The work done on the car due to friction is -125 J.
What is workdone?Work is said to be done when a force moves an object through a certain distance.
To calculate the workdone on the car by friction, we use the formula below
Formula:
W = m(v²-u²)/2.......... Equation 1
Where:
W = Work done due to fricionm = mass of the carv = Final velocityu = Initial velocityFrom the question,
Given:
m = 10 kgv = 0 m/su = 5 m/sSubstitute these values into equation 1
W = 10(0²-5²)/2W = 5(-25)W = -125 JHence, The work done on the car due to friction is -125 J.
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A force of 20 N is applied tangentially to a wheel of mass 10 kg and diameter 5 m. Calculate the torque applied and angular velocity at the end of 10 second?
Answer:
N = 2010 + 10 + -5 = 20N + -5 = 10 -5 + 20Therefore , the answer is N=20Explanation:
#BrainliestBunchQuestion 4
20 pts
A student connects a length of unknown
material in series with a battery and an
ammeter (which measures current flow).
When the circuit is complete, the ammeter
reads that no current is flowing.
The unknown material is most likely –
Insulator
Semiconductor
Superconductor
Conductor
If current did not flow in the circuit, it simply implies that the material is an insulator.
What is an insulator?An insulator is a material that does not conduct electricity. A circuit is a path that is provided for the flow of current.
If this material was connected into a complete circuit yet current did not flow in the circuit, it simply implies that the material is an insulator.
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A sample of helium behaves as an ideal gas as it is heated at constant pressure from 273 K to 388 K. If 80 J of work is done by the gas during this process, what is the mass of the helium sample? The universal gas constant is 8.31451 J/mol · K. Answer in units of g
The mass of the helium gas sample after the work is done by the gas during the process is 0.099 g.
Number of moles of the helium gasThe number of moles of the helium gas is calculated as follows;
W = nRT
where;
n is the number of molesW is the work doneR is universal gas constant = 8.31451 J/mol · KT is the final temperature = 388 K273 K = 0⁰C and 388 K = 115⁰ C
from 0⁰C to 115⁰C = 115 - 0 = 115⁰ C
115⁰ C = 388 K
The number of moles is calculated as follows;
n = W/RT
[tex]n = \frac{80}{8.315 \times 388} \\\\n = 0.0248 \ mol[/tex].
Mass of the helium sampleMass of the helium sample is calculated as follows;
m = Mn
where;
M is the molar mass of helium gas = 4 g/molm = 4 g/mol x 0.0248 mol
m = 0.099 g
Thus, the mass of the helium gas sample after the work is done by the gas during the process is 0.099 g.
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Which condition is necessary for a lunar eclipse to occur?.
For a lunar eclipse to occur, the Sun, Earth, and Moon must be roughly aligned in a line. Otherwise, the Earth cannot cast a shadow on the Moon's surface and an eclipse cannot take place. When the Sun, Earth, and Moon come together in a straight line, a total lunar eclipse takes
15 points!! PLEASE ANSWER! I NEED IT QUICK!
What happens to the energy of a wave if the amplitude of the wave is doubled?
How does the frequency of a wave relate to the energy of the wave?
Answer:
See below ↓
Explanation:
We know that the energy of a wave is directly proportional to the amplitude of a the wave. That means it directly varies, so when one increases/decreases, the other does the same.
Therefore, when the amplitude of a wave is doubled, the energy of the wave is also doubled.
Similarly, in the case of the frequency of the wave, it is also directly proportional to the energy of the wave.
⇒ E ∝ ν
Two thermometers are calibrated, one in degrees Celsius and the other in degrees Fahrenheit. At what temperature are their readings numerically the same
Answer:
To change degrees Celsius in degrees Fahrenheit, the formula is:
F = 1.8C +32F=1.8C+3
Explanation:
C = 1.8C +32C=1.8C+32
C = -40C=−40
T=-40+273.15=233.15\ KT=−40+273.15=233.15 K
Copper (II) chloride reacts with magnesium nitride
Answer:
I don't know
Explanation:
because I'm not smart
please answer this small qustion of what happens whan oil is in the ochen
Answer:
When oil is spilled in the sea it will normally break up and be dissipated or scattered into the marine environment over time. This dissipation is a result of a number of chemical and physical processes that change the compounds that make up oil when it is spilled. The processes are collectively known as weathering.
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How much work do you do on a 25- kg backpack when you walk a horizontal distance of 100m ?
Answer:
2,500
Explanation:
7. A rocket has a weight of 30,000 N on earth. a) What is the mass of the rocket in outer space? Use appropriate calculations and arguments to support your answer.
b) Calculate the weight of the rocket on planet X (g=7.5 N/Kg)
c) What is the weight of the rocket in outer space? Provide reasons to support your answer
Explanation:
a) mass=3000kg
b) weight on planet x=3000 × 7.5
=22,500N
c) Weight in outer space will be equal to zero
since the gravity in outer space is negligible
How do you boost the amount of electricity a fuel cell system produces?.
The amount of electricity a fuel cell system produces is boost by combined to form a fuel cell that is battery.
What is battery?A battery is a device that uses an electrochemical oxidation-reduction (redox) cycle to turn the chemical energy included in its active components directly into electric energy. An electric circuit is used in this kind of reaction to transmit electrons from one substance to another.
The actual elector-chemical unit used to produce or store electric
For this one it should be A single fuel cell generates approximately one volt of electricity. Individual fuel cells are combined to form a fuel cell stack to enhance the amount of electricity produced.
The amount of electricity a fuel cell system produces is boost by combined to form a fuel cell that is battery.
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I. Briefly answer the following questions.
1. Do renewable energy sources have little or no impact compared to
non- renewable resources? Why?
2. Discuss two human activities that endanger renewable resources.
An astronaut floating alone in outer space throws a baseball. If the ball moves away at 20 m/s, the astronaut will:.
Answer:
Move the opposite direction ( at a lesser magnitude of velocity)
Explanation:
Please Answer this question
Answer:
T = 14.7 N
Explanation:
When released the two blocks will accelerate
See diagram below (hope it is not too confusing or unclear)
Magnetism is due to the movement of ______.
Answer:
electrons
Explanation:
Brainliest
[tex]\qquad\qquad\huge\underline{{\sf Answer}}♨[/tex]
Magnetism is due to the movement of charge
Both magnetic fields are caused due to attraction and repulsion of charges, where electric fields is caused by stationary charges, while magnetic fields are caused by moving charges
What is simple harmonic oscillation? express your answer verbally, mathematically, and visually.
Simple harmonic motion is the motion in objects where the restoring for d is directly proportional to the body displacement.
What is simple harmonic motion?Simple harmonic motion a type of periodic motion where the force that restores moving object to it's right position is directly proportional to the magnitude of body's displacement and this normally acts towards the object's equilibrium position.
The formulate for simple harmonic motion are
,F = −kx, where F is the force, x is the displacement, and k is a constanst. An example of a simple harmonic oscillator is the vibration of a mass attached to a vertical spring.
Simple harmonic oscillator can be represented by the equation x ( t ) = A cos ( 2 π f t ) x(t) = A\cos(2\pi f t) x(t)=Acos(2πft)x,
where t is period.
x is displacement
A is amplitude.
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Do people actually see me inverted?☹
Answer:
of course is clear
Explanation:
very clear
A monochromatic light passes through a narrow slit and forms a diffraction pattern on a screen behind the slit. As the slit width increases, the diffraction pattern:.
As the slit width increases, the diffraction pattern gets narrower and vice versa.
Relationship between width and diffraction patternThe increase in silt width leads to the narrowing of diffraction pattern of the light because the increase of width reduces the space for the passing of light wave.
So we can conclude that as the slit width increases, the diffraction pattern gets narrower and vice versa.
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Which is a situation where two hockey pucks could have equal but opposite momentums? Assume that the ice is a frictionless surface.
A. if the hockey pucks weigh the same.
B. if the hockey pucks exert the same force on each other in the same direction while traveling at the same speed.
C. if the hockey pucks are traveling at the same speed, bounce off each other, and move in the opposite direction.
D. if the hockey pucks have the same mass.
What will happen to the period of a ball-on-a-spring if the ball is replaced by a smaller one with half the mass
When the ball on a spring is replaced by a smaller ball with half the mass : The period decrease by 29%
Calculate the Period
We will apply the formula below to calculate period
T = [tex]2\pi \sqrt{\frac{m}{k } }[/tex]
where :
T₁ / T₂ = [tex]\sqrt{\frac{m_{1} }{m_{2} } }[/tex] where m₂ = m₁ / 2
Therefore :
T₂ = [tex]\frac{T_{1} }{\sqrt{2} }[/tex] = 0.71 T
Hence we can conclude that the period will decrease by 29% ( i.e 100 - 71 ).
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describe the ways that people are trying to use technology to protect the environment and increase sustainability.
WILL NAME BRAINLIEST please help
Answer:
One way people are using technology to protect the environment is:
Using digital devices for communicating and storing information means that there is less reliance on paper, which reduces deforestation. Since trees are an important source of oxygen and also absorb carbon dioxide, this further reduces climate change.
Environmental technology has enabled us to capture this naturally occurring energy and convert it into electricity or useful heat through devices such as solar panels, wind, and water turbines.
Explanation:
Have a great of your day
#TheWizzer
You are taking measurements of sound waves. Every ¼ second, the sound waves pass your detector. What is the wave’s frequency and what is the wave’s period? (Use correct units)
Answer:
hope this helps, you can ask any questions for clarification
Superkid, finally fed up with Superbully's obnoxious behaviour, hurls a 1.35 kg stone at him at 0.501 of the speed of light. How much kinetic energy do Superkid's super arm muscles give the stone
Answer:
See below
Explanation:
A lot !
KE = 1/2 m v^2
= 1/2 * 1.35 * ( .501 * 3 * 10^8)^2 =
1.5248 x 10^16 j
kinetic energy do Superkid's super arm muscles give the stone is 62.6 × 10⁶ J.
What is kinetic energy ?Kinetic energy is the energy associated with a motion of a body. When a body is in motion having mass m then it has kinetic energy. Kinetic energy is denoted by K or T. it is expressed in joules. Kinetic energy is given by,
K = 1/2 mv²
Hence an object having zero mass or zero velocity have zero kinetic energy.
In this problem the stone is moving with velocity which is comparable with the speed of light, hence we have to find relativistic kinetic energy.
The relativistic kinetic energy is given by,
[tex]K = m_{0} c^2(\frac{1}{\sqrt{1-\frac{v^2}{c^2}} } -1)[/tex]
putting all the values in the equation
[tex]K = 1.35*3*10^8(\frac{1}{\sqrt{1-\frac{(0.5c)^2}{c^2} } }-1 )[/tex]
K = 62.6 × 10⁶ J
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An inductor produces a back emf in a dc series rl circuit when a switch connecting the battery to the circuit is closed. We can explain this by.
Hi there!
Let's say that a series RL circuit is constructed, with the switch left open.
When the switch is closed, a current will start flowing in the circuit. The INCREASING current will go through the loops of the inductor, producing an INCREASING magnetic field and consequentially a magnetic flux through the inductor. (Use hand rules).
However, the inductor does NOT want to experience this increasing magnetic flux, so an emf in the OPPOSITE direction of the current will be produced to counteract the increasing flux. (The flux would also be in the opposite direction).
This is expressed with the equation:
[tex]\epsilon = -L \frac{di}{dt}[/tex]
ε = Back emf (V)
L = Inductance (H)
i = Current (A)
t = time (s)
With the negative sign, we can see that if the current of the circuit is INCREASING, the emf produced would be in the opposite direction.
(b) Fig. 7. 2 shows a metal sphere on an insulating support.
C
Fig. 7. 2
A student has available two rods, one charged positively and one charged negatively. Using
one of these rods, she gives the sphere a uniform negative charge by induction
State which rod she chooses, and describe the procedure she follows.
The rod she chooses, to give the sphere a uniform negative charge by induction is the positively charged rod.
Charging by inductionCharging an object by induction is a process of inducing a charge on the object by bringing another charged object close to it.
Charge on the sphereWhen a positively charged rod is brought near a neutral sphere (equal negative and positive charge), the positive charge of the rod will repel the positive charge of the sphere, leaving the sphere with excess negative charge.
Thus, the rod she chooses, to give the sphere a uniform negative charge by induction is the positively charged rod.
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The worker in the picture is
a.) letting the pulley do all the work
b.) not doing work because he is using a pulley
c.) doing work because he is moving the bale of cotton
d.) transforming mechanical energy to potential energy
Answer:
the worker is doing work because he is moving the bale of cotton
There are ___ particles that make up an atom which are the smallest unit of an ___.
Answer:
subatomic, element
Explanation:
Subatomic particles are protons, neutrons, and electrons. Atoms are the smallest unit of an element.
Please help me with the blanks
Answer:
wavelength and frequency
Explanation:
wavelength is the distance between waves while frequency is the number of times in which the wave occurs.
A step-up transformer increases the voltage 20 timesIf the voltage of the primary coil is 100V_{i} what is the voltage of the secondary coll? Answer only a number without units or commas
Answer:
2000
Explanation:
well it is just 20 * 100 = 2000 v
For pea plants, T represents a dominant allele for tall pea plants and t is the recessive allele for short pea plants. If two plants with the Tt genotype are crossed, what is the probability that offspring will exhibit the dominant trait?
Answer:
75%(TT,Tt,tt) Hope that helps