(a) The work done by the frictional force is -33.1 J.
(b) The work done by the gravitational force is 175.58 J
Work done by frictional force
The work done by frictional force is calculated as follows;
W = -μmgsinθ x L
W = -μmgsinθ x L
where;
m is mass of Jane and wagonW = -0.18 x (12.7 + 14)9.8 x sin(17) x 2.4
W = -33.1 J
Work done by the gravitational forceW = mgh
W = mgcosθ x h
W = mgcosθ x Lsinθ
W = (26.7)(9.8)cos(17) x 2.4 x sin(17)
W = 175.58 J
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what is linear momemtum
Answer:
Its momentum thats linear
Explanation:
from my secret analysis i would say this is really linear
how is the analogy activity of the balloon with galaxies drawn on them not correctly?
The analogy activity of the balloon with galaxies drawn on them is incorrect because galaxies may have different shapes.
What is a galaxy?A galaxy is a group of stellar systems like our solar system linked by gravity in a particular space and time in the Universe.
Galaxies may adopt different forms such as spiral galaxies, elliptical galaxies, irregular galaxies, etc.
In conclusion, the analogy activity of the balloon with galaxies drawn on them is incorrect because galaxies may have different shapes.
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please give me correct answer
Answer:
1) convection.
2) thermometer.
3) Celsius scale.
4) Radiation.
5) Conduction.
6) Clinical thermometers.
Explanation:
so the questions have already given you a simple idea of their meanings.
Good luck.
why Neil deGrasse Tyson says NASCAR doesn’t like the Doppler effect.
We can confirm that Neil deGrasse Tyson made this claim due to the fact that NASCAR races use speakers with the sounds of the race.
Why would using speakers ruin the Doppler effect?The Doppler effect in regards to sound is a shift in the way we hear the sound as the object is coming closer and then moving farther away, something that NASCAR cars do very often during races. Placing speakers would overlap this sound with a constant sound wave, making the audience unable to perceive the doppler effect.
Therefore, we can confirm that Neil deGrasse Tyson made this claim due to the fact that NASCAR races use speakers with the sounds of the race.
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If humans are exposed to radiation, this can cause a change in their DNA base sequence. What is the term given to this?
The term used to indicate different DNA nucleotide changes in humans exposed to radiation is called a mutation.
What is a mutation?A mutation is any DNA nucleotide change or modification that occurs in the genome of a given organism.
Mutations may be caused by physical agents (e.g., UV radiation) or chemical agents.
In conclusion, the term used to indicate different DNA nucleotide changes in humans exposed to radiation is called a mutation.
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Describe the importance of using protective equipment when participating in sports or physical activity
The crust is composed primarily of basalt and _____________.
Answer:
Granite
Explanation:
Trust me I learned this 2years ago
What's the temperature 414 K in degrees Celsius?
Answer:
140.85 is the correct answer
Why does the moon block the Sun during a solar eclipse
Answer:
In a solar eclipse, the sun is completely blocked because the moon moves between the earth and the sun. Although the moon is much smaller than the sun because it is located so far away from the earth, the moon can completely block sunlight from the earth's point of view.
Which is NOT a negative consequence of clearing land during deforestation?
It gives humans space to build houses or shelters.
discuss how the nucleus is held together.
Answer:
the nucleus of an atom is held together by a strong nucleus force that binds together protons and neutrons.all though the strong nucleus force is stronger than the four fundamental forces.it acts over very short typically nucleus substances
The speed of light is 3 x 108 m/s (300,000,000 m/s). A light wave has a wavelength of 400 nm (0.0000004 m). What is the frequency of the light
wave?
Explanation:
velocity = wavelength × frequency
3×10⁸ = 400/10⁹ × frequency
frequency = 3 × 10¹⁵ /400
frequency = 75×10¹¹Hz
The displacement of a 500 g mass, undergoing simple harmonic motion, is defined by the function :
x=-3.5sin(π/2t+(5π)/4)
Find
a. maximum kinetic energy
b. maximum potential energy
c. maximum mechanical energy
The maximum kinetic energy, maximum potential energy and the maximum mechanical energy are equal to 7.56J.
What is simple harmonic motion?Simple harmonic motion, in physics, repetitive movement back and forth through an equilibrium, or central, position, so that the maximum displacement on one side of this position is equal to the maximum displacement on the other side.
Simple Harmonic Motion
The given equation of the simple harmonic motion is
[tex]x=3.5 sin (\frac{\pi }{2t} + \frac{5\pi }{4} )[/tex]
Data;
ω = π/2
k = 1.254N/m
Solving this
[tex]\frac{dx}{dt} = -3.5 X \frac{\pi }{2} cos (\frac{x\pi t}{2}+\frac{5\pi }{4} )[/tex]
Let's calculate the maximum velocity.
[tex]V_{m} =\frac{3.5\pi }{2}[/tex]
This is only possible when cos θ = -1
The maximum kinetic energy is
[tex]K_m =\frac{1}{2} mv^2 = \frac{1}{2} X \frac{500}{1000} X \frac{7^2\pi ^2}^{4} ^2[/tex]
[tex]w^2 = \frac{k}{m} \\k = w^2m\\k = \frac{\pi ^2}{4} X \frac{500}{1000} \\k =1.254 N/m[/tex]
Using the value of spring constant, we can find the maximum potential energy.
[tex]P.E =\frac{1}{2} k x^2\\P.E =\frac{1}{2} X 1.234 X 3.5^2 \\P.E = 7.56 J[/tex]
The maximum potential energy is 7.56J
The maximum mechanical energy is equal to the sum of maximum potential energy and the maximum kinetic energy.
ME = K.E + P.E
ME = 7.56J
From the calculations above, the maximum kinetic energy, maximum potential energy and the maximum mechanical energy are equal to 7.56J.
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Find the radius and the circumference to the nearest hundredth when d ≈ 3.6 in. Use 3.14 for π. Drag and drop the correct number into each box to complete the answers.
The radius is approximately _ inches.
The circumference is approximately _ inches.
Explanation:
the radius is always half of the diameter.
so, the radius is approximately 3.6/2 = 1.8 in.
and the circumference of a circle is
2×pi×r = d×pi = 3.6×3.14 = 11.304 ≈ 11.3 in.
3. The height of a wave crest is called
a. wavelength.
c. amplitude.
b. frequency
d. energy
Answer:
C. Amplitude
Explanation:
How much energy is required to Melt 450g of Ice?
Answer:
The latent heat of fusion for water is 334 joules per gram.
Explanation: im smart
What is the current if the electricpotential is 120 V and the resistance is
60 ohms?
Answer:
2 amperes
Explanation:
V = IR
V/R = I
120 v / 60 ohms = 2 amps
HELP I DEPEND ON THIS
Answer:
D. A force within a fluid that pushes upward
Explanation:
Buoyancy is the ability of something floating in water, so it's probably not about the attraction between molecules and is about a force within a fluid. If a force within a fluid is pushing downwards on an object, that would make the object go downwards (sink), which is not buoyancy. If a force within a fluid is pushing upwards on an object, the object would be floating.
Answer:
Option D
Explanation:
When you put any object and push it inwards water .
According to Newton's third law every action has equal and opposite reaction
So the water hits back with opposite force which is known as buoyant force.
Archimedies law is applicable in these cases
How do you know that light travels faster than
sound? (Hint: Give an example of something that
produces sound and light at the same time.)
Answer:
Explanation:
Answer
How about a thunder storm. I don't know if you live in a city or out in the sticks as I do. Lighting is very obvious and it is not a good idea to be out when experiencing a thunderstorm, especially in an open field. You might be the only thing around that will cause the lightning to be connected to the ground.# Seconds later, you will hear the thunder which is quite harmless. If you live in the city, observing this is not quite so easy. There are all kinds of buildings around and some of them may block your view.
#The great golfer, Lee Travino, was "hit" by lightening storm twice while playing in tournaments.
Which TWO types of waves can transmit energy through a vacuum?
A.) radio waves
B.) seismic waves
C.) sound waves
D.) water waves
E.) x-rays
Answer:
Answer = Radio waves and X-rays
Explanation:
Hope that helps! :)
What is the acceleration when a force of 2.0N is applied to a ball that has a mass of 0.60 Kg ?
Formula :- Force = mass × acceleration
F= m × a
[tex]2 = 0.6 \times a \\ 2 \times \frac{10}{6} = a \\ \cancel2 \times \frac{10}{ \cancel6 {}^{ \: \: 3} } = a \\ \frac{10}{3} = a = 3.33[/tex]
Option A -> 3.3
Answer:
3.3 m/s²
Explanation:
Formula :
Force = mass × accelerationGiven :
Force (F) = 2.0 Nmass (m) = 0.60 kgSolving :
2.0 N = 0.60 kg × acceleration (a)a = 2.0/0.60a = 20/6 = 10/3a = 3.3 m/s²A transverse wave on a string has an amplitude of 20 cm, a wavelength of 35 cm, and a frequency of 2.0 Hz. The wave moves in the positive x-direction.
--Enter any fractional coefficients as fractions, i.e., do not approximate fractions using decimals. Enter as itself; do not multiply it with other numerical factors. Enter phase angles in inverse function form if they do not evaluate one of the special angles on the unit circle.
--Write the mathematical description of the displacement y1(x,t) from equilibrium for the wave if, at t=0, x=0, and y1=0.
y1(x,t)= ___m
--Write the mathematical description of the displacement y2(x,t) from equilibrium for the wave if, at t=0, x=0, and y2=20 cm.
y2(x,t)= ___m
Write the mathematical description of the displacement y3(x,t) from equilibrium for the wave if, at t=0, x=0, and y3=−20 cm.
y3(x,t)= ___m
Write the mathematical description of the displacement y4(x,t) from equilibrium for the wave if, at t=0, x=0, and y4=13 cm.
y4(x,t)= ___m
(a) The mathematical description of the displacement of the wave, y1(x,t) = 0.2 m.
(b) The mathematical description of the displacement of the wave, y2(x,t) = 0.4 m.
(c) The mathematical description of the displacement of the wave, y3(x,t) = 0.2 m
(d) The mathematical description of the displacement of the wave, y4(x,t) = 0.33 m
Wave functionThe general wave function is written as follows;
y(x, t) = Acos(kx - ωt)
where;
k is the wave number = 2π/λA is amplitude of the wave = 20 cmω is angular speedλ is the wave length = 35 cmy0 = Acos(kx - ωt)
y0 = 20cm x cos(0 - 0)
y0 = 20 cm
From equilibrium of the wave, at t=0, x=0, y1 = 0y1(x,t) = 20cm x cos(0 - 0) = 20 cm
y1(x,t)= 20 cm = 0.2 m
Thus, y1 = y1 + y0
From equilibrium of the wave, at t=0, x=0, y2 = 20 cmy2 = y0 + y1 + y2
y2 = 20 cm + 0 + 20 cm
y2(x,t)= 40 cm = 0.4 m
From equilibrium of the wave, at t=0, x=0, y3 = -20 cmy3 = y0 + y1 + y2 + y3
y3 = 20 cm + 0 + 20 cm - 20cm
y3(x,t)= 20 cm = 0.2 m
From equilibrium of the wave, at t=0, x=0, y4 = 13 cmy4 = y0 + y1 + y2 + y3
y4 = 20 cm + 0 + 20 cm -20 cm + 13 cm
y4 = 33 cm
y4(x,t) = 33 cm = 0.33 m
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A team of scientists is working to determine if a meteor created a landform. One team includes geologists
Which other branch of Earth science would these scientists most likely represent?
O astronomy
O meteorology
O oceanography
O environmental science
Answer:
your answer should be astronomy
Explanation:
(50 Points)
Explain how an electric current affects the charged atoms in a piezoelectric crystal and how this allows the crystal to push a robotic forward
Answer: The piezoelectric effect describes the property of certain solids to generate an electrical charge under mechanical stress. The actuating force modifies the microscopic structure of the body; dipoles are created between which a voltage builds up. And Their positive and negative charges complement each other creating two types of electricity: static electricity
Explanation:
Which of the following statements is true.
a. Gravity is a force dependent on mass and force.
b. Gravity is a force dependent on mass and distance.
C. No Gravity is a force dependent on speed and force.
d. Gravity is a force dependent on force and distance.
2. A student was sitting on one end of a set of metal bleachers outside of a school building. A drumline was practicing on the other end of the bleachers. Some of the musicians are drumming on the bleachers while others are drumming on their drums. The drumming on drums doesn’t bother the student, but the drumming on the bleachers does because he can feel it in the seat. He moves further away, which helps, but not enough. Finally, he decides to sit on his backpack. Compare the two types of waves the student is detecting. In your response, be sure to include: Why the student can feel the vibrations from the bleachers, but not from the drums. Identification of the two types of waves created by the drumming. A description of two similarities between the two wave types A description of two differences between the two wave types. Why moving away and sitting on the backpack helps him feel the waves less.
The students can feel the vibrations from the bleachers, but not from the drums because of the resonance.
What is the resonance?The resonance condition occurs when the frequency of a wave matches with the resonance frequency.
The transfer of energy becomes maximum when the natural frequency matches with the frequency generated by the source.
The bleacher and student together having the frequency matching with the resonance frequency of the drum.
The bleacher and student with the bag frequency doesn't match with the resonance value of drums. Secondly, as distance increases sound intensity also decreases.
Thus, the student can feel the vibrations from the bleachers, but not from the drums because of the resonance.
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waves in a pond or lake are
Charges are pushed through an electric circuit by?
What affect does distance have on an electric field?
The closer an uncharged particle is to an electric field, the stronger the force exerted.
The further an uncharged particle is from an electric field, the stronger the force exerted.
The further a charged particle is from an electric field, the stronger the force exerted.
The closer a charged particle is to an electric field, the stronger the force exerted.
Answer:
the answer is equal to yes
Question 7 of 32
What is a disadvantage of using nonrenewable energy resources?
A. They cause problems with bird populations.
O B. They do not produce greenhouse gases.
C. They cannot be replenished in a human lifetime.
D. They are readily available.
Answer:
I think the answer will be C
Explanation:
D doesnt make sense
A doesn't make sense
B nonrenewable resources do release greenhouse gasses