1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
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
5 0
1.t
2.f
3.f
4.t
5.t
6.t
7.f
8.f
9.t
10.t
11.f
12.t
13.t
14.f
15.t
16.f
17.t
18.t
19.f
20.t
21.f
22.t
23.f
24t
You might be interested in
Is the second largest planet, with an atmosphere of mainly hydrogen and helium, and rings of ice and rock particles
BartSMP [9]
The answer is Saturn. 


6 0
4 years ago
Read 2 more answers
A 0.20 kg mass (m1) hangs vertically from a spring and an elongation of the spring of 9.50 cm (r1) is recorded. With a mass (m2)
kupik [55]

Answer:

k=320N/m

Explanation:

Step one:

given data

Let the initial/equilibrum position be x

mass m1= 0.2kg

F1= 0.2*10= 2N

elongation e= 9.5cm= 0.095m

mass m2=1kg

F2=1*10= 10N

elongation e= 12cm= 0.12m

Step two:

From Hooke's law, which states that provided the elastic limits of a material is not exceeded the extention e is proportional to applied Force F

F=ke

2=k(0.095-a)

2=0.095k-ka----------1

10=k(0.12-a)

10=0.12k-ka----------2

solving equation 1 and 2 simultaneously

 

   10=0.12k-ka----------2

-   2=0.095k-ka----------1

   8=0.025k-0

divide both side by 0.025

k=8/0.025

k=320N/m

5 0
3 years ago
A 81 kg man is riding on a 40 kg cart traveling at a speed of 2.3 m/s. He jumps off with zero horizontal speed relative to the g
Alexus [3.1K]

Answer:

\Delta v= 4.66\frac{m}{s}

Explanation:

In this case we have to use the Principle of conservation of Momentum:

<em>This principle says that in a system  the total momentum is constant if no external forces act in the system. The formula is:</em>

m_1v_1+m_2v_2=m_1u_1+m_2u_2

<em>Where:</em>

m_1: Mass of the first object.

m_2: Mass of the second object.

v_1: Initial velocity of the first object.

v_2: Initial velocity of the second object.

u_1: Final velocity of the first object.

u_2: Final velocity of the second object.

In <u>this problem</u> we have:

m_1=81kg\\m_2=40kg\\v_1_2=2.3\frac{m}{s}

u_1=0\frac{m}{s}

Observation: v_1_2: Is because the system has the same initial velocity.

First we have to find u_2,

m_1v_1+m_2v_2=m_1u_1+m_2u_2

We can rewrite it as:

(m_1+m_2)v_1_2=m_1u_1+m_2u_2

Replacing with the data:

(m_1+m_2)v_1_2=m_1u_1+m_2u_2\\\\(81kg+40kg)2.3\frac{m}{s}=81kg(0\frac{m}{s})+40kg(u_2)\\\\(121kg)2.3\frac{m}{s}=40kg(u_2)\\\\\frac{(121kg)2.3\frac{m}{s}}{40kg}=u_2\\\\\frac{278.3}{40}\frac{m}{s}=u_2\\\\6.96\frac{m}{s}=u_2

We found the final velocity of the cart, but the problem asks for the resulting change in the cart speed, this means:

\Delta v=u_2-v_2\\\Delta v=6.96\frac{m}{s}-2.3\frac{m}{s}\\\Delta v= 4.66\frac{m}{s}

Then, the resulting change in the cart speed is:

\Delta v= 4.66\frac{m}{s}

5 0
3 years ago
When a battery, a resistor, a switch, and an inductor form a circuit and the switch is closed, the inductor acts to oppose the c
GaryK [48]

Answer:

The time constant becomes twice.

Explanation:

T = Time constant of the L-R circuit

L = Inductance of the inductor

R = Resistance of the resistor

Time constant of the L-R circuit is given as

T = \frac{L}{R}\\

T_{1} = initial time constant of the L-R circuit = T

T_{2} = final time constant of the L-R circuit

L_{1} = Initial inductance of the inductor =  L

L_{2} = Initial inductance of the inductor =  2L

For the same resistance, the time constant depend directly on the inductance, hence

\frac{T_{1}}{T_{2}} = \frac{L_{1}}{L_{2}}\\\frac{T}{T_{2}} = \frac{L}{2L}\\\frac{T}{T_{2}} = \frac{1}{2}\\T_{2} = 2T

7 0
4 years ago
Please help me I will give you 20 points !!
nadezda [96]

Answer:

D. The primary source, because it was written by the researcher

Explanation:

One should learn to trust the primary source more because it is the real work of the researcher.

A primary work defines the work of research from his or her experimental findings.

  • The primary source presents experimental data and other subordinates ones to reach a conclusion as seen from the view of the researcher.
  • A secondary source implies someone else documenting their own opinion about the primary experimental set up.
  • This can get dicey in the sense that results can be twisted to serve other ulterior motives.

8 0
3 years ago
Other questions:
  • If you drop a gum rapper on the floor is that pollution
    10·2 answers
  • The light of that star actually gives off
    15·2 answers
  • Which chart places the elements of plot in the correct order?
    7·2 answers
  • There was a groundbreaking court decision in 1783 in massachusetts regarding an escaped slave named ___________ frederick dougla
    13·1 answer
  • The coefficient of static friction between a block and a horizontal floor is 0.4500, while the coefficient of kinetic friction i
    11·1 answer
  • With what force will a car hit a tree if the car has a mass of 3,454 kg and it is accelerating at a rate of 5 m/s2?
    7·1 answer
  • Define the difference between the Newtonian mechanics and a Lagrangian mechanics
    9·1 answer
  • A tourist drops a penny off the Empire State Building. The penny hits the ground 12 seconds later. What is the velocity of the p
    13·1 answer
  • Time Dilation. A group of scientists discover a new, rare isotope and are able to store a small amount of it. They determine tha
    8·1 answer
  • PLS HELP. WILL GIVE BRAINLIEST. PLS THIS IS WORTH 35 POINTS ON MY TEST
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!