Tag: physics

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Questions Related to physics

Multiple choice physics units and measurement: error analysis accuracy of measurement accuracy and precision accuracy, precision and uncertainty in measurement

Which of the following measurements is most accurate?

  1. $0.005 mm$

  2. $5.00 mm$

  3. $50.00 mm$

  4. $5.0 mm$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Accuracy in measurement is often indicated by the number of significant figures and the relative error. 50.00 mm has the most significant figures and the smallest relative error among the choices.

Multiple choice physics units and measurement: error analysis accuracy of measurement accuracy and precision accuracy, precision and uncertainty in measurement

The mathematical operation in which the accuracy is limited to least accurate term is :

  1. addition

  2. subtraction

  3. multiplication and division

  4. both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In addition or subtraction we can reduce the terms to least accurate term and add or subtract them. By this process in addition or subtraction answer is not much get affected or change in answer is negligible.

But if we apply this process in multiplication and division, change in answer is considerable.
Hence in addition and subtraction accuracy is limited to least accurate term.

Multiple choice physics universe and space science xx radio telescope and space telescopes launching vehicles optical instruments : telescope

Which of the following is not a fact about Hubble Telescope?

  1. The Hubble Space Telescopes captures and transmits colorful images of objects in space such as dying stars and other galaxies.

  2. Although the Hubble Space Telescope can observe many things in space, it cannot observe the Sun or Mercury.

  3. The Hubble Space Telescope orbits about 353 miles above Earth

  4. None of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

All the facts mentioned about Hubble Telescope are true. The Hubble Telescope orbits 353 miles above earth and transmits colorful images of objects in space and through Hubble telescope we can observe many things in space except the sun or mercury.

Multiple choice physics universe and space science xx radio telescope and space telescopes launching vehicles optical instruments : telescope

Which of the following is not a part of HST?

  1. Advanced Camera for Surveys (ACS).

  2. Faint Object Camera (FOC)

  3. Computer-controlled polishing machines

  4. Faint Object Spectrograph (FOS).
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Computer-controlled polishiing machines is not a part of HST. This is used mostly in fabrication purposes. In fabrication process automation techniques like computer-controlled polishing is used to achieve high level of fabrication.

Multiple choice physics universe and space science xx radio telescope and space telescopes launching vehicles optical instruments : telescope

DSN is a deep space network tracking station is 

  1. to track and communicate with interplanetary spacecraft missions.

  2. to track and provide the fuel to the spacecraft.

  3. to maintain the spacecraft

  4. none of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

DNS is a deep space network tracking station use to track and  communicate with interplanetary spacecraft missions, Along with tacking and communication DSN is also used to explore the furthest point of our solar system.

Multiple choice physics universe and space science xx radio telescope and space telescopes launching vehicles optical instruments : telescope

Which of the following is an early drawback of HST?

  1. Its ground control system.

  2. Hubble failed to achieve a final sharp focus and the best image quality obtained was drastically lower.

  3. Images of point sources spread out over a radius of more than one arcsecond.

  4. All of the above
Reveal answer Fill a bubble to check yourself
B,C Correct answer
Explanation

As the early drawback of Hubble space telescope, Hubble filed to achieve a final sharp focus and the best image quality obtained was drastically lower. Also the image of point sources spread out over a radius of more than one arc second.

Multiple choice physics universe and space science xx radio telescope and space telescopes launching vehicles optical instruments : telescope

Which of the following is correct statement regarding HST?

  1. The Hubble Space Telescope (HST) , has accurately determined the rate of expansion of the universe.

  2. Hubble has contributed to studies of the behavior of graphite composite structures in vacuum.

  3. Optical contamination from residual gas can also be observed from the HST.

  4. none of the above
Reveal answer Fill a bubble to check yourself
A,B,C Correct answer
Explanation

The hubble space Telescope (HST) has accurately determined rate of expansion of the universe. It has contributed to studies of the behaviour of graphite composite structures in vacuum and has observed the optical contamination from residual gases.

Multiple choice physics universe and space science xx radio telescope and space telescopes launching vehicles optical instruments : telescope

The Hubble Space Telescope is scheduled to retire in which of the following year?

  1. 2012

  2. 2013

  3. 2014

  4. 2015
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The Hubble space telescope was launched in 1990 to observe stellar objects It has gathered spectacular images and has helped advanced knowledge in the field of cosmology. After it immense contribution it retired in the year 2014.