Answer:
0.33
Explanation:
R= 60N
coefficient of limiting friction = F/R
= 20/60 = 0.33
Mass of Sun
2.0 x 10^30 kg
Mass lost each second 4.3 × 10^9kg
Lifetime of the Sun left 5 x 10 ^9years
Calculate the percentage of the Sun's mass that will
be converted to energy in the remainder of its
lifetime.
Percentage of mass converted to energy =
Answer:
Percentage of mass converted to energy = 99.9 %
Explanation:
By far most of the solar system's mass is in the Sun itself: somewhere between 99.8 and 99.9 percent. The rest is split between the planets and their satellites, and the comets and asteroids and the dust and gas surrounding our star. Seen from afar (on the scale of distances between stars) the presence of the solar system would not be obvious. We would simply see a normal-looking star. Perhaps we would pick up the presence of Jupiter, which makes up two thirds or so of the solar system outside of the Sun, by mass.
what is the significance of the reed dance
Answer:
brings together the unmarried girls and young women of the country to cut reeds for the annual repairs
Answer:
The Umhlanga/Reed Dance brings together unmarried girls and young women of the country to cut reeds for the annual repairs to the windbreaks of the queen mother's village. It lasts for five days, and is also symbol of the unity of the nation.
what are some activities you can do on a regular basis? Physical education
activities you can do on a regular basis for physical education?
If so
WalkingGardeningDancingBicyclingSwimmingYogaDoes the mass of the objects you are charging influence the amount of electric force created in an electric field?
Explanation:
Both gravitational and electric forces decrease with the square of the distance between the objects, and both forces act along a line between them. In Coulomb's law, however, the magnitude and sign of the electric force are determined by the electric charge, rather than the mass, of an object.
Rank the items from slowest to faster
Answer:since time goes to the right you look at the lines that are most pointed to the right with less distance so that would be B, A, D, C
Explanation:
Why is an electromagnet used instead of a permanent magnet in magnetic cranes?
Answer:
an electromagnet is a metal which has the ability to turn into a magnet on passing electricity through it .
But once the electric flow is withdrawn the circuit breaks and it no more behaves like a magnet.
but this is not so in permanent magnets
Explanation:
thus electromagnet is used in magnetic cranes bcoz their magnetism can be controlled conveniently.
definition of angle of incidence
help me pls i really need it...
Answer:
directly proportional
Explanation:
.........,.............
Rewrite the following sentences choosing the right words given between the
| How many/much) (tiverivera) (ts/are) there in Lebanon?
How many/muen) (people/population) (live/lives) in the South
Answer:
How muen population lives in the South
Answer:
How many people live in the South
I'm not sure about the first one sorry
Hey can someone please help answer this question?
A child rides near the edge of a merry-go-round that rotates on a frictionless axis. If the child walks
toward the center of the merry-go-round, will the angular momentum change if a) the child is the
system? b) the system is the child-merry-go-round
Wouldn’t the two be the same? Because it is simply speaking about the child’s angular momentum?
Answer:
yes ............................................ks
Explanation: is good
pennies used to be called coppers. how do you suppose they got this nickname?
Answer:
because pennies are made from copper
Explanation:
what do you call a material which is capable of reducing friction when applied between moving parts?
Answer:
The material is called a Lubricant.
Hope it helps! ☺️
Plz help in this question.
Answer:
The area of the liquid surface does not affect the pressure.
please help me guys please please please please please please please please please please please please please
Answer:
1.F = 256 N
2.a = 8 m/s/s
By looking at the given information, you know force, and an acceleration. Therefore you have enough information to use the first formula.
F = ma
256 N = m * 8 m/s/s
m = 256 N/8 m/s/s
m = 32 Kg
What is the man’s weight on Mars where the acceleration due to gravity is 3.7 m/s2?
Answer:
8.14n in mars
Explanation:
gravitational
A block of lead has dimensions of 4.50 cm by 5.20 cm by 6.00 cm. The block weighs 1587 g. From this information, calculate the density of lead.
Answer:
11.3 g/cm^3
Explanation:
density = mass/volume
volume of rectangular prism = length * width * height
volume = (4.50 cm)(5.20 cm)(6.00 cm) = 140.4 cm^3
mass = 1587 g
density = (1587 g)/(140.4 cm^3)
density = 11.3 g/cm^3
a chef is testing out a new iron cookware. He knows that iron specific heat of 445 j/kg Celsius. he heats a 2kg iron pan on a stove for 5 minutes and finds that the temperature of the iron skillet has increased by 150 degrees Celsius. calculate the amount of heat energy absorbed by the pan.
Answer:
[tex]\boxed {\boxed {\sf 133,500 \ Joules}}[/tex]
Explanation:
Since we are given the specific heat, mass, and change in temperature, we should use this formula for heat energy.
[tex]q=mc \Delta T[/tex]
The mass is 2 kilograms. Iron's specific heat is 445 Joules per kilogram degree Celsius. The temperature increases by 150 degrees Celsius.
[tex]m= 2 \ kg \\c= 445 \ J/kg \textdegree C\\\Delta T= 150 \textdegree C[/tex]
Substitute the values into the formula.
[tex]q= (2 \ kg)( 445 \ J/kg \textdegree C)(150 \textdegree C)[/tex]
Multiply the first two numbers. The kilograms will cancel.
[tex]q= 890 \ J/\textdegree C (150 \textdegree C)[/tex]
Multiply again. This time the degrees Celsius cancel.
[tex]q= 133, 500 \ J[/tex]
The pan absorbs 133,500 Joules of heat energy.
Which orgen in the urinary system regulates the water content and remove the toxic waste products from the blood?
Answer:
The Kidneys
Explanation:
The Kidneys remove the toxic stuff that you dont need anymore. Therefore the kidneys rather than the everything else removes blood and toxic waste.
If you are startled by a sudden loud noise, your (____)
activated.
nervous system is
A. autonomic
B. parasympathetic
C. somatic
D. sympathetic
Answer:
D. sympathetic
Explanation:
AIBr+ __K__KBr + __AI
Answer:
1AlBr3+ 3K ---> 3KBr + 1Al
Explanation:
The diagram below shows a wave. The feature of the wave are labeled A, B, C, and D. Which label identifies the wavelength?
According to the given diagram, the c identifies the wavelength of the curve. Hence, option C is correct.
What is wavelength?In order to characterize waveform signals that are transmitted across wires or into space, the term "wavelength" is used to refer to the separation between two identical positions (adjacent crests) in succeeding cycles. Typically, this length in wireless systems is measured in meters (m), centimeters (cm), or millimeters (mm) (mm). When describing the wavelength of infrared (IR), visible light (UV), and gamma radiation, units of 10-9 nanometers (nm) or angstroms (10-10 m) are more usually used.
The relationship between frequency and wavelength is inverse, with frequency being the number of wave cycles per second. A signal's wavelength shortens as its frequency rises, or we may say that the relationship between wavelength and refractive index is inverse.
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Need help please in physics
Answer:
the switching circuitry is opened the soft iron armature is replaced to tasty le macha the switching circuitry is closed explain what happens when the switch circuit is a wonder you know about the characteristics of open to close this which right take the example of an electric generator for an electric motor which rotates in half rotation and change the armature and just try it ok I am sorry
What determines what we call the phases of the
moon?
Different fractions of the moon
Areas of the moon we cannot see
Days on the calendar
No answer text provided.
The pressure due to the liquid on an object immersed in that liquid is 4500 Pa
The density of the liquid is 900 kg/m.
What is the depth of the object below the surface of the liquid ?
Answer:
The depth of the object below the surface of the liquid is 0.510 meters.
Explanation:
The hydrostatic pressure ([tex]P[/tex]), measured in pascals, experimented by the object is directly proportional to density of the fluid ([tex]\rho[/tex]), measured in kilograms per cubic meter, gravitational acceleration ([tex]g[/tex]), measured in meters per square second, and depth of the object ([tex]h[/tex]), measured in meters. That is:
[tex]P = \rho\cdot g \cdot h[/tex] (1)
If we know that [tex]P = 4500\,Pa[/tex], [tex]\rho = 900\,\frac{kg}{m^{3}}[/tex] and [tex]g = 9.807\,\frac{m}{s^{2}}[/tex], then the depth of the object is:
[tex]h = \frac{P}{\rho\cdot g}[/tex]
[tex]h = \frac{4500\,Pa}{\left(900\,\frac{kg}{m^{3}} \right)\cdot \left(9.807\,\frac{m}{s^{2}} \right)}[/tex]
[tex]h = 0.510\,m[/tex]
The depth of the object below the surface of the liquid is 0.510 meters.
The depth of the object below the liquid's surface will be
"0.510 m".
Pressure and DensityAccording to the question,
Object immersed, P = 4500 Pa
Density of liquid, ρ = 900 kg/m³
Acceleration due to gravity, g = 9.8 m/s²
We know the relation,
→ Hydrostatic pressure (P) = ρ.g.h
or,
Depth will be:
→ h = [tex]\frac{P}{\rho .g}[/tex]
By substituting the values,
= [tex]\frac{4500}{900\times 9.8}[/tex]
= [tex]\frac{4500}{8820}[/tex]
= 0.510 m
Thus the above answer is appropriate.
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Calculate the volume of this regular solid.
A cone 4.5 centimeters high with a radius of 3 centimeters. Label B is pointing to the circular base of the cone.
What is the volume of the cone?
Use the button on your calculator to complete this problem.
Round at the end to the nearest hundredth.
Answer:
42.41
Explanation:
Which of the following shows a balanced nuclear reaction?
Answer:
No. 2
Explanation:
The balanced nuclear reaction is shown by the following: ²³⁷₉₃ Np[tex]\rightarrow[/tex]⁴ ₂He +²³³₉₅ Am nuclear fission reaction.
What are nuclear reactions?There are two types of nuclear reactions which are nuclear fusion and nuclear fission .They involve the combination and disintegration of the element's nucleus respectively.
In nuclear fission, the nucleus of the atom is bombarded with electrons of low energy which splits the nucleus in to two parts .Large amount of energy is released in the process.It is used in nuclear power reactors as it produces large amount of energy.
In nuclear fusion,on the other hand, is a reaction which occurs when two or more atoms combine to form a heavy nucleus.Large amount of energy is released in the process which is greater than that of the energy which is released in nuclear fission process.
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what happens as photons of visible light are absorbed by dye molecules?
what are the different benefit of walking?
Answer:
U can walk to the bathroom
Explanation:
A skier, starting from rest, slides down an icy frictionless 80o incline whose vertical height is 105 m. How fast are they going when the reach the bottom?
Answer:
nadaáaaaaaaaaaaaaa aaaaaaaaaaaaaaa
The particles of an ice cube at 0°C (represented by the blue circles) come in contact with the particles of Juan’s hand at 37°C (represented by the orange circles). Which diagram correctly represents the temperature of the two substances and the direction of heat flow?
Answer:
its b
Explanation:
The diagram which correctly represents the temperature of the two substances and the direction of heat flow is shown below.
What is heat?Heat is also referred to as thermal energy and it can be defined as a form of energy that is transferred from one physical object to another, especially as a result of a difference in temperature.
During the process of heat conduction, heat is primarily transferred between objects with different degrees of temperature and materials that are directly in contact with each other.
In conclusion, heat is generally transferred from a hotter object (37°C represented by the orange circles) to a cooler object (0°C represented by the blue circles) as shown in the image attached below.
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