Answer:
We may have people making habitats on asteroids ... I know that humans will colonize the solar system and one day go beyond. Richard Gott has estimated that the human race could survive for another 7.8 million years, but it is not likely to ever colonize other planets.
To be sure there are many daunting challenges facing prospective space colonists such as protection from exposure to deadly radiation levels, the impact on the human body while living and working in cramped, low-gravity environments for extended periods of time and the psychological toll of isolation and confinement.
According to me we can't colonize other planets which is against humanity
29. Convert 2.922 x 10-14 to a standard number.
Since the exponent is negative, move the decimal point to the left (backward).
0.000 000 000 000 029 22
lab report of current resistance and omhs law
Answer:
ya
Explanation:
Questions: 1. Do these resistors satisfy Ohm ’ s law? Explain your answer. — All resistors satisfy Ohm's law unless the current through the resistor is more than the ca-pacity of the resistor which might lead to meltdown of the material due to heating.2. Is an ammeter connected in series or parallel with a circuit component? Explain. — An ammeter must always connect in series. As the ammeter measures current in a circuit/loop it must be connected along with a circuit element.3. Is a voltmeter connected in series or parallel with a circuit component? Explain. — A Voltmeter measure voltage across a circuit element, hence it must be connected paral-lel to the element that we have to measure voltage.
Pls help me 10 points
Answer:
d is the right answer
it's was helpful to you
A-2.0m/s
B-0.2m/s
C-1.4m/s
D-0.5m/s
Answer:
D. 0.5 m/s
Explanation:
From C to D:
displacement, d is (8 - 7) = 1 m
time, t is (7 - 5) = 2 s
[tex]velocity = \frac{displacement}{time} \\ \\ velocity = \frac{1}{2} \\ \\ velocity = 0.5 \: m {s}^{ - 1} [/tex]
A lad, waiting for his friend walks in the sidewalk, in front of her house, from the front door, first, he moves towards the Positive x-axis, 5 m, then goes back, 6 m. What is his total displacement from his original position? Displacement is a vector quantity whilst, distance is a scalar quantity.
His total displacement from his original position is -1 m
We know that total displacement of an object from a position x to a position x', d = final position - initial position.
d = x' - x
If we assume the lad's initial position in front of her house is x = 0 m. The lad then moves towards the positive x-axis, 5 m. He then ends up at x' = 5 m. He then finally goes back 6 m.
Since displacement = final position - initial position, and his displacement is d' = -6 m (since he moves in the negative x - direction or moves back) from his initial position of x' = 5 m.
His final position, x" after moving back 6 m is gotten from
x" - x' = -6 m
x" = -6 + x'
x" = -6 + 5
x" = -1 m
Thus, his total displacement from his original position is
d = final position - initial position
d = x" - x
d = -1 m - 0 m
d = -1 m
So, his total displacement from his original position is -1 m
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An oil tanker has a mass of 400,000 tonnes. It is 500m long and 40m wide.
A.What is the minimum depth of the harbor it requires.?
B. Calculate the downward force
C. State the upward force
D. Draw a diagram to show the forces acting on the tanker.
Archimedes' principle allows us to solve this problem, find:
a) the submerged part h = 2.04 m
b) the downward force W = 3.9 10⁹ N
c) the upward force B = 4 10⁸ N
d) The free-body diagram attach
The parameters given
* The tanker mass with oil M = 400000 Tonnes (10³ kg/1 tonn) = 4 10⁸ kg
* The length and width of the tanker l = 500m and w= 40m
To find
* the submerged part of the tanker
* The force in the tanker
* free body diagram
Fluid mechanics exercises, the Archimedes' principle says that the hydrostatic thrust of a fluidIn on a body is equal to the weight of the desalted liquid.
B = [tex]\rho \ g \ V_{body}[/tex]
Where ρ is the density of the fluid in this case water (ρ = 1000 kg /m³), g is the acceleration of gravity (g = 9.80 m / s²) and V_{body} is the volume of the tanker.
a) In the attached diagram we can see the forces involved, we apply the equilibrium equation
B - W = 0
The volume of the submerged tanker is
V_{body} = l w h
Where l and w are the length and width of the tanker and h is the submerged quantity
We substitute
ρ g (l w h) = W
[tex]h = \frac{W}{\rho \ g\ l \ w}[/tex]
We calculate
h = 4 10⁸ / (10³ 9.8 500 40)
h = 2.04 m
The submerged quantity of tanker using Archimedes' principle is
h = 2.04m
b) The downward force on the tanker's weight
W = m g
W = 4 10⁸ 9.80
W = 3.9 10⁹ N
c) the upward force is the thrust
B = ρ g
B = 1000 9.8 (500 40 2.04)
B = 4 10⁸ N
d) in the attachment we can see a free body diagram with the two forces on the tanker: the weight down and the fluid push up
Archimedes' principle allows finding the submerged part of the tanker
h = 2.04 m
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g A high-energy photon turns into and electron and a positron. (A positron has exactly the same mass as the electron, but opposite charge.) What is the longest wavelength that the photon can have for this process to occur
Answer:
2 m = E / c^2 where m is mass of electron
E = h v where v is the frequency ( nu) of the incident photon
E = h c / y where y is the incident wavelength (lambda)
2 m = h / (c y)
y = h / (2 m c) wavelength required
y = 6.62 * 10E-34 / (2 * 9.1 * 10E-31 * 3 * 10E8) m
y = 3.31 / 27.3 E-11 m
y = 1.21 E -12 m = .0121 Angstrom units
Describe the principle, construction and working of Hydraulic brakes.
Answer:
E= mc^2
Explanation:
I don't know.Err.. why don't you ask another person
two car moving in the same direction have speed of 100km/h-1 and 130km/h.what is the resultant of velocity .shoe carnival in the same direction having speed of 100 km per hour - 1 and 130 km per hour to kilometre-per-hour - 1
Answer:
jjjjjjhshahshhddhdhh
what is displacement?
Explanation:
displacement is a vector quantity that refers how far out of place an object.
7. what do the key results indicate?
The key results indicate that lightning contains electricity.
Suppose we are told that the position of an object (x) moving with an acceleration a is proportional to some power of a, say an and some power of t, say tm. Determine the values of n and m and write the simplest form of an equation for the position.
(a) The value of n is 1 and the value of m is 2
(b) The simplest form of an equation for the position is [tex]at^2[/tex]
The given expression:
[tex]x = a^nt^m[/tex]
To find:
the values of a values of n and msimplest form of the equationThe values of n and m will be calculated using the dimensions of accelerations, position and time.
The dimension of acceleration, [tex]a = LT^{-2}[/tex]The dimension of position, x = LThe dimension of time, t = T(a) the values of n and m are calculated as follows:
[tex]x = a^n t^m\\\\ L = [LT^{-2}]^n [T]^m\\\\L = [L]^n [T^{-2n}][T]^m\\\\L = [L]^n[T^{m-2n}]\\\\L^1T^0 = [L]^n[T^{m-2n}]\\\\L^1 = L^n\\\\n = 1\\\\T^0 = T^{m-2n}\\\\0 = m - 2n\\\\0 = m- 2(1)\\\\0 = m- 2\\\\m = 2[/tex]
(b) The simplest form of an equation for the position can be written as;
[tex]x = a^n t^m\\\\x = a^1 t^2\\\\x = at^2[/tex]
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In the construction of a bridge kinetic energy was used and now has what kind of energy?Solar Energy, Gravitational Potential Energy, Mechanical Energy, Thermal Energy
Answer:
potential energy
Explanation:
Based on energy transformation
The boiling point of lauric acid is 298.9°C. Its melting point is 43.2°C. At room temperature (~25°C), lauric acid is in which state?
A. solid
B. intermediate between solid and liquid
C. liquid
D. intermediate between liquid and gas
Answer
A. solid
Explanation
We have that At room temperature (~25°C), lauric acid is in a
Solid state
Option A
From the question we are told that
The boiling point of lauric acid is 298.9°C. Its melting point is 43.2°C.
It is important to note that Room temperature is is at 25C
Generally
if lauric acid 298.9°C and melting point is 43.2°C
Therefore at room temperature low than Boiling and melting point lauric acid is
Solid
in conclusion
At room temperature (~25°C), lauric acid is in a Solid state
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wite a paragraph explaining the difference between things that have matter and things that don't have matter.
Answer: Matter is how much space or opacity an object takes up. In short anything that take up space. Things like balls, trees, and even people are all made of matter. Mass is how much matter a object has. Air also has mass also, even though we can't see it. Things like cars, buildings, even planets have mass.
Explanation: Paragraphs are sometimes 4-6 sentences.
If the mass of an object is 5 kg and the velocity is 8 m/s, what is the momentum?
Answer:
40 kg•m/s
Explanation:
momentum (p) = mass (kg) × velocity (m/s)
In which version does George utilize some of the steps of Effective Conflict Management?
Answer:
The Effective Cooperative Conflict management consists of a series of steps to take when two or more people have a clash or opposing interests that in some way get in the way of the action of the other. These steps consist of the following:
1) manage emotions,
2) manage feedback
3) manage a goal.
A ball is rotating on a circle of radius 0.500m at a constant ratr of 200 rev/min.Find the speed and acceleration of the ball.
Answer:
Solution
verified
Verified by Toppr
The radius of the tire is r=0.500m. The speed of the stone on its outer edge is
v
t
=
T
2πr
=
(60.0s/200rev)
2π(0.500m)
=10.5m/s
and its acceleration is
a=
R
v
2
=
0.500m
(10.5m/s)
2
=219m/s
2
inward.
Explanation:
How far will a bus travel if it averages a speed of 65 km/h for 7 hours?
What are you solving for?
What’s the equation?
Show work!
distance= speed*time
distance=65*7=455km
Velocity problem 3: How far away can you run away from a lion if you travel at 3 m/s west and
you have only 15 seconds?
Answer Explanation:
d = vt
You will be 3(15) = 45 m west of where you began.
As we do not know where the lion is to begin with, it's hard to say where we will end up relative to it.
Will we ever be able to know if there are other universes like our own? what do you think,
some say it is impossible to see beyond our own universe. but hey, we used to think that the earth was flat and look at us now, planing to go to mars.
however, it is impossible to know what kind of advancements lie ahead for science.
Answer:
I think it's possible to know if more universes exist like how we found out that more galaxies exist.
A sound that is perceived as twice as loud requires
Select one:
O a. four times the intensity,
O b. twice the intensity.
C
ten times the intensity
d. one hundred times the intensity.
Answer:
C.ten times the intensity.
Why did Thomson observe two glowing dots when he put neon gas into a
cathode-ray tube?
Answer:
Electrons accelerated to high velocities travel in straight lines through an empty cathode ray tube and strike the glass wall of the tube, causing excited atoms to fluoresce or glow.
automotive technology
lol what is this question
the current through a 50ohm's resistance is 2A , how much power is dissipated as heat.
Answer:
Power is 5000 W
Explanation:
[tex]{ \bf{P=I {}^{2} R}}[/tex]
P is power
I is current
R is resistance
[tex]P=50 {}^{2} \times 2 \\ P=5000{}^{} \: watts[/tex]
Prove that s=ut+½at²
Explanation:
Distance travelled = Area under the line
= ut + ½ (v-u)t
Acceleration (a) = (v-u)/t and so (v-u) = at
Therefore,
Distance travelled (s) = ut + ½ (v-u)t = ut + ½ (at)t = ut + ½ at²
Thus,proved.
vận tốc là 12km|h tgian 2h hỏi quãng đường
Which of the following statements is correct?
A) For a farsighted person, the near point is always located farther than 25 cm from the eye and the corrective lens is converging
B) For a farsighted person, the near point is always located farther than 1 m from the eye and the corrective lens is diverging U
C) For a nearsighted person, the near point is always located closer than infinity from the eye and the corrective lens is converging, U
D ) For a nearsighted person, the near point is always located closer than 25 cm from the eye and the corrective lens is diverging
Answer:
b
Explanation:
sorry if i got it wrong
An amusement park designer wants his swing to have a centripetal acceleration of 24 m/s2. If the velocity of the swing is 11 m/s, how long should the chain on the swing be?
A. 6.5 m
B. 5.5 m
C. 5.0 m
D. 6.0 m
Answer:
radius is C: 5.0 m
Explanation:
formular for centripetal acceleration:
[tex]a = \frac{ {V}^{2} }{r} [/tex]
a is acceleration
V is velocity
r is radius
[tex]24 = \frac{ {11}^{2} }{r} \\ \\ r = \frac{ {11}^{2} }{24} \\ \\ r = 5.0 \: m[/tex]
This length is approximate.
==========================================================
Explanation:
The centripetal acceleration formula we use is
a = (v^2)/r
where v is the linear velocity and r is the radius. The swing moves in a circular path, so the chain acts as the radius. If we can find the radius, then we have found the chain length. The goal is to find r when a = 24 and v = 11
So we have...
a = (v^2)/r
24 = (11^2)/r
24 = 121/r
24r = 121
r = 121/24
r = 5.041667 approximately
r = 5.0 meters when rounding to the nearest tenth
The chain should be approximately 5.0 meters.
What happens if you go through a black hole ?
Explanation:
The intense gravity of the black hole would pull you apart, separating your bones and muscles.