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True or false. Orbiting astronauts feel weightless because they are beyond the gravitational pull of the earth?
False.Orbiting astronauts feel weightlessness since the gravitational pull of the Earth is balanced by the centrifugal force due to the circular orbital motion, which balance each other out since the spaceship is in orbit. That is, the weightlessness is because of no net force on the astronaut.In a nutshell, if you are orbiting, then irrespective of what height you're doing it, you'd be weightless.
How could working underwater help astronauts practice being in space?
Because if weighted properly, they can be neutrally boyant. In other words, they're as close to weightless as they can get on earth. The astronauts train underwater to give them a sense of what its like to do their task while weightless and also to practice the peocedures required for their task. The first astronaut to take advantage was Buzz Aldrin when he trained for his Gemini 12 mission. Aldrin was and is still an avid scuba diver. He noticed the similarity between water and space. His succees on Gemin 12 made underwater training the norm for all astronaut extravehicular training.
What is a true scary story?
Schindler's List or In Cold Blood or Hotel Rawanda all true, truly scary stories.
Why do astronauts feel weightless when they are in orbit?
True "zero gravity" occurs for orbiting spacecraft because the vehicle is in effect in "freefall" around the planet : although gravity is trying to pull it down, its horizontal motion carries it on an arc past the planet. For spacecraft sufficiently far from Earth (several thousand miles), there is imperceptibly low gravity. The acceleration force gravity exerts is reduced as the square of the distance from the center of gravity. While enroute to the Moon, Apollo astronauts reached locations where the gravity from the Earth and Moon were almost exactly opposite and tended to cancel each other. When spacecraft approach the Moon or Earth, local gravity begins to exert a larger force, and unless an orbit is achieved as above, it will be dragged down to the surface or into the atmosphere. *Technically, the virtually imperceptible force experienced is called "microgravity" because the net forces of gravity from the Earth, Moon, and Sun still affect objects in orbit.
Is it true that the space race began in 1997 when the soviet union launched the satellite sputnik you in to orbit the us responded by speeding up its own space program?
No. Sputnik was launched in 1957
The statement that astronauts on the Moon are weightless is?
The statement that astronauts on the Moon are weightless is true.
Astronaunts in orbit are not truly weightless True or false?
True; they are not "weightless". Every object has mass, and mass generates gravity. So a person (who has mass) near the Earth (which has mass) will have a weight that is dependent on the sum of the masses divided by the square of the distance between them. So astronauts in orbit are being affected by the gravity of the Earth, which is close, and by the Sun, which is farther away but is far more massive. To some tiny extent, all of us are also affected by the gravities of the Moon and other planets such as Venus, Mars and Jupiter, and even by the other stars - and other galaxies. But those are so far away that the effect is entirely negligible. So why don't the astronauts FEEL the affects of gravity? Because they, and the ISS, are in "free fall"; they are falling toward the Earth. But because they are moving a bit over 18,000 miles per hour, the ISS and the astronauts keep MISSING the Earth! It's a delicate balance - falling AROUND the Earth, without ever hitting it.
True or false. Orbiting astronauts feel weightless because they are beyond the gravitational pull of the earth?
False.Orbiting astronauts feel weightlessness since the gravitational pull of the Earth is balanced by the centrifugal force due to the circular orbital motion, which balance each other out since the spaceship is in orbit. That is, the weightlessness is because of no net force on the astronaut.In a nutshell, if you are orbiting, then irrespective of what height you're doing it, you'd be weightless.
Why do astronauts feel weightlessness?
They feel weightless because they are indeed weightless when in orbit, in effect in freefall. Gravity tries to pull them down but the spacecraft motion carries it "past the planet" in an arc that is part of a circular or elliptical orbit. If the spacecraft slows down, it will be pulled toward the Earth by the considerable gravitational force. If an astronaut tries to use an ordinary scale to measure her weight, all attempts will be useless. The vessel she is in is under the influence of Earth's gravity, it is true, as is her body. But the vessel and her body are in the same orbit, at the same velocity. If she is motionless at the center of the vessel, no unbalanced forces will push her "down" toward the floor or hull of the vessel. And if there are some unbalanced forces, they are so small as to be negligible for all practical purposes. She will not be able to 'step' onto a scale, unless she is in some kind of rotating vessel, which would provide a kind of artificial gravity.
What is the adverb of true?
truly
How do you spell truer?
The correct spelling is truly (actually, really).
What is true about asteroids?
Asteroids orbit the Sun, and some of them can cross the Earth's orbit.
How could working underwater help astronauts practice being in space?
Because if weighted properly, they can be neutrally boyant. In other words, they're as close to weightless as they can get on earth. The astronauts train underwater to give them a sense of what its like to do their task while weightless and also to practice the peocedures required for their task. The first astronaut to take advantage was Buzz Aldrin when he trained for his Gemini 12 mission. Aldrin was and is still an avid scuba diver. He noticed the similarity between water and space. His succees on Gemin 12 made underwater training the norm for all astronaut extravehicular training.
Was it true that the Apllo 13 astronauts were excited to land safely on the earth?
Yes all three astronauts and their family were exited when they returned safely to earth.
Is it true that the earth has an orbit of 28 days?
No, The earth's orbit is slightly over 365 days
Is it true the first person to orbit earth was Yuri gagarin?
Yes, it is true.
Saturn takes 30 years to orbit the sun True or False?
true
