Answer:
An atom is the smallest part of an element by itself, while molecules are built of multiple atoms.
Three resistors R1= 3 Ω, R2= 5 Ω, and R3 = 2 Ω are connected with 150 V power supply. What is the voltage across R2 ?
a.75 V
b.15 V
c.10 V
d.32 V
If the resistors are in series, it's 75 volts.
If they're in parallel, it's 150 volts.
You never told us series or parallel.
How many calories are released when 6 grams of 100°C steam turns to 0°C ice?
Answer: 4276.2 calories
Explanation:
Given
mass of steam is 6 gm at [tex]100^{\circ}C[/tex]
Conversion of steam to ice involves
steam to water at [tex]100^{\circ}C[/tex]water at [tex]100^{\circ}C[/tex] to water at [tex]0^{\circ}C[/tex]water to the ice at [tex]0^{\circ}C[/tex]Calories released during the conversion of steam to water at [tex]100^{\circ}C[/tex]
[tex]E_1=mL_v\quad [L_v=\text{latent heat of vaporisation}]\\E_1=6\times 533=3198\ cal.[/tex]
Calories released during the conversion of water at [tex]100^{\circ}C[/tex] to water at [tex]0^{\circ}C[/tex]
[tex]E_2=mc(\Delta T)\quad [c=\text{specific heat of water,}1\ cal./gm.^{\circ}C]\\E_2=6\times 1\times 100=600\ cal.[/tex]
Calories released during the conversion of water to the ice at [tex]0^{\circ}C[/tex]
[tex]E_3=mL_f\quad [L_f=\text{latent heat of fusion}]\\E_3=6\times 79.7=478.2\ cal.[/tex]
The total energy released is
[tex]E=E_1+E_2+E_3\\E=3198+600+478.2=4276.2\ cal.[/tex]
Water is flowing at 4.0 m/s in a circular pipe. If the diameter of the pipe decreases to 1/2 of its former value, what is the velocity of the water?
Answer:
v₂ = 16 m/s
Explanation:
We can use the continuity equation, which is as follows:
[tex]A_1v_1 = A_2v_2\\[/tex]
where,
A₁ = Area of inlet = πd²/4
A₂ = Area of outlet = π(d/2)²/4 = πd²/16
v₁ = velocity at inlet = 4 m/s
v₂ = velocity at outlet = ?
Therefore,
[tex](\frac{\pi d^2}{4})(4\ m/s)=(\frac{\pi d^2}{16})v_2\\\\[/tex]
v₂ = 16 m/s
Compare the motions of transverse, longitudinal, and combined waves.
Explanation:
transfer to babes are always at your advice by a particular motion being a particular wave motion along didn't wave is a wave which particular is a medium move a direction parallel to the direction of the wave moves something that is similar in the surveys on the medium moves of the same direction and bathe an accident to one or two Dimensions do in London killing babe attacks in one dimension and transverse waves attacks in two Dimensions the Waze cannot be paralyzed or organized
'If you increase the frequency of a sound wave four times, what will happen to its speed?
ОА.
The speed will increase four times.
OB.
The speed will decrease four times.
O c.
The speed will remain the same.
OD
The speed will increase twice.
O E.
The speed will decrease twice.
Convert 0.0779 kg to g
Can someone pls answer
Answer:
im still in elementry so you got to do it yo self
Explanation:
so me confused
find the torque when the work done to more through an angel of 1/4π radians is 3j
Answer:
The torque is approximately 3.82 N·m
Explanation:
The relationship between work done, 'W', and the applied torque, 'τ' can be presented as follows;
W = τ × Δθ
Where;
W = The work done by the torque
τ = The magnitude of the torque
Δθ = The angle through which the object is turned
The parameters for 'W' and 'Δθ' are;
W = 3j
Δθ = 1/4 × π
From W = τ × Δθ, we have;
τ = W/Δθ
∴ τ = 3j/(1/4 × π) ≈ 3.81971863421 N·m
The torque, τ ≈ 3.82 N·m
At the beginning of a roller coaster ride, the roller coaster car has an initial energy
mostly in the form of PE. Which statement explains why the fastest speeds of the car
will be at the lowest points in the ride?
a. At the bottom of the slope kinetic energy is at its maximum value and potential
energy is at its minimum value.
b. At the bottom of the slope potential energy is at its maximum value and kinetic
energy is at its minimum value.
c. At the bottom of the slope both kinetic and potential energy reach their maximum
values
d. At the bottom of the slope both kinetic and potential energy reach their minimum
values.
Explanation:
The potential energy of the roller coaster is due to its position. It can be calculated as :
P = mgh
Where
m is mass, g is acceleration due to gravity and h is height.
The kinetic energy of an object is given by :
[tex]K=\dfrac{1}{2}mv^2[/tex]
Where
v is the speed of the object
At lowest point, the potential energy of the roller coaster is converted to the kinetic energy. So, At the bottom of the slope kinetic energy is at its maximum value and potential energy is at its minimum value. That's why the speed of the cars is at the lowest points in the ride.
We have that for the Question "Which statement explains why the fastest speeds of the car will be at the lowest points in the ride?"
Option A (At the bottom of the slope kinetic energy is at its maximum value and potential energy is at its minimum value) best explains itoption a explains why the fastest speeds of the car will be at the lowest points in the ride because potential energy decreases with decrease in height. Here the decreased potential energy is converted to the kinetic energy.
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An entertainer pulls a table cloth off a table leaving behind the plates and sliverware undisturbed is an example of
A.
the law of balanced forces
B.
Newton's second law
C.
Newton's third law
D.
Newton's first law
Answer:
D. Newton's first law
Explanation:
Newton's first law of inertia says that an object will remain how it is, unless affected by an outside force. In this case, the plates want to remain stationary(not moving). Therefore, if you pull the table cloth fast enough, the force of friction produced will be small enough so that the Inertia of the plates will overcome the force of friction.
POR FAVOR AYUDENME A RESOLVER ESTO:
Halla el coeficiente de dilatación lineal de una varilla que a 10 grados centígrados mide 125 metros y cuya longitud a 85 grados centígrados es 125.20 m. ¿De qué material será?
Answer:
α = 2.13 10⁻⁵ C⁻¹ , the closest material is ALUMINUM
Explanation:
The expression for thermal expansion is
ΔL = α L₀ ΔT
temperatures are
ΔT = 85 - 10 = 75 ° C
the length of the rod is L₀ = 125 m and L_f = 125.20 m
ΔL = 125.20 - 125 = 0.20 m
α = [tex]\frac{1}{L_o} \frac{\Delta L }{\Delta T}[/tex]
α = [tex]\frac{ 1}{125} \ \frac{0.20 }{75}[/tex]
α = 2.13 10⁻⁵ C⁻¹
When reviewing the table, the closest material is ALUMINUM
Pls help with all questions dew in 10 minutes!
If water is flowing in a 1-inch diameter pipe with an average velocity of 3 m/s and the wall roughness is 400 microns, calculate the wall shear stress.
Answer:
Shear stress is 50.63 Pascal
Explanation:
As we know shear stress = [tex]\frac{\rho V^2 f}{8} \\[/tex]
Rho is the density
V is the velocity
f is the value from Moody's chart
We will know determine Reynolds number to determine the flow type and then the f value
[tex]R_e = \frac{ \rho*V*D}{u}[/tex]
[tex]R_e = \frac{1000*3*0.0254}{0.001} = 76200[/tex]
This is a turbulent flow and hence the roughness index is [tex]\frac{E}{D} = 0.0157[/tex], From this we get f = 0.045
Now shear stress = [tex]\frac{1000 * 3^2 * 0.045}{8} = 50.63[/tex] Pa
1:How are energy and amplitude of a wave related
2:Define Wavelength
3:What unit is the frequency of a wave measured in?
Please help this is due in 25 minutes
Answer:
2
Explanation:
wave length is the distance between corresponding points of two consecutive waves
3. hertz
A rectangular loop with dimensions 4.20 cm by 9.50 cm carries current I. The current in the loop produces a magnetic field at the center of the loop that has magnitude 3.10×10−5 T and direction away from you as you view the plane of the loop. What are the magnitude and direction (clockwise or counterclockwise) of the current in the loop?
Answer:
1.63 A and in clockwise direction
Explanation:
The magnetic field due to the rectangular loop is :
[tex]$B=\frac{2 \mu_0 I}{\pi}\left(\frac{\sqrt{L^2+W^2}}{LW}\right)$[/tex]
Given : W = 4.20 cm
[tex]$=4.20 \times 10^{-2} \ m$[/tex]
L = 9.50 cm
[tex]$= 9.50 \times 10^{-2} \ m$[/tex]
[tex]$B = 3.40 \times 10^{-5} \ T $[/tex]
Rearranging the above equation, we get
[tex]$I=\frac{B \pi LW}{2 \mu_0\sqrt{L^2+W^2}}$[/tex]
[tex]$I=\frac{(3.40 \times 10^{-5}) \pi(9.50 \times 10^{-2})(4.20 \times 10^{-2})}{2(4 \pi \times 10^{-7})\sqrt{(9.50 \times 10^{-2})^2+(4.20 \times 10^{-2})^2}}$[/tex]
I = 1.63 A
So the magnitude of the current in the rectangular loop is 1.63 A.
And the direction of current is clockwise.
I neeed help im so comfused Points Possible: 1, Points Correct: 0 Which group of numbers is listed from greatest to least? -3, -1, 0, 2, 7 9, 7, 6, -5, -4 8, -6, 5, -4, 1 -3, -4, -7, -8, -9
The groups aren't well formatted ;
The groups are ;
(-3, -1, 0, 2, 7) ; (9, 7, 6, -5, -4) ; (8, -6, 5, -4, 1) ; (-3, -4, -7, -8, -9)
Answer:
(-3, -4, -7, -8, -9)
Explanation:
Given the following group of numbers :
Evaluating each group of values for which is correctly arranged from greatest to least.
(-3, -1, 0, 2, 7) : - 1 is greater than - 3 (the group isn't arranged from greatest to least)
(9, 7, 6, -5, -4) : - 4 is greater than - 5 ; hence, the group isn't arranged from greatest to least
(8, -6, 5, -4, 1) : 5 is greater than - 6 ; hence, the group isn't arranged from greatest to least
(-3, -4, -7, -8, -9) ; the group of numbers here is arranged from greatest to least ;
(-3 > -4 > -7 > -8 > -9) ; hence, the correct group
This force on compass dials is an example of a force that _______.
Which statement explains why 49 is a perfect square?
Answer:
It’s the product of 7 x 7. The square root of 49 is 7
Explanation:
It’s the product of 7 x 7. The square root of 49 is 7
As an airplane takes off, the air flows across the wings of the airplane. Which of the following would be the best description? I. The air flow across the top of the wing is greater than the air flows across the bottom of the wing. II. The air flow across the top and bottom of the wing is the same. III. The lift force is present because the pressure across the top is less than the pressure across the bottom of the wing.
Answer:
III. The lift force is present because the pressure across the top is less than the pressure across the bottom of the wing.
Explanation:
Does Direction matter when you are measuring momentum
Answer:
Yes
Momentum is a vector quantity
Explanation:
A vector quantity is a quantity that has both magnitude and direction
So definitely direction matters
Answer:
no on edge 2021
Explanation:
I will mark you brainlist!
What mythical creature do you think is possibly real, and not actually a myth? Why?
Examples of mythical creatures: Mermaids/Merman, Fairies/ Pixie, Nymphs, Dragons, Unicorn, Leprechauns, Werewolf, Loch Ness Monster, Sphinx, Centaur, Griffin, Yeti, Pegasus, Basilisk, Chimera, Ghoul, Imp, Gnome, Manticore, Troll, Bigfoot, Phoenix, Vampire etc.
You can choose one that is listed or not listed.
Explanation:
With most of our blue planet covered by water, it's little wonder that, centuries ago, the oceans were believed to hide mysterious creatures including sea serpents and mermaids. Merfolk (mermaids and mermen) are, of course, the marine version of half-human, half-animal legends that have captured human imagination for ages. One source, the "Arabian Nights," described mermaids as having "moon faces and hair like a woman's but their hands and feet were in their bellies and they had tails like fishes."
C.J.S. Thompson, a former curator at the Royal College of Surgeons of England, notes in his book "The Mystery and Lore of Monsters" that "Traditions concerning creatures half-human and half-fish in form have existed for thousands of years, and the Babylonian deity Era or Oannes, the Fish-god ... is usually depicted as having a bearded head with a crown and a body like a man, but from the waist downwards he has the shape of a fish." Greek mythology contains stories of the god Triton, the merman messenger of the sea, and several modern religions including Hinduism and Candomble (an Afro-Brazilian belief) worship mermaid goddesses to this day.
A runner starts at position A. He runs 40 m North, 10 m East and 40 m
South. Where does he end up in relation the starting position?
a. 40 m North
b. 40 m South
c. 10 m East
d. Position
The plates on a vacuum capacitor have a radius of 3.0 mm and are separated by a distance of 1.5 mm. What is the capacitance of this capacitor?
how molecular motion related with temperature?
Answer:
yes
Explanation:
Geronimo wants to move an object 12 meters. Calculate the net work done by the object with an applied force of 150 N and a friction force of 37 N.
Answer:
1476 J
Explanation:
From the question,
Net Work done = Net force× distance moved by net force.
W' = (F-F')×d................... Equation 1
Where W' = Net work done, F = force applied, F' = Frictional force, d = distance moved.
Given: F = 150 N, F' = 37 N, d = 12 m
Substitute these values into equation 1
W' = (150-37)×12
W' = 123×12
W' = 1476 J.
hence the Net Work done by the object is 1476 J
Bilateria are characterized by Multiple Choice a plane of symmetry around a transverse plane across the center of the body so that the front and back halves are mirror images. a plane of symmetry that forms mirror images around any plane through the longitudinal midline of the body. a plane of symmetry that forms mirror images around a horizontal plane in the midline. a plane of symmetry that forms mirror images around a vertical plane in the midline. a plane of symmetry that forms mirror images around an oblique plane in the midline.
Answer:
A plane of symmetry that forms mirror images around a vertical plane in the midline.
Explanation:
Bilateria are animals that have a bilateral symmetry,
Bilateral symmetry refers to organisms that are mirror images along their midline called a sagittal plane.
Examples of bilateria include butterflies and humans because, a line through their midline divides the organism into two identical halves which are mirror images of each other.
So, Bilateria are characterized by a plane of symmetry that forms mirror images around a vertical plane in the midline.
PLEASE HELP ME I AM TIMED!
Answer:
they all need a source of oxygen
Answer:
B
Explanation:
an airplane has a maximum velocity of 160km/h in still air. calculate its maximum velocity when it travels in air with a crosswind of 30km/h
Answer:
Velocity can be directly added or subtracted.
For example, if a boat has a velocity V in still water.
And now you put the boat in a river with a current that has a velocity V'
The total velocity of the boat in that river is just the addition of these two velocities.
Velocity in the river = V + V'
Where the only tricky part is that the velocity is a vector, so you need to take in account the directions of each vector.
In this case, we have a plane with a maximum velocity of 160km, let's assume a direction for this velocity, let's say that is in the positive x-direction.
Then we can write the velocity in the vector form:
velocity = (vel in x-axis, vel in y-axis)
The velocity of the plane can be written as:
v = (160km/h, 0)
Now we add a crosswind of 30km/h
crosswind means that it is perpendicular, then it acts on the y-axis.
Then the total velocity of the plane will be:
velocity = (160km/h, 0) + (0, 30km/h)
velocity = (160km/h, 30km/h)
Now you can compute the total velocity of the airplane as the module of that vector.
Remember that for a vector (x, y) the module is:
mod = √(x^2 + y^2)
Then the module of the velocity is:
v = √( (160km/h)^2 + (30km/h)^2) = 162.8 km/h
Find the density of a 2 cm x 2 cm x 2 cm cube with a mass of 64 g.
Answer:
8 g/cm³
Explanation:
density=mass/volume
volume=2*2*2=8 cm³
mass=64 g
density=64/8=8 g/cm³
The density of a 2 cm x 2 cm x 2 cm cube with a mass of 64 g is equal to 8 g/cm³.
What is the density?Density can be defined as the material mass per unit of volume. The symbol commonly used to represent density ρ and the letter 'D' can also be used.
The mathematical equation of the density can be represented as written below:
Density = Mass /Volume
or, ρ = m/V
The density of a material varies with pressure and temperature. There is a small variation for solids and liquids of any material but much larger for gases. Increasing the pressure of material decreases the volume and thus increases its density.
Given the volume of the cube = 2 cm x 2 cm x 2 cm
V = 8 cm³
The mass of the cube, m = 64 g
The density of the cube can be calculated from the above-mentioned formula:
Density = Mass of cube/volume
D = 64/8
D = 8 g/cm³
Therefore, the density of the cube is 8 g/cm³.
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True or False: The northern & southern lights are caused by solar wind particles interacting with gases in our atmosphere.
Answer:
False.
Explanation:
An aurora is a natural electric phenomenon that creates bright and colorful light displays in the sky. These dramatic and colorful lights are created when electrically charged particles from solar winds enter the Earth's atmosphere and interact with gases in the atmosphere.