applied to a machine and the force produced by it. So, when it comes to pulleys, the mechanical advantage increases when the number of ropes are also increased. They are directly proportional. This goes the same way with increasing the number of pulleys. Once you increase the number of pulleys, the mechanical advantage also increases.

8 0

3 years ago

Your spaceship lands on an unknown planet. To determine the characteristics of this planet, you drop a wrench from 4.50 m above

Virty [35]

$8.98×10^6\:\text{m}$

Explanation:

First we need to find the acceleration due to gravity on the planet. The wrench took 0.809 s to fall from a height of 4.50 m so we can use the equation

$y = -\frac{1}{2}gt^2$

Solving for g, we get

$g = -\dfrac{2y}{t^2} = -\dfrac{2(-4.50\:\text{m})}{(0.809\:\text{s})} = 13.8\:\text{m/s}^2$

Recall that the acceleration due to gravity on a planet's surface can be written as

$g = G\dfrac{M_p}{R_p^2}$

We can express the mass of the planet $M_p$ in terms of its density $\rho$ as follows:

$M_p = \rho \left(\dfrac{4\pi}{3}R_p^3\right) = \dfrac{4\pi}{3}\rho R_p^3$

The expression for g then becomes

$g = \dfrac{G}{R_p^2} \left(\dfrac{4\pi}{3}\rho R_p^3\right) = \dfrac{4\pi G}{3}\rho R_p$

Solving for $R_p,$ we get

$R_p = \dfrac{3g}{4\pi G\rho}$

$\:\:\:\:\:\:\:= \left[\dfrac{3(13.8\:\text{m/s}^2)}{4\pi (6.674×10^{-11}\:\text{Nm}^2\text{/kg}^2)(5500\:\text{kg/m}^3)}\right]$

$\:\:\:\:\:\:\:= 8.98×10^6\:\text{m}$

3 0

3 years ago

A localized impediment to electron flow in a circuit is a:

hichkok12 [17]

This would be the definition of a resistor. These components inhibit or “resist” the flow of a current.

Hope this helps!

8 0

4 years ago

Read 2 more answers

Xelga [282]

Answer:

About 7.67 m/s.

Explanation:

Mechanical energy is always conserved. Hence:

$\displaystyle \begin{aligned} E_i & = E_f \\ \\ U_i + K_i &= U_f + K_f\end{aligned}$

Where U is potential energy and K is kinetic energy.

Let the bottom of the slide be where potential energy equals zero. As a result, the final potential energy is zero. Additionally, because the child starts from rest, the initial kinetic energy is zero. Thus:

$\displaystyle U_i = K_f$

Substitute and solve for final velocity:
$\displaystyle \begin{aligned} mgh_i &= \frac{1}{2}mv_f^2 \\ \\ 2gh_i &= v^2_f \\ \\ v_f &= \sqrt{2gh_i} \\ \\ & =\sqrt{2(9.8\text{ m/s$^2$})(3.00\text{ m})} \\ \\ & \approx 7.67\text{ m/s} \end{aligned}$

In conclusion, the child's speed at the bottom of the slide is about 7.67 m/s.

8 0

2 years ago