Answer:
T kinda waky tho -_-----_-----_-////_----_---///
Explanation:
Answer:
true
Explanation:
Complete the passage.
Sound waves and some earthquake waves are
waves. Ocean, light, and other earthquake waves are
waves.
Answer:
Answer: Sound waves and some earthquake waves are longitudinal waves. Ocean, light and other earthquake waves are transverse waves.
Explanation:
There are 2 types of waves:
1. Longitudinal waves: These waves are defined as the waves in which the particles of the medium move in the direction of the wave. This requires a medium to travel. For Example: Sound Waves.
2. Transverse wave: These waves are defined as the waves in which the particles of the medium travel perpendicularly to the direction of the wave. This does not require a medium to travel. These can travel in vacuum also. For Example: Light waves.
Hence, Sound waves and some earthquake waves are longitudinal waves. Ocean, light and other earthquake waves are transverse waves
Answer:
Longitudinal, transverse.
Explanation:
The definitions:
Longitudinal wave: A type of wave that transfers energy parallel to the direction of wave motion.
Transverse wave: A type of wave that transfers energy perpendicular to the direction of wave motion.
Also:
How do you find the average speed of three speeds?
Answer:
Assess what information you are given. Use this method if you know:
the total distance covered by one person or vehicle; and
the total time it took that person or vehicle to cover the distance.
Explanation:
Hope this helps! I might be wrong, so tell me if I am
Answer:
Average speed can be calculated by dividing the total distance the object travels by the total amount of time it takes to travel that distance.
Explanation:
This is as much as I can help you, i don't know much else on how to do that ;w; sorry
An objects motion changes study island
Answer:
D
Explanation:
Answer:
D
Explanation:
:p
who is isak Njuton??
Answer:
Sir Isaac Newton was an English mathematician, physicist, astronomer, theologian, and author
Explanation:
but he is most importantly known for having formulated the theory of universal gravity
and for having invented the calculus in the mid to late 1660s
In the diagram, sonar is used to locate a sunken ship. If the sonar echo is heard after 3 seconds, how long did it take for the signal to reach the sunken ship? Why?
Answer:
1.5s
Explanation:
Given parameters:
Time taken for the echo to be heard = 3s
Unknown:
Time taken for signal to reach the ship = ?
Solution:
An echo is phenomenon that originates from wave reflection.
If the travel time of the echo is 3s, the time it takes the echo to reach the ship is half of this time.
So,
Time taken to reach the sunken ship = [tex]\frac{3}{2}[/tex] = 1.5s
Volleyball was invented in 1905.
Answer:
REALLY??
Explanation:
Volleyball was invented in 1905.
A bus approaches red traffic light, and slows down from a speed of 15
m/s to rest in 3 seconds. What is the average acceleration (in m/s)?
Answer:
-5
Explanation:
-15/3
If two charged objects in a laboratory are brought to a distance of 0.22 meters away from each other. What is
the force between the spheres is 4,550 N and the charge on one object is 9.9×10–5 C
Answer:
[tex]q_2=2.47\times 10^{-4}\ C[/tex]
Explanation:
The charge on one object, [tex]q_1=9.9\times 10^{-5}\ C[/tex]
The distance between the charges, r = 0.22 m
The force between the charges, F = 4,550 N
Let q₂ is the charge on the other sphere. The electrostatic force between two charges is given by the formula as follows :
[tex]F=\dfrac{kq_1q_2}{r^2}\\\\q_2=\dfrac{Fr^2}{kq_1}\\\\q_2=\dfrac{4550\times (0.22) ^2}{9\times 10^9\times 9.9\times 10^{-5}}\\\\q_2=2.47\times 10^{-4}\ C[/tex]
So, the charge on the other sphere is [tex]2.47\times 10^{-4}\ C[/tex].
Because of a frictional force of 2.6 N, a force of 2.8 N must be applied to a
textbook in order to slide it along the surface of a wooden table. The book
accelerates at a rate of 0.11 m/s?.
a. What is the unbalanced force on the book?
b. What is the mass of the book?
(a) The unbalanced force will be "0.2 N".
(b) The mass of book "1.818 kg".
Unbalanced force and mass:Given:
Applied force = 2.8 NFrictional force = 2.6 NAcceleration = 0.11 m/s²(a) Total unbalanced force,
→ [tex]F_{net} = 2.8-2.6[/tex]
[tex]= 0.2 \ N[/tex]
(b) By applying Newton's second law,
→ [tex]F = ma[/tex]
or,
→ [tex]m = \frac{F_{net}}{a}[/tex]
By substituting the values,
[tex]= \frac{0.2}{0.11}[/tex]
[tex]= 1.818 \ kg[/tex]
Thus the above approach is correct.
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Who could explain the phenomenom of interference of light?
Answer:
When the waves reflected from the inner and outer surface combine they will interfere with each other, removing or reinforcing some parts of white light by destructive or constructive interference. ... This results in color.
Explanation:
this is what we studied
so basically there is like a surface
and 2 different waves coming out of the same source
they will combine and start removing parts of the white light (which originally consists of 6 to 7 colors)
results in showing these colors
when measuring the potential difference across a component, you need
Answer:
Measuring potential difference Potential difference is measured using a device called a . Just like ammeters, some types have a pointer on a dial, but most have a digital display. However, unlike an ammeter, you must connect the voltmeter in parallel to measure the potential difference across a component in a circuit.
Can someone plz help me on this, it would me alot to me
thx
Answer:
its a opinonated question
Explanation:
XD
car moves 5km East,3km south,2km West, 1km north find displacement
(please show me the way)
Answer:
3.605551275463989
Explanation:
solve using Pythagorean theorem
A plane travels at a constant speed of 250 m/s as it flies once around a horizontal circle whose radius is 2542m.
a) how long does it take to fly around the circle one ?
b) If the speed were to double, what would happen to the acceleration that the plane experiences ?
c) What is the current value of the acceleration that the plane experiences?
d) if possible, find the net force acting on the plane during this turn. If it’s not possible, what information are we missing?
Match the following. Match the items in the left column to the items in the right column.
1. geology
2. biology
3. molecular clock
4. sediment
5. chemistry
terms
a branch of physical science that focuses on composition, structure, properties and change of matter
dirt, pieces of rock, and the remains of living things at the bottom of oceans, seas, and lakes
a branch of earth science that focuses on the study of the rock
the study of life
a technique for estimating the age of species by comparing molecular differences between species
Answer:
geology - a branch of earth science that focuses on the study of the rock
biology - study of life
molecular clock - a technique for estimating the age of species by comparing molecular differences between species
sediment - dirt, pieces of rock, and the remains of living things at the bottom of oceans, seas, and lakes
chemistry terms - a branch of physical science that focuses on composition, structure, properties and change of matter
Explanation:
Pretty sure that's all correct. Hope this helps
A uniform marble rolls down a symmetric bowl, starting from rest at the top of the left side. The top of each side is a distance h above the bottom of the bowl. The left half of the bowl is rough enough to cause the marble to roll without slipping, but the right half has no friction because it is coated with oil.
Answer:
[tex]h' = \dfrac{5}{7}h[/tex]
Explanation:
To find how far will the smooth side will the marble go in the upper direction, measured vertically from the bottom (leave your answer in terms of h)?
From the given information:
The potential energy for the marble starting at rest is:
PE = m*g*h
In the bottom of the bowl; the marble exhibit a linear and rotational K.E
[tex]K.E_{total} = K.E _{linear} + K.E _{rot}[/tex]
[tex]K.E_{total} = \dfrac{1}{2}mv^2+I\omega^2[/tex]
[tex]K.E_{total} = \dfrac{1}{2}mv^2+ \dfrac{1}{2}( \dfrac{2}{5}mR^2) ( \dfrac{v}{R})^2[/tex]
[tex]K.E_{total} = \dfrac{1}{2}mv^2+ \dfrac{1}{5}mv^2[/tex]
[tex]K.E_{total} = (\dfrac{5+2}{10})mv^2[/tex]
[tex]K.E_{total} = \dfrac{7}{10}mv^2[/tex]
By applying Conservation of energy, The Total Energy occurring in the marble when it started at rest is the same as the total energy when it gets to the midpoint in the bowl.
i.e.
[tex]P.E = K.E_{total}[/tex]
[tex]mgh = \dfrac{7}{10 }mv^2[/tex]
10 × mgh= 7mv²
making v² the subject of the formula, we get:
[tex]v^2 = \dfrac{10}{7 }gh[/tex]
Let us remember that the rotational K.E occurring at the midpoint of the bowl is still unchanged at the time the marble is moving to the left side.
Thus, by applying the Conservation of energy balance:
The linear K.E at the midpoint = The P.E of the marble
∴
[tex]\dfrac{1}{2}mv^2 = mgh'[/tex]
Making h' the subject, we get:
mv² = 2mgh'
Divide both sides by m
v² = 2gh'
Recall that [tex]v^2 = \dfrac{10}{7 }gh[/tex]
[tex]\dfrac{10}{7} gh = 2gh'[/tex]
10 gh = 14 gh'
Divide both sides by 2g
5h = 7h'
[tex]h' = \dfrac{5}{7}h[/tex]
Scott was watching the electrician install a new light fixture. Scott noticed that when he was finished, he carefully wrapped some wires with plastic caps and black plastic tape. Select the best explanation of why the electrician would wrap electrical wires with plastic products.
Answer: The electrician wrapped the wires with plastic caps because plastic is an insulator.
Explanation: Metals are excellent conductors of electricity, largely because electrons in the metal are only loosely bound by their respective atoms and thus will readily flow under the influence of an external electric field. Plastics are very different. All the electrons in plastics are tightly bound by their respective molecules and it would take a lot of energy to remove them. Consequently, most plastics are insulators that do not conduct electric current (or do so only poorly).
What is the most abundant gas in the atmosphere?
Group of answer choices
Oxygen
Nitrogen
Carbon Dioxide
Water Vapor
Answer: Nitrogen
Explanation: Nitrogen makes up 78% of the atmosphere, Oxygen makes up 21%, and Argon 0.9%.
Water vaper makes up between 1-4%, depending on the region.
Carbon Dioxide makes up only about 0.04%.
Answer: The answer is: Nitrogen
Explanation: I have my ways ;>
A subwoofer needs a household voltage of 110 V to push a current of 5.5 A through its coil. What is the resistance of the subwoofer?
Answer:20Ω
Explanation:
An object with a mass of 1500kg accelerates 10.0m/s when unknown force is applied to it. What is the amount of force?
Answer:
The answer is 15000 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 1500 × 10
We have the final answer as
15,000 NHope this helps you
Answer:
15000 N
Explanation:
What is the mass of a bird if it has a potential energy of 147J when flying at a height of 30 m above the ground?
Answer:
0.5kg
Explanation:
Given parameters:
Potential energy = 147J
Height = 30m
Unknown:
Mass of the bird = ?
Solution:
Potential energy is the energy due to the position of a body. Now, the expression for finding the potential energy is given as;
P.E = mgH
m is the mass
g is the acceleration due to gravity = 9.8m/s²
H is the height
147 = m x 9.8 x 30
m = 0.5kg
A vector quantity is a quantity that has:
A.time and direction
B.magnitude and direction
C.direction only
D.magnitude and time
Answer:
B
Explanation:
a vector quantity has direction and magnitude
Can someone help me or find the answers to this chart please?
Explanation:
this is too though bro do it by ur self
What must be done to the wires used to make an electromagnet before they are connected
Answer:
Neatly wrap the wire around the nail
Explanation:
hope this helps ( not sure tho )
Before connecting the wires used to make an electromagnet, several steps are necessary. The steps are removing insulation from wire ends and cleaning and connecting the prepared wire ends.
First, the insulation surrounding the wire ends must be removed using a blade. Next, the exposed ends should be cleaned with a wire brush or sandpaper to eliminate any dirt or oxidation. Depending on the requirements, the wires can be twisted together for a temporary connection or soldered for a more secure joint. Lastly, the prepared wire ends are connected as needed to complete the circuit.
Therefore, these steps ensure that the wires are properly prepared, allowing for effective current flow and the formation of a functional electromagnet.
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Q4. Cheetahs have a top speed of 120 km/h and can accelerate at a constant rate of 9.5 m/s2. How long would it take a cheetah, stalking its prey at 4.2 m/s, to reach its top speed?
When two objects collide, they experience the exact same amount of force in opposite directions.
O True
O False
Answer:
True
Explanation:
In a collision between two objects, both objects experience forces that are equal in magnitude and opposite in direction. Such forces often cause one object to speed up (gain momentum) and the other object to slow down (lose momentum).
as you heat a piece of wood on a fire, the temperature of the wood increases. what does this tell you?
a. the molecules in the wood are vibrating faster
b. the total thermal energy of the wood is decreasing
c. the chemical energy of the wood is increasing
d. the molecules in the wood are vibrating more slowly
Answer:
A.
Explanation:
I remember this one from my science class.
The molecules in the wood are vibrating faster .
What is Heating?During heating, the temperature of any object or substance increases. This cause the particles to move faster as they gain kinetic energy which leads to an increase in the collision rate as well as diffusion.
Heat is the result of the movement of kinetic energy within a material or an item, or from an energy source to a material or an object. Radiation, conduction, and convection are the three mechanisms through which such energy can be transferred.
The International System of Units (SI) defines the calorie (cal) as the standard unit of heat. The cal measures the amount of energy transfer needed to raise the temperature of one gram of pure liquid water by one degree Celsius, provided that the water is above the freezing point and below the boiling point.
Therefore, The molecules in the wood are vibrating faster .
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Which two explanations are based on personal beliefs?
I A. Certain mineral crystals have properties that help protect the
body from illness.
IB. A constellation's position in the night sky can be used to predict
events in a person's life.
I C. Medical data gathered over many years show that lack of
adequate sleep causes health problems.
D. Observations using microscopes reveal that all known organisms
are composed of tiny structures called cells.
I E. Data gathered during experiments show that there is an inverse
relationship between the force of gravity and distance.
Answer:
The correct options are A and B
Explanation:
Personal beliefs can be described as beliefs that have not been scientifically proven. These beliefs are generally as a result of religion, culture or tradition. Scientifically in theory, these beliefs lack clear path of possibility. For example, being in possession of certain mineral crystals in order to help protect the body against illness have a little possibility of being scientifically (in theory) explained. There is also no scientific evidence to support this claim.
There is also no scientific evidence to support the idea of the constellation's position to predict events in a person's life. This also has little possibility of being theoretically explained in science.
It should however be noted that there are exceptions/coincidences that suggest these events happen as it has been listed in the two options.
Answer: A and B!
Explanation: Just took the quiz.
I need the answer now
Answer:
It's C) color
Explanation:
--------
Study the arrow that is circled in the image.
What happens at this point?
Warm air is rising.
Cool air is sinking.
There is a difference in air pressure.
Cool air is less dense than warm air.
Answer:
There is a difference in air pressure.
Explanation:
I hope this helps you, BTW I got this right when I did the test
The given point is the separation between hot and cold current as a result of difference in air pressure.
What is a convection current?A convection current is a type of heat transfer that occurs from the movement of hot air and cold air due to difference in air pressure.
Upward arrowThe upward arrow shows hot air rising up due to its low density.
Downward arrowThe downward arrow shows cold moving downwards to replace the risen hot air due to its high density.
Thus, the difference in air pressure between the hot air and cold air is causes convection current.
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