Explanation:
We have,
Number of turns in a coil is 41
Dimensions of a rectangular coil is 5 cm by 10 cm
Initial magnetic field is 0 and new field is 0.52 T. The magnetic field is directed perpendicular to the plane of the coil.
It is required to find the magnitude of the average emf that is induced in the coil if the displacement occurs in 0.330 s. According to Faraday's law,
[tex]E=\dfrac{-d\phi}{dt}[/tex]
[tex]\phi[/tex] = magnetic flux
[tex]E=\dfrac{-d(NBA)}{dt}\\\\E=NA\dfrac{-(B_f-B_i)}{dt}\\\\E=41\times 0.005\times \dfrac{(0.52)}{0.33}\\E=0.32\ V[/tex]
So, the magnitude of induced emf is 0.32 V.
Help.
1. why is the greenhouse effect important to life on earth?
2. How is the greenhouse effect related to the problem of global warming?
Answer:
1. the greenhouse effect is important cause they hold onto some of earths heat. The heat that it traps is whats keeping our planet warm.
2. when u have too much of the gas than the earth becomes hotter. similar to when the the earthy gets 1 degree hotter.
Which of the following is an example of a noninfectious disease?
A. hepatitis
B. food poisoning
C.the flu
D. lung cancer
Answer:
D. lung cancer
Explanation:
pls mark brainliest
3. The circuit below shows two outdoor lights, run by a battery. Four amps of
current leave the battery. Explain how the current splits to go through both light
bulbs. Be as specific as you can.
Answer:
The answer to your question is given below.
Explanation:
From the diagram given in the question, we can see that the bulbs are in parallel connection. This implies that different current will go through the bulb but the same voltage. But the resistance of each bulb is the same, therefore the same current current will go through them.
This can further be understood if we determine the current flowing through each bulb. This is illustrated below:
Voltage (V) = 30V
Resistant 1 (R1) = 15Ω
Current 1 (I1) =..?
V = I1R1
30 = I1 x 15
Divide both side by 15
I1 = 30/15
I1 = 2A.
Voltage (V) = 30V
Resistant 2 (R2) = 15Ω
Current 2 (I2) =..?
V = I2R2
30 = I2 x 15
Divide both side by 15
I2 = 30/15
I2 = 2A.
The overall current(I) in the circuit:
I = I1 + I2
I = 2 + 2 = 4A.
From the illustrations above, we can see that the same current will flow through each bulb as the will current split into two equal parts
PLEASE HELP!!!!! An electron jumps from one energy level to another in an atom radiating 4.5*10^-19 Joules. If Planck's constant is 6.63*10^-34Js, what is the wavelength of the radiation? (C =3*10^8) 2)
Answer: λ = 4.42 × 10^-7 metres
Explanation:
The emitting radiation energy is the change in energy dE. Where
dE = 4.5×10^-19J
Planck's constant h = 6.63*10^-34Js,
Speed of light C = 3×10^8
The wavelength(λ) of the radiation can be calculated by using the formula
(λ) = hC/dE
Substitute all the parameters into the formula above
(λ) = (6.63×10^-34 × 3×10^8)/4.5×10^-19
(λ) = 1.989^-25/4.5×10^-19
(λ) = 4.42×10^-7 m
Therefore, the wavelength (λ) of the radiation is 4.42 × 10^-7 metres
What kind of friction exists between solid objects moving in water?
static friction
sliding friction
rolling friction
drag
Answer:
Drag friction.
Explanation:
If you have a solid object, go through air, it experiences drag because the air molecules push back a tiny bit. This drag is enhanced because in water, the molecules are more resistant than air, that's why if you try to run in knee deep water, you experience much more drag than when you are running with your legs out of the water.
20 point question B)
Description:
As we know that the sun offers what most of the world has to go examples could be energy, air. As we also know that heating causes liquid and water that is frozen to evaporate to water vapour gas. Meaning the sun provides the energy necessary for evaporation.
Answer: B
Please mark brainliest
Hope this helps.
A ray in oil (n = 1.52) reaches a boundary with water (n = 1.33) at 55.9 deg. Does it reflect internally or refract into the air?
Answer:
Ray reflects internally
Explanation:
Given:
Ray in oil (n1) = 1.52
Ray in water (n2) = 1.33
θ = 55.9°
Computation:
Step 1 . Find critical angel(θc)
Sinθc/Sin90° = Ray in water / Ray in oil
Sinθc/1 = 1.33/1.52
θc = 61°
Since, θ = 55.9° is smaller than θc = 61°
So, Ray reflects internally.
Answer: refracts it
Explanation: i used the answer on acellus
and it was wrong
A yellow laser provides 210 kJ/mol of energy to excite electrons in a sample. What is the frequency of this light?
Answer:
Frequency, [tex]f=5.24\times 10^{14}\ Hz[/tex]
Explanation:
It is given that, a yellow laser provides 210 kJ/mol of energy to excite electrons in a sample. We need to find the frequency of this light.
Energy, E = 210 kJ/mol
i.e.
[tex]E=210\ \dfrac{kJ}{mol}\\\\E=210\times 1000\ \dfrac{J}{mol}\\\\E=\dfrac{21\times 10^4\ J/mol}{6.022\times 10^{23}\ /mol}\\\\E=3.48\times 10^{-19}\ J[/tex]
The energy used to excite electrons is given by :
[tex]E=hf\\\\f=\dfrac{E}{h}\\\\f=\dfrac{3.48\times 10^{-19}}{6.63\times 10^{-34}}\\\\f=5.24\times 10^{14}\ Hz[/tex]
A dead organism is the same as a nonliving thing in science.
Fact:
Evidence:
Answer:
Myth: A dead organism is the same as a nonliving thing in science. ... Things that are dead once did have the characteristics of life, but when they die, they lose some of the characteristics. That is why dead and non-living are NOT the same thing.
Answer:
Non-living thing is never alive.
Dead thing was once alive.
Living things can breathe, grow, reproduce, detect and respond to the changes in the environment, excrete, use the energy from the environment. E.g., Animals
Non-living things don't exhibit these characteristics. E.g., Soil, air
Let's take an example of living things, say lion. When a lion dies, we never say,”Lion has become a non living thing now”. But we say,” Lion is dead”. Death can only happen to living things.
Lion is dead now. But it was once alive.
But soil is never alive. Never dead too!
Hope this helps!
Have a great day!
Explanation:
O A. Feeding sugar to a child at times will not harm the child.
O B. Bribing a child is okay if used judiciously in critical situations.
OC.
It is alright to argue in a mature manner in front of kids.
OD
You should always deal with misbehavior firmly.
Answer:
Bribing a child is okay if used judiciously in critical situations.
You should always deal with misbehavior firmly.
Hope this helps..Pls mark as Brainliest!!
Answer:
B. Bribing a child is okay if used judiciously in critical situations.
D. You should always deal with misbehavior firmly
Hope this helps, and please mark me brainliest if it does!
What are two layers that can stop alpha radiation?
non-ionizing radiation and ionizing radiation.
What are the seven different forms of energy? Give an example of each.
Answer:
Form of energy: Example
1. Light energy: Electromagnetic radiation
2. Nuclear energy: Nuclear fission
3. Chemical energy: Energy stored in plant matter
4. Electrical energy: Lightning
5. Thermal energy: A hot surface
6. Sound energy: A tuning fork
7. Solar energy: Energy from the Sun
8. Mechanical energy: A moving vehicle
Car A
Mass: 1,500 kg
Velocity: 10 m/s
Car B
Mass: 1,500 kg
Velocity: 25 m/s
Car C
Mass: 1,000 kg
Velocity: 10 m/s
Which order shows decreasing momentum?
car c
because light weight objects can move fast but it goes slow
hope it helps :-)
Answer:
B,A,C
so yeah
You stand on a bridge above a river and drop a rock into the water below from a height of 53 m. What is the acceleration of the rock as it falls
Answer:
9.8
Explanation:
Accereration due to gravity
Answer:
9.8 m/s^2
Explanation:
Acceleration due to gravity (freefall)
Comparing X-ray to radio wave, which has a shorter wavelength?
X-ray
radio wave
they both have the same wavelength
Other:
Answer:
x-ray
Explanation:
X-rays can penetrate through matter because of their high frequencies while radio waves are not able to do so as much. If you think about it, taking an x-ray requires a lot more energy than for radio waves to allow you to listen to songs on the radio. Hope this helps :)
The tip of a triangle is held 12.0 cm above the surface of a flat pool of water. A submerged swimmer in the pool sees the tip of the triangle at what distance above the water? Let the indices of refraction nwater = 1.33 and nair = 1.00.
Answer: 9cm
Explanation:
Refractive index can also be defined as the ratio of the real depth to the apparent depth.
Given that the
Real depth = 12 m
Refractive index of water = 1.33
Refractive index of air = 1.00
nair/nwater = real depth/apparent depth
Substitute all the parameters into the formula
1.33/1 = 12/ apparent depth
Cross multiply
1.33 Apparent depth = 12
Apparent depth = 12/1.33
Apparent depth = 9.02 cm
Therefore, A submerged swimmer in the pool sees the tip of the triangle at 9cm approximately distance above the water.
The length of a vector indicates the magnitude of the vectoor
A. True
B. False
Answer:
True
Explanation:
Starting with the Sun, trace the path of energy that occurs in order for you to lift a
book off the ground, describing each energy transformation.
plz leave an explanation thx c:
Answer: see the answer in the explanation.
Explanation:
The energy produce by the sun is called solar energy which eventually produces light energy. The light will make you to see the book and insinuate mechanical energy within you. In order for you to lift abook off the ground the energy involved is mechanical energy which involves potential energy to kinetic energy transformation
A student finds a resistor in an old transistor radio. When the resistor is attached to a 1.5 V cell, the flow of current is measured at 0.025 A. When the resistor is attached to four 1.5 V cells, the current is measured at 0.1 A. When the resistor is attached to a 9 V battery, the current is measured at 0.15 A. Is the resistor an ohmic resistor? Explain how you know.
Answer:
yes
Explanation:
because no matter what voltage you connect it up to, the current always increases proportionally to the voltage.
this is because it follows ohm's law V = I X R.
(voltage = current X resistance)
so to calculate the resistance, change the formula to R = V / I giving you 60 ohm (resistor value)
the value of the resistor is always 60 ohm's, no matter which combination of voltage and current you used and measured, so it follows ohm's law, therefore being an ohmic resistor
When lunging or squatting, your knees should not: A. Be out of alignment with your ankles B. Come forward past your toes C. Bend your knees to 45 degrees D. All of the above
Answer:
B, come past your toes.
Explanation:
Answer:
B i just took the quiz
Explanation:
A space shuttle is sitting stationary at the launch pad.
What is the kinetic and potential energy of the shuttle?
A. potential energy: low
kinetic energy: low
B. potential energy: low
kinetic energy: zero
C. potential energy: high
kinetic energy: low
D. potential energy: high
kinetic energy: zero
Answer:
The answer is B.
Explanation:
I got the question right on this one.
Answer:B. potential energy: low
kinetic energy: zero
Explanation:
Please answer as soon as possible.
A Physics question about electricity and circuits.
If we have several different light bulbs connected to a battery in series, then ___.
The resistance will be the same across each bulb.
The current will be the sum of individual voltages across each bulb.
The current will be the same across each bulb.
The voltage will be the same across each bulb.
Answer:
The current will be the same across each bulb.
HELP PLEASE WITH THE HIGHLIGHTED
Answer:
flash from marvel
mach is:
In fluid dynamics, the Mach number is a dimensionless quantity representing the ratio of flow velocity past a boundary to the local speed of sound.
Explanation:
Help.
1. why does the sun have the greatest amount of gravity in our solar system?
2. Explain why the force of gravity is the greatest between the sun and mercury?
3. why do you think mercury and all of the other planets do not fall into the sun?
Answer:
1.because we are not that near the sun.
2.because mercury is closer to the sun so the Mercury takes the greatest gravity.
3.because of the centripetal force
A denser medium will generally make a sound wave travel
faster
the same speed
not at all
slower
The correct answer is A. Faster
Explanation:
Sound, which is composed of vibration, travels through waves. Additionally, the speed of sound waves is affected by the medium and the density of it. Indeed, the denser the medium is the higher the speed of sound is. For example, in the air, the speed of sound is around 343 meters per second while in water and similar liquids that have a higher density the speed is approximately 1500 meters per second, and this speed increases if the sound travels through a solid. This occurs because in dense substances particles are closer, and therefore waves can travel faster. Thus, in a denser medium will generally make a sound wave travel faster.
You can re-direct your strong emotions by doing which of the following? A. Help someone else. B. Listen to music. C. Do something you enjoy. D. All of the above
Answer:
D. All of the above
Explanation:
Everyone does something different to re-direct their strong emotions.
Cooling down after a workout allows the oxygen to continuing moving through the body and keeps the muscles from tightening up to fast.
True
False
Answer: true
Explanation:
Answer:
True
Explanation:
1.)A circuit has a current of 0.5A and a resistence of 8 ohms. What is the resistence? 2.) A circuit has a voltage of 9V and a current of 3A, what is the resistence?
1. are you serious asking the resistance? it's 8 Ohms. if you ask the voltages the result is
v = i . r
v = 0.5 . 8 = 4V
2. r = V/i = 9/3 = 2 ohm
The human brain can handle only one attention-consuming task at a time
T
F
Answer:
that statement is true, trust me lol
