Answer:
3125 N
Explanation:
diameter /2 =radius
so r1 =14cm , r2 =35cm
f1/A1 =f2/A2.
f2 = f1 × A2 / A1
=500×1225 pi cm² / 96 pi cm²
f2 =3125N
how is light reflected from a prism
Answer:
White light entering a prism is bent, or refracted, and the light separates into its constituent wavelengths. Each wavelength of light has a different colour and bends at a different angle. The colours of white light always emerge through a prism in the same order—red, orange, yellow, green, blue, indigo, and violet.
What do you know about nuclear energy?
Answer:
Nuclear energy comes from splitting atoms in a reactor to heat water into steam, turn a turbine and generate electricity. Ninety-three nuclear reactors in 28 states generate nearly 20 percent of the nation's electricity, all without carbon emissions because reactors use uranium, not fossil fuels.
please follow methe right-hand tube of the manometer is open to the atmosphere. The pump has been operated so that the mercury levels differ, as shown, by 250 mm. The density of mercury is 13 600 kg / m3. i) Calculate the pressure, in Pa, due to the 250 mm column of mercury.
Answer:
P(ressure) = d g h = density * gravity * height
P = 13600 * 9.8 * .25 = 33,300 Pa
Check: 1 atm = 76 cm = 760 mm height = 1.01 * 10E5 Pa
h = 1.01 * 10E5 / 9.8 * 13600 .758 m = 758 mm for 1 atm
250 / 758 = 1/3 atmosphere = 33,700 Pa close enough for estimates
(the pressure requested is 1/3 atmosphere where 1 atm = 760 mm Hg)
in the Newton's Third Law of Motion state three characteristics
Answer:
Newton's third law: If an object A exerts a force on object B, then object B must exert a force of equal magnitude and opposite direction back on object A. This law represents a certain symmetry in nature: forces always occur in pairs, and one body cannot exert a force on another without experiencing a force itself.
What does v or vf stand for? What SI units are used to measure it?
Answer:
Below
Explanation:
In my experience, vf means final velocity, and v would be the average velocity!
You would write it as ΔV (delta V)
The SI units that are used to measure it are m/s
Hope that helped!
v and vf stand for velocity and final velocity respectively. its SI unit is to measure it is m/s.
What is velocity & Acceleration ?Velocity is "rate in change of displacement with respect to time".
i.e. v= dx/dt. It is denoted by v.
it is also defined as displacement divided time. i.e. v= Displacement÷Time.
Velocity shows how much distance can be covered in unit time. It's SI unit m/s.
Acceleration is rate in change of velocity with respect to time.
i.e. a = dv/dt
if an object changes its velocity in short time, we can say that it has greater acceleration.
a= dv/dt =Δv/Δt = [tex]\frac{v_{i} - v_{f} }{t_{i}-t_{f} }[/tex]
where [tex]v_{i}[/tex]= initial velocity of an object
[tex]v_{f}[/tex]= final velocity of an object
t₂= initial time of an object
t₁ = final time of an object
Hence v is stands for velocity and vf is stand for final velocity,
To know more about velocity, click :
https://brainly.com/question/17127206
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If a ball is rolling at a velocity of 1.5 m/s and has a momentum of 10.0 kg times m/s, what is the mass of the ball?
Answer:
Mass of the ball, M = 6.667 kg
Explanation:
Given data:
Momentum, Mo = 10.0 kgm/s
Velocity of the rolling ball, V = 1.5 m/s
Mass of the body, M = ?
Momentum, Mo = Mass, M x Velocity, V
10.0 kgm/s = M x 1.5 m/s
Divide each side by 1.5 m/s
M = 10.0 kgm/s / 1.5 m/s
M = (6⅔) kg
:. Mass of the ball, M = 6.667 kg
what is the name of the chart that contain elements?
Answer:
Element Chart
Explanation:
It is a chart that provides many different elements.
what are each layer on an atom
Explanation:
Protons electrons and neutrons
A car starts from rest and accelerates uniformly at a rate of 8.0 meter per second squared for 1.0 meters. At the end of this time interval, the car's final velocity is ___ meters per second.
Answer:
The answer is [tex]v=4ms^{-1}[/tex]
Explanation:
Given,
[tex]u=0\,ms^{-1}\\a=8\,ms^{-2}\\s=1\,m\\\\v=?[/tex]
We know,
∴[tex]v^{2}=u^{2} +2as\\=>v^{2} =0^{2} +2*8*1\\=>v^{2}=16\\v=4\,ms^{-1}[/tex]
Hope you have understood this....
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It is better to use crow bar to displace a heavy load than with hands . Give reason .
Explanation:
Cause it multiples force which makes it easier to move.
Class 10 cbse
Question: Draw the ray diagram in each case to show the position and nature of the image formed when the object is placed:
(i) at the centre of curvature of a concave mirror
(ii) between the pole P and focus F of a concave mirror
(iii) in front of a convex mirror
Explanation:
I hope it will help you. But I am in Grade nine .And sry too cuz I told the answer of Grade nine .
the length of air column at which the first resonance was observed when a vibrating fork was placed on a resonance tube was 30cm. Calculate the wavelength of air column and frequency of the fork speed of sound 330m/s
[tex]\boxed{\sf Wavelength=\lambda=4\ell}[/tex]
[tex]\\ \sf\longmapsto \lambda=4(0.3)[/tex]
[tex]\\ \sf\longmapsto \lambda=1.2m[/tex]
Now
[tex]\boxed{\sf Frequency=\nu =\dfrac{v}{\lambda}}[/tex]
[tex]\\ \sf\longmapsto \nu=\dfrac{330m/s}{1.2m}[/tex]
[tex]\\ \sf\longmapsto \nu=275s^{-1}[/tex]
Answer:
Velocity=330m/s=v
Length=l=30cm=0.3m
Wavelength=λ=4ℓ
⟼λ=4(0.3)
⟼λ=1.2m
Now
Frequency= ν= λ/v
⟼ν= 1.2m/330m/s
⟼ν=275s^-1
hope it's help you...!!!!
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When 4050 joules of heat were applied to 150g of aluminum, the final temperature was 50 degree Celsius. What was the initial temperature? Take specific heat capacity of aluminum as 900J/kg degree Celsius.
Answer:
[tex]\boxed {\boxed {\sf 20 \textdegree C}}[/tex]
Explanation:
We are asked to find the initial temperature of aluminum. We will use the following formula.
[tex]q= mc \Delta T[/tex]
Where q is the heat energy, m is the mass, c is the specific heat capacity, and ΔT is the change in temperature, which is also the difference between the final and initial temperature.
[tex]q= mc (T_f-T_i)[/tex]
We know the heat energy applied is 4050 Joules, the mass is 150 grams, the final temperature is 50 degrees Celsius and the specific heat is 900 Joules per kilogram degree Celsius.
We must convert the mass to kilograms because the specific heat is in kilograms. 1 kilogram contains 1000 grams.
[tex]\frac { 1 \ kg }{1000 g }[/tex][tex]150 \ g *\frac{ 1 \ kg }{1000 g } = 150 * \frac {1}{1000} \ kg = 0.150 \ kg[/tex]Substitute all the known values into the formula.
q= 4050 J m= 0.150 kg c = 900 J/g °C [tex]T_f[/tex]= 50°C[tex]4050 \ J = (0.150 \ kg )(900 \ J/kg \textdegree C)(50 \textdegree C -T_i)[/tex]
We are solving for the initial temperature, so we must isolate the variable [tex]T_i[/tex]It is being multiplied by 0.150 kilograms and 900 Joules per kilogram degree Celsius. The inverse operation of multiplication is division, so we divide by both values.
[tex]\frac {4050 \ J}{ (0.150 \ kg )(900 \ J/kg \textdegree C)}= \frac{(0.150 \ kg )(900 \ J/kg \textdegree C)(50 \textdegree C -T_i)}{(0.150 \ kg )(900 \ J/kg \textdegree C)}[/tex]
[tex]\frac {4050 \ J}{ (0.150 \ kg )(900 \ J/kg \textdegree C)}=(50 \textdegree C -T_i)}[/tex]
The units of Joules and kilograms cancel.
[tex]\frac {4050 }{ (0.150 )(900 \ \textdegree C)}=(50 \textdegree C -T_i)}[/tex]
[tex]\frac {4050}{135} \textdegree C = (50 \textdegree C -T_i)[/tex]
[tex]30 \textdegree C = (50 \textdegree C -T_i)[/tex]
50 degrees Celsius is being added to [tex]-T_i[/tex]. The inverse operation of addition is subtraction. Subtract 50 degrees Celsius from both sides.
[tex]30 \textdegree C - 50 \textdegree C= 50 \textdegree C - 50 \textdegree C - T_i[/tex]
[tex]-20 \textdegree C = -Ti[/tex]
[tex]T_i[/tex] is being multiplied by -1. The inverse operation of multiplication is division. Divide both sides by -1.
[tex]\frac {-20 \textdegree C}{-1}= \frac{-T_i}{-1}[/tex]
[tex]20 \textdegree C = T_i[/tex]
The initial temperature of the aluminum was 20 degrees Celsius.
Water does not run out of dropper unless the rubber-bulb is pressed. Why?
Answer:
The pressure inside the dropper is same as the atmospheric pressure when the rubber bulb is not pressed. ... But when we press the rubber bulb the pressure inside the dropper increases and hence the water flows out. Atmospheric pressure acting from outside the dropper balances the pressure exerted by water and water does not come out of a dropper. On pressing the dropper inside pressure of water becomes more than outside atmospheric pressure and water run out. When we press the bulb of a dropper with its nozzle kept in water, air in the dropper is seen to escape in the form of bubbles. Once we release the pressure on the bulb, water gets filled in the dropper.
Thank You
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calculate the potential difference between points x and y
Answer:
4.275v
Thank you
Answer:
-4.27
Explanation:
hope this may help you TQ.
A student uses the right-hand rule as shown.
What is the direction of the magnetic field in front of the wire closest to the student?
O up
Oright
O down
O left
Answer: O:right
Explanation: In this case you place your finger on the current, and your fingers should curl showing the way, you must use your right hand in this case, otherwise that would mean the fingers on your left would bend way back, and snap off, (Not really lol, just saying)
The direction of the magnetic field in front of the wire closest to the student is right. Thus, the correct option is B.
The direction of the magnetic field encircling a current-carrying wire can be determined using the right-hand rule. The magnetic field's direction is shown by the direction in which your fingers wrap around the wire if you point your right thumb in the direction of the current.
In this case, the student is using the right-hand rule with their thumb pointing upward. This means that the direction of the current is flowing into the page, perpendicular to the direction of their thumb.
To determine the direction of the magnetic field in front of the wire closest to the student, we can curl our fingers around the wire in the direction of the current (into the page) while keeping our thumb pointing upward. This results in the direction of the magnetic field being to the student's right.
To learn about Fleming's left-hand rule, click: https://brainly.com/question/20347569
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how is circuit used to make permanent magnet
Answer:
The touch in a circuit is by forming a circuit with the bars, and moving the horseshoe magnet backwards and forwards upon it. Between the two poles a strong current is excited, & on moving the magnet around we magnetize the bars to saturation i.e. to as a high degree as the bar is capable of retaining.
Explanation:
Please give me brainliest! Hope I helped! :)
Question on picture please help
Answer:
the only one I know is physics is not absent in our lives so that's false
Actividad
1: En general, la dificultad para arrancar electrones aumenta de izquierda a derecha en cada periodo de la tabla periódica. Busca en la tabla periódica potasio (K), calcio (Ca) y uranio (U) y basándote en sus posiciones indica cuál de ellos tendrá una función de trabajo más baja y cuál más alta:
Menor función de trabajo:
Mayor función de trabajo:
2.- La energía de un electrón emitido se mide en electrón-voltios(eV). Un electrón con una energía de 1 eV puede superar un campo eléctrico de 1 voltio. En el simulador, aumenta la tensión hasta que encuentres la tensión más alta que todavía permite a los electrones llegar al amperímetro.
Tensión =
El volaje que has encontrado es igual a la energía de los electrones emitidos en eV.
A boy rode a bike and covered 90 km at an average speed equals 36 km/h but he covered the first thirty km in two hours. What is the average speed at which the remaining distance was covered ?
Answer:
40
Explanation:
because his increasing speed
True or false: Pluto is a dwarf planet
Answer:
Pluto is a dwarf planet. Turr
How many cm are in 900 feet? Using the method of dimensional analysis
Plsss helppp me I have a lot of questions pls help me I will mark brainliest!!!
Answer:
kilo means 1000
2a. 0.1
b. 100
c.0.01
d. 0.001
3a.km
b.mL
d.cg
e.mm
g. g
h.kL
A tall pea plant (Tt) is crossbred with a short pea plant (tt). The following Punnett square shows the separated alleles for two pea plants.
Which of the following shows the correct match of the box numbers and the genotype of the offspring?
A. 1 = Tt; 2 = tt; 3 = Tt; 4 = tt
B. 1 = Tt; 2 = Tt; 3 = Tt; 4 = Tt
C.1 = Tt; 2 = Tt; 3 = tt; 4 = tt
D. 1 = Tt; 2 = tt; 3 = tt; 4 = tt
[tex]Hello[/tex] [tex]There![/tex]
The answer is...
A. 1 =Tt; 2 = tt; 3 = Tt; 4 = tt.
Hopefully, this helps you!!
[tex]AnimeVines[/tex]
b Write out the following in full:
103 2 x 106 6.92 x 104 1.34 x 102 10
Can somebody help?
Answer:
b
Explanation:
Describe how you would measure the Volume of an irregular solid object.
You can include any apparatus and equations.
Answer:
Find a recipient that you can put the object completely inside, and fill this recipient with water. After, you put the irregular solid you want to measure the volume inside, and the water will spill out the recipient. So you take the water that spilled out and uses a graduated recipient to measure the volume of water. The volume of the solid will be exactly the same volume of water that spilled of the first recipient
what is the relationship between high frequency and short wavelength? Low frequency and long wavelength?
Answer:
The frequency of a wave is inversely proportional to its wavelength. That means that waves with a high frequency have a short wavelength, while waves with a low frequency have a longer wavelength.
which of the following are fundamental unit ?
I.candela
II.ampere
III.mole
IV.all of these
Answer:
all of these very easy questions
A brick is 32cm long and 10cm wide. It weighs 16N and is lying on the ground. Find the pressure exerted by the brick on the ground.
Answer:
Below
Explanation:
First, we need to convert the dimension from cm to m before plugging it into the equation:
32 / 100 = 0.32 m
10 / 100 = 0.1 m
You can use this equation to find the pressure exerted on the ground
Pressure = Force / Area
Plugging our values in.....
Pressure = 16 Newtons / (0.1)(0.32)
= 16 Newtons / 0.032
= 500 N/m^2
Hope this helps! Best of luck <3
A body of density 9.0cm appears to have mass 27.0g in a liquid of density 1.2gcm. What is the volume of the solid?
Answer:
v * 9.0 = 27.0 + (v * 1.2)