Answer:
C) The ratio of the change in an object's length to its original length when stretched or compressed.
Explanation:
The formula for strain is:
Strain = Change in Length/Origin Length
Hence, it can be described as the percentile of change in the dimension with respect to the original dimension. So, whenever a tensile or a compressive force is applied on a body, its length changes. The ratio of this change to original length is called strain. So, the correct option is:
C) The ratio of the change in an object's length to its original length when stretched or compressed.
A child moving at constant velocity carries a 2 N ice-cream cone 1 m across a level surface. What is the net work done on the ice-cream cone?
Answer:
2 Joule
Explanation:
Work=force *dISPLACMENT
2N*1M
2 JOUL
The force stretching the D string on a certain guitar is 130 N. The string's linear mass density is 0.006 kg/m. What is the speed of the waves on the string?
Answer:
The value is \(v = 147.2 \ m/s\)
Explanation:
From the question we are told that
The force is \(F = 130 \ N\)
The linear mass density is \(\mu = 0.006 \ kg/m\)
Generally the speed of the wave on the string is mathematically represented as
\(v = \sqrt{\frac{F}{\mu } }\)
=> \(v = \sqrt{\frac{130}{0.006} }\)
=> \(v = 147.2 \ m/s\)
An engineer is building a device to open and close a door. He's using a 48V power supply and needs 3A present at the door motor to open it properly. What combination of resistors should he use?
Question 10 options:
A)
Two 6 ohms and a 10 ohm
B)
Four 8 ohms and two 4 ohms
C)
Four 2 ohms
D)
Three 8 ohms
The combination of resistors should he use will be the two resistors one having resistance 10 ohm and another will be 6 ohms. Option A is correct.
What is resistance?Resistance is a type of opposition force due to which the flow of current is reduced in the material or wire. Resistance is the enemy of the flow of current.
The given data in the problem is;
V is the voltage= 48 V
Current,I=3A
R is the resistance
From ohm's law the voltage is found as;
V=IR
R=V/I
R=48 / 3
R = 16 ohm
If two resistors have the resistance 6 ohms and 10 ohm connected in the series the equivalent resistance is;
\(\rm R_{eq}=10 \ ohm + 6 \ ohm \\\\ R_{eq}= 16 \ ohm\)
He should combine two resistors, one with a resistance of 10 ohms and the other with a resistance of 6 ohms.
Hence, option A is correct.
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pls help, it's due tomorrow!
An electron travels 2.68 m in 6.11 × 10−8 s. How fast does it travel in cm/s? Answer in units of cm/s.
The speed (in cm/s) of the electron, given that it travels 2.68 m in 6.11×10⁻⁸ s is 4.39×10⁵ cm/s
How to determine the speedWe'll begin by defining speed. This is given below.
Speed is defined as the distance travelled per unit.
Speed = distance / time
With the above formula, we can obtain the speed of the electron. Details below
The following data were obtained from the question give above:
Distance = 2.68 m = 2.68 / 100 = 0.0268 cmTime = 6.11×10⁻⁸ sSpeed =?Speed = distance / time
Speed = 0.0268 cm / 6.11×10⁻⁸ s
Speed = 4.39×10⁵ cm/s
Therefore, the speed is 4.39×10⁵ cm/s
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Q2: W A soccer ball is kicked off the ground at an angle
of 40 degrees at a speed of 40mls.
co Find The maximum height that the ball will reach
Answer:
1metre
Explanation:
height gained is equal to speed multiplied by angle
Is there a difference between shapes when plotting Uniform acceleration towards (+)directtion,Uniform acceleration towards (-)direction, Uniform deceleration towards (+) direction and Uniform deceleration towards (-) direction in displacement time graph.Can you draw the shapes for each type ?
Explanation:
Yes, there are differences in the shapes of position-time graphs for uniform acceleration and uniform deceleration in different directions. Let's consider each case separately:\(\hrulefill\)
(1) - Uniform acceleration towards the positive direction:
In this case, the object is moving in the positive direction with a constant acceleration. The displacement-time graph will typically be a curve that starts from an initial position and shows a steady increase in displacement over time. The shape of the graph will depend on the specific acceleration value.
(2) - Uniform acceleration towards the negative direction:
In this case, the object is moving in the negative direction with a constant acceleration. The displacement-time graph will also be a curve, but it will show a steady decrease in displacement over time.
(3) - Uniform deceleration towards the positive direction:
In this case, the object is initially moving in the positive direction but is slowing down with a constant deceleration. The displacement-time graph will be a curve that starts with a positive slope and gradually levels off.
(4) - Uniform deceleration towards the negative direction:
In this case, the object is initially moving in the negative direction but is slowing down with a constant deceleration. The displacement-time graph will be a curve that starts with a negative slope and gradually levels off.
Can someone please do this I’m completely lost in physics I don’t get shi, so if you have the time to go on the website and solve it please do so
Answers will be used more than once.
A) Kinetic Energy
B) Chemical Potential Energy
C) Elastic/Spring Potential Energy
D) Potential Energy
E) Gravitational Potential Energy
__16. A hamburger ready to be eaten
__17. Energy of a spinning bicycle wheel
__18. Energy that is stored
__19. The spring in the pen that clicks
__20. A book sitting on a shelf
__21. Energy stored in a boulder on a mountaintop
__22. The stretch of a muscle
__23. A moving car
__24. Energy stored in food
__25. A person climbing a ladder
Answer:
16. D
17. A
18. D
19. C
20. D
21. E
22. A
23. A
24. B
25. E
Side note: I deserve brainliest for this one lol
Atoms are composed of protons, ______, and electrons.
Atoms are composed of protons, \(\sf\purple{neutrons}\)and electrons. ✅
The \(\sf\blue{protons}\) (positively charged) and the \(\sf\pink{neutrons}\) (no charge) are in the centre of the atom, making up the nucleus.\(\sf\red{Electrons}\) (negatively charged) are present in the outermost shell of the atom.\(\bold{ \green{ \star{ \orange{Hope\:it\:helps.}}}}⋆\)
A breaker holds 124.9 g of water. The initial temperature of the water is 22.3 C how much energy is needed to raise the temperature of the water to 33.5 C? The specific heat of the water is 4.18 j/g* C
Answer:
Approximately \(5.85 \times 10^{3}\; {\rm J}\) assuming no energy loss to the surroundings of the water in this beaker.
Explanation:
Let \(c\) denote the specific heat of a material. The energy \(Q\) required to raise the temperature of \(m\) (mass) of this material by \(\Delta T\) (change in temperature) is:
\(Q = c\, m\, \Delta T\).
In this question, it is given that the specific heat of water is \(c = 4.18\; {\rm J \cdot g^{-1}\cdot K^{-1}}\). It is also given that the mass of the water in this beaker is \(m = 124.9\: {\rm g}\).
The change in the temperature is:
\(\Delta T = (33.5 - 22.3)\; {\rm K} = 11.2\; {\rm K}\).
Assume that there is no heat loss to the surroundings of the water in this beaker. Energy required to achieve this change in temperature would be:
\(\begin{aligned}Q &= c\, m\, \Delta T \\ &= 4.18 \; {\rm J \cdot g^{-1}\cdot K^{-1}} \times 124.9\; {\rm g} \times (33.5 - 22.3)\; {\rm K} \\ &= 4.18 \; {\rm J \cdot g^{-1}\cdot K^{-1}} \times 124.9\; {\rm g} \times 11.2 \; {\rm K} \\ &\approx 5.85 \times 10^{3}\; {\rm J}\end{aligned}\).
a plane files from point a to point b. b is 1207 km west 957 km south a. sketch a picture of this situation. what is the total displacement of the plane
The closest distance and angle to this question are 1540.35 kilometers and 38.4 ° S. (depending on how you rounded).
What is Displacement and distance are they equivalent?There is a common misconception that distance & displacement are simply two different terms for the same thing. But separation separates the concepts of distance and displacement. The total distance covered by an object is always larger than the movement between those two sites, even if it changes direction throughout the course of its voyage.
The displacement is which one, which?The smallest (straight line) length between a body's starting position and its final location—represented by an arrow pointing from starting spot to final position—is referred to as a brain's displacement when it moves through one position to another.
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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!
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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A top fuel dragster is designed to go from 0 to100 miles per hour in a mere 0.8 seconds. Calculate its acceleration. Show your work and include units.
The acceleration of the dragster is 2.01 * 10^5 m/s^2
What is the acceleration?The term acceleration refers to the change in velocity with time. Hence the formula for acceleration is given as;
a = v - u/t
a = acceleration
v = final velocity
u = initial velocity
t = time taken
Now;
v = 100 miles or 160934 meters
u = 0 miles or 0 meters
t = 0.8 seconds
a = 160934 - 0/ 0.8
a = 2.01 * 10^5 m/s^2
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HI PLEASE HELP ON QUESTION ASAP USING AVERAGE (MEAN) TO ANSWER QUESTION! IF UR ANSWER AND EXPLAINATION IS CORRECT ILL RATE YOU FIVE STARS, A THANKS AND MAYBE EVEN BRAINLIEST. PLEASE MAKE SURE YOU ANSWER MY QUESTION USING AVERAGES.
1) a meal for 6 cost £12 per person. as it is one of the diners birthday , the other 5 decided to pay for his meal. how much do each of the five friends need to pay?
Each of the five friends needs to pay £12 to cover the cost of their own meals and contribute towards the birthday person's meal. Using mean allows us to distribute the cost equally among the friends, ensuring a fair division of expenses for the meal.
To determine how much each of the five friends needs to pay, we can use the concept of averages (mean) and divide the total cost by the number of people paying.
In this scenario, the total cost of the meal for 6 people is £12 per person. Since the other 5 friends have decided to pay for the birthday person's meal, they will collectively cover the cost of their own meals plus the birthday person's meal.
To calculate the total cost covered by the five friends, we can subtract the cost of one person's meal (since the birthday person's meal is being paid by the group) from the total cost. The cost of one person's meal is £12.
Total cost covered by the five friends = Total cost - Cost of one person's meal
= (£12 x 6) - £12
= £72 - £12
= £60
Now, to find out how much each of the five friends needs to pay, we divide the total cost covered by the five friends (£60) by the number of friends (5).
Amount each friend needs to pay = Total cost covered by the five friends / Number of friends
= £60 / 5
= £12
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How long would it take a machine to do 5.000
joules of work if the power rating of the machine
is 100 watts?
A. 5,000 sec
B.
50 sec
C.
10 sec
D. 0.2 sec
Answer : B
Answer:
a
Explanation:
How long would it take a machine to do 5.000
joules of work if the power rating of the machine
is 100 watts?
The given machine will take 50 s to complete the work. the power is the rate of performing work.
What is power?It can be defined as the rate of performing work. It can also be written as the amount of work divided by the time it takes to complete the work.
\(p = \dfrac wt\)
So
\(t = \dfrac w p\)
Where,
\(p\) - power = 100 watt = 100 J/s
\(t\) - time = ?
\(w\)- work = 5000 J
Put the values in the formula,
\(t = \dfrac{ 5000 \rm \ J} {100 \rm \ J/s}\\\\t = 50 \rm \ s\)
Therefore, the given machine will take 50 s to complete the work.
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A student standing on the ground throws a ball straight up. The ball leaves the student's hand with a speed of 13m/s when the hand is 2.40m above the ground. How long is the ball in the air before it hits the ground? (The student moves her hand out of the way.)
The ball is in the air for 2.605 seconds.
To solve this problem, we can use the equations of motion for an object in free fall under the influence of gravity. The equation we will use is:
y = y0 + v0t + (1/2)gt^2, where y is the final position, y0 is the initial position, v0 is the initial velocity, g is the acceleration due to gravity (-9.8m/s^2), and t is the time elapsed.
We want to find the time t when the ball hits the ground, so we will set y to 0 and solve for t. Plugging in the given values, we get:
0 = 2.40 + 13t + (1/2)(-9.8)t^2
Rearranging and using the quadratic formula, we get:
t = (-13 ± √(13^2 - 4(1/2)(-9.8)(2.40)))/(2(1/2)(-9.8))
Simplifying, we get two solutions for t:
t = 0.189 seconds
t = 2.605 seconds
The first solution corresponds to the time when the ball leaves the student's hand, and the second solution corresponds to the time when the ball hits the ground. Therefore, the ball is in the air for 2.605 seconds before it hits the ground.
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Fig above shows a wave traveling through a medium. Use the fig to answer the questions below.
A.)What is the amplitude of the wave ? Include correct units.
B.)Use the graph to determine the time of one wave. Use it to find the frequency.
C.)If the speed of the wave is 25 m/s, what is the wavelength of the wave ? Show data listing, equation , substitution leading to the answer for full credit.
(a) The amplitude of the wave is 0.2 m.
(b) The period of the wave is 4 s.
(c) The wavelength of the wave is 100 m.
What is the amplitude of the wave?(a) The amplitude of the wave is the maximum displacement of the wave.
amplitude of the wave = 0.2 m
(b) The period of the wave is the time taken for the wave to make one complete cycle.
period of the wave = 5.5 s - 1.5 s = 4 s
(c) The wavelength of the wave is calculated as follows;
λ = v / f
where;
v is the speed of the wavef is the frequency of the wavef = 1/t = 1 / 4s = 0.25 Hz
λ = ( 25 m/s ) / 0.25 Hz
λ = 100 m
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Which model best describes how gravity causes star formation?
A. Ocean waves hit a sand castle and cause it to collapse.
OB. A ball of clay is flattened when it hits the ground.
C. Water droplets drip down the outside of a cold window.
D. A paper ball becomes denser as a person squeezes it.
The best analogy for how gravity creates stars is when water drops fall from a chilly window onto a sand building, which eventually crumbles.
Why exactly does gravity have a force?Gravity, on the other hand, is a force inside the broadest sense since it characterizes the resultant interaction between two masses. Both the motion of objects through stretched spacetime and the warping of spacetime are the main origins of gravitational influence. The effect, however, appears to be the result of using force.
What factors determine gravity?This force's strength is influenced by the mass of the each object and the separation between their centers. According to mathematics, the gravitational pull of an object is directly proportional to its mass and inversely proportional to the square of its distance from another object.
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Why do cats have tails?
Sorry if wrong subject.
I am awarding first to answer brainly-est!
Thank you!!
Which of these does NOT use a reed?
O Flute
Clarinet
Oboe
Bassoon
The answer is: Flute. Hope this helps :)
A wave has an amplitude of 0.0800 m
and is moving 7.33 m/s. One oscillator
in the wave takes 0.230 s to go from
one crest to the next crest. Find the
wavelength of the wave.
(Unit = m)
If a wave has an amplitude of 0.0800 m and is moving 7.33 m/s. The
wavelength of the wave is 1.69m.
What is the wavelength?The wavelength of a wave can be determined using the equation:
Wavelength = velocity / frequency
To determine the frequency we need to calculate the reciprocal of the time it takes for one complete oscillation.
frequency = 1 / time
frequency = 1 / 0.230
frequency ≈ 4.35 Hz
Substitute the values into the wavelength equation:
wavelength = velocity / frequency
wavelength = 7.33 / 4.35
wavelength ≈ 1.69m
Therefore the wavelength of the wave is approximately 1.69 meters.
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Starting with the general formulas for gravitational force and centripetal force, derive the relationship between speed (v) and orbital radius (r) for a circular orbit. Show your work. Is the relationship consistent with what you observed in Step 8? Explain.The observation in step 8 was: The velocity needed to increase to obtain a circular orbit at the smaller radius.
Consider:
The mass of the planet is M.
The mass of the orbiting body is m.
The radius of the orbital in which the body is revolving around the planet is r.
The speed of the orbiting body is v.
Solution:
The gravitational force acting on the orbiting body due to the planet is,
\(F=\frac{\text{GMm}}{r^2}\)where G is the gravitational constant,
This gravitational force acting on the orbiting body helps the body to move in a circular motion around the planet.
The centripetal force acting on the orbiting body is,
\(F=\frac{mv^2}{r}\)As the centripetal force and the gravitational force acting on the orbiting body are the same, thus,
\(\begin{gathered} \frac{\text{GMm}}{r^2}=\frac{mv^2}{r} \\ \frac{GM}{r}=v^2 \\ v=\sqrt[]{\frac{GM}{r}} \end{gathered}\)From the formula, the speed of the orbiting body is inversely proportional to the orbital radius.
Thus, with the decrease in the orbital radius of the orbiting body, the velocity of the body increases.
Hence, the relation between the velocity and orbital radius is consistent with the observation in step 8.
pls help will give brainlest
Respon
lqiudos ciopatmibes
ly apsamtios ccoriendor sabe r
llpop
io.
Answer:
Solid, liquid, gas, plasma (your right!)
Explanation:
Think about having to add heat(energy) to each state of matter, and then think of which state of matter would be a result.
Solid ice + heat= liquid water
liquid water+ heat= water vapor (steam which is a gas)
Part F
Imagine you were a sportscaster at the Olympics. You'd created a mathematical model similar to the one you just did. Imagine that you had a
computer program that could do an instantaneous analysis of video motion using that model. How could you use it in your sportscast?
A program that could do an instantaneous analysis of video motion will be useful it in a sportscast to analyze events as they occur.
Why will a program be needed?A motion video is defined as the display of video images at a rate (such as thirty frames per second) that causes objects to appear to move smoothly and continuously.
Sports inherently involve fast and accurate motion, which can be difficult for competitors to master but also for coaches and trainers to analyze and audiences to follow. Because of the nature of most sports, monitoring with sensors or other devices attached to players or equipment is generally not possible. This opens up a plethora of opportunities for the use of computer vision techniques to assist competitors, coaches, and the audience
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Why is the mass of an atom's electrons not included in the atom's mass number?
A. The electrons move so fast that their mass cannot be measured.
B. The electrons' negative charge cancels out their masses.
C. The electrons' mass is represented in the atomic number.
D. The electrons are much less massive than the rest of the atom.
Answer: A: the electrons move so fast that their mass cannot be measured
Explanation: because they are so fast scientist and other people cannot measure them
Answer:
A
Explanation:
Discuss how the pressure cooker is designed to achieve temperatures above 100°C.
With rising heat, the steam pressure inside the pot builds up beyond atmospheric pressure, allowing the temperatures to rise well above boiling point. This design enables to save time, energy, and resources. The temperature inside a pressure cooker can well go beyond 110° C, which reduces the time needed to cook food.
How are cells organized:
A: Organs
B: Organelles
C: Tissues
The body has levels of organization that build on each other. Cells make up tissues, tissues make up organs, and organs make up organ systems. The function of an organ system depends on the integrated activity of its organs. For instance, digestive system organs cooperate to process food.
The answer is : C
describe how mercury in glass thermometer can be constructed?
It consists of a bulb containing mercury attached to a glass tube of narrow diameter, the volume of mercury in the tube is much less than the volume in the bulb. The space above the mercury may be filled with nitrogen gas or it may be at less than atmospheric pressure, a partial vacuum.
Consider the circuit in Figure 5 with e(t) = 12sin(120pit) V. When S1 and S2 are
open, i leads e by 30°. When SI is closed and S2 is open, i lags e by 30°. When S1 and S2 are closed, i has an amplitude 0.5A. What are R, L, and C?
Based on the information, it should be noted that the resistance R is 0.5 Ω.
How to calculate the resistanceWhen S1 and S2 are open, i leads e by 30°. In this case, the circuit consists of only the inductor (L) and the capacitor (C) in series. Therefore, the impedance of the circuit can be written as:
Z = jωL - 1/(jωC)
Since i leads e by 30°, we can express the phasor relationship as:
I = k * e^(j(ωt + θ))
Z = jωL - 1/(jωC) = j(120π)L - 1/(j(120π)C)
Re(Z) = 0
By equating the real parts, we get:
0 = 0 - 1/(120πC)
Let's assume that there is a resistance (R) in series with the inductor and capacitor. The impedance equation becomes:
Z = R + jωL - 1/(jωC)
Z = R + jωL
Im(Z) = ωL > 0
Substituting the angular frequency and rearranging the inequality, we have:
120πL > 0
L > 0
This condition implies that the inductance L must be greater than zero.
When S1 and S2 are closed, i has an amplitude of 0.5 A. In this case, the impedance is:
Z = R + jωL - 1/(jωC)
Since the amplitude of i is given as 0.5 A, we can express the phasor relationship as:
I = 0.5 * e^(j(ωt + θ))
By substituting this phasor relationship into the impedance equation, we can determine the value of R. The real part of the impedance must be equal to R:
Re(Z) = R
Since the amplitude of i is 0.5 A, the real part of the impedance must be equal to 0.5 A: 0.5 = R
Therefore, the resistance R is 0.5 Ω.
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a soap bubble was slowly enlarged from radius 4cm to 6cm and amount of work necessary for enlargement is 1.5 *10 calculate the surface tension of soap bubble joules
Answer:
The surface tension is 190.2 N/m.
Explanation:
Initial radius, r = 4 cm
final radius, r' = 6 cm
Work doen, W = 15 J
Let the surface tension is T.
The work done is given by
W = Surface Tension x change in surface area
\(15 = T \times 4\pi^2(r'^2 - r^2)\\\\15 = T \times 4 \times 3.14\times 3.14 (0.06^2- 0.04^2)\\\\15 = T\times 0.0788\\\\T = 190.2 N/m\)