Answer:6.28 cm³
Explanation radius of piston is 0.01 m = 1 cm
Area A =pi·r² = 3.14 cm². And height h= 0.02 m = 2 cm
Volume V= Ah
A metal cube 1.0 cm on each side is sandwiched between two electrodes. The electrodes create a 0.0050N/C electric field in the metal. A current of 9.0 A passes through the cube, from the positive electrode to the negative electrode. Identify the metal.
a-Tungsten
b-gold
c-silver
d-copper
Answer:
This is Tungsten .
Explanation:
Electrical field E = V / l , V is potential diff and l is length
.005 = V / .01
V = .005 X .01 = 5 X 10⁻³ volts
I current = 9A
Resistance R = V / I
= 5 x 10⁻³ / 9
= 5.55 x 10⁻⁶ ohm .
To calculate resistivity :
R = ρ l / S , l is length , S is cross sectional area
5.55 x 10⁻⁶ = ρ x .01 / .01 x .01
ρ = 5.5 x 10⁻⁸
This is Tungsten .
Help please help me?
Answer:
C. Planet D has the greatest mass and will exert a greater gravitational force
1. Is it possible for the ball to move so quickly that the angle between the cable and vertical post stays at ninety degrees?
2. When the ball is moving in a horizontal circle, what vertical force (or component) balances gravity?
3. What happens to the centripetal force as the length of the cord increases?
Answer:
Tetherball is an interesting game in which two players tries to hit the ball hard so that it goes around the
pole.Each time the player hits the ball, it's orbit rises higher off the ground.Let's understand the physics
behind this.The motion of a tetherball is governed by two forces.These two forces combine to generate a
net force, i.e. centripetal force.If the ball is moving more quickly, it requires a greater centripetal force,
which in turn requires a greater tension force.Since the ball's weight hasn't changed, the angle of the
tension force changes until the ball is in vertical equilibrium.
To access this physics simulation visit: http://goo.gl/xVdwgO Page 02Exploration Series www.ck12.org
Ball Mass : This slider controls the mass of the ball. A ball with more mass will have more inertia, requiring
a greater net force to accelerate it. A ball with more mass will ALSO have a greater gravitational force
acting on it. Watch both of these effects occur when you manipulate this slider.
Cable Length : This slider controls the length of the cable. A longer cable is capable of allowing a greater
circular radius of motion for the ball. It is important to remember that the radius of the circular motion is
NOT equal to the length of the cable. Instead, if you want to understand the size of the circle of the ball's
motion, ignore the cable and just imagine the path of the ball.
Ball Speed : This slider controls the speed of the ball - imagine a kid just hit the ball and it sped up. A ball
moving more quickly is also accelerating more quickly because its velocity is changing as it moves in a
circle (remember that changes in DIRECTION of velocity 'count' as changes to velocity).
Force Diagram : This allows you to turn on or off the diagram of the forces acting on the ball. Look for the
ball to be in vertical force balance, which means the vertical component of tension is canceled by the
gravitational force. The ball should NOT be in horizontal force balance - it is accelerating towards the center
of the circle! It is important to note that this free body diagram should really be moving with the ball so that
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the tension force always points along the cord - we are just showing the forces at the moment the ball is at
the furthest-right on this screen.
Centripetal force vs Tetherball speed : This is a plot of centripetal force required to keep the ball in
circular orbit about the pole as a function of its speed. As expected, a more quickly-moving ball is changing
in velocity more often in a given amount of time, and so is accelerating more. This greater (centripetal, or
center-pointing) acceleration requires a greater net force.
Explanation:
Can atoms go bad?, not in the reversible way like ionization and isotopes but really malfunction our die.
Answer:
atoms cannot go bad
Explanation:
Because they stay alive and get good nutriants
You dip your finger into a pan of water twice each second, producing waves with crests that are separated by 0.19 m. (a) Determine the frequency of the water waves. Hz (b) Determine the period of the water waves. s (c) Determine the speed of the water waves.
Answer:
a) The frequency of the waves are = 2 Hz (since you are making two pulses every second)
b)The period of the waves is 0.19 m (as the consecutive crests are separated by 0.19 m)
c) V = L x f
v = 0.19 m x 2 S-1 (Hz is actually per second)
v = 0.38 ms-1
pe nis
2. Predict what will happen if the 80 kg adult was further from the pivot (more right) and explain your reasoning. 3. Predict what will happen if the 30 kg child was closer to the pivot (more right) and explain your reasoning. 4. Test your predictions in the Balance Lab. Make notes about any ideas you have that need to be changed. 5. What are some rules you could use to make predictions for other situations where masses are on a balance
Answer:
2) τ = F x torque increases, 3) troque decreases,
4) man approaches the pivot and the child must move away
5) Σ τ = 0
Explanation:
2) when the man moves away from the pivot his torque increases significantly, since his distance increases
τ = F x
τ = m g x
therefore the system rotates faster
3) when the child approaches the pivot, his troque decreases, because the distance decreases
τ = f x
therefore the system must spin slower
4) If we place the man and the child on the side of a scale, the movement must be the man approaches the pivot and the child must move away, so that the torque is the same and the system can reach a balance
5) the rotational equilibrium expression
Σ τ = 0
is the one that describes the equilibrium of a system with several forces
Following are the solution to the given points:
For question 2:
If the guy was further to the right, say the [tex]5^{th}[/tex] unit,[tex]\to W_2\times d_2=80\times 5=300\ units[/tex]
Since this value is larger than [tex]W_1\times d_1=30\times 8=240\ units[/tex]As just a result, the boards will lean towards the guy, and will tumble to the right.For question 3:
If the girl was [tex]6^{th}[/tex] units closer to a pivot,[tex]\to W_1\times d_1=30\times 6=180 \ units[/tex]
This value is once again less than [tex]W_2\times d_2=80\times 3=240\ units[/tex]As just a result, the boards will tilt towards the guy, and will fall to the right.For questions 4 and 5:
Whenever experimenting, verify that the mass you utilize and the distance you travel are carefully measured. Since even a tiny quantity of ambiguity in such measures can produce unexpected results.Learn more:
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help meee plisssssssssssssssssssssssssssss
Answer:
Resistance = 0.22 Ohms
Current = 13.63636 A
Explanation:
Total resistance for resistors in parallel is given by:
[tex]\frac{1}{T} =\frac{1}{R1} +\frac{1}{R2} +...+\frac{1}{Rn}[/tex] where n is the number of resistors
[tex]\frac{1}{T} = \frac{1}{1.1} +\frac{1}{1.1} +\frac{1}{1.1} +\frac{1}{1.1} +\frac{1}{1.1}[/tex]
if you solve that you get [tex]\frac{1}{T} = 5/1.1 \\\\T = 1.1/5T = 0.22 Ohms[/tex]
Solve current using V=IR
I=V/R =
I=3/0.22
I = 13.63636 A
what is water potential???
Answer:
Water potential is the potential energy of water per unit volume relative to pure water in reference conditions. Water potential quantifies the tendency of water to move from one area to another due to osmosis, gravity, mechanical pressure and matrix effects such as capillary action.
Answer:
water potential is the potential energy of the water per unit volume.
. Determine if approximate cylindrical symmetry holds for the following situations. State why or why not. (a) A 300-cm long copper rod of radius 1 cm is charged with 500 nC of charge and we seek electric field at a point 5 cm from the center of the rod. (b) A 10-cm long copper rod of radius 1 cm is charged with 500 nC of charge and we seek electric field at a point 5 cm from the center of the rod.
Answer:
a) Yes
b) No
Explanation:
In the first case, part a, yes we can say for certainty that cylinderical symmetry holds. Why so? You may ask. This is because from the question, we are told that the length of the rod is 300 cm. And this said length is longer than the distance to the point from the center of the rod, which is 5 cm.
In the second half of the question, I beg to disagree that cylindrical symmetry holds. Again, you may ask why, this is because the length of the rod in this case, is having the same order of magnitude as the distance to the center of the rod. Thus, it is not symmetrical.
Because of surface tension, it is possible, with care, to support an object heavier than water on the water surface. The maximum thickness, h, of a square material that can be supported is assumed to be a function of the length of the side of the square, the density of the material, the acceleration of gravity, and the surface tension of the liquid. Develop a suitable set of dimensionless parameters for this problem.
Answer:
[tex]\pi 1 = \frac{h}{l}[/tex]
[tex]\pi 2 =[/tex] б / [tex]l^2gp[/tex]
[tex]\frac{h}{l} =[/tex] Ф ( б / [tex]l^2gp[/tex] )
Explanation:
Develop a suitable set of dimensionless parameters for this problem
The set of dimensionless parameters for this problem is :
[tex]\pi 1 = \frac{h}{l}[/tex]
[tex]\pi 2 =[/tex] б / [tex]l^2gp[/tex]
[tex]\frac{h}{l} =[/tex] Ф ( б / [tex]l^2gp[/tex] )
and they are using the pi theorem, MLT systems
attached below is a detailed solution
how were the outer planets formed?
Answer:
All planets including the outer larger planets were formed at the same time somewhere around 4.5 Billion years ago.
Explanation:
the young sun drove away most of the gas from the inner solar system, leaving behind the rocky cores also known as the terrestrial planets.
PLEASE HELP!
what would the answer be?
Answer:
Tie aluminium foil on each end of the battery using rubber band, then use copper wire to attach the led to the aluminium foil...... probably would work
A uniform electric field of magnitude 106 kV/m is directed upward in a region of space. A uniform magnetic field of magnitude 0.48 T perpendicular to the electric field also exists in this region. A beam of positively charged particles travels into the region. Determine the speed of the particles at which they will not be deflected by the crossed electric and magnetic fields. (Assume the beam of particles travels perpendicularly to both fields.) m/s
Answer:
[tex]220833.33\ \text{m/s}[/tex]
Explanation:
[tex]E[/tex] = Electric field = [tex]106\ \text{kV/m}[/tex]
[tex]B[/tex] = Magnetic field = [tex]0.48\ \text{T}[/tex]
Velocity is given by
[tex]v=\dfrac{E}{B}[/tex]
[tex]\Rightarrow v=\dfrac{106\times 10^3}{0.48}[/tex]
[tex]\Rightarrow v=220833.33\ \text{m/s}[/tex]
The velocity of the particle is [tex]220833.33\ \text{m/s}[/tex].
A child falls sideways off the sled while sledding on frictionless ice. What happens to the velocity of the sled
Answer:
Same as before.
Explanation:
we can use momentum conservation to solve the problem.
Let mass of child be m and of the sled be M. Also let both have initial velocity u.
since, child fells off on the sled it will still have same velocity of ''u''.
By momentum conservation we have,
(M + m) x u = m x u + M x v
⇒ Mu=Mv
⇒ u=v
Hence, velocity of the sled remains the same.
A metal pot feels hot to the touch after a short time on the shove. what type of material is the metal pot
8. A weight lifter lifts a set of weights a vertical distance of 2 m. If a constant net force of 350 N is exerted on the weights, what is the net work done on the weights? Please show full working out ( not in words)
Answer: Work = change in energy which can be calculated by force * displacement so taking this we can multiply 350n by *2m and we can come out with 700 joules
Explanation: I Hope This Helps I'm new at this.
What are some ways the government can help reduce greenhouse gases?
Answer:
Switching power plants, for example, from coal-burning to gas-burning can significantly reduce emissions. Equip fossil fuel plants with carbon capture and storage technology. ... Although it doesn't exactly reduce emissions, carbon capture technology does prevent emissions from reaching the atmosphere.
Which of the following is the tendency of a system to become more
disordered?
A. Energy
B. Heat
C. Entropy
D. Efficiency
Answer:
b
Explanation:
the more heat the hotel it get which cause more heat
Answer: C. Entropy
Explanation: a pex :)
A solenoid consists of 4200 turns of copper wire. The wire has a diameter of 0.200 mm. The solenoid has a diameter of 1.00 cm. When the solenoid is connected to a 12.0 V battery, we observe that the current increases over time and is 155 mA after 1.50 milliseconds have passed. Assume that the internal resistance of the battery and connecting wires is negligible.
Required:
a. What is the length of wire needed to form the solenoid?
b. What is the inductance of the solenoid?
c. What is the length of the solenoid?
d. What will be the current after three time constants have elapsed?
Answer:
a. The length of the solenoid wire is approximately 131.95 m
b. The inductance of the solenoid is approximately 2.078 × 10⁻³ H
c. The length of the solenoid is 0.84 m
d. The current after three time constants have elapsed is approximately 456.1 A
Explanation:
The given parameters are;
The number of turns in the solenoid, N = 4,200 turns
The diameter of the wire, d = 0.200 mm
The diameter of the solenoid, D = 1.00 cm
The voltage of the battery connected to the solenoid, V = 12.0 V
The current increase = 155 mA
The time for the increase = 1.50 millisecond
The internal resistance of the battery is negligible
a. The length of wire needed to form the solenoid, l = π·D·N
∴ l = π × 0.01 × 4,200 ≈ 131.95
The length of the solenoid, l ≈ 131.95 m
b. The inductance, 'L', of the solenoid is given as follows;
[tex]L = \dfrac{\mu_0 \cdot N^2 \cdot A}{l}[/tex]
Where;
μ₀ = 12.6 × 10⁻⁷ H/m
N² = 4,200²
A = The cross sectional area of the solenoid = π·D²/4
l = Length of the solenoid = d × N = 0.0002 m × 4,200 = 0.84 m
∴ L = (12.6 × 10⁻⁷ × 4,200² × 0.01² × π/4)/0.84 ≈ 0.002078 = 2.078 × 10⁻³
The inductance, L ≈ 2.078 × 10⁻³ H
c.) The length of the solenoid = d × N = 0.0002 m × 4,200 = 0.84 m
The length of the solenoid = 0.84 m
d. The current after three time constant
We have;
∈ = -L × di/dt
di/dt = 155 mA/1.5 ms = 103.[tex]\overline 3[/tex] A/s
∈ = 103.[tex]\overline 3[/tex] A/s × 2.078 × 10⁻³ H = 0.21472[tex]\overline 6[/tex] V
We have;
[tex]\tau = \dfrac{t}{\left(ln\dfrac{1}{1-\dfrac{Change}{Final-Start} } \right)}[/tex]
The change in voltage = 0.21472[tex]\overline 6[/tex] V
The start voltage = 0 V
The final voltage = 12.0 V
t = 1.5 ms = 0.0015 s
We get;
[tex]\tau = \dfrac{0.0015}{\left(ln\dfrac{1}{1-\dfrac{0.21472\overline 6}{12-0} } \right)} \approx 8.3076\times 10^{-2}[/tex]
τ = L/R
Therefore,
R = L/τ =
The resistance = 2.078 × 10⁻³/(8.3076×10⁻²) = 0.0250
The resistance = 0.0250 Ω
[tex]I= \dfrac{V}{R} \cdot \left(1 - e^{-\dfrac{t}{\tau} }\right)[/tex]
Therefore, after three time constants, we have;
∴ I = (12.0/(0.0250)) × (1 - e⁻³) ≈ 456.1
The current after three time constants have elapsed, I ≈ 456.1 A.
A researcher plans to release a weather balloon from ground level, to be used for high-altitude atmospheric measurements. The balloon is spherical, with a radius of 2.00 m, and filled with hydrogen. The total mass of the balloon (including the hydrogen within it) and the instruments it carries is 20.0 kg. The density of air at ground level is 1.29 kg/m3. (a) What is the magnitude of the buoyant force (in N) acting on the balloon, just after it is released from ground level
Answer:
B = 423.64 N
Explanation:
The thrust force in a fluid is equal to the weight of the displaced fluid,
B = ρ g V
where the density is that of air ρ=1.29 kg / m³ and the volume of the spherical balloon is
V = [tex]\frac{4}{3} \pi r^3[/tex]
v = 4/3 π 2³
V = 33.51 m³
let's calculate the thrust
B = 1.29 9.8 33.51
B = 423.64 N
The potential energy of an object is 16.0 joules. The object is 145cm high.
What is the mass of the object?
Answer:
I don't know but you got this!!
What are Heredity and Punnett Squares?
Answer: A Punnett square can be used to predict genotype and phenotypes of offspring from genetic crosses. ... In the P generation, one parent has a dominant yellow phenotype and the genotype YY, and the other parent has the recessive green phenotype and the genotype yy.
Explanation:
Part A
n
Rank the light intensity, from largest to smallest, at the point P in the figures.
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E
D
C
B
A
2 bulbs
3 bulbs
00
4 bulbs
XOXO
1 bulb
2 bulbs
co
T0.5 m
1.0 m
1.5 m
个
1.0 m
p
2.0 m
P
P
OP
Largest
Smallest
The light intensity from largest to smallest ranking will be :
B > D > A=C > E
What is intensity ?
In physics, the intensity is the power transferred per unit area, where the area is measured on the plane perpendicular to the direction of propagation of the energy
equation to find intensity is I = P/ 4π(d^2)
where P = Power
I = intensity
d = distance where the intensity need to be found
let power of 1 bulb be = P
case A = I = P / (1)^2 = P / 1 =P
case B = I = 2P/ (0.5)^2 = 8P
case C = I = 4P / (2)^2 = P
case D = I = 3P / (1)^2 = 3P
case E = I = 2P /(1.5)^2 = 0.8 P
The light intensity from largest to smallest ranking will be :
B > D > A=C > E
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can someone pls help
Answer:i
Explanation:∩
he inductance of a tuning circuit of an AM radio is 4 mH. Find the capacitance of the circuit required for reception at 1200 kHz.
Answer:
4.4pF
Explanation:
the capacitance of the circuit required for reception is given:
wL = [tex]\frac{1}{wC}[/tex]
w = 2π [tex]f[/tex]
Using both equation
Capacitance is given
C = 1 - 4π2 f2 L
1- 4×9.8969×144×10 10 ×0.004
=4.4pF
What is the tension on a rope holding up a 7.50 kg box?
A) 7.50N
B) 73.5N1
C) 7.3N
D) 0.765N
Answer:
B
Explanation:
F=m×g
=7.50×9.8 (standard gravitational force of earth)
=73.5N
The correct option is (b) 73.5N.
Tension is the force produced by pulling something tightly, a strain in a relationship, or physical or mental strain. The feeling of trying to reach a deadline is an illustration of tension. For example -Pulling the rubber band's two ends apart further and further is an illustration of tension.Is tension force?The force transferred through a rope, string, or wire when two opposing forces pull on it is known as the tension force. The tension force pulls energy equally on the bodies at the ends and is applied along the entire length of the wire.F= 7.50 kg is given in this question .
So, we apply formula
F=m×g
=7.50×9.8 (g= 9.8standard gravitational force of earth)
=73.5N
Therefore, The tension on a rope holding up is 73.5N .
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1. What is the ideal mechanical advantage of a wedge that is 12 cm long
and 4 cm wide?
A. 16
B. 48
C. 3
D. 8
The new roller coaster at Carowinds flies along at 80 m/s. How long does it take to
travel 16000 meters of track?
Describe what happens to the magnitude of the net electrostatic force on the electron as the electron
is moved toward the positive plate. [1]
When the electron is moved toward the positive plate, the electrostatic force increases causing the electron to be attracted to the positive plate.
What is the electrostatic force?The electrostatic force is the force tat acts between two charges. The nature of this force is described by the Coulumb law.
When the electron is moved toward the positive plate, the electrostatic force increases causing the electron to be attracted to the positive plate.
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)) What do these two changes have in common?
mixing chocolate syrup into milk
rain forming in a cloud
) Select all that apply.
Both involve chemical bonds breaking.
Both are changes of state.
Both are only physical changes.
Both are chemical changes.
Answer:
Both are only physical changes
Explanation:
A physical change is a change that does not involve or alter the chemical composition of the substances involved. Physical changes form no new substance and can be easily separated into individual constituents. Example of physical changes are change in state, boiling, melting etc.
According to this question, two processes were given as follows:
1. mixing chocolate syrup into milk
2. rain forming in a cloud
These two processes are similar in the sense that they are both examples of physical changes.