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ipn [44]
3 years ago
8

What sort of historical data can a glacier provide through an ice core?

Physics
1 answer:
ElenaW [278]3 years ago
8 0

Answer:

past temperature, composition of gases in the atmosphere

Explanation:

Cylindrical cones can be drilled out from the core of glaciers to calculate past temperatures. The air bubbles in the cones can also be used to determine the composition of air in the past yars. This information provides us a means to analyze the trend of global warming and change in concentratinos of green house gases over the years.

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The metal with the highest melting temperature is tungsten which melts at around 3400 K. What is the wavelength of the peak of t
alekssr [168]

Explanation:

It is given that, the metal with the highest melting temperature is tungsten which melts at around 3400 K, T = 3400 K

We need to find the wavelength of the peak of the black body distribution for this temperature. It can be calculated using Wein's displacement law as :

\lambda\times T=k

k is the constant, k=2.89\times 10^{-3}\ m.k

\lambda=\dfrac{k}{T}

\lambda=\dfrac{2.89\times 10^{-3}\ m.k}{3400\ k}

\lambda=8.5\times 10^{-7}\ m

or

\lambda=850\ nm

The wavelength of infrared is from 700 nm to 1 mm. So, the lies in infrared region of the spectrum. Hence, this is the required solution.

7 0
4 years ago
As electrons move about a nonpolar molecule, it causes the molecule to be, for an instant, subtly either negative or positive. w
SVEN [57.7K]
The negative charge distribution that surrounds the nucleus of an atom is due to the atom's electron cloud. As the electrons move around a molecule, it can make a certain position, for an instant, look negative when the electrons are on one side and when they are away from this side it can look positive. This can cause intermolecular attraction and is known as the London Dispersion force of attraction.
4 0
3 years ago
WILL GIVE 30 points no scams or I will report and delete Describe three machines that humans have designed and explain how the m
Stella [2.4K]

Answer:

The three machines that the human can used for designed is wheel axle , lever, inclined plane etc,...

Explanation:

5 0
3 years ago
Which of the following is a positive statement? Question 4 options: A) A humidity level of 90 percent is too high. B) Summer eve
nika2105 [10]

Answer:

A) A humidity level of 90 percent is too high.

Explanation:

A humidity level of 90% is too high . It reflects real or possible situation .

Atmospheric temperature between 20 -  30 degree makes comfortable weather.  70 or 80 or 90 degree atmospheric temperature is impossible to achieve on the earth in normal case. The maximum temperature upto which

atmospheric temperature has  gone  is 55 degree .

So all the other statements appear to be false.

6 0
4 years ago
1. An automobile traveling at 25 km/hour has kinetic energy equal to 1x 10^4J.
aleksandrvk [35]

Explanation:

It is given that,

Speed of an automobile is 25 km/h or 6.95 m/s

Kinetic energy of the automobile is 10^4\ J

(a) Kinetic energy of automobile s given by :

K=\dfrac{1}{2}mv^2\\\\m=\dfrac{2K}{v^2}\\\\m=\dfrac{2\times 10^4}{(6.95)^2}\\\\m=414\ kg

(b) If the velocity of the car is increased to 45 km/hour or 12.5 m/s, new kinetic energy becomes :

K=\dfrac{1}{2}\times 414\times (12.5)^2\\\\K=32343.75\ J

(c) If the velocity is increased to 80 km/hour, 22.23 m/s, So

K=\dfrac{1}{2}\times 414\times (22.23)^2\\\\K=102293.79\ J

Hence, this is the required solution.

3 0
4 years ago
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