Which of the following is an advantage of radar reconnaissance over photoreconnaissance?     radar can be used to image the night hemisphere of the Earth     radar can be used to image features that are obscured by clouds     radar satellites do not need to be sun-synchronous, and can launch to the east

Q: A man’s eyes 2.5 m above sea level can barely see the top of a lighthouse which is at a certain…

A:

Q: A man’s eyes 2.5 m above sea level can barely see the top of a lighthouse which is at a certain…

A:

Q: The ____________ is the most important layer of the ionosphere for refracting HF radio wave and at…

A: Ionisation is the process in which electrically charged and neutral atoms and molecules gain or lose…

Q: An observer standing on the deck of a ship just sees the top of a lighthouse. The top of the…

A: Given: The top of the light house is h1=40 m. The height of the observer eye is h2=5 m. The…

Q: man’s eyes 2.5 m above sea level can barely see the top of a lighthouse which is at a certain…

A: Light h1 is height of of man eye's from sea level h2 height of tower from sea level.

Q: Choose the best answer to the following: Atmospheric pressure is due to the weight (a) of the…

A: Atmospheric pressure is the force per unit area applied against a surface by the weight of the air…

Q: The light of distant stars is affected by: A) Interstellar Dust B) The Earth's Atmosphere C) Both A…

A: The light of distant stars is affected by Interstellar Dust and Earth's atmosphere.

Q: also say between two latitudes you must add the values together if they are in opposite hemispheres…

A: According to question  Additional if they are in opposite hemisphere

Q: Maps of moon are upside down? Why.

A: Maps of the moon are upside down because:

Q: A rock salt prism is used instead of glass prism to obtain the infrared spectrum?

A: The infrared spectrum will be absorbed by a glass prism. Hence, we cannot see the infrared spectrum…

Q: It is a pair of a crest and a trough. O frequency O wavelength O speed O cycle

A: A Option 2 is correct Wavelength is the correct answer  The highest surface part of a wave is called…

Q: In aviation, it is helpful for pilots to know the cloud ceiling, which is the distance between the…

A:

Q: Name two sources of each of infrared radiations and ultraviolet radiations.

A: One of the primary sources of infrared radiation is the heat or thermal radiation. IR rays are…

Q: Manuel is scuba diving near a school of fish at a depth of −9.5 feet relative to sea level. Then he…

A:

Q: man’s eyes 2.5 m above sea level can barely see the top of a lighthouse which is at a certain…

A:

Q: Even if the Earth's orbit were circular, we would still have seasons. The reason is that…

A:

Q: You have enrolled in a scuba diving class and while swimming under water in a nearby lake you look…

A: According to Snell's law,  n1sinθi=n2sinθrsinθr=n1n2sinθiθr=sin-1n1n2sinθi

Q: The Hubble Space Telescope has a diameter of 2.40 m. (a) What is the smallest the Moon? (Distance to…

A: Given-The Hubble space Telescope has diameter D=2.40 mDistance to the Moon d=3.84×108 m

Q: world’s largest cut diamond id the First  Star of Africa. Its volume is 4.81 cubic inches. What is…

A:

Q: Why is the sky blue? Our eyes are not very sensitive to violet light. O The molecules and atoms in…

A: The wavelength of the blue light is shorter than the other  visible light therefore blue light is…

Q: describe objects or parts of objects on which Vernier caliper or micrometer can be more appropriate…

A: Both Vernier caliper and micrometre are dimension measuring devices. Least count of vernier caliper…

Q: What is the use of main scale in vernier caliper

A: The use of the main scale in vernier caliper:- The main scale in the vernier caliper is used for the…

Q: Solar Zenith Angle at Nordlysstasjonen 60 Daylight 80 100 Evening/Nighttime 120 100 200 300 Day of…

A: The Earth progresses through its seasons because its north-south axis has a 23.5-degree tilt. During…

Q: 40° -24 m- When the Sun's elevation angle is 40°, the shadow of a tree has a length of 24m. The…

A: Given data:  Elevation angle (θ) = 40° Length of shadow of a tree = 24 m

Q: Give a complete description of these three categories of energy relative to each other in terms of…

A: The electromagnetic spectrum is comprised of different types of electromagnetic radiation, which…

Q: Which has the shorter wavelengths, ultraviolet or infrared? Which has the higher frequencies?

A: Frequency and wavelength are inversely proportional quantities: The electromagnetic spectrum is…

Q: Solar Zenith Angle at Nordlysstosjonen 60 Daylight 80 100 Evening/Nighttime 120 Maxima Midnight…

A: Angle between the sun's ray and vertical direction create an angle known as Solar Zenith Angle

Q: I am flying from Kansas City to Denver. My flight leaves Kansas City at 4:30 pm. I land in Denver at…

A: Kanas city is 1 hour ahead of Denver If you leave Kanas city at 4:30 pm, Then time in denver is 3:30…

Q: The planetarium is making a scale model of the solar system. If they use a basketball to represent…

A: Let us assume the radius of the basketball is r cm. Now, we know that the average radius of the sun:…

Q: If you were an observer on Mars looking at the earth through a telescope would you see the earth…

A: To find: If you were an observer on Mars looking at the earth through a telescope would you see…

Q: Explain phenomenon of Advance sunrise and delayed sunset.

A:

Q: The day's total radiation on a horizontal surface for Amman, Jordan (latitude 30-), on September 15…

A: Given  Latitude =300  Radiation  (S)=27 MJ/m2

Q: Which have shorter wavelengths, ultraviolet or infrared? Which has the higher frequencies?

A: Ultra-violet radiation has shorter wavelength. They have a wave length range of 1 nm to 400 nm…

Q: The water depth in a harbour is 17.8 m at high tide and 10.2 m at low tide. One cycle takes 12.4…

A:

Q: Which of the following explain why far infrared astronomy must be done from high-flying aircraft?…

A: Far infrared astronomy is a branch of astronomy which deals with the objects that are visible in…

Q: ng the Across and Down clues. 2. 3. Across Down 1 Completely illuminated moon 2 Complete shadow of…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: On a vertical scale of altitude in kilometers and miles above sea level, compare the heights of the…

A: Pike's peak = 14000 ft Top of mt. everest = 29000 ft Commercial airline flight = 35000 ft Supersonic…

Q: A meter stick, held vertically on a level ground, casts a shadow of 2meters long. Solve for the…

A: In this question we have to find the tangent and the angle. Please give positive feedback if the…

Q: You are standing at Earth's North Pole.  It is dark, and the stars are out.  What is an accurate…

A: Polaris also known as the northern star can be easily seen from north pole. Here we need to…

Q: What is the inner diameter and outer diameter of the object shown in the image ?

A: The measurement device shown in the image is a ruler. In a ruler, the smallest division is 1 mm.

Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.