Explanation:
The speed of light in air is approximately 300,000,000 meters per second. The speed of sound in air is approximately 343 meters per second. Light is the propagation of electromagnetic waves, while sound is the physical vibration of the medium
A rod of length 2d0 and mass 2m0 is at rest on a flat, horizontal surface. One end of the rod is connected to a pivot that the rod will rotate around if acted upon by a net torque. A sphere of mass m0 is launched horizontally toward the free end of the rod with velocity v0, as shown in the figure. After the sphere collides with the rod, the sphere sticks to the rod and both objects rotate around the pivot with a common angular velocity. Which of the following predictions is correct about angular momentum and rotational kinetic energy of the sphere-rod system immediately before the collision and immediately after the collision?.
The angular momentum immediately before and after the collision is equal. The rotational kinetic energy before the collision is greater than the rotational kinetic energy after the collision.
What are rotational kinetic energy and angular momentum?When a body is rotating in a plane about a center, the energy possessed by the body is known as rotational kinetic energy.
Angular momentum is the momentum of a body having circular motion.
According to the law of conservation of angular momentum, the momentum remains conserved before and after the collision.
In the given sphere rod system, after the sphere (m0) sticks to the rod(2m0), the mass increases to 3m0 due to which the moment of inertia is increased but the speed is decreased.
Rotational Kinetic Energy =[tex]\frac{1}{2}[/tex]Iω²
Thus, the angular momentum immediately before and after the collision is equal. The rotational kinetic energy before the collision is greater than the rotational kinetic energy after the collision.
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if 36 columb of charge pass through a wire in 45 what current is it carrying ?
How can you make the work output of machine greater than the work input
Answer:
The only way to increase the work output is to increase the work input. You can't get more work out of a machine than you put into it. The moving parts of a machine must use some of the work input to overcome friction. Because of friction, the work output of a machine is always less than the work input.
Explanation:
How long did the family stay at the beach?
(A) 4 hours
(B) 10 hours
(C) 90 hours
Answer:
4 hours
Explanation:
From hour 2 to 6 the family was not changing distance...they were stationary at the beach for 4 hours
How does an electric generator work? the axle rotates the armature in the magnetic field of a permanent magnet, which induces an electric current. the armature rotates the axle in the magnetic field of a permanent magnet, which induces an electric current. the axle rotates the armature in the magnetic field of an electromagnet, which induces an electric current. the armature rotates the axle in the magnetic field of an electromagnet, which induces an electric current.
The armature rotates the axle in the magnetic field of an electromagnet, which induces an electric current defined that es the working of an electric generator.
What is an electric generator?An electric generator is physically equivalent to an electric motor, but it converts mechanical energy into electrical energy using a reversed flow of power.
When strong magnets are used, a strong flux is produced, and the motor becomes more powerful. Internal flux has a significant impact on coil strength.
Increasing current results in greater power. In the same way, shortening the distance between magnets makes the motor stronger by increasing flux and torque.
The armature rotates the axle in the magnetic field of an electromagnet, which induces an electric current defined that es the working of an electric generator.
Hence option D is correct.
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Answer:
d
Explanation:
edge 2022
Hello,
Please can I have some help with these questions? Many thanks!
You have already plotted the graph.
Solving unsolved one
#d
One result is anamolous
That's
(50,32)This is because
until 50 it's increasing 6 per step But at 50 it increased +7 i.e from 25 to 32As it broke the sequence hence this is anamolousHow does the seasonal change of hibernation help some animals in Florida?
Answer:
Hibernation allows the animal to survive when food is scarce.
Explanation:
in spring they need food to survive
As an object moves around, on which quantities does the change in its gravitational potential energy depend?.
Answer: Heyo Kenji Here! Here's your answer- As expressed by the equation, potential energy depends upon the mass and the height of the object. Any increase in these two quantities will lead to an increase in the amount of potential energy possessed by the object.
Explanation: Hope this helps!
Have a nice day!
- Kenji ^^
If you pull on a box with a force of 5 N and your teacher pulls on the same box with a force of 5 N in the opposite direction, the net force on the box is _______. View Available Hint(s)for Part A 0 N 5 N 50 N 10 N
Answer:
A. 0N
Explanation:
assume you're pulling in the positive direction, then we have 5 + (-5) = netforce = 0N
A combination burglary/fire alarm system listed for household use may be used in a small mercantile occupancy.
A. True
B. False
The same combination burglary/fire alarm system listed for household use can not be used in a small mercantile occupancy hence the statement is false.
What is a small mercantile occupancy?A small mercantile occupancy refers to an area that is used for the display of certain goods. It is in short a mini commercial space.
We can not use the same combination burglary/fire alarm system listed for household in a small mercantile occupancy hence the statement is false.
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If there was a flood that caused damage to your car, what kind of coverage must you have in order for the insurance company to help cover the cost of repairs?
In order for the insurance company to help cover the cost of repairs, you must have comprehensive auto coverage.
What is flood?An overflow of water causing the destruction beyond its limits is called flood.
In the situation of car damage due to flood, comprehensive auto coverage from the insurance company will pay for the damage to your flooded vehicle. So, it helps in covering the cost of damages to vehicle when damage is not caused by a collision.
Thus, In order for the insurance company to help cover the cost of repairs, you must have comprehensive auto coverage.
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What do we mean when we say that particles such as neutrinos or wimps are weakly interacting?.
Answer:
They respond to the weak force but not to the electromagnetic force, which means they cannot emit light.
Explanation:
A planet is most likely to have tectonic activity if it has:.
Answer: Heyo Kenji Here! Here's your answer- A planet is most likely to have tectonic activity.
Explanation: Hope this helps!
Have a nice day!
- Kenji ^^
which imaginary plane describes orbital plane in the solar system?
Answer:
The orbital plane would be the plane that contains the line that joins the sun and the earth (at all times).
If a hydroxide dissolves in water what is it called
Answer:
Strong Electrolyte
Explanation:
A car is traveling with a velocity of 40. 0 m/s and has a mass of 1120 kg. How much kinetic energy does the car have?
Answer:
896 kj
Explanation:
KE= 1/2 mv^2 = 1/2 1120 40^2 =
On average, how often does a total solar eclipse occur?.
Answer:
every 18 months
Explanation:
whether you can view the eclipse depends on where u live that is why it happens less than every 18 months in your place of residence
If the speed of an object slows down but the distance stays the same, what can
you conclude about the time it takes?
Answer:
which of tne following is non- contact force
If we could see our own galaxy from 2 million light-years away, it would appear _________.
Answer:
It would appear as a flattened disk with a central bulge and spiral arms, spanning a few degrees across the sky.
Explanation:
I hope this helps! Have a great day!
Anygays-
After the right string is cut, the meterstick swings down to where it is vertical for an instant before it swings back up in the other direction. What is the angular speed when the meterstick is vertical?.
The Angular Speed of the Meterstick after it becomes vertical is given as:
= 5.800 rad/s. This is computed using the formula for conservation of energy.
What is Angular Speed?
Angular Speed is defined as the measure of how quick or fast the central angle of a body that is rotational is changing in relation to time. Please see the attached for the full question.
What is the solution for the Angular Speed of the phenomena described?Recall that the formula for conservation of energy is given as:
(1/2)(Iω²) = mg(L/4) where
L= Lenght and
m = Mass. Please refer to the attached questions.
Factoring the moment of inertia about the pivot, we solve for the angular speed using the following formula:
ω = [tex]\sqrt{(mgL)/2I}[/tex]
= [tex]\sqrt{(6g)/7L}[/tex]
Hence, the angular speed is:
ω = 8.800rad/s
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How does the mass of an object affect the gravitational forces experienced by another object?.
Explanation:
F=(Gmm)/(r^2)
larger the mass stronger the force. An object with a large mass will produce a large force. A small mass will produce a small force.
4. How does nearness to water affect the climate zone of an area?
a) increases humidity due to a higher rate of evaporation
b) decreases humidity
c) it doesn't affect the climate
d) it makes the temperatures change drastically
Answer:
Choice A.
Nearness to a body of water causes an increase in humidity, due to the higher rate of evaporation.
The amount of boiling water required to raise the temperature of 25. 0 kg of water in the bath to body temperature is 4. 80 kg. In this process, the heat lost by the boiling water is equal to the heat gained by the room-temperature water. How much heat was transferred in this process?.
Answer:
I already gave you the answer in a picture
Explain what it means when someone says energy can not be created or destroyed.
Answer:
Newtons law of conservation energy says that energy cannot be created or destroyed because energy is always made into something else. It is always reused.
Explanation:
According to NEC 110.9, switches and fuses must have a(n) ____ capacity not less than the available short-circuit current at their supply terminals.
According to NEC 110.9, switches and fuses must have Interrupting capacity not less than the available short-circuit current at their supply terminals.
What is interrupting Capacity?Interrupting Capacity is the fault conditions current that a circuit breaker may stop without causing the circuit breaker to fail.
According to NEC 110.9, switches and fuses must have Interrupting capacity not less than the available short-circuit current at their supply terminals.
Hence the correct answer for the blanks is Interrupting .
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1 What do the characteristics of electromagnetic radiation include?
A. characteristics of particles only
B. characteristics of waves only
C. characteristics of both waves and particles
D. characteristics of neither waves nor particles
2 Which equation correctly relates the energy of electromagnetic radiation to its frequency?
A. E=h/v
B. E=hv
C. E=v
D. E=h
3 What causes electrons in atoms to emit energy after absorbing it?
A. being ripped off their atoms
B. returning to their ground energy states
C. losing mass
D. becoming electromagnetic radiation
4 What observation led scientists to postulate the existence of photons?(1 point)
A. electrons in atoms emitting energy only in certain amounts
B. seeing photons through powerful microscopes
C. discovering that electrons can have varying amounts of energy
D. electrons in atoms emitting energy across the electromagnetic spectrum
Answer:
1. characteristics of both waves and particles
2. E = hv
3. Returning to their ground energy states
4. Electrons in atoms emitting energy only in certain amounts
Explanation:
took the connexus physics emission spectra quick check
The characteristics of electromagnetic radiation include the characteristics of both waves and particles. So, option D.
The expression that relates the energy of electromagnetic radiation to its frequency is given by E = hνSo, option B.
The electrons in atoms emit energy after absorbing by returning to their ground energy states. So, option B.
The observation that led scientists to postulate the existence of photons is that electrons in atoms emitting energy only in certain amounts. So, option A.
When an atom absorbs energy, electromagnetic radiation is produced. One or more electrons move to a different location within the atom as a result of the energy that was absorbed.
An electromagnetic wave is created as the electron moves back to its initial position.
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A sample of a gas in a rigid container at 30. 0°c and 2. 00 atm has its temperature increased to 40. 0°c. What will be the new pressure?.
Answer:
2.066 atm
Explanation:
PV = nRT increase T volume and n and R remain constant
30 C = 303.15 K 40 C = 313.15
P prop to T new P will be 313.15/303.15 * 2 atm = 2.066 atm
A softball traveling at 34 m/s has a kinetic energy of 98 J.
Calculate its mass.
calculate the height of the ball.
Calculate the power if ball stays in air for 1 mins
will give brainliestttt
Answer:
The mass=0.169
The height=57.8
The power=1.63 watts
Explanation:
The formula for mass is 2KE/v^2
v=34×34 KE=98 therefore 2*98/34^2=0.169
The formula for height is v^2/2g
v=34*34 therefore 34^2/2*10=57.8
The formula for power is work/time
in which the work is the kinetic energy =98
and time 1*60secs =60 therefore 98/60=1.63watts
Which of the following items is not a part of
the Residential Electrical Service?
A. Feeders
B. Meter
C. The Main Panelboard
D. Utility substations
Answer:
C is your answer.
Explanation:
The strength of the electric field 0.5 m from a 6 µc charge is n/c. (use k = 8.99 × 109 n•meters squared per coulomb squared and round answer to the nearest whole number.)
The strength of the electric field will be 215760 NC⁻¹. The concept of the electric field strength is used in the problem.
What is electric file strength?The electric field strength is defined as the ratio of electric force and charge. Its unit is NC⁻¹.
The given data in the problem is;
E is the Electric Field Strength
k is the Colomb's constant = 8.99 x 10⁹ N.m²/C²
q is the magnitude of charge = 6 μC = 6 x 10⁻⁶ C
r is the distance = 0.5 m
The electric field strength is given by the formula;
[tex]\rm E = \frac{Kq}{R^2} \\\\ \rm E = \frac{8 .99 \times 10^9 6 \times 10^6 }{(0.5)^2} \\\\ E=215760 \ NC^{-1}[/tex]
Hence the strength of the electric field will be 215760 NC⁻¹.
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