A pearl Harbor. that was when we went from staying neutral to entering the war
Answer:
Insolation is the amount of solar radiation that reaches the earth's surface through shortwaves. The earth also radiates heat energy like all other hot object. This is known as terrestrial radiation. The annual mean temperature on the surface of the earth is always constant.
Explanation:
The energy emitted by the sun is known as solar radiation. The incoming solar radiation to the earth is known as insolation. Radiation from the earth is called terrestrial radiation.
Answer:
Solar radiation is all the radiant energy emitted by the sun. Solar irradiance is the power per unit area received from the Sun in the form of electromagnetic radiation measured in space or at the Earth's surface. Isolation is the total solar radiation that reaches the earth's surface.
These are all matching questions
1. Sanction. Countries may place restrictions between each other if they can not come to an agreement that benefits both.
2. Embargo. Example- The U.S. and Cuba have had an embargo. Neither country will trade with the other.
3. Quota. This allows only a certain amount of a product to come into a place. This may be a good thing if a substance is illegal or if the substance or product could somehow be used for the wrong reasons.
4. Subsidy. Sometimes the government will help farmer's by giving them money to plant certain crops. This helps both the economy and the farmer.
5. (Protective)Tariff
6. Boycott. People could boycott a store, if they do not agree with company's beliefs. An example would be Target allowing Transgenders into women's restrooms.
Answer: 
Explanation:
The Tropic of Cancer is one of the parallels (imaginary line around the Earth parallel to the equator) located in the northern hemisphere (currently its latitude is 
).
It is called "Cancer" because a long time ago, when the summer solstice occurred in the northern hemisphere (on June 20th or 21st), the Sun was in the constellation Cancer (the crab).
Now, if we were just in the North Pole, Polaris would by exactly over our heads (
over the horizon), but as we go south and find the Tropic of Cancer parallel, Polaris altitude will be approximately at an angle of over the horizon.
Hence, the altitude of Polaris measured by an observer at the Tropic of Cancer is .
Answer:The angular seperation is 
Explanation:
For two objects separated by a distance 's' and at a distance 'd' from the observer the angular separation ignoring the physical effects is given by
In the given question
light years
We know that in 1 light year there are 
Using the calculated values we get
Since π radians equals 180 degrees thus we have
