Answer:
glucose
Explanation:
How does the Doppler effect cause a siren's pitch to increase as it
approaches you?
O A. Sound waves are spread out, decreasing wavelength and
increasing frequency.
B. Sound waves are spread out, increasing wavelength and
decreasing frequency.
O C. Sound waves are pushed closer together, increasing wavelength
and decreasing frequency.
D. Sound waves are pushed closer together, decreasing wavelength
and increasing frequency.
Answer:
C
Explanation:
Because I said so
When a sound source approaches us, it sounds like more pushed towards the observer with a decreased wavelength and increasing frequency. As its frequency increases, its energy and intensity increases.
What is Doppler effect ?A wave's frequency changes in response to an observer moving in respect to the wave source, which is known as the Doppler effect or Doppler shift.
The apparent pitch increases as one gets closer to a blowing horn until they reach it, then decreases as they pass it. This is an example of the Doppler effect.
Similar to how a star's light changes as seen from earth by moving toward the red end of the spectrum that is lower frequency or longer wavelength when the Earth and star are moving apart, and toward the violet end of the spectrum when they are drawing nearer. Therefore, option D is correct.
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HELP I DON'T PAY ATTENTION ENOUGH
Answer:
I think 1 is d and 2 is A
Explanation:
but I may be wrong and I am so sorry if I am
Answer: Well the first one is D. The second one would be A because if you do the research and eliminate the other ones, these answers would have to be the correct ones following the reading and checking websites
Explanation:
how to tell how much work gravity does on something?
A student rings a brass bell with a frequency of 100 Hz. The sound wave travels through brass, air, and glass. What is the wavelength of the wave in brass? A. 0.021 m B. 4.7 m C. 0.21 m D. 47 m
If a student rings a brass bell with a frequency of 100 Hz. The sound wave travels through brass, air, and glass, then the wavelength of the wave in brass would be 47 meters, therefore the correct answer is option D.
What is a sound wave?It is a type of mechanical wave composed of the disturbance caused by the movements of the energy. A sound wave travels through compression and rarefaction in an elastic medium such as air.
As given in the problem if a student rings a brass bell with a frequency of 100 Hz. The sound wave travels through brass, air, and glass, then we have to find out what is the wavelength of the wave,
The wave velocity = Frequency of the wave ×wavelength
4700 = 100 × wavelength
Wavelength = 4700 / 100
=47 meters
Thus, the wavelength of the wave would be 47 meters .
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How does the initial velocity of a projectile affect its range?
N - Projectiles with larger initial velocity will go farther
0 - Projectiles with larger initial velocities will not go as far
P-Initial velocity has no effect
Plzzz yaar guys help I really need this ( crying emoji )
Answer:
I believe it is the first one
1. Calculate the momentum of the rolled ball for each trial using the formula p = mv. Show your work below and record your answers on your data table.
2. Graph the relationship between the momentum of each ball and the distance that the softball moved. The s-axis should be momentum (kg.m/s), and the y-axis should be distance (meters). Attach your graph paper to your lab report.
3. By looking at the graph, what can you conclude about the relationship between the momentum of the colliding ball and the distance the softball moved?
4. Explain why bowling balls have such a large mass. What would happen if you tried to bowl with a ping pong ball? Explain
5. When you bowl, should you roll the ball gently? Explain your answer.
You want us to answer all of those or-??
what could become faster If time would slow down(or even reversed)
Answer:Acceleration
Explanation:Acceleration
increases at time decreases
Answer:
Acceleration
Explanation:
ILL MARK BRAINLEST
Question 13: A food web of the Yellowstone National Park ecosystem is
provided below. If a sudden outbreak of disease severely reduced the
number of wolves in Yellowstone National Park very rapidly, what are two
changes that might happen to the local food web? Fully explain using
claim, evidence, and reasoning.
Answer:
they all will die and so will we
Explanation:
Answer:
3 animals will thrive better
Explanation:
If the number of wolves is reduced, 3 animal species usually eaten by the wolves will have a better chance of survival.
PLS ASAP!
An airplane increases its speed at the average rate of 15 m/s2 . how much time does it take
to increase its speed from 100 m/s to 160 m/s ?
10 seconds
4 seconds
15 seconds
Answer:
it take 15 seconds
Explanation:
it take 15 seconds to increase it time
If the resistance in a constant voltage circuit is doubled what will the power dissipated by the circuit be
Answer:
Explanation:
Decrease to one half of its original value
A student walks 160m in 150s. the student stops for 30s and then walks 120m father in 140s what is the average speed of the entire walk?
Answer:
Explanation:
Average speed is always: ( total distance traveled ) / ( time elapsed )
The time for the walk is +150+%2B+30+%2B+140+=+320+ s
The distance traveled is +160+%2B+210+=+370+ m
( total distance traveled ) / ( time elapsed ) = +370+%2F+320+=+1.156+ m/s
PLEASE HELP
Adam weighs roughly 667 N. Remember that weight is a force due to the gravitational pull on an object.
Find Adam's Mass. (remember weight = mass x gravity. Rearrange this formula to solve for mass. Mass =
weight / gravity)
A resistor of 3.6ohms is connected in seris with another of 4.56ohms. What resistance must be placed across 3.6ohms so that total resistance of the circuit shall be 6ohms
Answer:
2.34ohmsExplanation:
Let the resistance placed across the 3.6ohms be x, this means that they are both connected in parallel and then in series to 4.56 ohms;
The equivalent resistance is expressed as;
RT = (1/3.6+1/x) + 4.56
RT = 3.6x/3.6+x + 4.56
Since RT = 6ohms
6 = 3.6x/3.6+x + 4.56
6 - 4.56 = 3.6x/3.6+x
1.44= 3.6x/3.6+x
1.44(3.6+x) = 3.6x
5.184+ 1.44x = 3.6x
5.184 = 3.66x - 1.44x
5.184 = 2.22x
x = 5.184/2.22
x = 2.34 ohms
Hence the resistance that must be placed across 3.6ohms so that total resistance of the circuit shall be 6ohms is 2.34 ohms
Sirius A is 8.6 light-years from Earth. What is this distance in kilometers? What is this distance in feet?
Answer:
a. 8.136 × 10¹³ km b. 2.669 × 10¹⁹ feet
Explanation:
a. What is this distance in kilometers?
Since Sirius A is 8.6 light years away from Earth and one light year = distance travelled by light in a year = 3 × 10⁸ m/ s × 365 days/year × 24 hr/day × 3600 s/hr = 9.4608 × 10¹⁵ m = 9.4608 × 10¹² km.
Then 8.6 light years = 8.6 × 1 light year
= 8.6 × 9.4608 × 10¹² km
= 81.363 × 10¹² km
= 8.1363 × 10¹³ km
≅ 8.136 × 10¹³ km
b. What is this distance in feet?
Since 1 meter = 3.28 feet,
8.6 light years = 8.1363 × 10¹² km
= 8136.3 × 10¹⁵ m
= 8136.3 × 10¹⁵ × 1 m
= 8136.3 × 10¹⁵ × 3.28 feet
= 26687.1 × 10¹⁵ feet
= 2.66871 × 10¹⁹ feet
≅ 2.669 × 10¹⁹ feet
Need help asapppp
Thanks + BRAINLIST only if you know correct answer
Electromagnetic waves are
a. forms of matter
b. forms of space
C. longitudinal waves
d. transverse waves
Answer:
hi have a nice day
Explanation:
i think forms of space
Answer:
Transverse waves
Explanation:
EM waves are made up of photons, which are massless particles. These waves propogate (travel) through space at the speed of light as transverse waves, waves that move back and forth perpendicular to the direction they're travelling in, as opposed to longitudinal waves, which move back and forth along the path of travel.
chris swims across a pool he does the first lap (0 - 50 meters) in 4 second lap (50 - 100 meters) in 6 seconds
Answer:
Do i ansa that?
Explanation:
Guys this is urgent and I don’t know please help me I will mark brainliest!
Have a good day/night!!!
Answer:
Not acted upon there is no motion
Forces acted upon there is motion
You can refer to the definition stated below:
Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. This is normally taken as the definition of inertia. ... If that velocity is zero, then the object remains at rest.
Movement of water though the membrane is called?
Answer:
Its called diffusion :)
Explanation:
Which is a primary energy source used by power plants to generate electricity
A:wind power
B:solar
C:coal
D:hydropower
Answer:
it would be coal
Explanation:
coal is the most used energy source in many countries as of China , India and, the United States
Coal is a primary energy source used by power plants to generate electricity
Electricity generation plants convert the chemical energy of fuel into electricity. Coal, oil, natural gas and nuclear fuels are the energy sources most commonly used for generating electricity.
What is coal ?"Coal is a combustible black or brownish-black sedimentary rock with a high amount of carbon and hydrocarbons. Coal is classified as a nonrenewable energy source because it takes millions of years to form. Coal contains the energy stored by plants that lived hundreds of millions of years ago in swampy forests."
What is electricity?"A fundamental form of energy observable in positive and negative forms that occurs naturally (as in lightning) or is produced (as in a generator) and that is expressed in terms of the movement and interaction of electrons. "
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Which list orders the types of forces from weakest at the top to strongest at
the bottom?
O A. Hydrogen bonds
Van der Waals forces
Metallic bonds
lonic bonds
B. Metallic bonds
Hydrogen bonds
Van der Waals forces
Ionic bonds
O C. Van der Waals forces
Hydrogen bonds
Metallic bonds
lonic bonds
D. Ionic bonds
Metallic bonds
Hydrogen bonds
Van der Waals forces
The list of the type of forces that are weakest at the top to strongest at the bottom is
Ionic bonds Metallic bondsHydrogen bondsVan der Waals forcesWhat are the types of forces?The type of force that impacts the objects are physical, tension and normal, gravitational, electric, and magnetic force. The force that is strongest is that of the iconic bonds and the weakest is that of the Van der Waals force.
Find out more information bout the types of forces.
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Answer:
C. Van der Waals forces
Hydrogen bonds
Metallic bonds
Ionic bonds
Explanation:
This list orders the types of forces from weakest at the top to strongest at the bottom. Van der Waals forces are relatively weak intermolecular forces, followed by hydrogen bonds which are stronger. Metallic bonds are even stronger, and ionic bonds are the strongest among the listed forces.
How does the thermoflask prevent heat loss
Answer:
The way that the flask is built it has 3 protective layers.... the inside layer to keep the heat in, the outside layer to reflective the cold, and a vacuum layer, which is an empty layer that limits conduction and convection
Explanation:
27. Improvements in space technology have greatly helped scientists better understand the stars, planets, and other
celestial bodies in our universe. How do technological advances in astronomy benefit our society on Earth?
A. Technological advancements in astronomy allow scientists to better understand Earth and find solutions to
preventing global warming
B. Technological advancements in astronomy have led to the development of thousands of products such as
new materials, medical devices, and communications satellites.
C. Technological advancements in astronomy have led to the development of many theories of how the
universe began and how the Earth formed.
D. Technological advancements in astronomy have helped improve our society's economy.
Answer:
B
Explanation:
Technological advancements in astronomy have led to the development of thousands of products such as
new materials, medical devices, and communications satellites.
For example, the production of instruments like telescopes, microscopes, and other measuring devices now enables us to identify things that we couldn't examine with the naked eye.
Similarly, the development of communication satellites has led to the emergence and improvements in the mobile network industry.
Emma is conducting an investigation to compare several physical properties of samples of two different kinds of rocks. When she measured and compared the masses of the two rocks, she found that rock 1 had a greater mass than rock 2. Which of the following is the best prediction of how another property of the rocks will compare?
A. The density of rock 1 will be the same as the density of rock 2
B. The weight of rock will be the greater than the weight of rock 2
C. The volume of rock 1 will be less than the volume of rock 2
D. The state of matter of rock 1 will be different than that of rock 2
Answer:
B. The weight of rock 1 will be the greater than the weight of rock 2
Explanation:
We are told that the mass of rock 1 is greater than the mass of rock 2.
Now, weight is given by;
W = mg.
g is constant. Thus means that weight of rock 1 will be greater than weight of rock 2.
the length of iron rod at 100 C is 300.36 cm and at 159 C is 300.54 cm.Calculate its length at 0 c and coefficient of linear expansion of iron
Answer:
The length at 0 °C is 300.05 cm
Coefficient of linear expansion of iron is 1.02×10¯⁵ C¯¹
Explanation:
From the question given above, the following data were obtained:
Length (L₁) at 100 °C = 300.36 cm
Temperature 1 (θ₁) = 100 °C
Length (L₂) at 159 °C = 300.54 cm
Temperature 2 (θ₂) = 159 °C
Length (L₀) at 0 °C =?
Coefficient of linear expansion (α) =?
L₁ = L₀ (1 + θ₁α)
300.36 = L₀ (1 + 100α) ....(1)
L₂ = L₀ (1 + θ₂α)
300.54 = L₀ (1 + 159α) ..... (2)
Divide equation (2) by (1)
300.54 / 300.36 = L₀ (1 + 159α) / L₀ (1 + 100α)
1.0006 = (1 + 159α) / (1 + 100α)
Cross multiply
1.0006 (1 + 100α) = (1 + 159α)
1.0006 + 100.06α = 1 + 159α
Collect like terms
1.0006 – 1 = 159α – 100.06α
0.0006 = 58.94α
Divide both side by 58.94
α = 0.0006 / 58.94
α = 1.02×10¯⁵ C¯¹
Substitute the value of α into anything of the equation to obtain L₀. Here we shall use equation (2).
300.54 = L₀ (1 + 159α)
α = 1.02×10¯⁵ C¯¹
300.54 = L₀ (1 + 159 ×1.02×10¯⁵)
300.54 = L₀ (1 + 0.0016218)
300.54 = L₀ (1.0016218)
Divide both side by 1.0016
L₀ = 300.54 / 1.0016
L₀ = 300.05 cm
Summary:
The length at 0 °C is 300.05 cm
Coefficient of linear expansion of iron is 1.02×10¯⁵ C¯¹
Which machine can create images of atoms?
Answer: Scanning Tunneling Microscope
Explanation:
The answer is, of course, the greatest Star Trek fan art imaginable: images literally built out of individual atoms. The images are the work of IBM scientists who created the unique artwork with a two-ton machine called the Scanning Tunneling Microscope that moves single atoms across a tiny piece of copper.
Which phrase best describes a bird's skeleton
A certain quantity of a liquid has a volume of 10cm at 20°C. Calculate its volume at 50°C, if it’s cubic expansivity is 10^(-3) K^(-1)
Answer:
10.3 cm³
Explanation:
From the question given above, the following data were obtained:
Original volume (V₁) = 10 cm³
Initial temperature (θ₁) = 20 °C
Final temperature (θ₂) = 50 °C
Cubic expansivity (γ) = 10¯³ K¯¹
Final volume (V₂) =?
γ = V₂ – V₁ / V₁(θ₂ – θ₁)
10¯³ = V₂ – 10 / 10( 50 – 20)
10¯³ = V₂ – 10 / 10(30)
10¯³ = V₂ – 10 / 300
Cross multiply
10¯³ × 300 = V₂ – 10
0.3 = V₂ – 10
Collect like terms
0.3 + 10 = V₂
10.3 = V₂
V₂ = 10.3 cm³
Thus, the volume at 50 °C is 10.3 cm³
How many moles of oxygen atoms are in 2 moles of water?
Why is the Mid-Atlantic Ridge an ideal place for SWARM to collect electrical conductivity data?
Answer: Mid-ocean ridges are geologically important because they occur along the kind of plate boundary where new ocean floor is created as the plates spread apart. Thus the mid-ocean ridge is also known as a "spreading center" or a "divergent plate boundary." The plates spread apart at rates of 1 cm to 20 cm per year.
Answer: The mid-ocean ridge system is the most extensive chain of mountains on earth, but more than 90% of this mountain range lies in the deep ocean. The mid-ocean ridge wraps around the globe for more than 65,000 km like the seam of a baseball. The average depth to the crest (top) of the ridge is 2500 m, but it rises above sea-level in Iceland and is more than 4000 m deep in the Cayman Trough.
How does the final kinetic energy of the system in an inelastic collision compare to the initial kinetic energy?
Answer: In an inelastic collision, the total kinetic energy after the collision is not equal to the total kinetic energy before the collision. While inelastic collisions may not conserve total kinetic energy, they do conserve total momentum.
Explanation:
Hope this helps!The final kinetic energy is less than the initial kinetic energy.
What is kinetic energy?Kinetic energy is the form of energy that one possesses when he is in motion.
During an inelastic collision, the momentum of the system is conserved, but the total kinetic energy is not conserved.
Some part of the initial kinetic energy of the system gets lost in the form of heat, light, and sound produced during the collision. Consequently, the final kinetic energy must be less than the initial kinetic energy.
Thus, the final kinetic energy is less than the initial kinetic energy.
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