Answer:
a) 6.46 s
b) 73.0 m
c) 22.6 m/s, 26.7 m/s
Explanation:
The position can be found with constant acceleration equation:
x = x₀ + v₀ t + ½ at²
where x is the final position,
x₀ is the initial position,
v₀ is the initial velocity,
a is the acceleration,
and t is the time.
For John:
x₀ = 0 m
v₀ = 0 m/s
a = 3.50 m/s²
For Peter:
x₀ = 0 m
v₀ = 0 m/s
a = 4.90 m/s²
John's position at time t is:
x = 0 + (0) t + ½ (3.50) t²
x = 1.75 t²
Peter starts 1 second after John. Peter's position at time t−1 is:
x = 0 + (0) (t−1) + ½ (4.90) (t−1)²
x = 2.45 (t−1)²
When Peter overtakes John, they have the same position:
1.75 t² = 2.45 (t−1)²
1.75 t² = 2.45 (t² − 2t + 1)
1.75 t² = 2.45 t² − 4.90 t + 2.45
0 = 0.70 t² − 4.90 t + 2.45
0 = 2 t² − 14 t + 7
t = [ 14 ± √(169 − 4(2)(7)) ] / 4
t = 0.54, 6.46
Since t > 1, Peter overtakes John 6.46 seconds after the race starts, which means he drives for 5.46 seconds.
The distance Peter travels is:
x = 2.45 (6.46 − 1)²
x = 73.0
Peter travels 73.0 meters.
The speed that John reaches is:
v = (3.50 m/s²) (6.46 s)
v = 22.6 m/s
The speed that Peter reaches is:
v = (4.90 m/s²) (5.46 s)
v = 26.7 m/s
Peter takes 5 seconds to overtake John, travels a distance of 61.25 meters before he catches up, and they have speeds of 24.5 m/s and 21.0 m/s, respectively, at the instant Peter overtakes John.
Explanation:To solve this physics problem, we use the equations of motion to determine the time it takes for Peter to overtake John, the distance Peter travels before he catches John, and the speeds of both cars at the instant Peter overtakes John. Since both Peter and John start from rest, their initial velocities (v0) are 0 m/s. Peter accelerates at 4.90 m/s2, while John accelerates at 3.50 m/s2. John starts 1 second before Peter.
Solution:
Let t be the time after Peter starts when he catches up to John. Since John had a 1 second head start, John's time is (t+1) seconds. The distance each covers is given by the equation of motion x = v0t + 1/2at2.For Peter: x = 1/2(4.90 m/s2)t2For John: x = 1/2(3.50 m/s2)(t+1)2Since they cover the same distance when Peter catches up, we can set these two equations equal and solve for t.After some algebraic manipulation, we find that t = 5 seconds.The distance Peter travels is found by substituting the value of t back into Peter's equation of motion, giving x = 1/2(4.90 m/s2)(5 s)2 = 61.25 meters.To find the speeds of both cars at the instant Peter overtakes John, we use the formula v = v0 + at. For Peter, v = 0 m/s + (4.90 m/s2)(5 s) = 24.5 m/s. For John, v = 0 m/s + (3.50 m/s2)(5+1 s) = 21.0 m/s.Therefore, Peter takes 5 seconds to overtake John, travels a distance of 61.25 meters before he catches up, and they have speeds of 24.5 m/s and 21.0 m/s, respectively, at the instant Peter overtakes John.
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A 1.3 kg mass is attached to a spring with a force constant of 52 N/m. If the mass is released with a speed of 0.28m/s at a distance of 8.1 cm from the equilibrium position of the spring, what is its speed when it is halfway to the equilibrium position?
Answer:
0.52 m/s
Explanation:
Energy is conserved.
Initial kinetic energy + initial potential energy = final kinetic energy + final potential energy
½ m v₁² + ½ k x₁² = ½ m v₂² + ½ k x₂²
m v₁² + k x₁² = m v₂² + k x₂²
Given:
m = 1.3 kg
k = 52 N/m
v₁ = 0.28 m/s
x₁ = 0.081 m
x₂ = 0.081 m / 2 = 0.0405 m
(1.3) (0.28)² + (52) (0.081)² = (1.3) v² + (52) (0.0405)²
v = 0.52
The velocity halfway to the equilibrium position is 0.52 m/s.
when two equal forces act on the same object in opposite directions, what is the net force?
Answer:
0
Explanation:
Forces with equal magnitudes and opposite directions cancel each other out, so the net force is 0.
Answer:
0
Explanation:
when you try to give two equal force on object in opposite side, the object will not move.hence the net force will be zero
mark me as brainliest please
what is aerodynamics
Answer:
the branch of mechanics that deals with the motion of air and other gases and with the effects of such motion on bodies in the medium.Compare aerostatics(def 1).
Explanation:
Answer:
Aerodynamics is the way air moves around things.
In both the faraday and Henry experiments, a current was generated in the secondary coil by the phenomenon called ____?
Answer:
I think it's self inductance, but without knowing the options I'm not certain.
Answer:
induction
Explanation:
Which of the following are examples of both projectile motion and 2-dimensional motion?
Answer:
A
is answer
because of questions
Answer:
D. A football thrown upward at an angle.
Explanation:
When an object is thrown in space, it is known as projectile and its motion is known as projectile motion. 1 dimensional motion refers to the motion either in horizontal or vertical direction. 2-dimensional motion refers to the motion in both horizontal and vertical direction. A football thrown at an angle will have constant horizontal velocity and accelerated motion in vertical direction. Thus, it is an example of projectile motion as well as two-dimensional motion.
A force of 7.50N is applied to a spring whose spring constant is 0.298N/cm N/cm. find its change in length
Answer:
25.2
Explanation:
F=KL
L=F/K
L=7.50/0.298
L=25.2M
2. A body is thrown vertically upward with a speed of 100 m/s.The time taken to be
the earth is
a. 10 sec
b. 20 sec
c. 15 sec
d. 5 sec
Answer:
b. 20 sec
Explanation:
y = y₀ + v₀ t + ½ g t²
0 = 0 + (100) t + ½ (-10) t²
0 = 100t − 5t²
0 = t (100 − 5t)
t = 0, t = 20
The body lands after 20 seconds.
Match each word with its definition.
scalar
1. distance plus direction
speed
2. 30 m/s northwest, for example
average speed
3. total distance divided by total time
what an object going around a curve at a constant speed is
undergoing
acceleration
5. 30 m/s, for example
displacement
6. any non-directional quantity
velocity
1. distance plus direction
displacement
2. 30 m/s northwest, for example
velocity
3. total distance divided by total time
average speed
4. what an object going around a curve at a constant speed is
undergoing
acceleration
5. 30 m/s, for example
speed
6. any non-directional quantity
scalar
The given terms are matched with their respective definitions as follows,
The distance plus direction is known as displacement, 30 meters / second northwest is an example of the velocity, total distance divided by the total time then an object going around a curve at a constant speed is undergoing acceleration.
What is displacement?Displacement describes this shift in location.
1. distance plus direction ⇒⇒displacement
2. 30 m/s northwest, for example, ⇒⇒velocity
3. Total distance divided by the total time ⇒⇒average speed
4. An object going around a curve at a constant speed undergoing ⇒⇒acceleration
5. 30 m/s, for example, ⇒⇒speed
6. Any non-directional quantity ⇒⇒ scalar
Thus, An object traveling around a curve at a constant speed experiences acceleration. Distance plus direction is known as displacement, and 30 meters per second to the northwest is an example of velocity.
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Average velocity is different than average speed because calculating average velocity involves .
Average speed is total distance traveled divided by time. It is a scalar quantity (just magnitude).
Average velocity is displacement divided by time. It is a vector quantity (magnitude and direction).
An average velocity is different from average speed as average velocity is calculated using total displacement and total time into consideration.
Explanation:
The average velocity is calculated using the total displacement and total time, whereas the average speed is calculated using the total distance and total time.
“Average velocity is a vector quantity” and thus takes the magnitude and direction of vector displacement in calculation. Average speed is scalar quantity.
[tex]\text {Average velocity}=\frac{\text {Total displacement}}{\text {Total time}}[/tex]
If a vector 2ỉ +3j +8k is perpendicular to the
vector 4j-4i + ak, then the value of a is
Explanation:
if two vectors are perpendicular to each other then thier dot product is equal to zero so (2i+3j+8k).(-4i+4j+ak)=0 (2)(-4) +(3)(4)+(8)(a) =0 -8+12+8a=0 4+8a=0 8a=-4
[tex]a = \frac{ - 4}{8} [/tex]
[tex]a = \frac{ - 1}{2} [/tex]
Communicating results allows scientists to learn from each other's results.
True
False
True, scientists often talk to each other to figure out if their results were similar and what they could have done better.
Although, talking to other scientists does have risks, other scientists could copy your work and further better it.
So, your final answer is TRUE, sorry for the long answer, I needed to have a word count about 20 characters and then I got carried away! lol
Guyz... Its my first question in this app... Pls do answer
Answer:
1.414
Explanation:
Snell's law states:
n₁ sin θ₁ = n₂ sin θ₂
where n is the index of refraction and θ is the angle of incidence (relative to the normal).
The index of refraction of air is approximately 1. So:
1 sin 45° = n sin 30°
n = sin 45° / sin 30°
n = 1.414
Round as needed.
Which statement is true about the ideal mechanical advantage of a third-class lever?
It is always equal to 1.
It is always greater than 1.
It is always less than 1.
It can be less than, greater than, or equal to 1.
Answer:
C
Explanation:
The mechanical advantage is always less than 1 because the force needed to move an object is always greater than the weight of the object.
Answer:
It is always less than 1.
Explanation:
One charge is decreased to one-third of its original value,
and a second charge is decreased to one-half of its
original value.
How will the electrical force between the charges compare
with the original force?
o It will increase to six times the original force.
O It will increase to thirty-six times the original force.
It will decrease to one-sixth the original force.
It will decrease to one-thirty-sixth the original force.
Answer:
the Third option
Explanation:
Answer:
It will decrease to one-sixth the original force.
Explanation:
The electrical force is given by :
[tex]F=k\dfrac{q_1q_2}{r^2}[/tex]..............(1)
Where
k is the electrostatic constant
r is the distance between charges
One charge is decreased to one-third of its original value, and a second charge is decreased to one-half of its original value.
i.e. [tex]q_1'=\dfrac{q_1}{3}[/tex]
and [tex]q_2'=\dfrac{q_2}{2}[/tex]
New force is given by :
[tex]F'=k\dfrac{q_1q_2}{6r^2}[/tex]
[tex]F'=\dfrac{F}{6}[/tex]
So, the new force will decrease to one-sixth the original force. Hence, the correct option is (c).
1. The following equation is derived from Newton's Second Law of Motion. A body of mass has a Force of 20 N/s and an acceleration of 50 m/s2. What's the mass of the object?
A. 0.8 kg
B. 0.5 kg
C. 0.4 kg
D. 1.5 kg
Newton's second law for an object's motion in one spatial dimension:
F = ma
F is the net force acting on the object, m is the object's mass, and a is the object's acceleration.
Given values:
F = 20N
a = 50m/s²
Plug in these values and solve for m:
20 = m(50)
m = 0.4kg
Choice C
Using Newton's Second Law of Motion, the mass of the object is calculated as 0.4 kg by dividing the force (20 N) by the acceleration (50 m/s²), corresponding to option C.
Explanation:The question is asking to determine the mass of the object based on the given force and acceleration using Newton's Second Law of Motion. According to Newton's Second Law, Force (F) equals mass (m) times acceleration (a), which is expressed as F = m * a. To find the mass, we rearrange the equation to m = F / a.
In this case, the force (F) is 20 Newtons (N), and the acceleration (a) is 50 meters per second squared (m/s²). Plugging these values into the equation, we get:
m = F / a = 20 N / 50 m/s² = 0.4 kg
Therefore, the mass of the object is 0.4 kg, which corresponds to option C.
Which is a chemical change?
A. Splitting water into hydrogen and oxygen.
B. Breaking a block of solid ice into smaller pieces.
C. Freezing liquid water.
D. Boiling Water
Answer:
A. Splitting water into hydrogen and oxygen.
Explanation:
A chemical change produces a new substance. ... A physical change does not produce a new substance. Changes in state or phase (melting, freezing, vaporization, condensation, sublimation) are physical changes.
Splitting water into hydrogen and oxygen.
3. A beam of light emerges from water into air at an angle. The beam is bent
a. towards the normal
b. away from the normal.
c. 48 degrees upward.
d. 96 degrees upward.
Pls reply fast
We have that the beam of light that emerges from water into air at an angle that bends
Away from the normal
Option B is correct
Normal of a Plane
In geometry, a normal is an object such as a line, ray, or vector that is perpendicular to a given object. The normal line to a plane curve at a given point is the line perpendicular to the tangent line to the curve at the point.
Therefore it is seen From the Question Image that
The Beam is NOT bent
Towards the normal 48 degrees upward. 96 degrees upward.But Rather
Away from the normal.
In conclusion
The beam of light that emerges from water into air at an angle that bends
Away from the normal
Option B is correct
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The density of some air at a pressure of 7720mmhg is 1.26kgm^-³. Determine its density at a pressure at 600mmHg?
Answer:
0.0979 kg/m³
Explanation:
Treating air as an ideal gas:
PV = nRT
n/V = P/RT
Density depends on both pressure and temperature. If we assume the temperature is constant, we can say that density is directly proportional to pressure.
ρ = kP
ρ/P = k
Writing a proportion:
(1.26 kg/m³) / (7720 mmHg) = ρ / (600 mmHg)
ρ = 0.0979 kg/m³
Answer:
[tex]\rho = 0.098 kg/m^3[/tex]
Explanation:
As we know that for ideal gas we will have
[tex]PV = nRT[/tex]
here we can convert it into the form of density
[tex]PV = \frac{m}{M}RT[/tex]
now we have
[tex]PM = \rho RT[/tex]
now if the temperature will remain constant then in that case
[tex]\frac{P}{\rho} = constant[/tex]
so we will have
[tex]\frac{P_1}{P_2} = \frac{\rho_1}{\rho_2}[/tex]
here we can plug in all values in it
[tex]\frac{7720}{600} = \frac{1.26}{\rho}[/tex]
now we have
[tex]\rho = \frac{600}{7720}(1.26)[/tex]
[tex]\rho = 0.098 kg/m^3[/tex]
Describe a situation in your everyday life where you could use the scientific method. List all the steps of the scientific method and explain how you would apply each of the steps in that situation.
Yes, scientific method can be applied on many everyday activities to get a reasonable solution. Infact normally we are applying this method without having it in our knowledge that we are applying it.
For example: In morning we are going to office and we start the car, but it is not started.You turn the engine again and again but it simply donot works.
Observation (the state of defining a problem):
The car is not started
Hypothesis (A possible solution based on the information we already know):
The car is not started because it might be out of gas or there can be some other technical fault.
Experiment (testing of hypothesis by applying different methods of solving problem):
You get the fuel and put it inside the car but it still donot works and car didnot start. Experiment didnot get solution.
Analyze the results of data and test another hypothesis
You call a technician and he check with the car engine tries and finds out that the engine was out of order and needs repairing.
Draw conclusion:
The engine do not works when it is out of order and it is a cause of a car not being started.
Now the theory and law making part can not be applied on this case but it is a part of scientific method.
Hope it helps!
For the following series circuit, compute the power in R1, R2, and R3 if the circuit values are E = 24 volts, R1 = 8, R2= 12, and R3 = 28. Power in R1 = watts Power in R2 = watts Power in R3 = watts Compute the total power delivered to the circuit by the 24-volt battery: watts
Answer:
Explanation:
You add resistances to get the total R in a series circuit.
R = R1 + R2 + R3
R = 8 + 12 + 28
R = 48 ohms.
Next the current is the same going through each of the resistors.
I = E / R
I = 24 / 48
I = 1/2
I = 0.5
But you are asked for power in each resistor
P = I * I*R
P = I^2 * R1
P1 = (0.5^2) * 8
P1 = 1/4 * 8 = 2 watts
P2 = I^2 * R2
P2 = (1/2)^2 * 12
P2 = 3 watts
P3 = 1/4 * 28
P3 = 7 watts.
=====================
The total power can be found two ways: either by just adding what you got or using voltage.
P = E * I
P = 24 * 1/2 = 12 watts.
Now we can try it the other way.
P = P1 + P2 + P3
P = 2 + 3 + 7
P = 12 watts
Both answers agree.
Answer:
Power in R1 = 2 watts
Power in R2 = 3 watts
Power in R3 = 7 watts
Compute the total power delivered to the circuit by the 24-volt battery: 12 watts
A ball is launched from a cliff with and initial velocity of 15 m/s at an angle of 40 above horizontal. If the ball lands 17.5 m away, determine the height of the cliff.
Explanation:
Evaluate in the x direction to find the time it takes to land:
x = x₀ + v₀ₓ t + ½ aₓ t²
17.5 = 0 + (15 cos 40) t + ½ (0) t²
t = 1.52
Evaluate in the y direction to find the initial height:
y = y₀ + v₀ᵧ t + ½ g t²
0 = h + (15 sin 40) (1.52) + ½ (-9.8) (1.52)²
h = -3.32
The cliff is actually 3.32 meters below where it lands. Make sure you copied the problem correctly.
Which types of electromagnetic waves have higher frequencies than the waves that make up ultraviolet light? Check all that apply
Answer:
X-rays
Gamma rays
Explanation:
The electromagnetic waves are arranged in order of their frequencies and wavelengths. This arrangement forms the electromagnetic spectrum. The x-rays and gamma rays form the part of the spectrum with highest frequencies and least wavelength. In the order of decreasing frequency and increasing wavelength, we start with Gamma rays ,x-rays uv, Visible light, Infrared light,Microwave then radio waves.
Answer:
X rays and Gamma rays.
Explanation:
The electromagnetic waves are arranged in the increasing frequency and energy while decreasing wavelength. So the waves on the right side of ultraviolet spectrum having higher frequency and energy and lower wave length. such as X RAYS AND GAMMA RAYS. Electromagnetic wave spectrum is arranged as.
Radio waves, microwaves, infrared waves, visible rays, ultraviolet waves, x rays, gamma rays.
17. In which layer does mantle convection occur?
rms &
sources
LOGRAMS
A. Lithosphere
B. Inner core
C. Crust
• D. Asthenosphere
Answer:
D. Asthenosphere
Explanation:
The asthenosphere is relatively plastic part of the mantle which underlies the brittle lithosphere. In the asthenosphere, it is generally believed that the rocks are in ductile state and easily moves. It is the site of convection within the earth. In mantle convection, hot and light materials rises and keeps moving into upper crustal levels till they solidify. Here also, cold and denser materials sinks deeper till they turn to melt. This differences in temperature and density sets up a convective cell within the mantle. Several convective cells are in the mantle.
20 points, please help asap!! Needs to be done by today/tonight!! So please help me!!
Describe the appearance of the moon and its position during each phase:
• New moon:
• Waxing crescent moon:
• First quarter moon:
• Gibbous moon:
• Full moon:
• Waning gibbous moon:
• Third quarter moon:
• Waning crescent moon:
Answer:
New Moon
The Moon's position in space at New Moon.
New Moon is the first primary phase and it occurs the moment when the Sun and Moon are aligned, with the Sun and Earth on opposite sides of the Moon.
A New Moon cannot normally be seen from Earth since only the dark side of the Moon faces our planet at this point. Sometimes, if the New Moon is close to the Lunar nodes of its path, it can cause a Solar Eclipse.
The greatest difference between high and low tide, also known as spring tides, takes place around New Moon and Full Moon.
Waxing Crescent Moon
The moment a thin sliver of the Moon becomes visible after New Moon is the beginning of the first intermediate phase, the Waxing Crescent Moon.
In the past, this used to be called New Moon while the darkest phase was called Dark Moon. This traditional definition of New Moon is still in use in some cultures, defining the beginning of the months for instance in the Islamic calendar.
The rest of the Moon is also sometimes faintly visible during most of this phase because Earth also reflects sunlight onto the Moon, a phenomenon called earthshine.
First Quarter Moon
First Quarter Moon is the second primary phase.
First Quarter Moon is the second primary Moon phase and it is defined as the moment the Moon has reached the first quarter of its orbit around Earth, hence the name. It is also called Half Moon as we can see exactly 50% of the Moon's surface illuminated. Whether you see the left or right half illuminated, depends on several factors, including your location.
The smallest difference between high and low tide, also known as neap tides, occurs around the 2 Quarter Moons.
Waxing Gibbous Moon
The second intermediate phase, the Waxing Gibbous Moon, lasts until the next primary phase. Waxing means that it is getting bigger. Gibbous refers to the shape, which is larger than the semicircle shape of the Moon at First Quarter, but smaller than a full circle.
Full Moon
Full Moon is the brightest phase.
@timeanddate.com
The Full Moon appears in the night sky when the Sun and the Moon are aligned on opposite sides of Earth.
How can Full Moon be in the daytime?
Technically, this alignment only lasts a moment. However, the Moon can appear to be full a day before or after while more than 98% of the Moon's disc is illuminated.
When a Full Moon occasionally passes through Earth's shadow, it will cause a lunar eclipse.
When the Full Moon comes close to the points of its orbit that are closest or farthest away from Earth, we call it a Supermoon or Micromoon, respectively.
What is the Moon Illusion?
Waning Gibbous Moon
The next intermediate Moon phase is the Waning Gibbous Moon. The portion of the visible half of the Moon illuminated decreases during this period.
Third Quarter Moon
Third Quarter Moon is the last primary phase.
The Third Quarter Moon occurs the moment the opposite half of the Moon is illuminated compared to the First Quarter Moon.
Waning Crescent Moon
The Waning Crescent Moon. The Sun illuminates less than half of the visible part of the Moon during this Moon phase and you can sometimes see earthshine on the rest of the Moon towards the end.
Explanation:
Answer:
The new Moon appears during a period when the earth, the Moon, and the Sun are all in a single line. Since the Moon is in between the Sun ad the Earth , the side of the Moon that directly facing the Earth is dark.
During full Moon, the three bodies are also approximately in a line, but the moon at this stage is on the other side of earth, so the Sun lights up the the section of the earth facing it.
At first quarter and last quarter, the Moon is located at a position perpendicular to a line between Earth and the Sun. one section of the moon is dark while the other will be brightened
Crescent refers to phases where the less than half of the moon is illuminated while gibbous is the phase where more than half of the moon is illuminated.
After the new Moon phase, The waxing crescent is visible due to exposure some reflected sunlight rays . The lunar crescent continue to grow until first-quarter Moon. As the right section of the Moon extend to more than half of the Moon's face, the Moon becomes waxing gibbous.
Then, right after the full Moon, the right section begins to reduce again to make a waning gibbous and which then turn into a third-quarter Moon. The exposure to sunlight continues to lessen until the moon is a waning crescent and then a new Moon. The full cycle is carried out in 29.5 days.
Repeating your experiment _____. A. increases validity B. decreases validity C. has no effect on validity
Answer:
C. has no effect on validity
Explanation:
Repeating your experiment has no effect on validity.
It doesn't matter how many times you repeat your experiment. You have to find the average outcome of each experiment you do.
Helpppppp
The star named Sirius has a declination of approximately -16°. In what direction is Sirius located from the celestial equator?
east
west
north
south
Negative celestial declinations are all positions in the sky that are directly over south surface latitudes.
Sirius is SOUTH of the celestial equator.
During the course of a year, it traces a circular path directly over the parallel of 16° South latitude, taking it over Peru, La Paz in Bolivia, St. Helena island in the Atlantic, Namibia, Angola, Zambia, Mozambique, Malawi, Madagascar, Australia, French Polynesia, American Samoa, and the Pacific Ocean.
Answer:
Sirius is *SOUTH* of the celestial equator :))
Explanation:
its the correct answer on the test,,, good luck !! :3
Earth has a mass of 5.97 x 10*kg, and a mean radius of 6.38 x 108m. What would be the orbital speed and period of a satellite in
orbit 1.44 x 109 m above Earth?
Explanation:
Centripetal acceleration = acceleration due to gravity
v² / r = GM / r²
Solving for velocity:
v = √(GM / r)
Given:
G = 6.67×10⁻¹¹ m³/kg/s²
M = 5.97×10²⁴ kg
r = 6.38×10⁸ m + 1.44×10⁹ m = 2.078×10⁹ m
v = √(6.67×10⁻¹¹ × 5.97×10²⁴ / 2.078×10⁹)
v = 438 m/s
Period is the time to travel one circumference:
T = 2πr / v
T = 2π (2.078×10⁹) / 438
T = 2.98×10⁷ s
T = 8290 hr
T = 345 days
Energy does not have to involve motion. Question 11 options: True False
During which two time intervals does the particle undergo equal displacement?
AB and BC
AB and EF
BC and DE
CD and DF
Answer:
BC and DE
Explanation:
In the given figure, the velocity time graph is shown. We know that the area under v-t curve gives the displacement of the particle.
Area under AB, [tex]d_1=\dfrac{1}{2}\times 2\times 10=10\ m[/tex]
Area under BC, [tex]d_2=\dfrac{1}{2}\times 2\times 4=4\ m[/tex]
Area under CD, [tex]d_3=\dfrac{1}{2}\times 2\times 7=7\ m[/tex]
Area under DE, [tex]d_4=\dfrac{1}{2}\times 2\times 4=4\ m[/tex]
Area under EF, [tex]d_5=\dfrac{1}{2}\times 2\times 3=3\ m[/tex]
So, form above calculations it is clear that, during BC and DE undergo equal displacement. Hence, the correct option is (c) "BC and DE = 4 meters".
Correct Answer:
AB & DE
Explanation:
I had just taken this test on Plato/Edmentum (physical science) and gotten the question correct
The power in an electrical circuit is given by the equation P= PR, where /is
the current flowing through the circuit and Ris the resistance of the circuit.
What is the power in a circuit that has a current of 0.02 amps and a
resistance of 30 ohms?
A. 0.012 watts
B. 1500 watts
C. 18 watts
D. 0.6 watts
Answer:
A. 0.012 Watts
Explanation:
P = IV = I² R
Given I = 0.02 A and R = 30 Ω:
P = (0.02)² (30)
P = 0.012 W
The power in an electrical circuit is given by the equation P= PR, the power in the circuit is 0.6 watts. The correct option is D.
In physics and electrical circuits, power refers to the rate at which work is done or energy is conveyed. It quantifies the rate at which energy is used or generated in a system.
The power in an electrical circuit may be calculated using the equation P = I * R, where P is the power, I is the current flowing through the circuit, and R is the circuit's resistance.
The current (I) is 0.02 amps in this example, while the resistance (R) is 30 ohms.
P = I * V
P = 0.02 A * 30 Ω
P = 0.6 watts
Therefore, the power in the circuit is 0.6 watts.
Thus, the correct answer is D. 0.6 watts.
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