Answers
Answer:
D, both A and B
Explanation:
2168 mV is the SI unit for potential difference and the Voltmeter.
The primary unit is Volt, represented as V. Due to the fact that there can be a much higher reading, or an even much more smaller one, comes the need for variants of the same unit.
10^-3 is called milli and represented as m
10^3 is called killo and represented as k
10^-6 is called micro and represented as µ
10^6 is called mega and represented as M
and even much higher variants of up to 10^12 and 10^-12
As we can see from the aforementioned example, 10^-3 is milli and represented as m
And our question gave us the unit in mV, which stands for millivolts.
Also, if we look at option B, it states, 2.168 volts. This 2.168 volts is also the same thing as A. Take a look at it this way, I said mV is 10^-3, right?
So, 2168*10^-3 is also 2168/100 which is 2.168. The only difference here is, once we make this conversion from mV, we have to drop the milli tag, because we have already made a conversion, and thus, leave it as V.
2168 mV = 2.168V
Hence why we picked option D, Both A & B as the right one
Related Questions
What are electromagnetic waves?
A:Waves that have different colors and can travel through
the emptiness of space.
B:Waves that can travel through the emptiness of space
very slowly
C:Waves that can travel through the emptiness of space
and stops when it gets close to the earth's
atmosphere.
D:Waves that can travel through the emptiness of space,
at the speed of light.
Answers
Answer:
Electromagnetic waves are waves which can travel through the vacuum of outer space. Mechanical waves, unlike electromagnetic waves, require the presence of a material medium in order to transport their energy from one location to another
Answer:
Electromagnetic waves are waves which can travel through the vacuum of outer space. Mechanical waves, unlike electromagnetic waves, require the presence of a material medium in order to transport their energy from one location to another
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Imagine a proton at rest a certain distance from a negatively charged plate. It is released and collides with the plate. Then imagine the similar case of an electron at rest, the same distance away, from a plate of equal and opposite charge. In which case would the moving particle have the greater speed when the collision occurs
Answers
Answer:
v_e »v_proton
Explanation:
To analyze which body has more energy, let's use the concepts of energy
starting point. Before releasing the particle
Emo = U = e V
final point.
Em_f = K = ½ m v²
energy is conservative
Em₀ = em_f
eV = ½ m v²
v² = 2eV / m
we see that the velocity of the body is inversely proportional to the mass of the atom.
For the present cao the mass of the proton is much greater than the mass of the electron
which
v_e »v_proton
2. For electric circuit shown in Figure find currents in each resistor.
Answers
The current flowing in the 2Ω and 1Ω is 1.14 A and the current flowing in the 3Ω and 4Ω is 0.286 A.
What is the current flowing in each resistor?The value of the current in each resistor is calculated by applying Kirchoff voltage law as follows;
The total voltage in loop 1 is calculated as;
2 + 4 - I₁R₁ - (I₁ - I₂)R₂ - I₁R₃ = 0
6 - 2I₁ - 3(I₁ - I₂) - 1₁ = 0
The current flowing in loop 2 is calculated as;
I = V/R
I₂ = ( 6 V - 4 V ) / (3 + 4)
I₂ = 0.286 A
The value of the current flowing in loop 1 is calculated as;
6 - 2I₁ - 3(I₁ - I₂) - 1₁ = 0
6 - 2I₁ - 3(I₁ - 0.286) - 1₁ = 0
6 - 3I₁ - 3₁ + 0.858 = 0
-6I₁ = -6.858
I₁ = 6.858 / 6
I₁ = 1.14 A
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Remember: Weight (newtons) = mass* gravity and 1 kg = 2.2 pounds. 14. A typical NFL lineman weighs around 314 pounds. Calculate the weight in Newtons.
Answers
1,401.88 N is the required weight of the man using the given conversion factor.
Determining the weight of an objectTo calculate the weight of a typical NFL lineman in Newtons, we need to first convert the weight from pounds to kilograms using the conversion factor of 1 kg = 2.2 pounds:
314 pounds ÷ 2.2 pounds/kg = 142.73 kg
Next, we can use the formula Weight (newtons) = mass * gravity, where gravity is approximately 9.81 m/s^2 (meters per second squared):
Weight (newtons) = 142.73 kg * 9.81 m/s^2 = 1,401.88 N
The required weight in Newton of the man is 1,401.88 N
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A patient prescribed a metered dose inhaler will find it
A. works for lower (not upper) respiratory diseases only.
B. should be filled with medication in aerosol form only.
C. is filled with medication used to administer a fixed amount of medication per inhalation through the mouth.
D. should be filled with medication in powder form only.
Answers
Answer:The correct answer should be C. is filled with medication used to administer a fixed amount of medication per inhalation through the mouth.
Explanation:
Answer:
c. is filled with medication used to administer a fixed amount of medication per inhalation through the mouth.
An object has an excess charge of −1.6 × 10−17 C. How many excess electrons does it have?
Answers
Given:
The charge on the object is
\(q=-1.6\times10^{-17}\text{ C}\)Required: Number of electrons
Explanation:
The number of electrons can be calculated using the quantization of charge
\(q\text{ = ne}\)Here, n is the number of electrons
e is the charge on the electron whose value is
\(e\text{ = -1.6}\times10^{-19}\text{ C}\)
On substituting the values, the number of electrons will be
\(\begin{gathered} n=\frac{q}{e} \\ =\frac{-1.6\times10^{-17}}{-1.6\times10^{-19}} \\ =100 \end{gathered}\)Final Answer: The object has an excess of 100 electrons.
TRUE OR FALSE in this experiment the effects of various reaction conditions on the speed or rate of reaction is studied. please indicate if the following statements regarding this experiment are true or false:
Answers
The statement "In this experiment, the effects of various reaction conditions on the speed or rate of reaction is studied" is TRUE.
This type of experiment is known as a kinetics experiment, where the goal is to study the factors that affect the rate of a chemical reaction.
These factors can include the concentration of reactants, the temperature of the reaction, the presence of a catalyst, and the surface area of the reactants.
By studying the effects of these various reaction conditions on the speed or rate of reaction, scientists can gain a better understanding of the mechanisms of chemical reactions and how to control them.
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Please help meeeeeeeeeee
Answers
Answer:
C
Explanation:
But I’m not quite sure
Please help 3. What is the best explanation of the image shown below?
O A. The ball was pitched at orbital velocity.
O B. The ball was pitched at more than orbital velocity but less than escape velocity.
O c. The ball was pitched at escape velocity.
D. The ball was pitched at more than escape velocity
Answers
Answer:
A
Explanation: took the test
any help here please ???
Answers
Answer:
16 reflection,incidence
The Olympic record for the men's 400-meter hurdle race is 45.94 seconds. It was set by Karsten Warholm in 2021. His average running speed was 400 = 45.94 28.71 meters per second (distance divided by time equals speed) 1. Make a table and a graph showing how 400 meter race time changes as average speed increases from 2 meters per second to 10 meters per second in steps of one meter per second (in other words, the speed column should go 2, 3, 4, --. 10). Also remember that distance is equal to rate (or speed) times time. d=yt 2. Describe the pattern of change shown in your table and graph 3. Write a rule (equation) showing how to calculate race time, t. for any average speed, s. 4. Which change in speed will reduce rate time the most an increase from 2 to 4 meters per second or an increase from 8 to 10 meters per second? Explain how your answer is illustrated in the shape of your graph.
Answers
We are given a distance of 400 meters and we are asked to determine the time to cover this distance for different values of speed. Since we are asked to construct a table, we begin by setting up a column with values of speed that range from 2 meters per second to 10 meters per second, like this:
Now we need to set up another column with the values for time. To do that we will use the fact that the speed is defined as:
\(v=\frac{d}{t}\)Where "v" is speed, "t" is time, and "d" is distance. We can solve for the distance by multiplying both sides by "t":
\(vt=d\)Now we divide both sides by "v":
\(t=\frac{d}{v}\)Now, since the distance is fixed at 400 meters we can replace this value in the equation:
\(t=\frac{400}{v}\)Now we have a relationship that will allow us to determine the value of the time. We just need to replace each of the values on the column for speed into the equation to get the value for the time. Replacing the first value of speed we get:
\(t=\frac{400\text{ m}}{2\text{ m/s}}=200s\)This is the first value for the column of time. The second value is obtained replacing the second value for the speed:
\(t=\frac{400\text{ m}}{3\text{ m/s}}=133.3s\)This is the second value. We continue like this for each of the values and we get the following table:
Now we can plot these values and we obtain the following graph:
3. The rule to calculate race time "t" for any average speed is the one that was determined previously to construct the table, this is:
\(t=\frac{400}{s}\)4. we are asked about the change in time given a change in speed. We can calculate this by subtracting the initial time from the initial speed from the final time at the final speed, this is:
\(\Delta t=t_{v2}-t_{v1}\)Where:
\(\begin{gathered} \Delta t\text{ = change in time} \\ t_{v1}=\text{ time at velocity 1} \\ t_{v2}=\text{ time at velocity 2} \end{gathered}\)Now, the change from 2 to 4 meters per second is the following:
\(\begin{gathered} t_2=200 \\ t_4=100 \end{gathered}\)replacing we get:
\(\Delta t_{2-4}=100-200=-100\)Therefore, the time is reduced in 100 seconds. Now for an increase from 8 to 10 meters per second we get:
\(\begin{gathered} t_8=50 \\ t_{10}=40 \end{gathered}\)Replacing in the formula for change:
\(\Delta t_{8-10}=40-50=-10\)therefore, the time is reduced in 10 seconds. This means that the change from 2 to 4 meters per second will reduce the race time the most. This can be illustrated in the graph as it gets flatter the greater the speed is, meaning that the changes in time are reduced.
Ajani is trying to experimentally measure Planck's constant h. He does this by shining different wavelengths of monochro- matic (i.e., single-wavelength) EM radiation on a metal plate with unknown work function W, and then measuring the stop- ping voltage required to bring the ejected electrons to a halt. When he uses λ1= 400 nm, he finds that a stopping voltage of V1 = 0.7 V is required. When he uses λ2 = 500 nm, he finds that a stopping voltage of V2= 0.2 V is required. Based on these two data points, what is Ajani's measurement of Planck's constant?
Answers
Answer:
h = 1.01 x 10⁻³⁴ J.s
Explanation:
The energy applied by the voltage must be equal to the energy associated with the wavelength of light:
\(eV = \frac{hc}{\lambda}\\\)
where,
e = charge on electron = 1.6 x 10⁻¹⁹ C
V = stopping potential
h = Planck's Constant = ?
c = speed of light = 3 x 10⁸ m/s
λ = wavelength of light
For λ = 400 nm = 4 x 10⁻⁷ m, V = 0.7 V:
\((1.6\ x\ 10^{-19}\ C)(0.7\ V) = \frac{h(3\ x\ 10^8\ m/s)}{4\ x\ 10^{-7}\ m}\\\)
h = 1.49 x 10⁻³⁴ J.s
For λ = 500 nm = 5 x 10⁻⁷ m, V = 0.2 V:
\((1.6\ x\ 10^{-19}\ C)(0.2\ V) = \frac{h(3\ x\ 10^8\ m/s)}{5\ x\ 10^{-7}\ m}\\\)
h = 0.53 x 10⁻³⁴ J.s
Taking average of both values:
\(h = \frac{(0.53+1.49)\ x\ 10^{-19}\ J.s}{2}\)
h = 1.01 x 10⁻³⁴ J.s
a What is meant by zero error?
b Give an example of when you would have to allow
for it.
Answers
a) It is the error present in the measuring instrument that causes it to register a value even when there is no input or output being measured.
b) An example of when you would have to allow for zero error is when using a measuring instrument like a vernier caliper or micrometer screw gauge.
a) Zero error refers to the deviation or discrepancy in the measurement instrument, where the indication or reading on the instrument is not zero when the quantity being measured is zero. In other words, it is the error present in the measuring instrument that causes it to register a value even when there is no input or output being measured.
Zero error can occur due to various reasons such as manufacturing defects, wear and tear, misalignment, or improper calibration of the instrument. It can be positive or negative, depending on whether the instrument reads higher or lower than the actual value.
b) An example of when you would have to allow for zero error is when using a measuring instrument like a vernier caliper or micrometer screw gauge. These instruments are commonly used to measure the dimensions of objects with high precision.
In a vernier caliper, for instance, zero error can occur when the jaws do not close perfectly when there is no object being measured. If the caliper shows a reading other than zero when the jaws are closed, it indicates the presence of zero error.
To obtain accurate measurements, the zero error needs to be accounted for and compensated. This can be done by adjusting the position of the zero on the scale or by subtracting the zero error value from the measured readings.
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Select which of the following is (are) the correct unit(s) for energy?
Answers
Joule (J). This is the fundamental energy unit of the metric system, or the International System of Units in a later, more thorough version (SI).
What does "energy unit" mean?The SI unit of energy, the joule (J), was created in honour of James Prescott Joule and his research on the mechanical equivalent of heat since energy is defined through labour. In terms of SI base units, 1 joule is equivalent to 1-newton metre and, in slightly more basic words.
What is the formula for the energy SI unit?Potential energy, which can be calculated using the formula P.E. = mgh. Unit is the energy that an object has stored due to its position and height. Joules is the SI unit for energy (J).
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How is sound produced? Name its three
characteristics.
Answers
Answer:
1.loudness
2.pitch
3.shrillness
For your senior project, you would like to build a cyclotron that will accelerate protons to 10% of the speed of light. The largest vacuum chamber you can find is 54 cm in diameter. What magnetic field strength will you need?
Answers
Answer:
The magnetic field is 1.16 T.
Explanation:
speed, v = 10% of speed of light = 3 x 10^7 m/s
diameter, d = 54 cm
radius, r = 0.27 m
charge, q = 1.6 x 10^-19 C
mass, m = 1.67 x 10^-27 kg
Let the magnetic field is B.
The centripetal force is balanced by the magnetic force.
\(qvB=\frac{mv^2}{r}\\\\B =\frac{mv}{qr}\\\\B =\frac{1.67\times 10^{-27}\times 3\times 10^{7}}{1.6\times 10^{-19}\times 0.27}\\\\B =1.16 T\)
Conclude what happens to the speed of light when it passes from a medium of low index of refraction into a medium of high index of refraction? Justify your statement using the data you have collected
Answers
The thing that happens to the speed of light when it passes from a medium of low index of refraction into a medium of high index of refraction is that it tend to speed up.
Why does it speed up?Light moves more quickly when it enters a medium with a lower refractive index, as air from water. The light deviates from the straight line. Light will move more slowly and obliquely as it penetrates a substance with a higher refractive index.
The speed of light increases with decreasing refractive index. The lesser refractive index belongs to medium A. When moving at a speed equal to the speed of light divided by the refractive index, light will move more quickly through medium A.
Hence, Light bends in the direction of the normal as it passes through an interface into a medium with a greater index of refraction. On the other hand, light bending away from an interface from higher n to lower n.
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Using the formula at the beginning of this lesson, calculate the wavelength of a signal from KPhET 98.7. Remember that FM stations transmit in the Megahertz range. This means that KPhET is transmitting a frequency of 9.87 x10∧7 hz. What is the wavelength of the signal from this radio station?
Answers
Answer:
3.04 m ???
Explanation:
The wavelength of the signal from KPhET 98.7 radio station is 3.05 meter.
What is electromagnetic wave?EM waves are another name for electromagnetic waves. When an electric field interacts with a magnetic field, electromagnetic waves are created. These electromagnetic waves make up electromagnetic radiations.
It is also possible to say that electromagnetic waves are made up of magnetic and electric fields that are oscillating. The basic equations of electrodynamics, Maxwell's equations, have an answer in electromagnetic waves.
As radio wave is electromagnetic wave, the speed of radio wave is 3.0×10⁸ m/s.
Given frequency of KPhET is 9.87 x10⁷ Hz.
Hence, the wavelength of the signal from this radio station is = ( velocity ÷ frequency)
= 3.0×10⁸ m/s ÷ 9.87 x10⁷ Hz.
= 3.05 meter.
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Can toe touches help you improve flexibility? Yes/No
Answers
Answer:
Yes. It helps so you can be able to do harder things like backflips and stuff like that. And to become more flexible.
Explanation:
A hungry rabbit sprints... what is the average velocity of the rabbit between the times t = 2 s and t = 12 s
Answers
Answer: -0.10m/s
Explanation:
khan academy
an object of mass 4kg moving with initial velocity if 20m/s accelerates for 10s and attaind a final velocity of 60m/s calculate the acceleration
Answers
Answer:
given us,
mass= 4×9.8gm m(9.8) formula
= 39.2
final velocity (v)= 60m/s
initial velocity (u)= 20m/s
time(t)= 10s
acleration(a)=?
now,
accleration(a)= v-u/t=60- 20/10
=40/10
=4m/s
:. the acceleration is 4 m/s
Explanation:
first we have to calculate mass and we can use acceleration formula
which of the following changes will increase the frequency of an oscillating pendulum?
a. an increase in the mass of the pendulum.
b. an increase in the initial height of release.
c. an increase in the length of the rope.
d. more than one of the above
e. none of the above
explain your answer in your own words.
NO LINKS.
Answers
Answer:
b (i think)
Explanation:
4. A car travels at a speed of v = 54 km/h. During emergency braking, the wagon decelerates (brakes) with a deceleration (braking) of 3m/s per second. a) Convert the speed into the unit m/ s.b) Calculate how long the braking lasts. c) Sketch the v-t diagram and calculate the braking distance!
Answers
The given velocity is 54km/hr, which, when converted to m/s using 1km = 1000m and 1 hour = 3600 seconds, equals 15m/s.
How to calculate distance?Now substitute the initial speed u = 15m/s values.
v = 0m/s as the final velocity
Time is 6 seconds.
In the a= -3 m/ s2 equation,
s= ut + 1/2at2 s= 15 6+ 1/2(-3)(6)2 s= 90-45 s = 45m
As a result, after using the brakes, the car will halt for up to 45 meters.
The inverse of acceleration is deceleration. The deceleration will be calculated by dividing the final velocity minus the initial velocity by the time required for the velocity drop.
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35 A long-jumper had a take-off velocity of 9.5 m/s. What is the maximum possible horizontal distance the man can jump? [Answer = 9.21 m]
Answers
Answer:
9.21 m
Explanation:
because this is the answer
2. Gerard is riding his bicycle directly east. His maximum
instantaneous velocity was 8 meters per second and his
minimum instantaneous velocity was 0 meters per second. He
covered 7.20 kilometers in 20.0 minutes. What is his average
velocity for the ride?
Answers
Gerard's average velocity for the ride is 6 meters per second.
To find Gerard's average velocity for the ride, we can use the formula:
Average velocity = Total displacement / Total time
First, we need to convert the distance traveled from kilometers to meters:
7.20 kilometers * 1000 = 7200 meters
Next, we convert the time from minutes to seconds:
20.0 minutes * 60 = 1200 seconds
Now, we can calculate the total displacement by subtracting the initial position from the final position. Since Gerard is riding directly east, there is no change in the east-west direction, so the displacement is equal to the distance traveled:
Total displacement = 7200 meters
Finally, we substitute the values into the average velocity formula:
Average velocity = 7200 meters / 1200 seconds
Average velocity = 6 meters per second
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sound waves have a frequency of 1000 hz what is their period?
Answers
Answer:
Solve it
Explanation:
The formula for time is: T (period) = 1 / f (frequency). λ = c / f = wave speed c (m/s) / frequency f (Hz). The unit hertz (Hz) was once called cps = cycles per second.
Consider a fusion reaction in which a proton fuses with a neutron to form a deuterium nucleus. How much energy is released in this reaction?(The mass of the deuterium nucleus is 2.01355u). Answer in Me
Answers
The difference in mass is then 2.01649u - 2.01355u = 0.00294u. This means that the energy released in this reaction is equal to 0.00294u × (c^2) = 4.621 x 10^-12 J.
What is mass?
Mass is a measure of the amount of matter an object contains. It is different from weight, which is a measure of the force gravity exerts on an object. Mass is typically measured in kilograms (kg) or grams (g).
The energy released in this reaction is equal to the mass difference between the products and the reactants multiplied by the speed of light squared. In this reaction, the mass of the reactants (1 proton and 1 neutron) is equal to 1.007825u + 1.008665u = 2.01649u.
The mass of the product (deuterium nucleus) is 2.01355u.
This means that the energy released in this reaction is equal to 0.00294u × (c^2) = 4.621 x 10^-12 J.
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The Earth's plates moved over millions of years, bringing continents and other
features of the Earth to their present arrangement.
How is this movement of the lithosphere explained?
continental drift
• the principle of superposition
• the theory of plate tectonics
nuclear fusion
Answers
Answer:
theory of plate tectonics
Explanation:
Answer:
What he said above me
Explanation:
I did the test and it was right
which two technologies use reflected sound waves
Answers
Answer:
looh. If you have ever heard an echo, you'll be familiar with the basic principle behind three similar technologies: radar, sonar and lidar. An echo is the reflection of sound waves off of some distant object.
Explanation:
From Goog|e
Answer:
Sonar and Ultrasound are reflected sound wave technologies.
Explanation:
Sonar- is a technology that was developed by the U.S. Navy to navigate and detect underwater objects. A ship emits a sound wave in the direction of a certain object. It then measures the amount of time it takes the sound wave to return. Knowing how fast a sound wave travels lets you calculate how far away the object is. This technique is used to create maps of the ocean floor. It is also used to detect submarines and other submerged objects.
Ultrasound- Ultrasound devices work in a way very similar to sonar. They emit sound waves that are reflected by tissues in the body. The amount of time it takes for the reflected sound waves to return to the machine allows the machine to produce an image of a part of the body.
The reason the answer is not also radar (Although radar is a reflected sound wave), is because Radar is a radio wave. The question is asking to name reflected sound wave technologies not radio wave.
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A car C moving with a speed of 65 km/h on a straight road is ahead of motorcycle M moving with the speed of 80 km/h in the same direction. What is the velocity of M relative to A?
Answers
Answer:
The answer is 15. Step by step is you times 80 by 65 and then you divided by 2 and you call your teacher