Answers
Here,
potential difference(V)= (2.00±0.02) V;
current (I)=( 5.3 ± 0.1) mA;
Resistance (X) will be given by
[tex]\begin{gathered} X=\frac{V}{I}; \\ X=\text{ }\frac{2.00±0.02}{5.3±0.1}\text{ }\times1000\begin{cases}V={(2.00±0.02)} \\ I=({5.3±0.1\text{ \rparen mA= \lparen5.3}\pm0.1)\times10^{-3\text{ }}}A\end{cases} \\ \\ \therefore X=(\text{ 377.358 }\pm0.001) \\ \text{ } \\ \end{gathered}[/tex]Related Questions
The outer ear _____ sound waves
Answers
According to the research, the correct term to complete the statement is collect. The outer ear collects sound waves.
What is the outer ear?It is a structure that captures or collects sound or sound vibrations before channeling them to the middle ear.
In this sense, it is made up of the pinna that projects from the side of the head and the external auditory meatus that automatically amplifies sounds that pass inward to the tympanic membrane.
Therefore, we can conclude that the outer ear captures sound waves and conducts them to the middle ear, thus the correct term is collect.
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A stunt performer falls off a wall that is 3.1 m high and then lands on a mat.
What is his impact velocity?
Answers
Answer:7.8 M/s
Explanation:
A rocket toy moves straight upward, starting from rest with an acceleration of 4 m/s2. It runs out of fuel at the end of 10 s and continues to coast upward, reaching a maximum height before falling back to earth
a. Find the rocket’s velocity and position at the end 10 s
B. Find the velocity before the rocket crashes on the ground
C. Find the time flight of rocke
Answers
The density of mercury is 13600 kgm-3. So, the relative density of mercury is A. 13.6 B. 1.36 C. 136
Answers
The density of water is,
[tex]d_w=1000kgm^{-3}[/tex]The density of mercury is,
[tex]d_m=13600kgm^{-3}[/tex]The relative density of mercury is the density of mercury concerning the density of water.
Thus, the relative density of mercury is,
[tex]\begin{gathered} \frac{d_m}{d_w}=\frac{13600}{1000}_{} \\ \frac{d_m}{d_w}=13.6 \end{gathered}[/tex]Hence, option A is the correct answer.
A spherical specimen of the mineral chalcopyrite measures 3.9 cm in diameter and has a mass of
129.67 g. What is its specific gravity?
Answers
A spherical specimen of the mineral chalcopyrite measures 3.9 cm in diameter and has a mass of 129.67 g, its specific gravity is 4.17g/cm³
What is specific gravity?The ratio of a substance's density to that of a reference substance is its specific gravity, also known as relative density.
Water, which has a density of 1.0 kg/litre at 4 °C (39.2 °F), serves as the standard of comparison for solids and liquids (62.4 pounds per cubic foot).
Dry air, which is frequently used as a comparison point for gases, has a density of 1.29 grams per litre (1.29 ounces per cubic foot) under what are known as "standard conditions" (a temperature of 0 °C and a pressure of 1 standard atmosphere).
As an illustration, the specific gravity of liquid mercury is 13.6 due to its density of 13.6 kg per litre. The density of the gas carbon dioxide, which is 1.976 grams per liter under ideal conditions, translates into a specific gravity of 1.53 (= 1.976/1.29).
The formula for specific gravity is given by
specific gravity = density of the object / density of the water
Here given that a spherical specimen of the mineral chalcopyrite measures 3.9 cm in diameter and has a mass of 129.67 g
Then its volume is
Volume of sphere = [tex]{\frac {4}{3}}\pi r^{3}[/tex]
Substituting the values we get
V = [tex]{\frac {4}{3}}\pi (\frac{3.9}{2} )^{3}[/tex]
= 31.06 cm³
Density = Mass/Volume
Density of mineral chalcopyrite = 129.67g / 31.06 cm³
= 4.17 g/cm³
Now, we can finally calculate specific gravity
specific gravity = 4.17 g/cm³ / 1g/cm³ (Density of water is 1m/1V)
= 4.17g/cm³
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H3C- CH2-CH2-CH2-CH3name formula HC/// C-CH2-CH3name formula
Answers
1.
The number of the carbon atom is five. All the carbon atom is single-bonded.
The formula name of the above is Pentane.
The number of the carbon atom is four. All the carbon atom is single-bonded except one triple bond at the first place.
The formula name of the above is 1-butyne.
1.The water in the plumbing in a house is at a gauge pressure of 74,000 Pa. What force does this cause on the top of the tank inside a water heater if the area of the top is 0.38 m2?
Answers
Given:
The pressure inside the tank, P=74000 Pa
The area of the top of the tank, A=0.38 m²
To find:
The force exerted on the top of the tank.
Explanation:
The pressure can be described as the force exerted per unit area.
Thus the pressure inside the tank is given by,
[tex]P=\frac{F}{A}[/tex]Where F is the force exerted on the top of the tank.
On substituting the known values,
[tex]\begin{gathered} 74000=\frac{F}{0.38} \\ \implies F=74000\times0.38 \\ =28120\text{ N} \end{gathered}[/tex]Final answer:
Thus the force exerted on the top of the tank is 28120 N
If the slope of a position versus time graph is negative, what does that imply about the motion of an object? A. The object has a negative acceleration. B. The object turned around. C. The object is moving in the negative direction. D. All of the above
Answers
ANSWER
A. The object has a negative velocity
EXPLANATION
We want to describe the slope of a position-time graph that is negative.
If the slope of a position-time graph is negative, it implies that the velocity is also negative. In other words, as time increases, the velocity also decreases.
As velocity decreases, it implies that the acceleration also decreases.
Therefore, we have that the acceleration of the object is negative.
The answer is option A.
It takes a continent approximately 250,000,000 years to move half-way around Earth, a distance of about 19,200 km or 1,920,000,000 cm. The speed of the continent in what per what can be found by dividing 1,920,000,000 cm by 250,000,000 years.
Answers
The speed of the continent is found to be 7.68 centimeters per hour when 1920000000cm is divided by 250000000years.
The distance travelled by the continent is 1920000000cm.
The time taken by the continent to complete its path is 250000000.
The speed S of the body,
S = D/T
Where,
D is the distance travelled by the body,
T is the time taken by the body to cover that distance.
The speed S of the continent is,
S = D/T
S = 1920000000cm/250000000year
S = 7.68 cm/year
Hence, the speed of the continent is 7.68 centimeters per year.
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Who exhibits more power?A) Bob transfer 2000 J in 3 minutes.B) Carl transfers 2 J in 0.1 s.C) Alan transfers 20 J in 0.5 s.
Answers
Given that:
A) Energy,
[tex]E_B=\text{ 2000 J}[/tex]The time is
[tex]\begin{gathered} t_B=3\text{ min} \\ =3\times60\text{ s} \\ =180\text{ s} \end{gathered}[/tex]B) Energy,
[tex]E_C=2\text{ J}[/tex]and time
[tex]t_C=0.1\text{ s}[/tex]C) Energy
[tex]E_A=20\text{ J}[/tex]and time
[tex]t_A=0.5\text{ s}[/tex]
We have to find the power for all three cases.
The formula to calculate power is
[tex]P=\frac{E}{t}[/tex]The power transferred by Bob will be
[tex]\begin{gathered} P_B=\frac{E_B}{t_B} \\ =\frac{2000}{180} \\ =11.11\text{ W} \end{gathered}[/tex]The power transferred by Carl will be
[tex]\begin{gathered} P_C=\frac{E_C}{t_C} \\ =\frac{2}{0.1} \\ =20\text{ W} \end{gathered}[/tex]The power transferred by Alan will be
[tex]\begin{gathered} P_A=\frac{E_A}{t_A} \\ =\frac{20}{0.5} \\ =40\text{ W} \end{gathered}[/tex]Thus, Alan exhibits more power.
1. A sound engineer has set up his mixing equipment a distance from an outdoor band shell.She claps her hands and hears the echo 0.250 s later. If the speed of sound was 340.0m/s, how far from the wall was she?
Answers
Given
Hears the echo at , t=0.250 s
Speed pf sound is v=340 m/s
To find
The distance from the wall
Explanation
let her distance from the wall be d.
When she hears the echo, the sound has travelled the same distance twice
So
[tex]\begin{gathered} v=\frac{2d}{t} \\ \Rightarrow340=\frac{2d}{0.250} \\ \Rightarrow d=d=42.5\text{ m} \end{gathered}[/tex]Conclusion
The distance of the wall from her is 42.5 m
Density of iron is 7860 Kg/m^3 what is the mass of iron sphere whose diameter is 0.5 m?
Answers
The mass of the given iron sphere of diameter 0.5 m is 510.9 kg
Density of the iron sphere = 7890 kg/m³
Diameter of the iron sphere = 0.5 m
Radius of the iron sphere = 0.25m
The formula to find the mass of the iron sphere is
ρ = m / v
where ρ is the density
m is the mass
v is the volume.
So , to find the mass , we need to know the volume of the sphere
Volume of the sphere = 4/3 πr³
Let us substitute the value of r in the above equation,
V = 4/3 x 3.14 x (0.25)³
= 4/3 x 3.14 x 0.0156
= 0.196/3
V = 0.065 m³
So , now let us find the mass of the given sphere
ρ = m / v
m = ρv
m = 7860 x 0.065
m = 510.9 kg
Therefore , the mass of the given iron sphere is 510.9 kg
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An object is formed by attaching a uniform, thin rod with a mass of mr = 8kg and length L = 6 m to a uniform sphere with mass ms = 36.25 kg and radius R = 1.5m.1) What is the moment of inertia of the object about an axis at the left end of the rod?
Answers
ANSWER:
2167.68 kg*m^2
STEP-BY-STEP EXPLANATION:
Given:
mr = 8 kg
L = 6 m
ms = 36.25 kg
R = 1.5 m
Moment of inertia of sphere about its center is:
[tex]I_{CM}=\frac{2}{5}m_s\cdot R^2[/tex]Using paraller theorem, moment of inertia of shpere about end of rop is:
[tex]I_{\text{rod}}=m_s\cdot(R+L)^2+\frac{1}{3}m_r\cdot L^2[/tex]Therefore:
[tex]\begin{gathered} I=I_{cm}+I_{\text{rod}}_{} \\ I=\frac{2}{5}\cdot m_s\cdot R^2+m_s\cdot(R+L)^2+\frac{1}{3}\cdot m_r\cdot L^2 \end{gathered}[/tex]Replacing:
[tex]\begin{gathered} I=\frac{2}{5}\cdot36.25\cdot1.5^2+36.25\cdot(1.5+6)^2+\frac{1}{3}\cdot8\cdot6^2 \\ I=2167.69\text{ kg}\cdot m^2 \end{gathered}[/tex]The moment of inertia is 2167.68 kg*m^2
Which planets in our solar system revolve the fastest? and Why?
A. The gas giant planets
B.Planets closest to the Sun
C. Planets farthest from the Sun
D. All planets revolve at the same speed
Answers
Lesson 3
Write a descriptive essay about the basic steps of the scientific method.
Include the following essential content:
Testable hypothesis
Data collection and analysis
Peer review
Also, include where theories fit into the process of the scientific method.
Answers
A sample descriptive essay about the basic steps of the scientific method is given below:
When a person is testing a hypothesis, it is important that he collects data and then makes an analysis of it, and puts it through a controlled experiment at the lab.
Next, he would have to peer-review the results of the experiments and when this is confirmed, it becomes a theory,
What is the Scientific Method?This refers to the process of systematic observation that is used to come to a conclusion in a scientific investigation.
Hence, we can see that the descriptive essay about the scientific method is given above,.
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When you drop a 0.38 kg apple, Earth exerts a force on it that accelerates it at 9.8 m/s2 to- ward the earth’s surface. According to New-
Answers
Answer:
At the surface it is defined by 9.80665 m/s2.
Alex tickles his brother by stroking adjacent ________ spots on his skin.
Answers
Answer:
adjacent flat spots on his skin
Answer:
You didn't provide answer choices but I'd assume it's pressure.
Calculate the amount of charge that flows past a cross-sectional area of a conductor if a current of 0.2 A flows in it for 1 minute?
Answers
Answer:
12C
Explanation:
q = It
where q is the charge in coloumbs (c)
I is the current in amperes (A)
t is the time in seconds (s)
q = 0.2× 60 (1 minute is 60seconds)
q= 12C
Question 11
5 pts
Gas Laws: A balloon is carefully filled with one breath of air (about 500ml) underwater at
a depth of 100ft, then tied shut. At this depth, the balloon is under 4 atmospheres of
pressure. Assuming negligible compression by the rubber of the balloon, what is the
volume of the air (in m³) once the balloon rises to the surface of the water and
experiences 1 atm of pressure? Modify the Ideal Gas Law to solve this conservation
problem.
1 Liter 0.001 Cubic Meter
1 atm = 1.01x 105 Pascals
Answers
The volume of the gas once it reaches the surface of water is 2 liters.
The volume of the air in balloon at depth of 100ft (30m) is 500ml.
The pressure at this point is 4 atm.
Assuming that the balloon have no compression by rubber of balloon the volume of air at the water surface is V.
The pressure at the surface of water is 1 atms.
As we know, from the ideal gas equation,
PV = nRT
Where,
P is the Pressure of gas,
V is the volume of the gas,
n is the number of moles,
R is the gas constant whose value is 0.082057 L atm mol-1 K-1,
T is the temperature.
Assuming that the temperature is constant,
We know,
PV = nRT
All quantities on the right side are constants,
So, we can write,
P₁V₁ = P₂V₂
Putting all the the values,
4(0.5) = 1V₂
V₂ = 2 Liters.
The volume of the air at the surface is 2 liters.
1 liter = 0.001 m
Hence,
2 liters = 0.002 m³
So the volume of air at the surface is 0.002m³.
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On a plot of angular position versus time t for the rotation of a disk, what corresponds to the disk’s angular velocity at any given instant t1?
a. inverse of the slope at the point on the plot corresponding to t1
b. intercept on the vertical axis
c. slope at the point on the plot corresponding to t1
d. intercept on the horizontal axis
Answers
Option d i.e; Slope at the point on the plot corresponding to t1 corresponds to disk's angular velocity at any given instant t1.
The angular velocity (w), a vector quantity in uniform circular motion, is determined by dividing the angular displacement (Δ), also a vector quantity, by the change in time (Δt). Speed is equal to |w|R and is calculated by dividing the arc length travelled (S) by the change in time (Δt).
Examples of angular velocity include a roulette ball on a wheel, a race car travelling in a circle, and a Ferris wheel. In addition, the object's angular displacement with respect to time is represented by the angular velocity of the object.
Because it is practical, angular velocity is perpendicular. Because all they are is a magnitude and a direction, a vector cannot be curved. In order to represent the rotational direction, we use the direction perpendicular to the plane.
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An asteroid is moving along a straight line. A force acts along the displacement of the asteroid and slows it down. The asteroid has a
mass of 5.8x 104 kg, and the force causes its speed to change from 6800 to 5600m/s. (a) What is the work done by the force? (b) If the
asteroid slows down over a distance of 2x 106 m determine the magnitude of the force.
Answers
The work done on the asteroid by the constant force is 4.06 × 10¹¹ joules and the force experienced by the asteroid is 1.89 × 10⁵ newtons
what is work energy theorem?
work energy theorem is an important phenomenon in physics which states that the change in kinetic energy is equal to the work done by the object.
This law is basic part of conservation of energy.
what is newtons law of motion?
Newton's laws of motion are three basic laws of classical mechanics that describe the relationship between the motion of an object and the forces acting on it. These laws can be paraphrased as follows: A body remains at rest, or in motion at a constant speed in a straight line, unless acted upon by a force.
given:
mass of the asteroid = 5.8 x 10⁴ kg
initial speed of the asteroid v₁ = 6800m/s
final speed of the asteroid v₂ = 5600 m/s
displacement of the asteroid = 2 × 10⁶ meters
a)
using work energy theorem for the asteroid we get,
work done = change in kinetic energy
work done = 1/2 × m × (v₂) ² - 1/2 × m × (v₁) ²
work done by the force on the asteroid is = 1/2 × 5.8 x 10⁴ (1.4 × 10⁷)
work done by the force on the asteroid is = 4.06 × 10¹¹ joules
b)
first, we will have to find the acceleration of the asteroid,
using newtons third law of motion we get,
a = 14/4
a = 3.5 m/s²
therefore, the force can be calculated using relation f = m × a
here,
m is mass
a is acceleration
therefore, the force on the asteroid is = 5.8 x 10⁴ × 3.5
the force on the asteroid is = 1.89 × 10⁵ newtons
therefore, the work done on the asteroid by the constant force is 4.06 × 10¹¹ joules and the force experienced by the asteroid is 1.89 × 10⁵ newtons
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The cubic expansivity of mercury is 1.8×10^-4K^-1 and the linear expansivity of glass is 8.0×10^-6K^-1, calculate the apparent expansivity of mercury in a glass container?
Answers
Therefore,
[tex]Apparent\text{ cubic expansivity=}real\text{ cubic expansivity - cubic expansivity of the container}[/tex][tex]\begin{gathered} \text{ cubic expansivity of the container =3(}8.0\times10^{-6})=24\times10^{-6}=2.4\times10^{-5} \\ \text{note we converted linear expansivity to cubic expansivity} \end{gathered}[/tex]Finally,
[tex]\text{Apparent cubic expansivity=}1.8\times10^{-4}-2.4\times10^{-5}=1.56\times10^{-4}K^{-1}[/tex]What if you had a leak in the refrigerant line. Explain in terms of energy and pressure and temperature.
Answers
The most frequent HVAC crises are gas leaks, clogged drain lines, electrical problems, refrigerant leaks, and problems with ventilation.
What happens if you have a refrigerant leak?Your system could not cool as effectively as it should due to refrigerant leakage. Your system can have trouble producing enough air cooling, which would keep your house from reaching the target temperature. This can lead to an increase in your monthly energy costs and makes your system work harder.Your system could not cool as effectively as it should due to refrigerant leakage. Your system can have trouble producing enough air cooling, which would keep your house from reaching the target temperature. This can lead to an increase in your monthly energy costs and makes your system work harder.The most frequent HVAC crises are gas leaks, clogged drain lines, electrical problems, refrigerant leaks, and problems with ventilation.To learn more about : Refrigerant
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The plow was an important invention for the Sumerian civilization because it:
A. made it easier for farmers to prepare land for farming.
B. simplified communication with other cultures.
C. allowed important information to be recorded.
D. protected city-states from foreign invaders.
I am in the middle of the test help pls
Answers
The plow was an important invention for the Sumerian civilization because it made it easier for farmers to prepare land for farming.
The plow made farming more efficient for the Sumerians, as people no longer had to waste time planting food by hand. The cart allowed people to carry goods back and forth from different civilizations in a much easier way as people did not have to carry the goods on their backs.
It is estimated that the ancient Sumerians invented the plow. The plow was designed to utilize domestic animals as a means of easing the workload on farmers. Oxen were harnessed to a wooden plow and pulled it through the fields to loosen the soil for easier planting of crops.
Plow, also spelled plough, most important agricultural implement since the beginning of history, used to turn and break up soil, to bury crop residues, and to help control weeds.
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**NEED USEFUL ANSWER ASAP, H.W QUESTION**
Given that hotter blackbodies produce more energy than cooler blackbodies, why do cooler red giants have much higher luminosities than much hotter white dwarfs?
Answers
Given that hotter blackbodies produce more energy than cooler blackbodies, cooler red giants have much higher luminosities than much hotter white dwarfs.
The hotter blackbodies emits more light as compared to the cooler blackbodies over all the wavelength. A blackbody emits light over all wavelength. the red giant is a star , hydrogen is fused to helium core to stat the fusion reactions. this hydrogen fusion caused the star to expand. the sun becomes red giant it will swell up to size of earth orbit. This gives a red color and make red giant much hotter. while the white dwarf comes after the red giant . white dwarf is also very hot but it is not hot enough to star fusion reaction in carbon and oxygen.
Thus, Given that hotter blackbodies produce more energy than cooler blackbodies, cooler red giants have much higher luminosities than much hotter white dwarfs.
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Which of the following sources is most likely to be free of bias? OA. Textbook OB. Blog post c. Diary D. Video interview
Answers
Answer:
Textbook
Explanation:
Pretty obvious thi :v
Answer:
OA
Explanation:
Text books are often reviewed by experts hence, is likely to be biased.
What is the impulse of a car hitting another car if it's initial velocity was 50m/s
and it's velocity after hitting it is 4.4m/s? The car weighs 2168kg.
J=A P
AP=mvf-mvi
Answers
The impulse of the car after hitting is 98860.8 kg.m/s
In physics, the term "impulse" is used to characterize or measure the impact of force operating gradually to alter an object's motion. It is often stated in Newton-seconds or kilograms per second and is denoted by the symbol J.
J = m ( v-u)
where, m = 2168 kg
u = 50 m/s
v = 4.4 m/s
J = 2168 ( 4.4 - 50)
J = 2168(45.6)
J = 98860.8 kg.m/s
since the final velocity is decreasing the impulse is a vector term thus a negative sign will also be included in this.
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Simpson s drives his car with an average velocity of 85 km/h eastward how long will it take him to drive 560 km on a perfectly straight highway?
Answers
Simpson will it take 112 / 17 km to drive 560 km on a perfectly straight highway.
What relationship does speed have with distance?You can replace this computation with d = rt, which stands for "distance equals rate times time." To calculate speed or rate, use the speed formula, s = d/t, which asserts that speed is equal to distance divided by time.
The difference between speed and velocity is the amount of distance an object covers in a given amount of time and in a certain direction. Speed is a scalar quantity while velocity is a vector.
We know that:
v = 85
d = 560
Substitute
v = 85
d = 560 into formula d = v x t :
560 = 85t
Cross out the common factor: 112 / 17 km
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The final stage of reduction of pressure in a regulator is to how many PSIG
Answers
The final stage of reduction of pressure in a regulator is to 500 PSIG.
What is a gas pressure regulator?A gas pressure regulator can be defined as a mechanical device that is designed and developed to ensure that a controlled amount of gas is supplied from a gas cylinder (source).
This ultimately implies that, a gas pressure regulator is required on a gas cylinder in order to reduce very high (unusable) pressure within the gas cylinder to a safer and usable delivery pressure.
In Science, a two-stage gas pressure regulator is designed and developed to lower very high (unusable) pressure in two (2) stages.
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A circular loop of wire of area 10 cm^2 carries a current of 25 A. At a particular instant, the loop lies in the xy-plane and is subjected to a magnetic field B =(2.0iˆ+6.0jˆ+8.0kˆ)×10−3T. As viewed from above the xy-plane, the current is circulating clockwise. (a) What is the magnetic dipole moment of the current loop? (b) At this instant, what is the magnetic torque on the loop?
Answers
The magnetic dipole moment of the current loop is 0.025 Am².
The magnetic torque on the loop is 2.5 x 10⁻⁴ Nm.
What is magnetic dipole moment?The magnetic dipole moment of an object, is the measure of the object's tendency to align with a magnetic field.
Mathematically, magnetic dipole moment is given as;
μ = NIA
where;
N is number of turns of the loopA is the area of the loopI is the current flowing in the loopμ = (1) x (25 A) x (0.001 m²)
μ = 0.025 Am²
The magnetic torque on the loop is calculated as follows;
τ = μB
where;
B is magnetic field strengthB = √(0.002² + 0.006² + 0.008²)
B = 0.01 T
τ = μB
τ = 0.025 Am² x 0.01 T
τ = 2.5 x 10⁻⁴ Nm
Thus, the magnetic dipole moment of the current loop is determined from the current and area of the loop while the magnetic torque on the loop is determined from the magnetic dipole moment.
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