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Vlada [557]
4 years ago
7

ANSWER TRUE OR FALSE FOR EACH OF THESE.

Physics
2 answers:
Vikentia [17]4 years ago
8 0

Answer:

1. True -- Forms of life has been discovered on Mars.

2. True -- It has a unique configuration because its axis of rotation is tilted sideways. Its north and south poles, therefore, lie where most other planets have their equators.

3. False -- Neptune and Pluto were both predicted before discovery, however, Pluto was some degrees away from the predicted location.

4. True -- Saturn has 4 groups of rings, Neptune has 5 rings and Uranus has 2 sets of rings.

5. True -- It takes 248 Earth years for Pluto to complete one orbit around the Sun.

6. True -- Neptune was correctly predicted.

7. True -- The atmosphere is very thin and contains about 95.3% carbon dioxide and 2.7% nitrogen.

8. True -- Venus has its surface covered thick clouds which contains craters, volcanoes, mountains, and big lava plains.

9. False -- Pluto's orbit around the Sun is very elliptical, as such there are times when it crosses Neptune's orbit and becomes closer to the Sun than Neptune.

10. True.

11. True -- Asteroids are made elements and particles which are considered to be remains of planets which did not fully form.

12. True -- Astronomers think comets are leftovers from the material that initially formed the solar system about 4.6 billion years ago.

13. True -- Astronomers believe comets are leftovers from the material that initially formed the solar system.

14. True -- Comets contain dust, ice, carbon dioxide, ammonia, methane which are in frozen states.

15. False -- Tidal forces from Earth have slowed down the Moon's rotation to the point where the same side is always facing the Earth as such, all of the moon's surface cannot be seen.

16. True -- The moon keeps the same face pointing towards the Earth because its rate of spin is tidally locked so that it is synchronized with its rate of revolution (the time needed to complete one orbit). In other words, the moon rotates exactly once every time it circles the Earth.

17. True.

18. False -- A new moon is not seen in the sky at night! It rises with the sun and sets with the sun.

19. False -- The height of the ocean's tidal bulges is controlled by the moon's gravitational force and the Earth's gravity pulling the water back toward the Earth. (Moon and Earth, not the sun).

20. True.

21. Question does not specify what quarter, however -- Neap tides occur during the first and third quarter moon.

22. True.

23. True -- Refracting telescopes have a large glass lens at the front, then a long tube (body), then an eyepiece or instrumentation at the rear.

24. True -- There are two mirrored surfaces inside a reflecting telescope and they are used to collect the image (light) and reflect it into the eyepiece

Anestetic [448]4 years ago
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Zanzabum

Answer:

Ionic bond

Explanation:

Hope it helps ya

8 0
3 years ago
How much work (MJ) must a car produce to drive 125 miles if an average force of 306 N must be maintained to overcome friction?
baherus [9]

Answer:

The right solution is "61.557 MJ". A further explanation is given below.

Explanation:

The given values are:

Force,

F = 306 N

Drive,

D = 125 miles,

i.e.,

  = 201168

meters

As we know,

The work done will be:

= F\times S

On substituting the given values, we get

= 306\times 201168

= 61557408 \ J

On converting it in "MJ", we get

= 61.557\times 10^6 \ J

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6 0
3 years ago
A toy car is given a quick push so that it moves up an inclined ramp. After it is released, it moves up, reaches its highest poi
Alexeev081 [22]

Answer:

7. Net constant force down the ramp

Explanation:

After the car is released and starts moving up the ramp, the only force that is applied on the car is weight because of the gravity, we were told that the friction force is neglected. the force because of the weight is given by:

F=m*g*sin(\theta)

where θ is the angle of the ramp.

as you can see those values won't change, so the force remains constant down the ramp.

4 0
3 years ago
You take a lab battery and, when it isn't connected to a circuit, you measure a voltage of 4.00-V with a voltmeter. You then con
max2010maxim [7]

Answer:

r = 28.6 ohm

Explanation:

As we know that when battery is in open circuit then the potential difference of the cell is known as EMF

so EMF is given as

EMF = 4.00 V

now when the battery is connected across a resistance of 200 ohm then there is current flowing through the battery

it is given as

i = \frac{V}{R + r}

17.5 \times 10^{-3} = \frac{4}{200 + r}

200 + r = 228.6

r = 28.6 ohm

6 0
4 years ago
Forces holding particles together are strongest in a
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The answer may be pair or group
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