Please help. Brainliest!
Answer:
i dont really know, sorry
Explanation:
Calculate equivalent resistance in the following between points P and Q
[tex] \sf{(i) \: We \: are \: given \: a \: figure \: of \: Series \: Circuit. }[/tex]
[tex] \sf{Here \: Resistances \: are ,}[/tex]
[tex] \sf• \: R_{1} =3 Ω[/tex]
[tex] \sf• \: R_{2} =3Ω[/tex]
[tex] \sf• \: R_{3} =3Ω[/tex]
[tex] \sf{We \: know \: the \: formula \: of \: the \: Equivalent \: Resistance \: for \: Series \: Circuit, }[/tex]
[tex] \bf \orange {\bigstar {\: R_{s} = R _{1} + R _{2} + R_{3}+...+ R_{n}}}[/tex][tex] \sf ⇒ R_{s} =(3 + 3 + 3)Ω[/tex]
[tex] \sf \therefore R_{s} =9Ω[/tex]
[tex] \sf \pink{ \boxed{Answer : 9 Ω.}}[/tex]
[tex] \\ \\ [/tex]
[tex] \sf{(ii) \: We \: are \: given \: a \: figure \: of \: Parallel \: Circuit. }[/tex]
[tex]\sf{Here \: Resistances \: are ,}[/tex]
[tex] \sf• \: R_{1} =3 Ω[/tex]
[tex] \sf• \: R_{2} =3 Ω[/tex]
[tex] \sf• \: R_{3} =3 Ω[/tex]
[tex] \sf{We \: know \: the \: formula \: of \: the \: Equivalent \: Resistance \: for \: Parallel \: Circuit, }[/tex]
[tex] \bf \orange {\bigstar {\: \frac{1}{R_{p}} = \frac{1}{R _{1}} + \frac{1}{R_{2}} + \frac{1}{R_{3}}+...+\frac{1}{R_{n}} }}[/tex][tex] \sf⇒ \frac{1}{ R_{p} } = \frac{1}{3} + \frac{1}{3} + \frac{1}{3} [/tex]
[tex] \sf⇒ \frac{1}{ R_{p} } = \frac{1 + 1 + 1}{3} [/tex]
[tex] \sf⇒ \frac{1}{ R_{p} } = \frac{3}{3} [/tex]
[tex] \sf⇒ \frac{1}{ R_{p} } = 1[/tex]
[tex] \sf \therefore R_{p} = 1Ω[/tex]
[tex] \sf \pink{ \boxed{Answer : 1 Ω.}}[/tex]
If 100 grams of water is to be heated from 24.0°C to 100.0°C to make a cup of tea, how much heat must be absorbed? The specific heat of water is 4.184 J/g∙°C
Solve the problem and show your work.
Answer:
76*
Explanation:
Answer:
Q= 31,798.4
Explanation:
You would use the specific heat formula which is Q=mCΔt
m(mass)=100
C(Specific heat capacity)= 4.184
Δt(change in temperature)=24-100=-76 or just 76 in this case
so Q=(100)(4.184)(76)=
418.4(76)=31,798.4
Therefore the missing value Q(heat lost or gained) equal 31,798.4
Hope that helped! xoxo
A 50,000 kg train car moving at 2 m/s collides and connects to another identical car initially at rest.
Complete question:
A 50,000 kg train car moving at 2 m/s collides and connects to another identical car initially at rest. Find the velocity of the two cars immediately after collision.
Answer:
The final velocity of the two cars after collision is 1 m/s.
Explanation:
Given;
mass of first car, m₁ = 50,000 kg
mass of the second car, m₂ = 50,000 kg (identical to first car)
initial velocity of the first car, u₁ = 2 m/s
initial velocity of the second car, u₂ = 0
let the final velocity of the two cars after collision = v
The final velocity of the two cars can be calculated from law of conservation of linear momentum for inelastic collision.
m₁u₁ + m₂u₂ = v(m₁ + m₂)
50,000 x 2 + 50,000 x 0 = v(50,000 + 50,000)
100,000 = 100,000v
v = 100,000 / 100,000
v = 1 m/s
Therefore, the final velocity of the two cars after collision is 1 m/s.
Please answer the question in the middle
20 points+ Brainliest
A sturdy metal cylinder used for scuba diving is filled with air. The air in the cylinder is heated but the gas is not able to expand. Which type of process has occurred?
A. Isobaric
B. Isothermal
C. Isochoric
D. Adiabatic
Answer:
The answer is B. hope this helps
Explanation:
A person is singing in the shower. They notice that as certain notes become very loud, the shower walls vibrate. Which statement describes this effect? (1 point)
The note is one of the harmonic frequencies for the shower.
The note is one of the natural amplitudes for the shower.
The note is one of the nodes for the shower.
The note is one of the antinodes for the shower.
Answer:
the note is one of the harmonic frequencies in the shower
*sorry i cant spell*
Explanation:
Option B Is correct. The statement that describes this effect will be 'the note is one of the natural amplitudes for the shower.'
What is resonance frequency?Mechanical systems, and charged particles all have a frequency that they vibrate at. This frequency is referred to as the resonance frequency or natural frequency.
When a light or sound wave impacts an item that is already vibrating at a specific frequency, and that frequency happens to match the resonant frequency of the thing being struck, you get resonance.
When the matching vibrations of another item enhance the amplitude of an object's oscillations, this is known as resonance.
An external force or a vibrating system causes another system surrounding it to vibrate with higher amplitude at a set frequency of operation.
Hence option B Is correct. The statement that describes this effect will be 'The note is one of the natural amplitudes for the shower.'
To learn more bout the resonance frequency refer to the link;
https://brainly.com/question/14464561
THE RIGHT ANSWER WILL RECEIVE A BRAINLESS AND POINTS AND THANKS!!! THE RIGHT ANSWER WILL RECEIVE A BRAINLESS AND POINTS AND THANKS!!! What is the fundamental frequency of a mandolin string that is 42.0 cm long when the speed of waves of the string is 329 m/s? with working outs
Answer:
391.67Hz
Explanation:
The fundamental frequency formula in string is expressed as;
Fo = V/2L
V is the velocity of the wave = 329m/s
L is the length of the string = 42cm = 0.42m
Substitute
Fo = 329/2(0.42)
Fo = 329/0.84
Fo = 391.67Hertz
Hence the fundamental frequency of a mandolin string is 391.67Hz
A force of 3kN acts on a car to make it accelerate by 1.5m/s/s. What is the mass of the car?
Answer:
2
Explanation:
To find force it's force = mass times acceleration so to find mass you would divide force by acceleration
what is a example of the doppler effect
Answer:
The change in pitch of a siren on an ambulance
Answer:
Explanation:
The drop in pitch of ambulance sirens as they pass by and the shift in red light are common examples of the Doppler Effect.
Properties of helium
Answer:
Helium has many unique properties: low boiling point, low density, low solubility, high thermal conductivity and inertness, so it is use for any application which can explioit these properties. Helium was the first gas used for filling balloons and dirigibles
The transformation of energy in the picture below is light energy - electrical energy. What object in the house would then complete transformation thermal (heat) energy?
A) toaster
b) blender
c) television
d) remote control car
Answer:
Toaster
Explanation:
A toaster draws electric current (electrical energy) from a wall outlet and converts these moving electric charges into heat (thermal energy) in the filaments that turn red hot to cook your toast. ... As electricity runs through the filaments in a space heater, the electrical energy is converted into heat (thermal energy).
How powerful is a
mobile charger with
an output voltage of
5V and a current of
2A?
Answer:
P = 10 Watts
Explanation:
Given that,
The voltage of a mobile charger, V = 5 V
Current, I = 2 A
We need to find the power of the charger. The formula for the electric power is given by:
P = VI
So,
[tex]P=5\ V\times 2\ A\\\\P=10\ W[/tex]
So, the power of the mobile charge is 10 watts.
PLEASE TELL ME IF IM CORRECT!! IF IM NOT PLS SAY WHAT THE ANSWER IS!!!
Great work on the first one.
The second one is Spring.
(The next position will be #1.
In #1, the southern hemisphere will be tilted toward the sun, so it will be Summer there.
The position just before Summer is Spring.)
Describe the relationship between the amount of charge on an object and the strength of the electric force
Answer:
The electric force is directly proportional to the amount of Charge.
Explanation:
We define the electric force as the attractive or repulsive interaction between any two charged objects in an electric field.
The electric field is investigated by measuring the force on a small positive test charge. This charge is so small that it does not significantly alter the field after testing.
An object having a greater electric charge will exert a greater force on an object than an object having a smaller electric charge.
Hence the electric force is directly proportional to the amount of Charge.
Balance the following chemical equation:
H3PO4 + HCl → PC15 + H20
Answer:
H3PO4 + 5HCl → PCl5 + 4H2O
Explanation:
A candy-filled piñata is hung from a tree for Elia's birthday. During an unsuccessful attempt to break the 4.4-kg piñata, Tonja smacks it with a 0.54-kg stick moving at 4.8 m/s. The stick stops and the piñata undergoes a gentle swinging motion. Determine the swing speed of the piñata immediately after being cracked by the stick
Answer: v = 0.6 m/s
Explanation: Momentum Conservation Principle states that for a collision between two objects in an isolated system, the total momentum of the objects before the collision is equal to the total momentum of the objects after the collision.
Momentum is calculated as Q = m.v
For the piñata problem:
[tex]Q_{i}=Q_{f}[/tex]
[tex]m_{p}v_{p}_{i}+m_{s}v_{s}_{i}=m_{p}v_{p}_{f}+m_{s}v_{s}_{f}[/tex]
Before the collision, the piñata is not moving, so [tex]v_{p}_{i}=0[/tex].
After the collision, the stick stops, so [tex]v_{s}_{f}=0[/tex].
Rearraging, we have:
[tex]m_{s}v_{s}_{i}=m_{p}v_{p}_{f}[/tex]
[tex]v_{p}_{f}=\frac{m_{s}v_{s}_{i}}{m_{p}}[/tex]
Substituting:
[tex]v_{p}_{f}=\frac{(0.54)(4.8)}{(4.4)}[/tex]
[tex]v_{p}_{f}=[/tex] 0.6
Immediately after being cracked by the stick, the piñata has a swing speed of 0.6 m/s.
___________________ is the opposition to the flow of electric charge. (Resistance or Electric power)
Answer:
The answer is Resistance
Answer:
Resistance
Explanation:
it opposes the flow of energy
Why does matter increase in volume when it heats up?
Answer:All three states of matter (solid, liquid and gas) expand when heated. ... Heat causes the molecules to move faster, (heat energy is converted to kinetic energy ) which means that the volume of a gas increases more than the volume of a solid or liquid.
Explanation:well I tried lol she just copied and pasted faster than I could
How do motion and Newton's laws apply to your everyday life? (all the laws)
For me personally, Newton's third law of motion are ubiquitous in everyday life. For example, when you jump, your legs apply a force to the ground, and the ground applies and equal and opposite reaction force that propels you into the air.
Un objeto con una carga de 7μC se coloca en un campo eléctrico uniforme de 200N/C con dirección vertical. ¿Cuál es el valor de la masa del objeto si se queda "flotando" en el campo?
Answer:
m = 1,429 10⁻⁴ kg
Explanation:
For the object to remain floating, the translational equilibrium condition must be met, we set a reference system where the vertical upward direction is positive
F_e -W = 0
F_e = W
q E = m g
we clear
m = [tex]\frac{qE}{g}[/tex]
let's calculate
m = [tex]\frac{7 \ 10^{-6} \ 200}{ 7 }[/tex]
m = 1,429 10⁻⁴ kg
What is one thing magnetism and electricity have in common ?
What does transverse wave mean
Answer:
Transverse wave, motion in which all points on a wave oscillate along paths at right angles to the direction of the wave's advance. Surface ripples on water, seismic S (secondary) waves, and electromagnetic (e.g., radio and light) waves are examples of transverse waves.
Answer:
Transverse wave, motion in which all points on a wave oscillate along paths at right angles to the direction of the wave's advance. Surface ripples on water, seismic S (secondary) waves, and electromagnetic (e.g., radio and light) waves are examples of transverse waves.
Explanation:
Examples of transverse waves include:
ripples on the surface of water.
vibrations in a guitar string.
a Mexican wave in a sports stadium.
electromagnetic waves – eg light waves, microwaves, radio waves.
seismic S-waves.
Which of the following is a valid unit of power?
Kg.m2/s
Kg.m2/ s3
J
Kg2.m2/ s3
Answer:
kg•m^2/s^3
Explanation:
Here, we want to get the valid unit for power
Mathematically, power is time rate of doing work
Work is the product of force and distance
Unit for force is;
kg•ms^-2
work is;
Kg•ms^-2 • s
= kg•m^2•s^-2
Divide through by the s for time;
we have ;
kg•m^2•s^-2/s
kg•m^2•s^-3
And that is;
kg•m^2/s^3
The moon has a smaller mass than the Earth. If
you were to travel to the moon your weight would
A. Increase
B. Decrease
C. Stay the same
D. Vary with day and night
A force acting toward the center of a curved
or circular path is called
A. Balanced forces
B. Net force
C. Centripetal force
D. Gravity
If dropped from the same height, how would
each ball hit the ground?
Wood Plastic Metal
A. Metal first, then plastic, then wood
B. Wood first, then plastic, then metal
C. Plastic first, then metal, then wood
D. They will all hit at the same time
Answer:
Decrease
Explanation:
If you were on the Moon, which has significantly less mass than the Earth, your weight would: decrease
The point that seemed to be giving me a complicated time was being able to distinguish the difference and meaning of weight and mass and being able to apply that to a problem. I kept mixing up the definitions. For example in homework 3.1, one question asked:
If you were on the moon, which has significantly less mass than the earth, your mass would:
a. increase
b. decrease
c. stay the same
d. become zero
The definition of mass is the amount of matter in an object. The definition of weight is the amount or unit of force. For me, I just had to remember that when it asked about weight, it wasn’t referring how heavy an object is. After I was able to recognize that when it came to weight, questions became easier.
The final and correct answer was decreasing. The answer is because the Moon’s mass is less. This means the gravitational force is less on your body, therefore, your mass is going to be lighter
PLEASE ANSWER ASAP!
The formula for kinetic energy is KE = 1/2mv2. If you increase the velocity of an object by 1 m/s, describe the responding change in kinetic energy.
Answer:
A
Explanation:
I took the test on progress learning and got it right.
If we increase the velocity of an object by 1 meter per second, as a result the kinetic energy of the object will increase as velocity is directly proportional to the kinetic energy.
What is Kinetic energy?
The kinetic energy of an object is the energy which the object possesses due to its motion. Kinetic energy is defined as the work which is required be done to accelerate an object of a given mass from the state of rest to its stated velocity.
Kinetic energy is the energy possessed by an object due to its motion. Potential energy is the form of energy which is possessed by an object due to the position or state. Kinetic energy is directly proportional to the mass and velocity of the object. Therefore, if we increase the velocity of an object, then kinetic energy of the object will increase.
Learn more about Kinetic energy here:
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The position of an object in simple harmonic motion is described by the following equation: y=(0.50 m)cos(pi/2)t. What is the amplitude of vibration?
A. 0.75 m
B. 0.25 m
C. 0.50 m
D. 1.0 m
Answer:
C. 0.50 m
Explanation:
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The amplitude of the vibration with the given equation, y = (0.50) cos (π/2 ×t) is 0.50 m. Thus, option C is correct.
What is Simple Harmonic Motion?Simple Harmonic motion is defined as the periodic motion of the body resulting from the dynamic equilibrium. It is defined as the motion in which the restoring force is directly proportional to the displacement of the body.
Simple Harmonic Motion is defined as the repetitive back-and-forth motion of the central displacement. The maximum displacement of one side is equal to the maximum displacement of the other side.
The simple harmonic motion. F ∝ -x or a ∝ -x, where F is force and a is the acceleration of the body, and x is the displacement. The maximum displacement of the body is called the amplitude of the motion.
The energy is purely kinetic at its mean positions whereas the energy is purely potential at its extreme ends. The harmonic motion is also called oscillatory motion.
From the given, SHM equation, y = A sin(ωt) where A is the amplitude of the wave and ω is the angular frequency of the wave. In the cosine function, y = A cos(ωt + Ф) where Ф is the phase change.
Thus, the amplitude of the vibration is 0.50 m. Hence, the correct option is C.
To learn more about Simple Harmonic Motion:
https://brainly.com/question/30404816
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What is angle between the vectors 2i -3j +K
and 3i +2j
?
a. 90°
C. 60°
b. 0°
d. 120°
Answer:
the answer is B
Explanation:
edg 2020
Identify the two layers of the earth in which the actual temperature is hotter than the melting point
Answer:
outer core.....
The two layers of the earth where the actual temperature is hotter than the melting point is outer and inner core.
Layers of the earthThe Earth is separated into four layers.
These layers are the crust, the mantle, the outer core, and the inner core.
The hottest layer is the inside of the Earth.
The inner core is more hot than the outer core.
The force on the inner core is higher.
Therefore we can conclude that both the inside layers of the earth are hotter than the melting point.
Learn more about the Earth’s crust here:
brainly.com/question/7786540
Laura adds 50mL of boiling water to 100mL of ice water. If the 150 mL of water is then put into a freezer, at what temperature will the water freeze?