Answer:
Elliptical galaxies lack the atomic hydrogen gas that we use to determine orbital speeds at great distances from the centers of spiral galaxies.
Jessie and Jaime complete a 5.0 km race. Each has a mass of 68 kg. Jessie runs the race at 15 km/h; Jaime walks it at 5 km/h. How much metabolic energy does each use to complete the course
The total metabolic energy used by each to complete the course is determined as 656.91 J.
Kinetic energy of Jessie and JaimeThe kinetic energy of Jessie and Jaime is calculated as follows;
K.E = ¹/₂mv²
where;
m is mass of Jaimev is speed15 km/h = 4.17 m/s
5 km/h = 1.39 m/s
K.E = ¹/₂(68)(4.17)² + ¹/₂(68)(1.39)²
K.E = 656.91 J
Thus, the total metabolic energy used by each to complete the course is determined as 656.91 J.
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Pleaseeee helppp!! The picture is below with answer choices
Answer:
Desiree, did you really take a picture of your computer with your phone? :0 , print screen, (prt sc) and open paint, or the clip tool to paste pic into where you choose. no lines needed. It's harder to read the pictures when you take a phone picture. just screen capture, it's clean, and neat.
Explanation:
conduction is how quickly the temp equalize. A is the best conductor.
Please disregard. Didn't mean to post a question.
Oops.
That's my bad then.
As of 2022, what is the total population of the planet?.
Answer:
the total population of the planet is 248
The main illustration in the video shows the life track of a one-solar mass star. Each point along this track represents __________.
Each point along the track of one solar mass star represents the star's surface temperature and luminosity at one time.
What is the one-solar mass star?A star having a mass equal to the mass of the Sun is called a one-solar mass star.
Its life track shows the luminous intensity as well as the surface temperature.
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Which of the following is NOT one of the dialectical tensions that Baxter and Montgomery address in their theory of relational dialectics?
A) conventionality-uniqueness B) revelation-concealment C) inclusion-seclusion D) judgement-acceptance
Judgement-acceptance is NOT one of the dialectical tensions that Baxter and Montgomery address in their theory of relational dialectics.
What is the Baxter and Montgomery theory?The Baxter and Montgomery theory is a model used in psychology to describe different parts of dialectics.
The Baxter and Montgomery theory put special emphasis on the existence of different layers (dimensions) in dialectics.
The Baxter and Montgomery theory is used to treat dialectical tensions by selecting autonomy over interdependence.
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The sky is dark at night: Group of answer choices because the stars in the Milky Way are far away. because the Sun is on the other side of Earth. because there are far fewer stars on the night side of Earth. because all the light from all the objects in the unive
Answer:
Sun is on the other side
Explanation:
What is water scarcity?
Answer:
Water scarcity can mean scarcity in availability due to physical shortage, or scarcity in access due to the failure of institutions to ensure a regular supply or due to a lack of adequate infrastructure.
Explanation:
If it is brittle, dissolves easily in water, has a high melting point, and conducts electric current it is a(n) __________.
Answer:
Ionic Compound
Explanation:
We know that an ionic compound dissolves easily in water. Its melting point is very high, and it is a conductor.
The equation for Ionic Compound (IC) versus Electricity (EC) is
IC=1/2 divided by EC
EC is the base for the mathematics, so EC is a base warmth at 360.
360 divided by 1/2 is 180
That is the speed in which the current has.
Glad I could help!
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For further Reflection
# Do you find Legrain's arguments and examples compel.
ling? Could cultural exchanges such as those detailed in
Legrain's article be more complicated or problematic than
Legrain proposed? Consider how other cultural products-
perhaps those from Africa or Asia--might either uphold or
undermine Legrain's thesis on globalization
Source Philippe Legrain. "Cultural Globa ization
Answer:
Possible Answers:
How the points made can be more complicated or problematic:
The author seems to be focusing on pop culture or pastime activities.
The author isn’t taking into account economic differences between the average citizens of different nations.
All of these examples still follow the American idea of capitalism, not other economic systems.
Explanation:
pf
A laboratory experiment produces a single-slit diffraction pattern on a screen. If the slit is made narrower, the bright fringes will be:.
Answer:
fringes move farther
Explanation:
The relation between the distance between the fringes is given by
y = Dλ/d
where, D is the distance between the plane of slit and the screen
d is the width of slit, λ is the wavelength of light used.
As the slit made narrower, that means d decreases, the value of y increases, that means the fringes move farther.
If a star is 10 parsecs away, how long ago did the light we see from it tonight begins its journey toward us?
Answer:
32.6 years
Explanation:
A block is pushed against the spring with spring constant 15 kN/m (located on the lefthand side of the track) and compresses the spring a distance 5 cm from its equilibrium position (as shown in the figure below). The block starts at rest, is accelerated by the compressed spring, and slides across a frictionless track (as shown in the figure below). It leaves the track horizontally, flies through the air, and subsequently strikes the ground. The acceleration of gravity is 9.81 m/s
a) What is the speed v of the block when it
leaves the track?
Answer in units of m/s.
b) What is the horizontal distance x the block
travels in the air?
Answer in units of m
c) What is the total speed of the block when it
hits the ground?
Answer in units of m/s
Answer:
F = -K x = 15 kN/m " .05 m = .75 kN = 750 N
W = 1/2 K X^2 original potential energy of block
W = 1/2 * 15 Kn/m * .0025 m^2 = 18.75 J
One cannot calculate speed of block without knowing mass of block.
The composition of a star is determined from... Group of answer choices the amount of shift in the spectral lines in the spectrum. the pattern of spectral lines in its spectrum. the depth of spectral lines in the spectrum. the red or blue shift of spectral lines in a spectrum the width of the spectral lines in the spectrum
The composition of a star is determined from the red or blue shift of spectral lines in a spectrum, the width of the spectral lines in the spectrum.
What is spectroscopy ?The study of light and other radiation absorption and emission by matter is called spectroscopy. Electromagnetic radiation into its constituent wavelengths, in a spectrum, just like a prism splits light into a rainbow of colors.
The composition of a star is determined from the red or blue shift of spectral lines in a spectrum, the width of the spectral lines in the spectrum.
Hence, option D is correct.
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I have got a project about hacks so i need help
What Are hacks not computeer hacks like hack in real life
Hacks in real life are tricks to help solve a problem with a simple solution.
Say for example, add a pinch of salt to whip egg white faster.
Answer:
you mean life hack ?...
Explanation:
well life hack is a strategy adopted in order to manage one's time and daily activities in a more efficient way.
life hacks are intended to improve your life e.g setting an alarm clock in order to wake up on time or putting a stoking over the end of your vacuum cleaner to help you find a tiny item etc.
Hope this helps
How much energy must the shock absorbers of a 1200-kg car dissipate in order to damp a bounce that initially has a velocity of 0. 800 m/s at the equilibrium position
Answer:
384 joule
Explanation:
mass(m) = 1200 kg,velocity(v) = 0.800m/s, Kinetic Energy(KE) = ? We know that, KE = 1/2 m× v×v, = 1/2× 1200×0.800×0.800 = 600× 0.64 = 384 joule
The starting materials in a nuclear change have a total mass of 2.3465 × 10–27 kg. after the change, the resulting materials have a mass of 2.3148 × 10–27 kg. how much energy was released during the change? 2.85 × 10–12 j 2.08 × 10–10 j 2.11 × 10–10 j 8.56 × 10–4 j
The energy released during the nuclear change is 2.853*10^(-12) J.
What is Nuclear change?
A nuclear change -- involves changes in nuclear structure, such as fission (splitting) of a nucleus or an atom, or fusion (combining) of neutrons and protons to form heavier atoms
Given that,
Total mass
[tex]m=2.3465\times 10^{-27}\ kg[/tex]
After change , the mass of resulting materials
[tex]m'=2.3148\times 10^{-27}\ kg[/tex]
Using the Einstein's mass energy equation
[tex]E=mc^2[/tex]
The energy released during the change is given by
[tex]\Delta E=mc^2[/tex]
Where, [tex]\Delta m[/tex] is the change of mass in the process
c = speed of light
The change in mass
[tex]\Delta m=m-m'[/tex]
[tex]\Delta m=2.3465\times 10^{-27}-2.3148\times 10^{-27}[/tex]
[tex]\Delta m =0.0317\times 10^{-27}\ kg[/tex]
We substitute the value into the formula
[tex]\Delta E=0.0317\times 10^{-27}\times (3\times 10^8)^2[/tex]
[tex]\Delta E=2.853\ti,es 10^{-12}\ J[/tex]
Hence, The energy released during the change is 2.853*10^(-12) J.
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Answer:
A
Explanation:
a 10. kg ball thrown into the air. it is going 3.0 m/s when thrown. how much potential energy will it have at the top?
Answer:
45 j
Explanation:
At the top, the KE will have been converted to PE
KE = 1/2 mv^2 =PEat-top = 1/2 10 *3^9 = 45 j
Where must the moon be in its orbit for the full moon phase to be visible?.
Answer:
On the side of the Earth opposite from the sun
Explanation:
As our Moon continues its orbit counterclockwise around Earth (viewed from above the north pole), more and more of the illuminated part of the Moon becomes visible to us, until it reaches the “full Moon” stage. A full Moon occurs when the Moon has moved in its orbit so that Earth is “between” the Moon and the Sun.
Answer: the sun:
Explanation:
the moon reflects the light coming from the sun. hope this helps. Can I pls have brainllyistbrainllyistbrainllyistbrainllyist
Just a question anybody playing minècraft here?
Answer:
yes/nope
Explanation:
............... :)
Part 1- An ideal gas, initially at a volume of 1.71429 L and pressure of 7 kPa, undergoes isothermal expansion until its volume is 6 L and its pressure is 2 kPa. Calculate the work done by the gas during this process. Answer in units of J.
Part 2- Find the heat added to the gas during this process.
Answer in units of J.
Part 1- The work done by the gas during this process will be 5.65 ×10⁻³ kJ.
Part 2-The heat added to the gas during this process will be 5.65 ×10×10⁻³ kJ.
What is work done by the gas?Work is the product of pressure p and volumes V during a volume change for such a gas. The work seems to be the area under the curve that indicates how the state changes.
The work done under the isothermal process is;
[tex]\rm W= P_1V_1 log_e(\frac{P_1}{P_2} )\\\\ W= 7 \times 1.71429 \times 10^{-3} log_e(\frac{7 }{2} )\\\\\ W= 0.0044 \ kJ[/tex]
For the isothermal process;
ΔU=0
[tex]\rm \triangle Q = \triangle E + \triangle W \\\\ Q = 0 + 5.65 \times 10^{-3}\\\\ Q = 5.65 \TIMES 10^{-3} \ kJ[/tex]
Hence, the work done, and the heat added by the gas during this process will be 5.65 ×10⁻³ kJ and 5.65 ×10×10⁻³ kJ respectively.
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It is important to be careful when using nonrenewable resources because
A
there is a limited supply of them and we can’t make any more.
B
harnessing their energy is a very dangerous process.
C
they are more likely to produce excess thermal energy that we can’t use.
D
there is a possibility of finding dinosaur bones in petroleum or coal deposits.
Answer:
The answer is A because it is a resource that takes many many years to make more of and we cannot make it ourselves
Based on the tug of war pictured below, what is the net force? –190 n 10 n –10 n 190 n
The net force in the tug of war which is shown in the picture provided will be 0N.
What is a Force?This is defined as the power exerted on a body and the unit of Force is referred to as Newton.
In the tug of war, the net force is gotten by summing up all the forces.
–190N + 10N –10N + 190N = 0N.
Therefore the net force is 0N.
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Answer:
B. 10 N
Explanation:
EGDE 2022
Which missing item would complete this alpha decay reaction? a. b. c. d. e.
Alpha decay is the term that is used to describe a type of radioactive decay that involves the evolution of a helium nucleus.
What is alpha decay?The term alpha decay is the term that is used to describe a type of radioactive decay that involves the evolution of a helium nucleus. In this case the question is incomplete but I will try to paint a general picture of alpha decay.
The general equation for an alpha decay will produce a daughter nucleus that has an atomic mass less by four units and atomic number that is less by two units.
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A 9-kg body has three times the kinetic energy of an 4-kg body. Calculate the ratio of the speeds of these bodies.
Answer:
speed 9/speed 4 = 2sqrt3 / 3
Explanation:
KE = 1/2 m v^2
for 9 kg = 3 * the 4 kg 1/2 (9)va^2 = 3* 1/2 (4) vb^2
va^2 / vb^2 = 3* 1/2 (4) / (1/2 *9)
6 / 4.5
va / vb = sqrt (6/4.5) = 2sqrt3 /3
ratio of the 9 speed to the speed of the 4 is 2 sqrt 3 /3
Which is not an example of a scalar?
a) 6.2 m north
b) 2 ft/s
c) 3 kg
d) -100 o C
Answer:
b) 2ft/s
Explanation:
A scalar has only magintude, not direction
6.2m, 3kg, and -100 o C are all scalars because they only have magnitude.
2ft/s is not a scalar because it has a direction.
3) In which model are atoms imagined as tiny balls?
a) Dalton
b) Thomson
c) Rutherford
d) Bohr
Answer:
a) Dalton
Explanation:
In Dalton's model atoms are imagined as tiny balls. This model was introduced in the year 1803 by John Dalton.
What does the law of reflection describe?
a a) Wavelength b) Bending of light c) Angles d) Mirrors only e) Laser light
Answer:
e
Explanation:
I think hope it's correct
The energy emitted from a single photon is 1.68 x 10-27 Joules. Which of the following is most likely the type of electromagnetic wave that was
emitted?
Answer:
I think the answer is gamma or x ray
Find the time required to move from the equilibrium position directly to a point a distance 12.3 cm away.A cheerleader waves her pom-pom in SHM with an amplitude of 18.0 cm and a frequency of 0.855 Hz
The time required to move from the equilibrium position directly to a point a will be 0.879 sec.
What is the period of oscillation?The period is the amount of time it takes for a particle to perform one full oscillation. T is the symbol for it. Taking the reciprocal of the frequency yields the frequency of the oscillation.
The standard equation for the SHM is found as;
[tex]\rm x = asin \omega t \\\\ \rm 12.3 \times 10^{-2} = 18.0 \times 10^{-2}sin \omega t \\\\ 0.6833=sin \omega t \\\\ \omega t =sin^{-1}0.6833 \\\\ \omega t =0.7522 \\\\ t = \frac{0.7522}{0.855 } \\\\ t=0.879\ sec[/tex]
Hence the time required to move from the equilibrium position directly to a point a will be 0.879 sec.
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