Answers
We will determine the height as follows:
First, we determine the time it will take to get from 0m/s to 33.5m/s using gravity, that is:
\(\begin{gathered} 33.5m/s=(0m/s)+(9.8m/s^2)t\Rightarrow t=\frac{33.5m/s}{9.8m/s^2} \\ \\ \Rightarrow t=\frac{335}{98}s \end{gathered}\)Now, we determine the height of the roller coaster:
\(\begin{gathered} h=(0m/s)(\frac{335}{98}s)+\frac{1}{2}(9.8m/s^2)(\frac{335}{98}s)^2\Rightarrow h=\frac{22445}{392}m \\ \\ \Rightarrow h\approx57.26m \end{gathered}\)So, the height of the roller coaster must be approximately 57.26 m.
Related Questions
Calculate the volume of a parallelepiped with sides give as
a
=
(
7,2
,
4
)
,
b
=
(
4,7
,
6
)
and
c
=
(
3,4
,
7
)
Select one:
105
cubic units
125
cubic units
115
cubic units
135
cubic units
Answers
To calculate the volume of a parallelepiped given the sides, we can use the scalar triple product. The formula for the volume of a parallelepiped with sides a, b, and c is:
Volume = |a · (b × c)|
where · represents the dot product and × represents the cross product.
Using the given sides:
a = (7, 2, 4)
b = (4, 7, 6)
c = (3, 4, 7)
First, calculate the cross product of b and c:
b × c = (7*7 - 4*4, 6*3 - 7*7, 4*4 - 2*3)
= (49 - 16, 18 - 49, 16 - 6)
= (33, -31, 10)
Next, calculate the dot product of a and the cross product (b × c):
a · (b × c) = 7*33 + 2*(-31) + 4*10
= 231 - 62 + 40
= 209
Finally, take the absolute value of the result to obtain the volume:
Volume = |209| = 209 cubic units
Therefore, the correct answer is:
209 cubic units
When two RF signals on the same frequency arrive at a receiver at the exact same time and their peaks and valleys are in alignment, what is true about these signals?
Answers
Answer:
The two RF signals are in phase.
Explanation:
A wave is a disturbance that travels through a medium which transfers energy from one point to another in the medium without causing any permanent displacement of the particles of the medium.
Characteristics of waves include frequency, wavelength, velocity, etc.
Two types of waves are longitudinal and transverse wave. Radio Frequency (RF) signals travel in the form of transverse waves which have regions of maximum and minimum displacements called crests and troughs.
Travelling waves with the same frequency may be said to be in phase or out of phase depending on whether their crests/peaks or troughs/valleys are reached at the same instant of time.
When two RF signals on the same frequency arrive at a receiver at the exact same time and their peaks and valleys are in alignment or in step, they are said to be in phase.
The phase of a wave involves the relationship between the position of the amplitude peaks and valleys of two waveforms.
What is the correct description of any change in a position farther to the left of zero?
1- negative displacement
2- negative position
Answers
Answer:
negative displacement
Explanation:
cause its written farther that means its doin movement
The maximum displacement in an oscillatory motion is A = 0.49 m. Determine the position x at which the kinetic energy of the particle is half its elastic potential energy. (If KE = U/2 x= ?).
Answers
Answer:
x = 0.40 m
Explanation:
When the displacement is maximum, the particle is momentarily at rest, which means that at this point (assuming no friction present) all the mechanical energy is elastic potential, which can be written as follows:\(E_{tot} = U_{o} = \frac{1}{2} *k*A^{2} (1)\)
Since in absence of friction, total mechanical energy must keep constant, this means that at any time, the sum of the kinetic and potential energy, must be equal to (1), as follows:\(E_{tot} = U_{o} = \frac{1}{2} *k*A^{2} = (KE)_{f} + U_{f} (2)\)
If KEf = U/2f, replacing in (2), we get:\(E_{tot} = U_{o} = \frac{1}{2} *k*A^{2} = (U/2)_{f} + U_{f} = \frac{3}{2} *U_{f} (3)\)
At any point, the elastic potential energy is given by the following expression:\(U_{f} = \frac{1}{2} *k*x^{2} (4)\)
where k= spring constant (N/m) and x is the displacement from the
equilibrium position.
Replacing (4) in (3), simplifying and rearranging, we get:\(E_{tot} = U_{o} = \frac{1}{2} *A^{2} = \frac{3}{4} *x^{2} (5)\)
Finally, solving for x, we get:\(x = \sqrt{\frac{2}{3} } * A = \sqrt{\frac{2}{3} } * 0.49m = 0.40 m (6)\)
Why are weathering, erosion and deposition a NECESSARY process in the rock cycle?
ANSWER THIS NOW PLEASE! AND YOU GET 225 POINTS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answers
Answer:
YESS well it is partly nessary but it depends on the situation
Explanation:
Answer:
Weathering, erosion, and deposistion are necessary processes in the rock cycle because:
Explanation:
First, start with igneous rocks. magma erupts (Extrusive igneous rocks) or solidifies in the sub-surface of the earth (Intrusive igneous rock). when they are exposed Weathering and erosion occur which is a slow breakdown of rock through the wind, water, or other processes. The weathered pieces (sediments) move to other places by wind or water and get deposited someplace else. When there are enough sediments and there is overburden pressure on these sediments, they become a sedimentary rock. Due to overburden pressure, they become metamorphic rocks. now the thing to understand here is that when metamorphic rocks are exposed, they too undergo weathering and erosion and their pieces also become sedimentary rocks.
Alexis is studying how lenses work. She looks through a
magnifying glass and through the peephole of a door.
Which best describes a difference between the lenses
used in these two devices?
O The lens in the magnifying glass can produce both
real and virtual images, but the lens in the peephole
can produce only real images.
O The lens in the magnifying glass can produce only
real images, but the lens in the peephole can produce
both real and virtual images.
O The lens in the magnifying glass can produce both
upright and inverted images, but the lens in the
peephole can produce only upright images.
O The lens in the magnifying glass can produce only
inverted images, but the lens in the peephole can
produce inverted and upright images.
Answers
Answer:
The lens in the magnifying glass can produce both upright and inverted images, but the lens in the peephole can produce only upright images.
The lens in the magnifying glass can produce both upright and inverted images, but the lens in the peephole can produce only upright images.
What is the lens?A lens is a transmissive optical device which focuses or disperses a light beam by means of refraction. A simple lens consists of a single piece of transparent material, while a compound lens consists of several simple lenses (elements), usually arranged along a common axis
A lens can focus light to form an image, unlike a prism, which refracts light without focusing. Devices that similarly focus or disperse waves and radiation other than visible light are also called lenses,
Lenses are classified by the curvature of the two optical surfaces. A lens is biconvex (or double convex, or just convex) if both surfaces are convex. If both surfaces have the same radius of curvature, the lens is quasiconvex
Hence lens in the magnifying glass can produce both upright and inverted images, but the lens in the peephole can produce only upright images.
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Which represents a longitudinal wave?
A) the motion of an ocean wave.
B) the motion of shaking a rope.
C) the motion of a tight rubber band.
D) the motion of a spring.
Answers
The motion of a spring represents a longitudinal wave.
Option d is correct.
Which wave has a longitudinal component?Because the medium's vibrations run parallel to the direction the sound wave travels, sound waves in air (and any other fluid media) are longitudinal waves.
The finest illustration of a longitudinal wave is which of the following?Sound waves are the right response. In longitudinal waves, the particle's medium vibrates in a direction parallel to the wave's propagation. By vibrating in the wave's line of transmission, particles in longitudinal waves move energy from one location to another.
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PLEASE CLICK ON THIS IMAGE I NEED HELP
Answers
Answer:
rocks are vertical.
Explanation:
I'm so sorry if I'm wrong this is what I think
Parallel to the plane of the horizontal
Grains (pounds)
Nonfat/1% milk (gallons)
Poultry (pounds)
Seafood (pounds)
12
Vegetables (pounds)
271
1
Yogurt (pounds)
Fats and oils (pounds)
55
24
52
Soft drinks (gallons)
123
150
Sugars (pounds)
Source: U.S. Department of Agriculture, Hope Health Letter, April 1999
135
2
34
More people are:
What assumption can be made about the eating habits over the years?
6
63
15
320
4
67
O
A. becoming vegetarians
OB. eating more beef than chicken
OC. consuming whole milk dairy products
D. trying to eat healthier foods
E. eliminating soft drinks from their diets
Answers
Answer:
D. trying to eat healthier foods
Explanation:
Plants use sunlight as energy to convert carbon dioxide and water into glucose and oxygen which best describes the reaction
Answers
The process can be described as Photosynthesis with an equation \(6CO_{2} + 6H_{2}O - > C_{6}H_{12}O_{6} + 6O_{2}\).
What is Photosynthesis?
As a means of converting light energy into chemical energy, photosynthesis is a process used by plants and other living things. This chemical energy is then released through cellular respiration to power the activity of the organism.
The process of photosynthesis is how plants produce food. Plants use the energy of light during photosynthesis to produce food. Water and carbon dioxide are transformed by plants into the sugar glucose with the help of the sun's energy.
Two reactants—carbon dioxide and water—are used in the photosynthetic process. Both oxygen and glucose are produced by these two reactants. This makes the photosynthetic reaction an endothermic reaction.
According to the photosynthetic formula:
\(6CO_{2} + 6H_{2}O - > C_{6}H_{12}O_{6} + 6O_{2}\)
Therefore, the photosynthesis reaction can be described as:\(6CO_{2} + 6H_{2}O - > C_{6}H_{12}O_{6} + 6O_{2}\)
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We can think of it as photosynthesis with an equation.
\(6CO_{2} +6CH_2}-- > C_{6}H{12}O_{6} + 6CO_{2}\)
Plants and other living things employ the process of photosynthesis to transform light energy into chemical energy. The organism's activity is subsequently powered by the chemical energy that is then released during cellular respiration.
Plants produce food through a process known as photosynthesis. During photosynthesis, plants use the energy of light to create nourishment. With the aid of the sun's energy, plants convert water and carbon dioxide into the sugar glucose.
In the photosynthetic process, carbon dioxide and water are used as reactants. These two reactants result in the production of oxygen and glucose. Because of this, the photosynthetic reaction is endothermic.
The photosynthetic equation states:
\(6CO_{2} +6CH_2}-- > C_{6}H{12}O_{6} + 6CO_{2}\)
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In order to train astronauts to get used to the accelerations they experience during space shuttle launches, they must ride around in a centrifuge to experience accelerations of up to 100 m/s2. If a centrifuge measures 20 m in radius, what is the rotational velocity of a centrifuge during testing?
Answers
The rotational velocity of the centrifuge is \(\sqrt{5}\) rad/s.
What is Centripetal force ?
Centripetal force is defined as the force that acts on a body moving in circular path which is directed towards the centre of the circular path.
Here,
The rotational acceleration attained by the astronauts, a' = 100 m/s²
The radius of the centrifuge, r = 20 m
From the equation of circular motion,
a' = rω²
So, ω² = a'/r
ω² = 100/20
ω² = 5
Rotational velocity, ω = \(\sqrt{5}\) rad/s
Hence,
The rotational velocity of the centrifuge, ω is \(\sqrt{5}\) rad/s
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While taking a psychology exam, Lori got up and shut the classroom door due to outside noise that affected her concentration. Which theory explains Lori’s behavior?
Group of answer choices
Drive-reduction theory
Expectancy theory
Instinct theory
Arousal theory
Answers
Answer:
drive reduction theory
Explanation:
I would say that because of all the cars beeping and making A Lot of cachos on the street so that will definitely affect her taking her exam
Theory explains Lori’s behavior is b) Drive-reduction theory
What is Drive-reduction theory?
It is based on the idea that the primary motivation behind all human behavior is to reduce drives . A drive is a state of discomfort which is triggered by a person's physiology or biological need .
so , she removed discomfort that can happen by the noise outside the classroom in order to maintain student's concentration
correct answer is b) Drive-reduction theory
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Two identical freight cars roll toward one another, on a level track with negligible friction. One car is moving at 2 m/s and the other car at 1 m/s. After the collision, both cars are coupled and roll together with what speed?.
Answers
On a level track with little friction, two identical freight cars roll toward each other. The collision causes the two freight cars to move together at a velocity of 1.5 m/s.
Conservation of momentum applies in this situation, as there are no external forces acting on the system. The momentum of the system before the collision is:
Pinitial = m₁v₁ + m₂v₂
where m₁ and m₂ are the masses of the freight cars, and v₁ and v₂ are their velocities before the collision.
Since the two freight cars are identical, their masses are equal, so we can write:
Pinitial = 2m × 2 m/s + 2m × 1 m/s = 6m kg m/s
where 2m is the mass of each freight car.
After the collision, the two freight cars move together as one unit, with a common velocity v. The final momentum of the system is:
Pfinal = (2m + 2m) × v = 4m × v
According to the law of conservation of momentum, the initial momentum of the system must equal the final momentum of the system. Therefore:
Pinitial = Pfinal
6m kg m/s = 4m × v
Solving for v, we get:
v = 1.5 m/s
So after the collision, the two freight cars move together with a velocity of 1.5 m/s.
Friction is a force that opposes motion between two surfaces in contact, caused by the irregularities in their surfaces.
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15 POINTSSS PLS ANSWER
Why can't you determine the EXACT age of a layer of rock by simply observing fossils in a rock layer? What constraints you in making this determination?
Answers
To determine the exact age of a layer of rock, geologists typically use radiometric dating techniques such as measuring the decay of radioactive isotopes in rocks.
Why can't you determine the EXACT age of a layer of rock by simply observing fossils in a rock layer?While fossils found within a layer of rock can provide important clues about the age of the rock, they cannot determine the exact age of the layer with precision.
This is because the fossil record is incomplete and fossils found in a layer of rock are unlikely to represent all species that existed during a particular time period.
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Magnetism Assessment
Magnet A is a very weak magnet and Magnet B is a very strong magnet. They attract each other. The relative attractive force is
greater from magnet A
greater from magnet B
the same for both magnets
unable to be determined
1
2
3
4
5
6
7
8
9
Answers
Answer:
greater from magnet B to A
The relative attractive force is greater for magnet B and the magnetic force is also greater for magnet B
What is magnetic force?Magnetic force is the term used to describe the force that pulls items like iron. Magnetic force is the attraction or repellence that exists between two magnetic materials. Ferromagnetic materials include iron.
The magnetic force is strongest at the poles of the magnet and weak at the center of the magnet. The magnetic force can be either attractive or repulsive and like poles repel each other whereas unlike poles attracts.
Given data ,
Let the first magnet be = A
Let the second magnet be = B
Now , the Magnet A is a very weak magnet and Magnet B is a strong magnet
And , the magnets A and B attract each other so they are unlike magnets
Since , the magnet B is a strong magnet it will gave a relatively larger attractive force when compared to the weak magnet A
Hence , the magnet B will have greater magnetic force
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1. Lucky Larry was in a car crash. He hit a brick wall going 40 mph. But his airbag
inflated and saved him because
A. it reduced the time of the collision.
B. it reduced his initial velocity.
C. it reduced his change in momentum.
D.it reduced his average
force.
Answers
Answer:
The answer is D (It reduced his average
force.)
Hi please help on question! . If answer is correct I'll rate you five stars a thanks and maybe even brainliest! You will even get 54 pts!!
Here is a function machine.
Input : multiply by 6. Subtract 80: output
The input is the same as the output. Find the input.
Also can you please show me an easy to work out these type of questions
Answers
Answer:
Explanation:
Sure, I'd be happy to help you with the question!
Let's denote the input as x. According to the function machine, the input is multiplied by 6 and then 80 is subtracted from the result to obtain the output.
So, the function can be written as:
Output = (6 * x) - 80
Now, the problem states that the input is the same as the output. Therefore, we can set up the equation:
x = (6 * x) - 80
Let's solve this equation to find the value of x:
x = 6x - 80
Subtracting 6x from both sides, we get:
x - 6x = -80
Combining like terms, we have:
-5x = -80
Dividing both sides by -5, we find:
x = (-80) / (-5)
Simplifying the expression, we have:
x = 16
Therefore, the input (x) that results in the input being the same as the output is 16.
To work out these types of questions, it's important to carefully read the instructions and understand the operations being performed in the function machine. Then, you can set up an equation with the input and output, and solve for the unknown value. Always double-check your solution to ensure it satisfies the given conditions of the problem.
Answer:
16
Explanation:
(x*6) - 80 = x
Multiply the parentheses
6x - 80 = x
Add 80 to each side to get
6x = x + 80
Subtract x from both sides to get
5x = 80
Divide both sides by 5
x = 16
An Earth satellite moves in circular orbit 602 km above the earths surface with a period of 96.53 min. What are the speed and the magnitude of the centripetal acceleration of the satellite.
Answers
The speed and the magnitude of the centripetal acceleration of the satellite are 7.568 km/s and 8.205 x 10^-3 m / s^2
Here this problem we are dealing with the speed and centripetal acceleration where the speed of the satellite is the speed required to attain adjustment between gravity's pull on the satellite and the inertia of the satellite's motion whereas centripetal acceleration is referred to as the acceleration of a body navigating a circular way.Since we are given the orbital radius which is 602 km and the period which is 96.53 min.
The radius of the satellite's orbit, r = earth radius + orbit radius
=>r =6378 km + 602 km = 6980 km
Since the formula for the orbital circumference is :
2πR
=>2 • 3.14 •6980 = 43,834.4 km
Now divide the circumference by the time period we get the orbital speed which is,
43,834.4 km / (96.53 min • 60) = 7.568 km/s
the formula we are referring for calculating the centripetal acceleration is:
a = v²/ r ,
=> a = (7.568 ^2) / 6980 = 8.205 x 10^-3 m / s^2
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An astronaut uses a pendulum with a mass of 0.200 kg to measure the acceleration due to gravity on Planet X. He lifts the pendulum's mass a vertical height of 0.500 m and is able to determine that it gains 15.0 J of gravitational potential energy as it is lifted. Using this information, calculate the acceleration due to gravity (g) on Planet X
Answers
Answer:
Explanation:
PE = mgh
g = PE/mh
g = 15.0 / (0.200(0.500))
g = 150 m/s²
This is one strong astronaut if he can work in an environment where gravity is more than 15 times stronger than on earth.
A ladder 25 feet long is leaning against the wall of a house. The base of the ladder is pulled away from the wall at a rate of 3 feet/sec. How fast is the top of the ladder moving down the wall when the base of the ladder is 7, 15, and 24 feet from the wall?
Answers
The velocity of the ladder when the base of the ladder is 7, 15, and 24 feet from the wall is -0.875, -2.25, and -10.286 respectively.
Given, the length of the ladder= 25 ft
Let x be the distance between the wall and the ladder and h be the height of the ladder from the ground
x² + h² = (25)²
x² +h²= 625
h²= 625- x²
h= \((625- x^{2})^{1/2}\)
\(\frac{dh}{dx}\) = \(\frac{1}{2}\) \((625- x^2)^{-1/2} * (-2x)\)
\(\frac{dh}{dx}\) = \(\frac{-x}{\sqrt{ (625-x^2)}}\)
We have dx/dt= 3 ft/sec
Therefore, by applying the chain rule, we can get the value of dh/dt as:
dh/dt= dh/dx *dx/dt
=\(\frac{-x}{\sqrt{ (625-x^2)}}*3\)
=\(\frac{-3x}{\sqrt{ (625-x^2)}}\)
Now substituting the different values of x in the acquired equation
When x= 7, dh/dt= \(\frac{-7}{8}\) ft/sec= -0.875 ft/sec
When x= 15, dh/dt= \(\frac{-9}{4}\) ft/sec= -2.25 ft/sec
When x= 24, dh/dt= \(\frac{72}{7}\) ft/sec= -10.286 ft/sec
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Four electrons are located at the corners of a square 10.0 nm on a side, with an alpha particle at its midpoint.
How much work is done by the Coulomb force when the alpha particle moves to the midpoint of one of the sides of the square?
Express your answer in joules.
Answers
The work done by the Coulomb force will be "\(6.08\times 10^{-21} \ J\)".
Let us define the required work done to move that alpha particle to the one of the mid point of the side length as follows.
→ \(W = \frac{4kqQ}{r_1} -(\frac{2kqQ}{r_2} +\frac{2kqQ}{r_3} )\)
→ \(=2kqQ(\frac{2}{r_1} -\frac{1}{r_2} -\frac{1}{r_3} )\)
→ \(=2(8.99\times 10^9)(-1.6\times 10^{-19})(2)(1.6\times 10^{-19})\)
→ \(= (\frac{2}{\sqrt{(5\times 10^{-9})^2+(5\times 10^{-9})} } -\frac{1}{(5\times 10^{-9})} -\frac{1}{\sqrt{(10\times 10^{-9})^2} +(5\times 10^{-9})^2} )\)
→ \(= 6.08\times 10^{-21} \ J\)
Thus the above answer is appropriate.
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A man is pulling a 20 kg box with a rope that makes an angle of 60 with the horizontal.If he applies a force of 150 N and a frictional force of 15 N is present, calculate the acceleration of the box.
Answers
∑ F (horizontal) = (150 N) cos(60°) - 15 N = (20 kg) a
==> a = ((150 N) cos(60°) - 15 N)/(20 kg) = 3 m/s²
To calculate the acceleration of the box, we need to consider the net force acting on it. So, the acceleration of the box is 3 m/s².
The net force is the vector sum of the applied force and the force of friction. First, let's find the horizontal and vertical components of the applied force:
Horizontal component of the applied force (F\(_{horizontal}\)) = F\(_{applied}\) × cos(θ)
F\(_{horizontal}\) = 150 N × cos(60°)
F\(_{horizontal}\) = 150 N × 0.5
F\(_{horizontal}\) = 75 N
Vertical component of the applied force (F\(_{vertical}\)) = F\(_{applied}\) × sin(θ)
F\(_{vertical}\) = 150 N × sin(60°)
F\(_{vertical}\) = 150 N × (√3 / 2)
F\(_{vertical}\) ≈ 129.9 N
Now, let's calculate the net force in the horizontal direction:
Net Force in the horizontal direction (F\(_{net horizontal}\)) = F\(_{horizontal}\) - F\(_{friction}\)
F\(_{net horizontal}\) = 75 N - 15 N
F\(_{net horizontal}\) = 60 N
Now, we can calculate the acceleration (a) using Newton's second law of motion, F = ma:
F\(_{net horizontal}\) = m × a
60 N = 20 kg × a
Now, solve for acceleration (a):
a = 60 N / 20 kg
a = 3 m/s²
So, the acceleration of the box is 3 m/s².
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b) A satellite is in a circular orbit around the Earth at an altitude of 1600 km above the Earth's surface. Determine the orbital period of the satellite in hours. [3]
Answers
Explanation:
The orbiting period of a satellite at a height h from earth' surface is
T=2πr32gR2
where r=R+h.
Then, T=2π(R+h)R(R+hg)−−−−−−−−√
Here, R=6400km,h=1600km=R/4
T=2πR+R4−−−−−−√R(R+R4g)−−−−−−−−−⎷=2π(1.25)32Rg−−√
Putting the given values,
T=2×3.14×(6.4×106m9.8ms−2)−−−−−−−−−−−−√(1.25)32=7092s=1.97h
Now, a satellite will appear stationary in the sky over a point on the earth's equator if its period of revolution around the earthh is equal to the period of revolution of the earth up around its own axis whichh is 24h. Let us find the height h of such a satellite above the earth's suface in terms of the earth,'s radius.
Let it be nR.Then
T=2π(R+nR)R(R+nRg)−−−−−−−−−−√
=2π(Rg)−−−−−√(1+n)32
=2×3.14(6.4×106m/s9.8m/s2)−−−−−−−−−−−−−−−⎷(1+n)32
(5075s)(1+n)32=(1.41h)(1+n)32
For T=24h, we have (24h)=(1.41h)(1+n)32
or (1+n)32=241.41=17
or 1+n(17)23=6.61
or n=5.61
The height of the geostationary satellite above the earth's surface is nR=5.61×6400km=6.59×104km.
Which of the following items IS NOT regarded as a source of entropy generation in Engineering Thermodynamics?
Answers
Entropy is a measure of disorder in a system and is generated by a variety of sources in Engineering Thermodynamics. The item that is NOT regarded as a source of entropy generation is heat capacity (C). Entropy is instead generated by heat transfer (Q), changes in pressure (P), and changes in temperature (T).
The correct option is (d) periodic maintenance of machines.Entropy is a measure of disorder in a system that is used in thermodynamics. It is related to the amount of energy that is unavailable to do work. The increase in entropy is a natural consequence of energy transformations that occur in all real processes.
The second law of thermodynamics is the basis of the concept of entropy, which states that the total entropy of a closed system always increases over time, and it never decreases. Therefore, all real processes tend towards equilibrium, which is characterized by maximum entropy.Answer:(d) periodic maintenance of machines.
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A/An _____ is the flow of positive charges that move from higher to lower potential energy, whereas a/an _____ is described as a flow of charged particles.conventional current, electric currentelectric current, conventional currentconventional current, electric circuitelectric circuit, conventional current
Answers
ANSWER:
conventional current, electric current
STEP-BY-STEP EXPLANATION:
We have that a conventional current is described as the flow of positive charges that move from a higher potential energy to a lower one.
And the electric current is described as a flow of charged particles.
Therefore:
A/An conventional current is the flow of positive charges that move from higher to lower potential energy, whereas a/an electric current is described as a flow of charged particles.
write about a time when you felt warm but someone else felt cold
Answers
Answer: when i took the blanket from my sibling at night
Explanation:
help pls will give brainliest
Answers
Answer:
a) because book A has a smaller surface area than B and the formula for pressure is Pressure = Force / Area so the smaller the area of contact the larger the pressure exerted on the table.
Explanation:
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A boy slides a book across the floor, using a force of 5 N over a distance of 2
m. What is the kinetic energy of the book after he slides it? Assume there is
no friction.
A. 5 J
B. 10 J
C. 20 J
D. 2.5 J
SUBMIT
Answers
The kinetic energy of the book after it is slids a distance of 2 meters will be 10 Joules.
How to determine the kinetic energy of an object?The work-energy theorem states that "the work done on an object is the change in its kinetic energy".
Hence;
Kinetic energy = work done
Note that: work-done is expressed as:
Work done = f × d
Where f is force applied and d is distance traveled.
Given that:
Force applied f = 5 newton
Distance d = 2 meters
Work done = ?
Plug these values into the above formula and solve for the workdone.
Work done = f × d
Work done = 5N × 2m
Work done = 10Nm
Work done = 10 Joules
Therefore, the kinetic energy is 10 Joules.
Option B) 10 J is the correct answer.
Learn more about work done: brainly.com/question/26115962
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As positively charged sodium ions enter the axon, _______ flow(s) out to repolarize part of the axon
a. potassium ions
b. a neural impulse
c. the action potential
d. glial cells
Answers
As positively charged sodium ions enter the axon, potassium ions flow out to repolarize part of the axon.
At the beginning of an action potential of cell membrane, the sodium ion gates open and sodium ions flows into the cell. This process is called depolarization. Due to rapid influx of sodium ion, the channel is eventually closed.
The potassium channels are then activated in a process called repolarization. This process occurs when the potassium channels open and allow potassium ions to flow out of the cell.
To maintain the cell membrane potential, cells are kept at low concentration of sodium ions and high concentration of potassium ions.
Thus, as positively charged sodium ions enter the axon, potassium ions flow out to repolarize part of the axon.
Learn more here: https://brainly.com/question/7778945
laws of vector addition
Answers
Answer:
laws ig .
Explanation:
Triangle law of vector addition states that when two vectors are represented as two sides of the triangle with the order of magnitude and direction, then the third side of the triangle represents the magnitude and direction of the resultant vector.