Answer:
-48
Explanation:
Answer:
6.0
Explanation:
If this is the problem on Khan Academy, I had done this and this was the correct answer.
A4.0 μF capacitor is connected in series with a 2.0 MΩ resistor, and this combination is connected across an ideal 44.0 V DC battery. Initially the charge on the capacitor is zero. What is the current in the circuit when the capacitor has reached 80 % of its maximum voltage?
Answer:
i = 17.6 10⁻⁶ A
Explanation:
The charge of a capacitor in a series circuit is
i = [tex]\frac{v_o}{R}[/tex] [tex]e^{ - \frac{t}{RC} }[/tex] (1)
R i = V₀ e^{ - \frac{t}{RC} }
[tex]\frac{V}{V_o}[/tex] = e^{ - \frac{t}{RC} }
they tell us that the voltage is 80% bone
[tex]\frac{V}{V_o}[/tex] = 0.80
we substitute
0.80 = e^{ - \frac{t}{RC} }
ln 0.80 = [tex]- \frac{t}{RC}[/tex]
t = - RC ln 0.80
in the problem they give the value of R = 2.0 10⁶ Ω and C = 4.0 10⁻⁶ F
t = - 2 10⁶ 4 10⁻⁶ ln 0.8
t = 1,785 s
we substitute in equation 1
i = [tex]\frac{44.0}{2 \ 10^6}[/tex] [tex]e^{- \frac{1.785}{2 \ 4 } }[/tex]
i = 22 10⁻⁶ [tex]e^{-0.2231}[/tex]
i = 17.6 10⁻⁶ A
Suppose A = B"Cm, where A has the dimensions LT, B has dimensions L²T-1, and C has dimensions LT2. Then the exponents n and have the values
Complete Question:
Suppose [tex]A = B^n C^m[/tex], where A has the dimensions LT, B has dimensions L²T⁻¹, and C has dimensions LT². Then the exponents n and m have the values
Answer:
The value of n = ¹/₅
The value of m = ³/₅
Explanation:
Given dimensions;
A = LT
B = L²T⁻¹
C = LT²
The values of n and m are calculated as follows;
[tex]LT = [L^2T^{-1}]^n[LT^2]^m\\\\L^1T^1 = [L^{2n}T^{-n}]\times [L^mT^{2m}]\\\\L^1 \times T^1 = [L^{(2n+m)}] \times [T^{(-n +2m)}]\\\\1 = 2n + m -----(1)\\\\1 = -n + 2m ----(2)\\\\from \ (1); \ m = 1-2n, \ \ substitute \ the \ value \ of \ m \ in\ (2)\\\\1= -n +2(1-2n)\\\\1 = -n + 2-4n\\\\1-2 = -5n\\\\-1 = -5n\\\\1= 5n\\\\n = \frac{1}{5} \\\\m = 1 - 2n\\\\m = 1 - 2(\frac{1}{5} )\\\\m = 1- \frac{2}{5} \\\\m = \frac{3}{5}[/tex]
Four resistors , R1=12ohms, R2= 15 ohms , R3= 18 ohms and R4=10 ohms are connected to 6 v battery in series what is the total resistance in the circuit?
Answer:
55 ohms
Explanation:
if it was series circuit, then you just need to add all the resistances
A student holds two iron magnets, one in each hand. The south pole of one magnet is pointed toward the south pole of the other magnet. As the magnets get closer to each other, they will–
A-attract more strongly.
B-attract more weakly.
C-repel more strongly.
D--repel more weakly.
An example of any movement showing at least four different energy transformations
A stretched wire under tension T Produces a note of frequency 60Hz
when plucked. Calculate the frequency if the tension in the wire is increased by 125%
The answer to your question is 96 Hz
A saw blade, starting at rest, accelerates at 27 rad/s^2 for 5.0 seconds
a. What angular speed will the blade have at the end of the 5.0 seconds
b. If the blade continues at the speed that was reached in part a, through what angle will the blade have rotated in another 5.0 seconds
please go to my profile and answer the work and energy questions, i only have 20 minutes left to finish it
Answer:
Okay I'll do it right now
Explanation:
:)
if speed is the same for two planets, which planet has a longer orbit? PLSSS
HELP ME!!!
Answer:
Pluto because is the farest away from the sun
Calculate What is the change in speed of the P
wave as it goes from the mesosphere to the outer
core? From the outer core to the inner core?
lithc
asthenosphere
Calculate the period of oscillation of a pendulum with a small amplitude whose length is 2.5 meters
Answer:
T = 3.17 s
Explanation:
Given that,
The length of the pendulum, l = 2.5 m
We know that the period of oscillation of the pendulum is given by :
[tex]T=2\pi \sqrt{\dfrac{l}{g}}[/tex]
Where
g is the acceleration due to gravity
[tex]T=2\pi \sqrt{\dfrac{2.5}{9.8}}\\\\T=3.17\ s[/tex]
So, the period of oscillation is equal to 3.17 s.
Spherical mirror is a
Answer:
Spherical mirror is a mirror with a curved reflecting surface.
There are two spherical mirrors -
Concave andConvexConcave Mirror - A spherical mirror , whose reflecting surface is curved inwards , that is , faces towards the centre of the sphere , is called concave mirror.
Cnovex Mirror - A spherical mirror whose reflecting surface is cirved outwards is called convex mirror.
Explanation:
Points of difference :
The reflecting surface of the concave mirror is bulged inwards . But the reflecting surface of the convex mirror is bulged outwards.Concave mirror produces real and inverted images ( except when the object is placed between F and P , concave mirror produces virtual and erect image ) . But is convex mirror always produces virtual and erect images.The image formed by the concave mirror may be enlarged or diminished, according to the position of the object. The image formed by convex will be always diminished.At what time does the oscillator shown below first reach its Equilibrium Position?
1864+7397=8199436 thats it
Answer:0.45s
Explanation:
Trust me
why can many ecosystems exit in one biome?
Answer:
Plants and animals that live in a biome must be able to live and reproduce in the conditions
Explanation:
65mi/hr South is an example of
Answer:
It's an example of velocity.
A motorboat is tied to a dock with its motor running. The spinning propeller makes a surface wave that moves at a speed of 400 cm/s with a wavelength of 100 cm. What is the wave’s frequency?
4 Hz
40 Hz
0.25 Hz
25 Hz
Answer:
The wave frequency is 0.25Hz .
Answer:
4 Hz
Explanation:
1. Speed = Wavelength x Wave Frequency can be changed to Frequency = Speed/Wavelength.
2. Speed (400) / Wavelength (100) = Frequency of 4 cm/s or 4 Hz.
The net force of a heavy, stationary box is?
Answer:
gravity
Explanation:
How much force is needed to accelerate a vehicle with a mass of 1000 kg at a rate
of 5 m/s2?
In a free body diagram all the forces are depicted as pointing _______ the central box
Answer:
There are three forces acting upon the system - the gravity force (the Earth pulls down on the 15.0 kg of mass), the normal force (the floor pushes up on the system to support its weight), and the applied force (the hand is pushing on the back part of the system).
Explanation:
Answer:
what he said
Explanation:
A bicycle has a momentum of 25.00 kg·m/s and a velocity of 2.5 m/s. What is the bicycle’smass?
Answer:
10 kg
Explanation:
p=ma
25=2.5m
m=25/2.5
m=10 kg
mark as brainliest plzzzzz
what occurs after stating your hypothesis when using the scientific method?
1. conclusion
2. observation
3. experiment
4. results
Answer:
experiment
Explanation:
it goes observation
question
hypothesis
experiment
I'll give brainiest if you answer this
Two 15 N forces in same directions are acting on an object. What is the magnitude of the net force?
Answer:
30N
Explanation:
if it is pushing the object to the left then it would be 30N left and if it is pushing the object to the right it would be 30N right
Answer: 30N
Explanation:
20 A measure of the speed and direction of an object's motion
a. velocity
b. speed.
c. momentum
Select the correct answer.
Anna will wear a black dress when she attends her cousin's wedding. Which color(s) does the dress absorb?
O A.
all colors
B.
no colors
Ос.
red and green
OD. white
Answer:
B
Explanation:
B
Provide any THREE types of financiei esitance that can be for
after Grade 12 to study and briefly discuss them
Answer:
University Need-Based Scholarships.
Federal and State Grants and Scholarships.
Loan Assistance.
Academic Year Student Contribution: AYSC.
Student Employment.
Outside Scholarships.
doing tutors for class 5 below
working as a waitree
and doing small business
what are solar winds made of?
A. charged particles
B. nitrogen gas
C. oxygen gas
D. plasma
Answer:
Charged particles
Explanation:
It's correct
Answer:
Charged particles
Explanation:
The solar wind is a stream of energetic (charged) particles that the Sun ejects. These include hydrogen's electrons and protons, as well as atomic nuclei like helium, which are known as alpha particles. There are also evidence of 'heavy ions' and carbon, nitrogen, oxygen, neon, and magnesium atomic nuclei.
Bees can see into the ultraviolet region of the electromagnetic spectrum. Compared with humans, bees can sense electromagnetic waves that have a lower frequency and a shorter wavelength. a higher frequency and a longer wavelength. a lower frequency and a longer wavelength. a higher frequency and a shorter wavelength.
Answer:
a higher frequency and a shorter wavelength.
Explanation:
The correct answer would be a higher frequency and a shorter wavelength.
The visible region of the electromagnetic spectrum lies between 400 and 750 nm while the ultraviolet region lies between 300 and 400 nm. Hence, it means that bees are able to see at a shorter wavelength compared to humans.
There is an inverse relationship between the wavelength and frequency of a wave. the longer the wavelength of a wave, the shorter the frequency, and the shorter the wavelength, the higher the frequency. The means that bees are not just able to see at a shorter wavelength but at a higher frequency compared to humans.
Answer:
D
Explanation:
What is the density of a 10.0 g object with a volume of 4.00 cm^3?
Answer:
d=m/v
d=10g/4cm³
d=2.5g/cm³
Which of the following was not first proposed by Charles Darwin?
A. Natural selection
B. Genetic drift
C. Struggle for existence
D. Survival of the fittest
Answer:
C. Struggle for existence
Explanation:
Have a great day