witch substance does light travel fastest
1.empty space
2.air
3.water
4.dimond
air and empty space.
When a person holds an object, it has potential energy. How will the potential energy change if the person lifts the object above his or her head?.
Answer:
The object's potential energy will be the same.
Explanation:
As long as the object hasn't been moved by itself, the potential energy will not change
A p-wave arrives at 3:00:00 and the s-wave arrives at 3:07:20, what is the exact distance that the seismic station is away from the epicenter?
The exact distance from the seismic station to the epicenter is 6000 km.
Epicenter of earthquakeThe earthquake's epicenter is the point above the fault location on the earth's surface.
Given that:
A p-wave arrives at 3:00:00 and the s-wave arrives at 3:07:20.
Difference in arrival time = 3:07:20 - 3:00:00 = 7 minutes 20 seconds
From the earthquake time travel graph, a time difference of 7 min 20 sec is at x = 6
The exact distance from the seismic station to the epicenter is 6000 km.
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The total numver of electrons accomodated in the forth shell is.
Answer:
18 valence electrons in the 4th shell
Explanation:
1 - 2 electrons
2 - 8 electrons
3 - 8 electrons
4 - 18 electrons
If you move 70 meters in 20 seconds what is your speed
Answer:
3.5 m/s
Explanation:
Speed = Distance / Time
= 70 m / 20 s
= 7 / 2 m/s
= 3.5 m/s
Describing Simple Machines
Match each simple machine with its description.
lever
is a ramp
inclined plane
+
similar to a seesaw, can lift an object
pulley
uses a rope; can change the direction
of a force
wheel and axle
reduces the amount of friction when
an object is being moved
wedge
t
can split apart an object
Answer:
A wedge can split an object apart
A lever is the seesaw
inclined plane is a ramp
a pulley can reduce the amount of friction
wheel and axle is the rope one
Explanation:
Following are the matches:
lever: similar to a seesaw, can lift an objectinclined plane: is a ramppulley: uses a rope; can change the direction of a forcewheel and axle: reduces the amount of friction when an object is being movedwedge: can split apart an objectWhat are simple machines?Simple machines are basic mechanical devices that can help make work easier by reducing the amount of force or effort needed to do a task. They are usually the most basic forms of machines, often made up of only one or two parts, and are used to change the direction or magnitude of a force.
There are six types of simple machines:
Lever: A rigid bar that pivots around a fixed point, called a fulcrum, to move a load. Examples include a seesaw, crowbar, and scissors.Inclined Plane: A sloping surface used to move a load from a lower level to a higher level. Examples include a ramp and stairs.Pulley: A wheel with a grooved rim used to change the direction or magnitude of a force by pulling a rope or cable. Examples include a crane and a flagpole.Wheel and Axle: A wheel with a rod or axle at its center used to move a load. Examples include a car wheel and a doorknob.Wedge: A triangular-shaped tool that can split or separate objects. Examples include a knife and an ax.Screw: An inclined plane wrapped around a cylinder or cone used to hold objects together or to lift or move them. Examples include a bolt and a jar lid.Simple machines are the building blocks for more complex machines, and they are used in many everyday devices and equipment to make work easier and more efficient.
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A common urban legend propped up in the 1930’s with the opening of the Empire State Building. The legend says that if you throw a penny off the top of the building, it will fall all the way to the ground gaining speed all the way.
1) Calculate the time of flight of the penny (neglect air resistance). Show all work.
2) Calculate the final speed of the penny. Show all work.
3) Convert the final speed of the penny to miles per hour.
When a body is thrown downwards, it falls freely under gravity.
Acceleration under gravityThe question is incomplete as the values are missing but I will try to help you the much I can. We must note that the acceleration of a body refers to the rate at which its velocity changes per unit time.
When an object is thrown down from a height. It gains speed due to acceleration due to gravity which acts on the body as it falls freely.
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What is the difference between dense wavelength division multiplexing and coarse wavelength division multiplexing
Calculate Clara's acceleration for part A of her run
An7=21=3
Explanation:
becaue 7 time 3 =21
A rolling ball has 18 joules of kinetic energy and is rolling 3 m/s. Find its
mass
Answer:
The mass of a rolling ball with kinetic energy of 18 joules and velocity of 3m/s is 4kg.
Explanation:
HOW TO CALCULATE MASS?
The mass of a moving object can be calculated by using the following expression:
K.E = ½ mv²
Where;
K.E = kinetic energy (Joules)
m = mass (kg)
v = velocity (m/s)
According to this question, rolling ball has 18 joules of kinetic energy and is rolling at 3m/s. The mass is calculated as follows:
18 = ½ × m × 3²
18 = ½ × 9m
36 = 9m
m = 4kg
Therefore, the mass of a rolling ball with kinetic energy of 18 joules and velocity of 3m/s is 4kg.
Earth's crust is formed during ______ and destroyed by ______.
options: (for both blanks)
sea floor spreading
earth quakes
shearing
subduction
Answer:
The first one is seafloor spreading and the second is subduction
Explanation:
Answer: sea floor spreading and subduction
Explanation: hopes this helps :)
The Galileo spacecraft measured that the moon Ganymede had a magnetic field, indicating that its interior was at least partly melted and warm. What do scientists think is the most likely reason for this
Scientists think the most likely reason is that it was heated by tidal forces from Jupiter.
What is Tidal force?This is known as the gravitational effect that stretches an object along the line towards the center of mass of another object as a result of gradient in gravitational field from the other body.
The moon Ganymede having a magnetic field, indicating that its interior was at least partly melted and warm was however as a result of tidal forces from Jupiter which caused the heating.
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Why do the planets in our solar system stay in their positions?.
The electron volt (eV) is a unit of:
energy
force
potential difference
power
charge
Answer:
the electron volt (eV) is a unit of energy.
When burning fuel for cooking, the pan and the food absorb energy and heat up. In this process, which form of energy is chemical energy converted into?
atomic energy
radiant energy
mechanical energy
thermal energy
Answer:
thermal energy
Explanation:
Answer:
D. Thermal Energy
Explanation:
Hope it helps! Have a great day!
Sandra~
Consider the following debate between two students about the cause of the phases of the Moon and answer the question: Student 1: The phase of the Moon depends on how the Moon, Sun, and Earth are aligned with one another. During some alignments only a small portion of the entire Moon's surface will receive light from the Sun, in which case we would see a crescent moon. Student 2: I disagree. The Moon would always get the same amount of sunlight; it's just that in some alignments Earth casts a larger shadow on the Moon. That's why the Moon isn't always a full moon.
Do you agree or disagree with either or both of the students?
The moon rotates round Earth, we see it as crescent moon.Hence, I agree with the initial student.
Sun, Moon, Earth and RotationsGenerally, due to the fact he rightly stated that the positions of the Earth, Sun and moon continues on altering consistently due to the motion of moon round Earth.
Now, when the moon comes in between the Sun and the Earth about 1/2 component of the moon receives sunlight.
Similarly, as the moon rotates round Earth, a Earth will see the Sun-rays on the Moon coming from distinct angles and when solely a small element of the moon is illuminated via sunlight, we see it as crescent moon.
Therefore,I agree with the initial student
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A2 kg cart moving initially at 4 m/s strikes a 3 kg cart, initially
at rest. The two collide inelastically, sticking together. What is
their velocity immediately after the collision?
Answer:
1.6 m/s
Explanation:
m1v1 = (m1 + m2)v2
=> 2 x 4 = 5 x v2
=> v2 = 8/5
=> v2 = 1.6 m/s
A container of orange juice holds 580 millimeters. How many liters is 580 millimeters?
Since 1 liter = ___ millimeters, divide 580 by ___. 580 ÷ ___ = ___. So, 580 millimeters = ___ liter. The container holds ___ liter of orange juice.
Answer:
1000
1000
1000
0.580
0.580
0.580
Explanation:
help me please (*￣(ｴ)￣*)
Answer:
1) Are always conservative
Explanation:
Elastic forces are always conservative.
Hope it helps you.
please mark as the brainliest answer.
helppppppppppppppppppppp
The bulb is at full brightness when the potential difference across the bulb is 12v
The current through the bulb is then 3A
Calculate the power of the bulb when it is at the full brightness and give the unit?
SOMEONE PLEASE HELP MEE <33
Answer:
36W
Explanation:
Using P=VI
Where:
P = Power of the light bulb (in Watts W)
V = Voltage of the light bulb (in Volts V)
I = Current passing through the light bulb (in Ampere A)
P = 12V * 3A = 36W
Juan and Julia know they have a gravitational attraction to each other. If Juan's
mass is 70 kg and Julia's mass is 50. kg, Their force of attraction is 5.8 x 10^-11
N. Calculate how far apart they are?
F = G.m₁m₂/r²
r² = G.m₁m₂/F
r² = (6.67 x 10⁻¹¹ x 70 x 50) / (5.8 x 10⁻¹¹)
r² = 4025
r = 63.44 m
A spring has a spring constant of 100 N/m , and the mass hanging on it is 0.50 kg. What is the period of the spring's motion?
Answer:
0.44 sec
Explanation:
k = 100 N/m, m = 0.50 kg
Period
brainly help this kid. thank you in advance
Answer:
C)
Explanation
maybe a but its most likely c
its def. not 4 and def. not 2
Explanation:
option c ig ....I'm not sure tho
What is the value of a charge that has an electric potential of 325 V and an electric potential energy of 0. 025 J?.
The value of the charge will be 7.69 ×10⁻⁵ C. When the matter is subjected to an electromagnetic field, it acquires an electric charge, which causes it to experience a force.
What is electric potential?Electric potential is the amount of work needed to move a unit charge from a point to a specific point against an electric field.
The given data in the problem is;
[tex]\rm E_p[/tex] is the electric potential energy = 0. 025 J
V is the electric potential = 325 V
Q is the charge =?
Electric potential energy is the product of the charge and the voltage. So the value of the charge is given as;
[tex]\rm E_p= Q \times V \\\\ \rm Q= \frac{ E_p}{V} \\\\ Q= \frac{ 0.025}{325} \\\\ \rm Q = 7.69 \times 10^{-5} \ C[/tex]
Hence the value of the charge will be 7.69 ×10⁻⁵ C.
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Each square of the periodic table shows information about one element. The square usually shows the element's _______.
A.
symbol
B.
atomic mass
C.
atomic number
D.
all of these
Jesse is swinging Miguel in a circle at a tangential speed of 3. 50 m/s. If the radius of the circle is 0. 600 m and Miguel has a mass of 11. 0 kg, what is the centripetal force on Miguel? Round to the nearest whole number. N.
The force needed to move a body in a curved way is understood as centripetal force. The centripetal force on Miguel will be 224 N.
What is centripetal force?The force needed to move a body in a curved way is understood as centripetal force. This is a force that can be sensed from both the fixed frame and the spinning body's frame of concern.
The direction of centripetal force is always in the path of the center of the course.
The given data in the problem is
v is the tangential speed = 3.50 m/sec.
r is the radius of circle= 0. 600 m
m is mass of Miguel = 11. 0 kg
[tex]F_c[/tex] is the centripetal force on Miguel=?
[tex]\rm F_C=\frac{mv^2}{r} \\\\\ F_C=\frac{11 \times (3.5)^2^}{0.6} \\\\ \rm F_C= 224.58 N[/tex]
Hence the centripetal force on Miguel will be 224 N.
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The ability of one substance to
dissolve in another substance is the___ of the solute
Answer:
solubility
Explanation:
Give two environmental advantages to turning off electrical appliances when not in use.
Ty!
Answer:
Turning off your lights will also help reduce the use of non-renewable resources that are harmful to the environment. You can turn off the lights during the day especially if you don't need them. You can also turn off your appliances to help reduce your carbon footprint and help save the planet.
explain the ways of producing charges
Answer:
By friction,by contact,by Electrostatic induction
Explanation:
By friction:This is the process whereby electric charges are produced when two surfaces move over another
By Contact :This is when energy is produced when two bodies come in contact with each other
By electrostatic induction: When a charged object is brought closer to another object (not touched), the original object doesn't lose any charge and the other object gets charged.
hope this helps
If two objects, like the eggs in the video, experience the same change in momentum but over time periods of
different lengths, how do the forces experienced by each object compare?
Explanation:
what is the force
ican't under stand these question
These two objects are experienced different forces and the object which experiences the same change in momentum but over a shorter period of time will experience more force than the other object.
To know more about the dependance of force on momentum and time, we need to know more about force and how it works.
What is force?Newton's second law says that the force is rate of change of momentum with resprct to time. What is the mathematical formulation of force?Mathematically, if ΔP = change in momentum and Δt = change in time, Force=ΔP/ΔtIf ΔP is constant, then force is inversly propertional to the change in time i.e. when change in time increases force decreases and vice versa.Thus, we can conclude that between these two objects, one, who experiences the same change in momentum for shorter period of time, will experience more force than other.
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