PLZ HELP
A wave has a wavelength of 4.9 m and a velocity of 9.8 m/s. The medium through which this wave is traveling is then heated so that the velocity is doubled.
If the frequency remains constant, what is the wavelength of the heated wave?
2.5 m
9.8 m
14.7 m
19.6 m
Answers
Answer: the wavelenght is 9.8 meters
Explanation:
We can use the relationship:
Velocity = wavelenght*frequency.
Initially we have:
wavelenght = 4.9m
velocity = 9.8m/s
then:
9.8m/s = 4.9m*f
f = 9.8m/s/4.9m = 2*1/s
now, if the velocity is doubled and the frequency remains the same, we have:
2*9.8m/s = wavelenght*2*1/s
wavelenght = (2*9.8m/s)*(1/2)s = 9.8 m
Answer:
B on Edge
Explanation:
Took the test
Related Questions
the acceleration of a car is 5m/s² . what is the elapsed time for it to accelerate from 10 m/s to 50 m/s
show work.
Answers
Answer:
Time taken to accelerate is 8s.
Explanation:
\(v=u+at\)
\(50=10+5t\)
t=8
Compare the periodic table of energy levels to the Lewis dot diagrams. Look at the dots around each symbol and the energy levels in your chart. What relationship do you notice between the dots in these two charts?
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Answer:
hi what doing
Explanation:
HELP ME PLEASE! IF NOT THEN DON'T ANSWER PLEASE. THANK YOU!
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Gravity is a force that pulls an object down towards the Earth. Can we see the force of gravity?
Answers
Answer:
hope my answer helps you mark me brianliest （⌒▽⌒）
Explanation:
Even you exert a gravitational force on other objects. Because your mass is so much less than the mass of the Earth, you can't feel your gravitational force. ... Because the Earth's gravity has the same pull on every object, all objects fall at the same speed (in a vacuum),and alsoGravity not only pulls on mass but also on light. Albert Einstein discovered this principle. If you shine a flashlight upwards, the light will grow imperceptibly redder as gravity pulls it. You can't see the change with your eyes, but scientists can measure it.
Which statement describes an example of static electricity?
O A. When a light switch is flipped, electrons flow to a lightbulb.
O B. Positively and negatively charged particles are attracted to each
other.
O C. Wind turns a generator, causing electrons to flow into power lines.
O D. Electrons move from one end of a copper wire to another.
Answers
Positively charged and negatively charged particles of material are attracted by each other. Therefore, statement (B) is an example of static electricity.
What is static electricity?Static electricity can be described as an imbalance between the electric charges in an object, which is actually the imbalance between the positive and the negative charges on a body.
The imbalance in the charge is described the static electricity. The contact between solid objects is one of the most common causes of static electricity.
In static electricity, the movement of protons cannot be possible and the movement of electric charge is due to electrons. Electrons in materials are held loosely, so they can be easily exchanged via simple contact such as rubbing.
Such charges can be collected on the surface of a body until they find a to get discharged. The way to discharge is generally through a circuit. Static electricity is the electric field that is generated due to stationary charges. The electric charges on the surface involve which combine the static electricity on the material.
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Explain how water is controlled to generate electrical energy in hydro-electric dams. and show a diagram is help explain the answer.
Answers
Hope this helps can’t do the diagram part.
Describe 3 factors an engineer should take into consideration when choosing material for building the pipes in a pipeline
Gr. 8
Think it has something to do with Viscosity, Density, and Pressure but not sure what
Answers
Answer: 1. Material being transported 2. The temperature of the material being transported 3. How long the pipes will be there (lifespan)
Explanation: 1. - The pipe builder should consider the material being transported to choose the correct material of the pipes to use, so they last long and can hold the material.
2. - Similar to 1, the pipe builder should consider the temperature of the material to choose the correct material of the pipes to use, so the pipes don’t break and function properly.
3. - If the pipe builder uses a material that can hold the material, that’s great! If that material will last a short time, it would not work if the pipes were to be used for a long time.
The things you said before about viscosity, density, and pressure are also correct. The correct answers are mainly talking about factors of the material being used in the pipes.
hope this helped :)
Suppose you apply a force of 75 N to a 25-kg object. What will the acceleration of the object be?
To solve, I would use the equation:
Acceleration= (final velocity- starting velocity)/change in time
True
False
Answers
Answer:
I belive it would be ture
Explanation:
It's been a while since I learned this but I think that is right.
What are all the ways energy is transferred as the tea kettle is heated, the steam turns the turbine, and the lightbulb lights up?
Answers
Answer:
In a kettle, electrical energy is transformed into thermal energy.
Most energy is transferred into heat energy inside a lightbulb, thats why most ordinary electric lamps contain a thin metal filament that glows when electricity passes through it.
When the steam turn’s the turbine, it is turned into kintetic energy.
Do you think humans are messing up the world's balance between organisms? Explain.
Answers
Answer:
yes i do becuase humans are here but by being here they disrupt the structure of plants and animals.
Explanation:
This is a science question
Answers
The air currents across the continents would determine the distribution of the air.
What are air currents?Air currents across the continents are primarily driven by temperature differences and the rotation of the Earth. The warm air near the equator rises and flows towards the poles, while the cooler air near the poles sinks and flows towards the equator.
This creates large-scale circulation patterns known as Hadley cells, Ferrell cells, and Polar cells. These cells are responsible for the trade winds, westerlies, and easterlies, respectively. Additionally, there are also local winds caused by differences in terrain, such as sea breezes and valley breezes.
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The transfer of energy by electromagnetic
#A. Radiation
#B. Convection
#C. Conduction
#D. Thermal energy
Answers
Answer:
Explanation:its thermal energy.There are three methods of thermal energy transfer: conduction, convection, and radiation
A student sorted mineral samples into two groups: dull and shiny. Which of the following properties did the student use to sort the mineral samples into groups? a
streak
b
luster
c
cleavage
d
color free brainliest
Answers
B: Luster
This is about physical properties used in classification of minerals.
The four basic properties used to identify minerals from the ground are;
1) Luster; this is a property which shows how well the reflection occurs when a mineral is exposed to light.
2)color; different minerals have different colors and this is a good property to identify minerals.
3) diaphaneity; this is defined as the ability of a mineral to have light transmitted through it.
4) shape: this is also a good property to identify minerals.
There are other properties used to identify minerals like streak which is the colour of the powdered form of a mineral, hardness, fracture e.t.c.
Now,we want to classify the mineral samples as either dull or shiny. For a mineral to be dull, it means it will not be able to reflect light properly whereas if it is shiny, light will easily be reflected from it.
The only property of minerals in the options that corresponds with shiny or dull is the Luster property.
Thus, option B is correct.
Read more at; brainly.com/question/10680778
PLEASE HELP ME!The three vehicles shown below are driving down the street at a constant velocity of 5 m/s. The blue car has a mass of 700 kg. The red car has a mass of 1800 kg. The silver pickup truck has a mass of 3500 kg. Annie-Drew wants to make a line graph showing the relationship between the kinetic energy and mass of the cars traveling at a constant velocity. What would the graph look like?
Answers
Answer:
It's the last graph D.
Explanation:
Another question sorry about the last one here is my question
7. Challenge: The unit of force is the newton (N). One newton is the force required to accelerate a 1-kg object at a rate of 1 m/s2.
Suppose each fan supplies a force of 2 N. Use Newton’s second law (F = ma) and the Gizmo to find the following.
(Hint: you will have to calculate the total mass for one or more given situations)
A. The mass of the cart: __
B. The mass of a fan: __
C. The mass of one of the draggable mass units: __
Answers
Answer:
I think the answers are A = 2.0kg, B = 0.5kg and C = 2.5 kg
Explanation:
how are the states of matter changed by the introduction of heat?
Answers
Answer:
Melting
Explanation:
The states of matter changed by the induction of heat from a lava lamp is by melting. For example, if you put a ice cube which is a solid under a lava lamp it will melt and become a liquid.
The Bill and Melinda Gates Foundation hires you as a consultant to determine how best to use $20 billion to save the world and make it a better place to live. You cannot spend $1 on yourself or your family. What’s your plan? Who would you help? What would you do?
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Answer:
I like writing sentences, cama cama cama shake your body do that conga yeah shake your body baby do that conga come on shake your body baby do that Conga come on shake your body baby do that cngaaaaaaa
Explanation:
Which describes an object in projectile motion?
o Gravity acts to push the object sideways.
o The object moves in a straight path.
o The forward velocity of the object is 0 m/s.
o The object’s inertia carries it forward.
Answers
Answer:
s.
o the object's inertia carries it forward.
A couple wants to build a holiday cottage, the cottage is not connected to an electricity grid, but the cottage is next to a small river. The river is always flowing and never dries up, the weather is often windy.
Which one should they get to receive energy.
a wind turbine
solar cells
Answers
Answer:
Wind turbine since the place is often windy
Calculate the change in the kinetic energy (KE) of the bottle when the mass is increased. Use the formula
KE = one half.mv2, where m is the mass and v is the speed (velocity). Assume that the speed of the soda bottle falling from a height of
0.8 m will be 4 m/s, and use this speed for each calculation.
Record your calculations in Table A of your Student Guide.
When the mass of the bottle is 0.125 kg, the KE is
kg m2/s2.
When the mass of the bottle is 0.250 kg, the KE is
kg m2/s2.
When the mass of the bottle is 0.375 kg, the KE is
kg m2/s2.
When the mass of the bottle is 0.500 kg, the KE is
kg m2/s2.
Answers
1. The kinetic energy of the bottle is 1 Kg.m²/s²
2. The kinetic energy of the bottle is 2 Kg.m²/s²
3. The kinetic energy of the bottle is 3 Kg.m²/s²
4. The kinetic energy of the bottle is 40 Kg.m²/s²
How do I determine the kinetic energy?The kinetic energy can be obtain as illustrated below:
1. For mass 0.125 Kg
Mass (m) = 0.125 KgVelocity (v) = 4 m/sKinetic energy (KE) =?KE = ½mv²
KE = ½ × 0.125 × 4²
Kinetic energy = 1 Kg.m²/s²
2. For mass 0.250 Kg
Mass (m) = 0.250 KgVelocity (v) = 4 m/sKinetic energy (KE) =?KE = ½mv²
KE = ½ × 0.250 × 4²
Kinetic energy = 2 Kg.m²/s²
3. For mass 0.375 Kg
Mass (m) = 0.375 KgVelocity (v) = 4 m/sKinetic energy (KE) =?KE = ½mv²
KE = ½ × 0.375 × 4²
Kinetic energy = 3 Kg.m²/s²
4. For mass 0.500 Kg
Mass (m) = 0.500 KgVelocity (v) = 4 m/sKinetic energy (KE) =?KE = ½mv²
KE = ½ × 0.500 × 4²
Kinetic energy = 40 Kg.m²/s²
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The change in kinetic energies are 1 \(kg m^{2}/s^{2}\), 2 \(kg m^{2}/s^{2}\), 3 \(kg m^{2}/s^{2}\), and 4 \(kg m^{2}/s^{2}\) respectively as the mass of the bottle is changed as 0.125kg, 0.250kg, 0.375kg, and 0.500kg.
Given the velocity v=4m/s.
KE=\(1/2 mv^{2}\)
Here KE represents the Kinetic energy of the bottle, m represents the mass of the bottle which is varying time to time, and v represents the velocity of the bottle which is constant over time.
For the first case:
Given mass m=0.125kg
∴KE=\(1/2mv^{2}\)
=1/2*(0.125)*(4)²
=1 \(kg m^{2}/s^{2}\)
Hence the change in kinetic energy of the bottle when it became 0.125kg is 1 kg m²/s².
For the second case:
Given mass m=0.250kg
∴KE=\(1/2mv^{2}\)
=1/2*(0.250)*(4)²
=2 \(kg m^{2}/s^{2}\)
Hence the change in kinetic energy of the bottle when it became 0.250kg is 2 kg m²/s².
For the third case:
Given mass m=0.375kg
∴KE=\(1/2mv^{2}\)
=1/2*(0.375)*(4)²
=3 \(kg m^{2}/s^{2}\)
Hence the change in kinetic energy of the bottle when it became 0.375kg is 3 kg m²/s².
For the final case:
Given mass m=0.500kg
∴KE=\(1/2mv^{2}\)
=1/2*(0.500)*(4)²
=4 \(kg m^{2}/s^{2}\)
Hence the change in kinetic energy of the bottle when it became 0.500kg is 4 kg m²/s².
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The first and second laws apply to _________________ objects.
single or multiple
no
multiple
single
Answers
Answer:
multiple
Explanation:
Discuss one component of your school's recycling system that could be automated and predict the economic impact.
Answers
One component of my school's recycling system that could be automated is the sorting of recyclables. Currently, the school relies on students and staff to sort recyclables into the appropriate bins, which can be time-consuming and may result in contamination if materials are not sorted properly.
Automating the sorting process with a machine or conveyor belt system could improve the efficiency and accuracy of the recycling system. It could also potentially reduce labor costs associated with manual sorting.
The economic impact of automating the sorting process would depend on the initial cost of the equipment and any associated installation or maintenance costs. However, over time, the improved efficiency and accuracy of the system could result in cost savings for the school. Additionally, the increased efficiency of the system could potentially lead to increased recycling rates, which could result in cost savings for waste disposal and potentially generate revenue through the sale of recycled materials.
Answer:
Our school has color coded virtual trash cans. For example, a trash can for only paper will only accept paper items, if the item put inside is not paper, it will litter it out and all students have cleaning duties throughout the week so even if you or someone litters you’ll probably have to clean it up at some point anyways. I honestly think it’s very cool. (i wish this was true smh).
What are all the parts of a microscope?
Answers
2.nosepiece
3.objective lenses
4.stage clips
5.stage
6.diaphragm
7.illuminator
8.evepiece/ ocular lens
9. arm
10. coarse focus
11. fine focus
12.base
Answer:
Eyepiece Eyepiece tube Objective lenses Nose piece The Adjustment knobs StageApertureMicroscopic illuminator Condenser Diaphragm Condenser focus knob Abbe Condenser The rack stopUsing proper units is important when recording data. In this lab, you determined three properties of the objects: mass, volume, and density. What are the units for each property?
The units used for mass were
The units used for volume were
The units used for density were
Answers
Answer:
The units used for mass were
✔ grams
The units used for volume were
✔ cubic centimeters
The units used for density were
✔ grams/cubic centimeter
Explanation:
check marks show i got it right
Answer:
The units used for mass were
✔ grams
.
The units used for volume were
✔ cubic centimeters
.
The units used for density were
✔ grams/cubic centimeter
.
Explanation:
please answer all 5 ....
Answers
Answer:
a
Explanation:
just needed the points sorry
Please can someone help me need help with these 5 questions!! and QUICK!
I need it done REALLLLLYYYYY soon!! (more like now but-)
(20 points for the answer to all of them)
Answers
Answer:
10. dependent as a change has occurred which has affected something else which is measurable.
11. dependent as a change is made to the environment this is why some species cannot live there as they have adapted to the climate.
12. Dependent due to change occurring it has resulted in the population decreasing which is measurable.
13. Dependent as the animal's and plants' survival is reliant on the environment.
14. Dependant as the plants require sunlight for photosynthies
Answer:
All are dependent
Explanation:
Cake, battery, boiling water, a flying kite, a flower vase on top of a table
Which of the items above have
a) Thermal energy
b) Kinetic energy
c) Gravitational potential energy
d) Chemical energy
Answers
But correct me if I’m wrong
Answer:
c i belive or maybe d i would think its one of those
Explanation:
22= 1/2 9.8 t^2
22 is the distance the ruler fell and I am trying to find out the calculation reaction time thanks if you find out
Answers
Answer:
5790 i dony kiow
Explanation:
The Structure of Atoms
1. What two sub-atomic particles are located in the nucleus of the atom?
2. What is the difference between the atomic number & the mass number of an element?
3. Where is the majority of the mass located in an atom?
Answers
Answer:
1. protons and neutrons
2. the atomic number states the number of protons present and the mass number says the total number of protons and neutrons
3. nucleus
Explanation:
I WILL GIVE BRAINLYEST AND LOTS OF POINTS
Answers
Hope this helped!
Answer:
Not alot of points bitc-
Explanation: