2 years ago

Which of the following four circuit diagrams best represents the experiment described in this problem?

1 answer:

6 0

We don't see any circuit diagrams.

This worries us for a few seconds, until we realize that we don't know anything about the experiment described in the problem either, so we don't have to worry about it at all.

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Venus has an average distance to the sun of 0.723 AU. In two or more complete sentences, explain how to calculate the orbital pe

Otrada [13]

For this task we need to use Kepler's third law:

T = 2*pi* $\sqrt{ \frac{ r^{3}}{G*M} }$

where T is orbital period in seconds, r is Venus's semi-major axis, G is gravitational constant and M is mass of the sun.

Distance from earth to sun is 1AU so if we know earths period and distance from the sun we can calculate Venus period.
Te-earths period
Tv-venus period

$\frac{Te}{Tv} = \sqrt{ \frac{ Re^{3} }{ Rv^{3} } }$

From the text we know that Re/Rv = 1/0.723

Which means that:
$Tv = \sqrt{0.723^3} * Te$

Tv = 0.614 Te

5 0

2 years ago

A sphere has surface area 1.25 m2, emissivity 1.0, and temperature 100.0°C. What is the rate at which it radiates heat into empt

Yuri [45]

The total power emitted by an object via radiation is:
$P=A\epsilon \sigma T^4$
where:
A is the surface of the object (in our problem, $A=1.25 m^2$
$\epsilon$ is the emissivity of the object (in our problem, $\epsilon=1$ )
$\sigma = 5.67 \cdot 10^{-8} W/(m^2 K^4)$ is the Stefan-Boltzmann constant
T is the absolute temperature of the object, which in our case is $T=100^{\circ} C=373 K$

Substituting these values, we find the power emitted by radiation:
$P=(1.25 m^2)(1.0)(5.67 \cdot 10^{-8}W/(m^2K^4)})(373 K)^4=1371 W = 1.4 kW$
So, the correct answer is D.

6 0

2 years ago

Which best describes the importance of mitosis to living organisms? genetic variation and growth growth and development developm

Scrat [10]

Answer:

Explanation:

Mitosis is important for growth and development of living organisms.

8 0

2 years ago

The maximum efficiency of a heat engine operating between 2 degrees c and 200 degrees c will be about:

Bess [88]

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