Answer:
18.3Ω
Explanation:
Resistance can be found using the formula:
Resistance = [tex]\frac{Voltage}{Current }[/tex]
Voltage = 110 volts
Current = 6.0 amperes
∴ Resistance = [tex]\frac{110}{6}[/tex]
= 18.3 Ω ( to nearest 3 significant figures)
A 13.0-V battery is connected in series with a switch, resistor and coil. If the circuit's time constant is 1.20 ´ 10-4 s and the final steady current after the switch is closed becomes 2.50 A
Answer:
R = 5.20 Ω, L = 6.24 10⁻⁴ H
Explanation:
The current in an RL circuit is
I = [tex]\frac{E}{R} \ (1- e^{- t/ \tau } )[/tex]
τ = L / R
In the problem they indicate the value of the voltage, the current and the time constant, for which the resistance must be found
The stable current is when enough time has passed (t »τ) after closing the circuit, therefore the exponential term is very small and we can neglect it.
I = E / R
R = E / I
let's calculate
R = 13.0 / 2.50
R = 5.20 Ω
now with this value we can find the inductance of the coil
τ = L / R
L = τ R
L = 1.20 10⁻⁴ 5.2
L = 6.24 10⁻⁴ H
What does a power source act like?
Answer:
In most cases, the electricity source is an outlet, battery, or generator. The power supply works to convert the power from the source into the correct format and voltage. Because a variety of options exist, the specific power supply function depends on whether it needs to regulate energy or convert power.
3. Why is a train so hard to stop even when it is going
slowly?
Answer:
For trains the wheels and the rail are both steel, and the steel-steel friction coefficient is around 0.25. So the stopping time and distance will, at best, be three to four times greater than a car.
Explanation:
An elastic collision is one in which:
Answer:
.conserves kinetic energy and momentum
.does not coalesce
.causes much lesser deformation as compared to inelastic
.the two bodies involved; after collision move with separate final velocities.
Explanation:
eg. throwing a ball at a wall
collision between a punch and your nose,haha
I guess that will cause a lot deformation..
.
A car traveled 30 km in 20 minutes. What is its average speed?
Answer:
One and a half km per minute
Explanation:
Answer:
1.5
Explanation:
THE
Ammeter
А
1
592
o
12
Р
А
er
1002
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Circuit 2
Answer:
child i dont even know the answer for this question
Explanation:
When the football is snapped, which player will have the smallest change in kinetic energy?
If a football player hits the ball with a force of 50 N, determine the reaction force.
Answer: 60
Explanation: if u hit it it will have impact and the impact added 10n
A room that is kept at the same temperature year-round feels warm to someone who comes in from outside during the winter and cool to someone who comes in from outside during the summer. Explain how this can be true.
Answer:
its warmer than outside in winter and its colder than outside in summer
Explanation:
The perception of warmth or coolness is relative to the temperature difference between the body and the environment. Even though the temperature inside the room remains constant year-round, the relative temperature difference between the environment outside and the room can cause a subjective sensation of warmth or coolness.
What is temperature?Temperature is a physical quantity that measures the degree of hotness or coldness of a body or a substance. It is a scalar quantity, which means it has only a magnitude and no direction.
The SI unit of temperature is the Kelvin (K), but the temperature is commonly measured in degrees Celsius (°C) or degrees Fahrenheit (°F) as well.
The temperature difference is the numerical value of the difference between the temperatures of two objects or substances. It represents the amount of heat that flows from one object to another due to the temperature gradient between them. The temperature difference is also a scalar quantity, and its unit is usually expressed in degrees Celsius or Kelvin.
The temperature difference is important in many areas of science and engineering, including thermodynamics, heat transfer, and meteorology. It is also used to measure the efficiency of heating and cooling systems, such as air conditioners and refrigerators.
Here in this question,
This phenomenon occurs due to the relative difference in temperature between the environment outside and the temperature inside the room. The feeling of warmth or coolness is a subjective sensation that depends not only on the actual temperature but also on the difference in temperature between the person's body and their surroundings.
During the winter, the temperature outside is generally colder than the temperature inside the room which is kept at a constant temperature. When a person comes into the room from the cold outside, their body temperature is lower than the room temperature, so they feel warmer inside the room. This is because the heat from the warm room transfers to the person's body, raising their body temperature and making them feel warmer.
On the other hand, during the summer, the temperature outside is usually warmer than the temperature inside the room. When a person comes into the room from the hot outside, their body temperature is higher than the room temperature, so they feel cooler inside the room. This is because the heat from the person's body transfers to the cooler room, lowering their body temperature and making them feel cooler.
Therefore, the relative temperature difference between the environment outside and the room can cause a subjective sensation of warmth or coolness.
To learn about the difference between conduction and convection click:
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#SPJ3
what is the S.I unit of voltage ?
Answer:
V
Explanation:
The S. I unit for voltage is v due to the fact that it's volts.
If you get too many fouls, you may not be able to play in the rest of the game.
A. True
B. False
Answer:
In the NBA that's true
what is significant figures
Explanation:
Significant figures of a number written in positional notation are digits that carry meaningful contributions to the measurement resolution of the number.
Answer:
The value of a physical quantity is expressed by a number followed by some suitable unit.
Explanation:
every measurement of a quantity is an attempt to find true value.
rules for identifying significant figures:
1)All non-zero numbers ARE significant. e.g. The number 33.2 has THREE significant figures because all of the digits present are non-zero.
2)Zeros between two non-zero digits ARE significant. e.g. 2051 has FOUR significant figures. The zero is between 2 and 5.
3)Leading zeros are NOT significant. e.g. The number 0.54 has only TWO significant figures. 0.0032 also has TWO significant figures. All of the zeros are leading.
4)Trailing zeros to the right of the decimal ARE significant. e.g. There are FOUR significant figures in 92.00.
5)Trailing zeros in a whole number with the decimal shown ARE significant. e.g. Placing a decimal at the end of a number is usually not done. By convention, however, this decimal indicates a significant zero. For example, "540." indicates that the trailing zero IS significant; there are THREE significant figures in this value.
If 20,000J of work is used to move a car that is broken down, how much is the change in energy that has occurred?
Answer:
K_f = 20000 J
Explanation:
This is a conceptual exercise, where the relationship between work and kinetic energy should be used
W = ΔK
W = K_f - K₀
In this case, as the car is damaged, its initial velocity is zero and therefore its initial kinetic energy is also zero.
W = K_f
consequently the work is completely transformed into kinetic energy of the car
K_f = 20000 J
Compare and contrast the way molecules behave in liquid to the way they behave in solids and gases.
Answer:
Atoms, molecules, ions are all present in gases, liquids, and solids, but their behavior varies depending on the process. ...gas are well separated and not arranged in any particular order. There is no regular arrangement of liquids, so they are close together. Solids are arranged in a regular pattern and are tightly packed
Explanation:
3-the-lamps are connected in series. The first-lamp-has-a-current-of2-A and
a resistance of 4 Ohms. The second-lamp has a voltage of 10V. The third-lamp has a
voltage of 6V. Find in this diagram the total voltage, the current for all the lamps, the
total-resistance.
A car accelerates from 0 to 72 km/hr in 8 seconds. What is the car's acceleration?
Explanation:
Vi = 0 m/s
Vf = 72 km/hr = (72×5)/18 = 20 m/s
t = 8 s
Vf = Vi + a×t
20 = 8a
a = 2.5 m/s^2
Answer:
Initial Velocity (u) = o m/s
Final Velocity (V) =(72*1000)/1*60*60 m/s
= 20m/s
time (t) =8 sec
Acceleration(a)= v-u /t
=(20-0)/8
=2.5 m/s^2
this is the answer i just did the problem
When is the best time to take a resting heart break
A. One hour after eating a meal.
B. Just before going to bed at night.
C. One hour after vigorous exercise.
D. Just after waking in the morning.
Answer:
I believe D
Explanation:
You need to have a more accurate reading and you want to test it multiple times throughout the week though to get a base resting rate.
I hope this is correct good luck!
A student measures the time it takes for two reactions to be completed.
Reaction A is completed in 39 seconds, and reaction B is completed in 50
seconds. What can the student conclude about the rates of these reactions?
A. The rate of reaction A is higher.
B. The rates of reactions A and B are equal.
C. The rate of reaction B is higher.
Answer:
The rate of reaction A is higher.
answer is AAAAA !
Explanation:
Answer: A. The rate of reaction A is higher
Explanation:
Which equation could be rearranged to calculate the frequency of a wave?
wavelength = frequency/speed
frequency = wavelength/speed
wavelength = speed/frequency
frequency = speed x wavelength
The frequency of a wave is speed/wavelength.
What is frequency?Frequency is the number of cycles completed by a wave in one second.
The S.I unit of frequency is hertz.
The formula for the frequency of a wave is given by
Formula:
v = λf.............. Equation 1Where:
v = speed of the waveλ = wavelength of the wavef = frequency of the wave.Make f the subject of the equation
f = v/λ.............. Equation 2frequency = speed/wavelengthHence, The frequency of a wave is speed/wavelength.
Learn more about frequency here: https://brainly.com/question/301048
Answer:
C
Explanation:
Trust
What caused the light to shine on the paper above the mirror?
O The light was refracted.
The light was reflected.
The light was amplified.
The light was diffracted.
Answer:
The Light was reflected, b.
Explanation:
If the flashlight was pointed at the mirror, it was reflected because it did not stop on the mirror or go through the mirror or reflect in different ways.
explain how height,acceleration,and speed would affect the movement of a roller coaster
Un asensor de masa 500 kg , con cuatro personas a bordo , cada una con una masa de 75 kg , asciende con una altura de 28 metros Calcula la energia potencial que adquiere el asensor
Answer:
U = 2,195 10⁵ J
Explanation:
The potential energy is
U = m g and
in this case each person has a mass of 75 kg and the elevator has a mass of 500 kg, the total mass is
m_total = m_elevator + 4 m_person
m_total = 500 + 4 75
m_toal = 800 kg
let's calculate
U = 800 9.8 28
U = 2,195 10⁵ J
4. Find the density of 2750 g of a substance that occupies 250 mL.
Punnett squares are used by geneticists to determine the probability of
different offspring genotypes.
Answer:
are used by geneticists to determine the probability of different offspring genotypes.
In class, we read an article about "Absolute Zero". Using what you know about particles/molecule motion, choose the option that best represents the explanation of what absolute zero is.
Answer:
Absolute zero is where the particles/molecules are not moving at all, meaning that there is no heat.
This means that the answer is:
1. All particles are moving and this movement allows us to measure the thermal energy of an object or substance. If the particles were able to completely stop moving this would be called reaching absolute zero.
Answer:
According to the options you gave, the answer is one
Explanation:
Absolute zero is defined by something being so cold the particles do not move
CAN YOU EXPLAIN?
How are waves different, and how do their differences
affect their characteristics?
What is the relationship between increase speed of a car and energy in a
collision?
Hello,
QUESTION)✔We have : Ek = 1/2m x v²In other words, when the speed doubles the collision energy of the car, or simply the kinetic energy, is multiplied by two.
Your in a car and you went 385
miles in 4 hours, how fast were
you going?
What is the speed of light in a medium if the index of refraction is 1.57?
Answer:
1.91 × 10⁸ m/s
Explanation:
[tex]n = \frac{c}{v} \\ 1.57 = \frac{3.0 \times {10}^{8} }{v} \\ v = 1.91 \times {10}^{8} \: ms {}^{ - 1} [/tex]
The speed of light in a medium if the index of refraction is 1.57 is 1.91 * 10⁸ m/s
The refractive index of a material is the ratio of speed of light in air to speed of light in the medium. It is given by:
Refractive index(n) = speed of light in air(c) / speed of light in material(v)
Given that n = 1.57, c = 3 * 10⁸ m/s, hence:
n = c/v
1.57 = 3 * 10⁸ / v
v = 1.91 * 10⁸ m/s
The speed of light in a medium if the index of refraction is 1.57 is 1.91 * 10⁸ m/s
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A sound wave passes from air into water and then into steel. With each change in medium, what happens to the speed of the
wave?
А
It increases
B
It decreases. C
It increases then decreases
D
It decreases then increases
Answer:
A
Explanation:
if its wronge im so sorry