Answer:
P= 1.04651 g/cm3
Explanation:
What happens first when a star begins to run out of fuel?
The star’s core shrinks.
The star becomes a black hole.
The star becomes a white dwarf.
The star’s outer layer drifts away.
The star’s core shrinks, this happens first when a star begins to run out of fuel. Hence option A is correct.
What is star ?A star is a type of celestial object that consists of a bright spheroid of plasma kept together by self-gravity. The Sun is the closest star to Earth. Many other stars can be seen with the open eye at night, but due to their great distances from Earth, they appear as fixed points of light. Many of the brightest stars have proper names, and the most prominent stars have been classified into constellations and asterisms. Astronomers have put together star catalogues that identify known stars and offer conventional stellar designations. An estimated 1022 to 1024 stars exist in the visible cosmos. Only about 4,000 of these stars can be seen with the open eye, and they are all located within the Milky Way galaxy.
Hence option A is correct.
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A car is traveling at 21m/s. It accelerates at 1.4m/s2 for 11s. How fast is the car moving after the acceleration?
Answer:
v=u+at
v=21+1.4(11)
v=21+15.4
v=36.4
A liquid of low viscosity _____.
flows quickly
has a definite shape
flows slowly
fills its container
Answer:
flows quickly
why is it possible for iron ships to float o water,but needles sink when dropped in water
Explanation:
Needles sinks in water due to the more density of needles than the density of water. But ship is made hollow and contains air. So it's average density Is less than that of water. It displaces the liquid of it's own weight causing the ship to float on water.
So, it it possible for iron ships to float on water,but needles sink when dropped in water.
Hope it will help :)❤
What happens to an object's mass as the object's acceleration increases but the force stays the same
Question 2 options:
°The mass increases
°The mass is zero
°The mass decreases
°The mass stays the same
⊃°ω°⊃
Answer:
the mass stays the same
Explanation:
the more mass the faster
Answer:
The mass stays the same
Explanation:
i had this question and got it right
A bus is moving with an acceleration of 4 m/s^2. If it was initially at rest,
what will be its speed at the end of 2 seconds? *
a) 8 m/s
b) 6 m/s
c) 2 m/s
d) 0.5 m/s
A spring with a spring constant of 50 N/m is displaced by a force of 40 N. What is the displacement of the spring? (Fₛ = k Δx)
Answer:
The spring stretches or compresses 0.8 m (80 cm)
Explanation:
Hooke's Law
The force (F) needed to stretch or compress a spring by some distance Δx is given by
[tex]F=-k\Delta x[/tex]
Where k is a constant factor characteristic of the spring.
We are given the constant of a spring k=50 N/m and it's required to calculate the displacement Δx produced by a force of F=40 N. Solving for Δx:
[tex]\displaystyle \Delta x=\frac{F}{k}[/tex]
[tex]\displaystyle \Delta x=\frac{40}{50}[/tex]
Calculating:
[tex]\displaystyle \Delta x=0.8\ m[/tex]
The spring stretches or compresses 0.8 m (80 cm)
Please answer correctly cause I am not really sure..
Is this statement true or false?
There are SEVEN days between a NEW MOON and a FIRST QUARTER MOON.
The full cycle of moon phases averages 29.531 days. A quarter of that is 7.38 days. So "7 days" is a pretty good approximation for casual conversation. It's true.
Answer:True
Explanation:
The full cycle of the moon is 29.631 or we could say 29.5 and the quarter is 7.34 I think so yes it’s true it’s appropriately a full average and if you subtract this two it true
how does the use of fertilizer affect the nitrogen cyle
Answer:
The nitrogen cycle is a natural process that adds nitrogen to the soil. However, the use of fertilizers has increased the amount of usable nitrogen in the soil. The extra nitrogen seems appealing from the agricultural viewpoint that more nutrients in the soil means higher yield crops...
thanks ❤hi = L(1 – cos theta), theta = 40
Answer:A pendulum consists of a ball at the end of a massless string of length 1.4 m. The ball is released from rest with the string making an angle of 20 degrees with the vertical. What is the maximum speed of the pendulum?
Explanation: Have a great day and oh here is a little something to warn the great people. In the comments....
;)
Why cloth and leather are used to make safety clothing for people who work with heat. A.they are both good sources of heat. B they both can produce electrical energy C they both can absorb light energy. D they are both poor conductors of heat
Answer:
D
Explanation:
they are both poor conductors of heat so that people who works with heat won't get affected by heat
Which of the following is an interaction in which one organism benefits and the other is harmed (+/-)?
parasitism
mutualism
competition
commensalism
please help me
Answer:
Commensalism
Explanation:
Trust Me
The symbiotic relationship in which one organism benefits and the other is harmed (+/-) is called parasitism. For example, infectious microbes living in our body.
What is parasitism ?The long term relationship between two different kind of living organism is called symbiosis. There are different types symbiotic relations namely, mutualism, commensalism, parasitism etc.
The interaction in which both organism gets helped by each other is called mutualism. For example, fid fruit and flies. If only one organism is helped by the interaction and the other is not affected is called commensalism.
symbiotic relationship in which one organism benefits and the other is harmed (+/-) is called parasitism. The organisms which make threat to the other by this interaction are called parasites.
Find more on symbiosis:
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Complete the following table.
Answer:
Prats of the bicycle are a seat and tires
Simple Machines are brakes and a handler
HELP PLEASE!! 15 points awarded!
Element A combines with element B to make molecule AB(little 2). If the relative atomic mass of A is 10 and the relative atomic mass of B is 20. What mass of B will combine with 4g of A?
Answer:
its b
Explanation:
cause im in 7th grade ive been asked the same question
For what reason Do meteorogists use isobars on a weather map
Answer:
Isobars are similar to height lines on a geographical map, and they are drawn so that they can never cross each other. Meteorologists use isobars on weather maps to depict atmospheric pressure changes over an area and to make predictions concerning wind flow.
Explanation:
Answer:Isobars are similar to height lines on a geographical map, and they are drawn so that they can never cross each other.
Explanation:
which is the best insulator? metal, glass, plastic, or Styrofoam?
Answer:
Styrofoam would be the best insulator because it traps the air in small pockets, blocking the flow of heat energy.
Explanation:
A 55.0 kg person, having a density of
1010 kg/m3, is underwater. What is the
buoyant force acting on the person?
[?]N
Pwater = 1,000 kg/m3
Answer:
534.7
Explanation:
55/1010 = 0.0545m^3
1000(0.0545)(9.81) = 534.7 N (kept at 4 sig figs)
Help me with this question please
Answer:
Its true i'm pretty sure
Explanation:
Answer:
The answer is True
Explanation:
because it is and I suck at explaining
Shawn uses 45 N of force to stop the cart 27 meter from running his foot over. How much work does he do?
Answer:
W=f×d
w=45×27
w=1215 j.............
If the captain of a ship observes that the star Polaris is 15° above the horizon, what is this ship's latitude?
A. 75° north
B. 15° north
C. 30° north
D. Unable to determine based on the information given
Which competition is the “ most important soccer competition in the world “ ?
a - National championship
b - World Cup
c - olympics
A beam of light of wavelength lambda = 541nm is normally incident on a diffraction grating which has 600 lines m * m ^ - 1 Determine the angle theta 2 at which the second order diffracted beam is seen.
Answer:
Angle of diffraction for second order maxima is θ = 18.941°
Explanation:
From the question it is given that
wavelength of incident light = λ = 541 nm = 541 x [tex]10^-^9 m[/tex]
order of maxima = n =2
diffraction grating has 600 lines per mm
⇒ distance between two slit is [tex]\frac{1mm}{600}[/tex] = 1.66 x [tex]10^-^6[/tex] m
using the relation of Braggs diffraction formula i.e.,
2dsinθ = nλ ..................................(1)
where, d = distance between two lines of grating
θ is the angle of diffraction
n= order of maxima
λ is the intensity of incident photon
on substituting the respected values in relation (1) we get,
2 x 1.66 x [tex]10^-^6[/tex]m sinθ = 2 x 541 x [tex]10^-^9 m[/tex]
⇒ sinθ = 0.3246
⇒ θ = [tex]sin^-^1(0.3246)[/tex] = 18.941 °
A hot drink in a room is at a temperature of 20 C
What has happened to the drink after 10 minutes?
Answer: the drink cooled down to the same temperature as the room it was in.
Explanation: due to the change and temperature of the room, it cause the heat particles to exchange, causing it cool
Fill in the blank for the following statement: Physical weathering is the ________.
Answer:
Breakdown of rocks
Hope this helps :)
Answer:
Disintegration of rocks without chemical change.
Explain why a trapped gas in black box left in the sun will reach a higher temperature than the surroundings
Answer:
because the gas within the black box will absorb more heat than that in the surrounding
Explanation:
this is because the black color has a tendency of absorbing heat
If a roller coaster has 50,000 J of potential energy at the top of the first hill, how much kinetic energy does it have at the lowest point?
Answer:
50,000 J because of the transformation of energy
Explanation:
Light waves are:
O Transverse waves
O Longitudinal Waves
Answer:
They are Transverse Waves.
Answer: Transverse waves
Jin is standing still and watching an archer on a horse traveling away from a target. The archer is moving at a speed of 4 m/s and shoots the arrow toward the target with a speed of 17 m/s. Which statement is supported by this scenario?
-For Jin, the speed of the arrow is 21 m/s, and for the archer, the speed of the arrow is 4 m/s.
-For Jin, the speed of the arrow is 13 m/s, and for the archer, the speed of the arrow is 17 m/s.
-For both Jin and the archer, the speed of the arrow is 21 m/s.
-For both Jin and the archer, the speed of the arrow is 17 m/s.
Answer:
For Jin, the speed of the arrow is 13 m/s, and for the archer, the speed of the arrow is 17 m/s.
Explanation:
EDGE2020 :)
B
Answer:
B.
Explanation:
Edge 2021
How long would it take a 400 W motor to transfer 2000 J of energy
5s
50s
0.2s
0.02s
Answer:
it's answer is 5 seconds,
Explanation:
Given
Power (p) = 400 watt
work (w) = 2000 J
time taken (t) = ?
we know that,
p = w/t
400 = 2000 / t
t = 2000/400
Therefore t = 5 sec
help i need an explanation
Answer:
125.44 N
Explanation:
From the question given above, the following data were obtained:
Weight on earth = 784 N
Acceleration due to gravity of the moon (gₘ) = 1.6 m/s²
Weight on moon =?
Next, we shall determine the mass of the person. This can be obtained as follow:
Weight on earth (Wₑ) = 784 N
Acceleration due to gravity of earth (gₑ) = 10 m/s²
Mass (m) =?
Wₑ = m × gₑ
784 = mass × 10
Divide both side by 10
Mass = 784 / 10
Mass = 78.4 Kg
Finally, we shall determine the weight of the person on moon. This can be obtained as follow:
Mass (m) = constant = 78.4 Kg
Acceleration due to gravity of the moon (gₘ) = 1.6 m/s²
Weight on moon (Wₘ) =?
Wₘ = m × gₘ
Wₘ = 78.4 × 1.6
Wₘ = 125.44 N
Therefore, the weight of the person on moon is 125.44 N.