Answer:
Work is closely related to energy. The work-energy principle states that an increase in the kinetic energy of a rigid body is caused by an equal amount of positive work done on the body by the resultant force acting on that body.
Explanation:
Practice 3: Label the correct phase that would result from the Moon and Earth in these positions.
Answer:
both position I think in nor
Explanation:
up is spring
left side is summer right side is winter
Down is Autumn
Describe the mirror forula for a concave mirror
Answer:
1 =1 +1
f. v u
Explanation:
f is the focal length
v is the image distance
u is the object distance
1/f = 1/v + 1/u
The above formula gives us the relation between 'f' 'v' & 'u', Where :
f = focal length
v = image distance
u = object distance
This formula not only used for concave mirror, but also for convex mirror.
A person walks 40. m east, then 20. m west. He then
continues 30. m south and finally 20.m west. What is
the total distance and displacement traveled?
Answer:
ok
Explanation:
Which force is sometimes attractive and has an infinite range?
A.strong nuclear
B.weak nuclear
C.gravitational
D.electromagnetic
Answer:
C. gravitational
Explanation:
Answer:
c
Explanation:
edge
1. A car interior is heated to 48 C by the sun What type of energy transfer?
A wave is traveling at the speed of light. If it has a frequency of 4 x 10^15 Hz, what is its wavelength?
Answer:
7.5x10-^8m
Explanation:
the formulae is v=fh ,where f is frequency
h is wavelength
hence wavelength=v/f
since the speed of light is 3x10^8
then the wavelength =3 x 10^8/4 x 10^15
=7.5x10^-8m
what is a Non-Example of Newton's 1st law?
Answer:
Say a 14 year old girl was at a construction site and she was asked to move something like a 10,000 pound brick( one brick). She would be acting on it as the unbalanced force but they would still not change their position.
so to say the girl would be doing everything she could to move that brick but the brick would still be in that same spot so the unbalanced force (the girl) would be acting on the thing that was at rest but it wouldn't move.
so the unbalanced force would not really be acting on the thing at rest; even though the unbalanced force was doing something to the brick.
( just think about it and you will eventually get it...just imagine in your head...)
Explanation:
what force is required to accelerate to 10 kg object to 5.9 m/s/s?
Force required to accelerate 10 kg object to 5.9 m/s/s ?
Mass = 10 kg
Acceleration = 5.9 m/s^2
Force = Mass * Acceleration
Force = 10 kg * 5.9 m/s^2
Force = 59 kg m /s^2 = 59 N
In the universe there are more small stars than large stars. Do you think there are more white dwarfs or black holes? Explain your answer.
Answer: black holes
Explanation:
HELP PLZZZZZZZZ
3. Which of these does not have potential energy?
a. A book resting on the floor
b. A roller coaster at its maximum height
c. A bird flying in the sky
d. A basketball shot in the air
Answer:
a. A book resting on the floor
Explanation:
Potential energy is the energy stored in a object due to its position relative to some zero position. An object possesses gravitational potential energy if it is positioned at a height above/below the zero height.
It takes 29.53 days for the Moon to rotate around Earth. What would happen if the Moon does not rotate or rotates faster than it does now?
Answer:
Explanation:
If the Moon rotated as fast as the Earth would we only see one side of the Moon? ... The Moon, on the other hand, rotates once around its own axis every 28 days, and once around the Earth in that same 28 days. The end result of this combination is that the same side of the Moon is always facing the Earth.
Answer:
If the Moon rotated as fast as the Earth would we only see one side of the Moon? ... The Moon, on the other hand, rotates once around its own axis every 28 days, and once around the Earth in that same 28 days. The end result of this combination is that the same side of the Moon is always facing the Earth.
Explanation:
how to calculate time in uniform electric field using acceleration and distance only
the formula
Answer:
[tex]t = \sqrt{\frac{s}{a} }[/tex]
Explanation:
In order to find the time in a uniform magnetic field in terms of acceleration and time we will use the general formula of acceleration, which is given as follows:
[tex]a = \frac{v}{t} \\\\where,\\\\a = acceleration\\v = velcoity = \frac{s}{t} \\\\t = time\ taken\\s = distance\ covered\ in\ the\ field\\\\therefore,\\\\a = \frac{s}{t^2}\\\\t^2 = \frac{s}{a}\\\\t = \sqrt{\frac{s}{a} }[/tex]
This formula can be used to measure time in a uniform electric field in terms of distance and time only.
Nolan tests how distance from a magnet affects the strength of the magnetic field. He tapes a
magnet and a wooden ruler to the table so the ruler's end touches the magnet. Next, he places paper
clips at different distances from the magnet and records his observations. What does he observe?
The closer the paper clips are to the magnet, the less they are attracted to it.
The closer the paper clips are to the magnet, the more they are attracted to it.
The magnet attracts the same number of paper clips at all distances.
O The magnet does not attract any paper clips at all at any distance.
The observations made by Nolan on variation of magnetic force with distance is that the closer the paper clips are to the magnet, the more they are attracted to it.
What are magnets?Magnets are the objects usually made of iron or nickel or cobalt which has the property of attracting other iron objects and property of attraction and repulsion with other magnets.
What is Magnetic force?It is the force of attraction or repulsion produced by a magnet . When a magnet is kept near other magnet, the unlike poles attract each other and like poles repel each other. when a magnet is kept near an iron object it attracts the iron object towards it with a magnetic force
The magnetic force varies with distance, it is more stronger near the magnet and less as we go away from it.
So the paper clips which are made of iron when kept near to the magnet are attracted more as compared to the paper clips which are away from the magnet.
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The resistance of a 24 W, 12 V filament lamp depends on the current flowing through the lamp. For currents up to 0.8 A, the resistance has a constant value of 2.5 Ω.
Calculate the potential difference across the lamp when a current of 0.8 A flows through the lamp.
Answer:
V=IR
V=0.8×2.5
V=2V
where V=potential difference
I=Current
R=Resistance
.........
how much force is needed to accelerate at 66 kg skier 4m/s^2 ?
WHAT IS THE DENSTY OF ALL THE LAYER IN THE ATMOSPHERE
Answer:
The troposphere starts at the Earth's surface and extends 8 to 14.5 kilometers high (5 to 9 miles). This part of the atmosphere is the most dense. Almost all weather is in this region.
Explanation:
The troposphere contains roughly 80% of the mass of Earth's atmosphere. The troposphere is denser than all its overlying atmospheric layers because a larger atmospheric weight sits on top of the troposphere and causes it to be most severely compressed.
The troposphere starts at the Earth's surface and extends 8 to 14.5 kilometers high (5 to 9 miles). This part of the atmosphere is the most dense. Almost all weather is in this region.
what force on a 936kg elevator that is falling freely at 9.8 m/s^2
Answer:
9172.8 N
Explanation:
F = ma
F = (936 kg)(9.8 m/s^2)
F = 9172.8 N
Electric kettle with the resistance of 20-02.is used-to-heat:4 kg of water. If
the initial temperature of the water is 20°C, how much time-later will the water boil?
C-water=-4200 J/kg°C. The kettle uses:220 V voltage.
Picture=Example
Some help please :)
At which stage in the life cycle of a star is helium combined to form elements lithium through iron? Explain.
Answer:
Explanation:
During the formation of the universe some 14 billion years ago in the so-called ‘Big Bang’, only the lightest elements were formed – hydrogen and helium along with trace amounts of lithium and beryllium. As the cloud of cosmic dust and gases from the Big Bang cooled, stars formed, and these then grouped together to form galaxies.
PLEASE HELP ME SOLVE ASAP
Answer:
a) The distance after 1 minute will be x = 600 m.
b) The distance of vertical drop from A to B is [tex]\Delta y=17658\: m[/tex].
Explanation:
Let's use the parabolic motion equations. Here we have a horizontal initial velocity, and knowing that the horizontal velocity is a constant we have:
a)
[tex]v_{x}=\frac{\Delta x}{\Delta t}[/tex] (1)
Where:
v(x) is the horizontal velocity (v(x) = 36 km/h = 10 m/s)Δx is the displacement Δt is the time (Δt = 1 min = 60 s)Usinf (1) we find Δx:
[tex]\Delta x=v_{x}\Delta t[/tex]
[tex]\Delta x=10*60=600 m[/tex]
Therefore, the distance after 1 minute will be x = 600 m
b)
Here we need to find Δy = y(A)-y(B), this is the distance of vertical drop from A to B.
Using the following equation we will get it:
[tex]y_{B}=y_{A}+v_{iy}t-\frac{1}{2}gt^{2}[/tex]
Let's recall that the initial velocity in the y-direction is 0.
[tex]y_{A}-y_{B}=0t+\frac{1}{2}gt^{2}[/tex]
[tex]\Delta y=\frac{1}{2}gt^{2}[/tex]
[tex]\Delta y=\frac{1}{2}(9.81)(60)^{2}[/tex]
[tex]\Delta y=17658\: m[/tex]
Therefore, the distance of vertical drop from A to B is [tex]\Delta y=17658\: m[/tex].
I hope it helps you!
HELPWhat is the intensity of an electric field at a point where a 0.50 C
charge experiences a force of 20. N?
Remember to identity all of your data, write the equation, and show
your work. (5 points)
Answer:intensity of an electric field (E)
charge (q)
Force (F)
E=F/q
E=20N/.5C
E=40N/C
Explanation:
The Electric field intensity will be 40 N/C
What is an Electric field intensity ?The electric field intensity at a point is the force experienced by a unit positive charge placed at that point.
Electric field intensity(E) = force (F)/ charge(q)
given
charge = 0.50 C
Force = 20 N
Electric field intensity = ?
E = 20 N / 0.50 C
E = 40 N/C
The Electric field intensity will be 40 N/C
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Which sport requires the least amount of agility? HELLLLPPP
1.volley ball
2.golf
3.football
4.basketball
Answer:
golf
Explanation:
it's less physical strength in more of you hitting the ball with whatever the stick is called
When current passes through a wire, a magnetic field is created around the wire only if the:
□ if the wire is absolutely straight
□ if the wire is curved in a loop
□if the current makes a complete loop
□if the current comes from a battery always around the wire
Answer:
when current passes through a wire amagnetic field is created.
Whenever the current passes through a wire then the magnetic fields in the form of a circular loop form around the wire.
What is a magnetic field?The magnetic field is generally a force that is generated due to the flow of electrons in the wire.
The magnetic field generated is always in the circular loop around the wire.
The magnetic field only remains around the wire as far there is the flow of the current in the wire.
if the flow of the current terminated then the force of the magnetic field also vanished.
Thus Whenever the current passes through a wire then the magnetic fields in the form of a circular loop form around the wire.
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Can someone tell me everything they know about mechanical waves and ASAP, please!?!?!?
Answer:
A mechanical wave is a wave that is an oscillation of matter, and therefore transfers energy through a medium. While waves can move over long distances, the movement of the medium of transmission—the material—is limited. Therefore, the oscillating material does not move far fro
Explanation:
how are polar and nonpolar molecules similar and different?
Answer:
Polar molecules occur when there is an electronegativity difference between the bonded atoms. Nonpolar molecules occur when electrons are shared equal between atoms of a diatomic molecule or when polar bonds in a larger molecule cancel each other out.
Explanation:
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Radio waves travel at the speed of light. How long would it take the Russians
to send a message to a spacecraft orbiting Mars at a distance of 7.8 x 10^10 m
from Earth?
Answer: you can call you when you can get me a call and I have to go back your mom I don’t have a lot to say about that because you don’t want me a little more because you have a lot to me because I have to do it I have a lot to say about it I have a good day and you don’t have a good day and you have a lot of fun with your family I don’t want you have a good night I love your day you ty me you don’t want me a good night to me a little about me you don’t have a good day I love your day I don’t
Explanation: the app crashes every time I have a good night and a good night out and it is good yuyu Hi hi mom I have to go back and pick you a little little more you have to go back
Which of the following is a purpose of rules in sports and games? (5 points)
Answer:
To keep everyone safe
Explanation:
Without rules people could get hurt
Which of the following would I use to measure the distance across a GALAXY?
A) Astronomical Unit (AU)
C) Kilometer (Km)
B) Light Year (LY)
D) Miles (mi)
Answer:
B - Light Year (LY)
Kennedy and Lilly are in science class. They are asked to prove that some forces are non-contact
forces. The girls list five examples of objects exerting a force on each other without touching. Do you
agree with their list? Tell why or why not?
1. Two like magnetic poles repel each other.
2. Putting on a wool sweater can make your hair get static electricity when it rubs against the
sweater.
3. When you bring two negatively charged balloons near each other they push each other away.
4. Magnets stick to a refrigerator.
Number 1 and 3 demonstrate non-contact forces because the magnets or electrically charged objects exert
forces on each other without touching.
3 is the only example of non-contact forces since like charges repel each other.
Number 1 and 4 are non-contact forces since they both use magnets.
All four are good examples of non-contact forces since they all use either magnets or electric charge which are
non-contact forces.
Answer:1,3 and 5
Explanation:
A boy is looking into a plane mirror .His nose is 30 cm in front of the mirror .How far is his nose from where its image appears to be ?
Answer:
60cm
Explanation:
30+30=60