Answer:
0.05s
Explanation:
frequency = speed / wavelength = 20/1 = 20Hz. Thus period = 1/f = 1/20 = 0.05 s
This question involves the concepts of wave speed and wavelength.
The period of the wave is "0.05 s".
Period of the WaveThe wave speed is given in terms of wave frequency and wavelength as follows:
[tex]v=f\lambda\\\\f=\frac{v}{\lambda}[/tex]
where,
v = wave speed = 20 m/sλ = wavelength = 1 mf = frequency of wave = ?Therefore,
[tex]f=\frac{20\ m/s}{1\ m}\\\\[/tex]
f = 20 Hz
Now, the period of the wave is the reciprocal of the frequency of the wave:
[tex]Period = T=\frac{1}{f}\\\\T=\frac{1}{20\ Hz}[/tex]
T = 0.05 s
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approaching a dangerous intersection the driver slows her car from 40 meters per second to 15 meters per second in 5 seconds what is the acceleration
Answer:
- 5 m/s^2
Explanation:
Givens
vi = 40 m/s
vf = 15 m/s
t = 5 seconds
Formula
a = (vf - vi)/t
a = (15 - 40)/5
a = -25/5
a = - 5 m/s^2
Don't be bothered by the minus sign. It just means she is slowing down.
Question 4 of 10
If infrared waves can move information through air, what is the advantage of
sending their signals through networks of cables?
A. Cables are easy to maintain.
B. These waves need to travel only short distances.
C. Cables transmit infrared waves over longer distances.
O D. The denser the medium, the faster the wave.
Answer:
C. Cables transmit infrared waves over longer distances.
Explanation:
A.pex
Answer:
The answer is C.Cables transmit infrared waves over longer distances.
Explanation:
I took AP EX quiz.
Explain the term the refractive index of glass is 1.5
Answer:
Refractive index of a glass is 1.5 means that the speed of light travels 1.5 times SLOWER in that glass than in a vacuum.
Explanation:
Refractive index is defined as a ratio between the speed of light in a vacuum and the speed of light in a medium. Since the refractive index is a ratio between two speeds it is a dimensionless number. For the glass, having a refractive index of 1.5, means that the speed of light travels 1.5 times SLOWER in that glass than in a vacuum.
Which has more kinetic energy, a basketball rolling at a walking pace or a baseball rolling at the pace of someone running? How could we find out ?
Answer:
answer 2 because the baseball has less mass then the 1st one
Complete the sentence with the word "element" or "compound."
O is a(n) ____
and H2O2 is a(n) ____
.
Answer:
"element"= There are four basic sentence patterns based on sentence construction element
Answer:
1st one. Element
2nd one. Compound
Explanation:
The apparent height of a building 10.5 km away is 0.02 radians. What is the approximate height of the building to the nearest meter
Answer:
Approximate height of the building is 23213 meters.
Explanation:
Let the height of the building be represented by h.
0.02 radians = 0.02 × [tex]\frac{180^{o} }{\pi }[/tex]
= 0.02 x (180/[tex]\frac{22}{7}[/tex])
0.02 radians = 1.146°
10.5 km = 10500 m
Applying the trigonometric function, we have;
Tan θ = [tex]\frac{opposite}{adjacent}[/tex]
So that,
Tan 1.146° = [tex]\frac{h}{10500}[/tex]
⇒ h = Tan 1.146° x 10500
= 2.21074 x 10500
= 23212.77
h = 23213 m
The approximate height of the building is 23213 m.
Which two criteria are least important for engineers to consider when
developing a process to produce an important chemical?
A. The process should be located in a major city.
B. The process should use local, organic reactants.
c. The process should produce a significant amount of the product.
D. The process should be cost-effective.
Answer:
B C & D
Explanation:
should make you money, time well spent no time lost.
Answer:
B and C
Explanation: i looked at the test and i got it right
In the water cycle, water travels from bodies of water to the ____________. Then it travels back to the ground and to the oceans.
soil
mountains
air
lithosphere
Answer:
air
Explanation:
Water bodies are already found on the Earth's surface made up of soil which is part of the lithosphere
Which of the following concepts helps explain the modern technology used in 3D films?
a. retinal disparity
b. convergence
c. overlap (interposition)
d. stroboscopic movement
Answer:
a.
Explanation:
Help answer these questions please!
You only have to answer the first one unless it’s already been answered then answer the next one (if you could explain how you did it, it would be much appreciated :))
Answer:
1a: Lead atoms are heavier than aluminum atoms, which means that a given mass of lead contains fewer atoms than the same mass of aluminum. Since the heat required to raise the temperature depends on the number of atoms, it takes less heat to raise the temperature of the lead than the temperature of the aluminum.
I need it ASAP please
Answer:
Number 3 is C
Explanation:
It just makes sence
Why is training important?
To prevent dehydration when exercising on hot and humid days it is vital to:
Drink plenty of water only after you have exercised to avoid throwing up.
Drink water before, during, and after your exercise activity.
Wear fabric which keeps your sweat next to your body for cooling purposes.
Wear tight, constrictive clothing to help with aerodynamics.
Answer:
Drink water before, during, and after your exercise activity.
How do scientists study pollen grains to help them understand climate change?
by analyzing and making inferences about them
by observing and listing facts about them
by studying and reading more about them
by writing hypothesis about them
Answer: A. by analyzing and making inferences about them
Explanation:
Answer:
by analyzing and making inferences about them
Explanation:
Identify the career that matches the description.
Runs the front desk at a hotel or motel: Hotel/Motel Clerk
Oversees other employees at a hotel or motel: Hotel/Motel Supervisor or Manager
Cleans the interior of buildings: Housekeeper/Cleaning Worker
Helps guests at places of lodging with personal services: Concierge
Handles luggage for travelers: Porter/Bellhop
The answers to them are in each line behind the :'s.
Answer: 1.Hotel/Motel Clerk 2.Hotel/Motel Supervisor or Manager 3.Housekeeper/Cleaning Worker 4.Concierge 5.Porter/Bellhop
What is profession?
A successfully professionalized field of employment is referred to as a profession.
It can be characterized as a disciplined team of people, professionals, who uphold ethical standards, present themselves as, and are recognized by the public as possessing, special knowledge and skills in a widely acknowledged body of learning derived from research, education, and training at a high level, and who are prepared to apply this knowledge and exercise these skills in the interest of others.
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Most energy obtained from water is converted from _____.
groundwater
tidal generators
waterfalls
potential energy behind dams
Answer: potential energy behind dams
Explanation:
groundwater, tidal generators, and waterfalls don't produce enough kinetic energy.
PLS HELP I WILL GIVE BRAINLYEST!!!
Given the equation P2 = A3, what is the orbital period, in days, for the planet Venus? (Venus is located 0.72 AU from the sun?) (2 points)
Group of answer choices
72 days
225 days
500 days
5,375 days
Answer:
225
Explanation:
Answer:
I am doing the test now let me make sure then I tell you ok, just a second..
225 is correct
Explanation:
Please Help Me!!!!!!
Answer:
a.
Explanation:
Is this right? Please help me
Answer:
variable
Explanation:
meaning diffent
Find an everyday situation that involves density or buoyancy and explain it.
Answer:
Explanation:
Swimming. When you go swimming, your body floats but somewhat sinks as well because we weigh less when we're in the water. We are less dense.
Or taking a bath, the soap sinks to the bottom and the washcloth somewhat floats and sinks because of the air trapped in the middle. But the rest of the washcloth is sinking because it's absorbed the water which makes it denser.
Brainliest??
Which statement describes how the photoelectric effect causes an electric
current to form?
O A. Light acts as particles, causing electrons on the surface it strikes
to be destroyed.
B. Light acts as a wave, causing electrons to flow in different
directions within an atom.
C. Light acts as particles, knocking electrons off the surface it
strikes.
O D. Light acts as a wave, causing electrons to flow from one atom to
another.
Answer: C
Explanation: I just took the test
Answer:
C. Light acts as particles, knocking electrons off the surface it
strikes.
Explanation:
A 400-kg space probe has a weight of 3,560 N on one of the above planets. According to the table
above, on which planet is the space probe? Show your work.
Answer:
Venus
Explanation:
To know the correct answer to the question, we shall determine the weight of the space probe on each planet to see which will correspond to 3560 N.
This is illustrated below:
For Mercury:
Mass = 400 Kg
Gravitational force = 3.7 N/Kg
Weight =?
Weight = mass × gravitational force
Weight = 400 × 3.7
Weight = 1480 N
For Venus:
Mass = 400 Kg
Gravitational force = 8.9 N/Kg
Weight =?
Weight = mass × gravitational force
Weight = 400 × 8.9
Weight = 3560 N
For Earth:
Mass = 400 Kg
Gravitational force = 9.8 N/Kg
Weight =?
Weight = mass × gravitational force
Weight = 400 × 9.8
Weight = 3920 N
For Neptune:
Mass = 400 Kg
Gravitational force = 11 N/Kg
Weight =?
Weight = mass × gravitational force
Weight = 400 × 11
Weight = 4400 N
For Jupiter:
Mass = 400 Kg
Gravitational force = 23.1 N/Kg
Weight =?
Weight = mass × gravitational force
Weight = 400 × 23.1
Weight = 9240 N
SUMMARY:
Planet >>>>>> Weight
Mercury >>>> 1480 N
Venus >>>>>> 3560 N
Earth >>>>>>> 3920 N
Neptune >>>> 4400 N
Jupiter >>>>>> 9240 N
From the above calculations, we can see that the weight of the space probe (i.e 3560 N) correspond to the weight on venus (i.e 3560 N)
Please I need help with this question (see image).
Show workings where necessary.
Answer:
I think the reason why ice is forming on the aluminium lumps and not the beaker, is because:
The beaker is already on the same temperature as the mixture inside it: as a result, there is no heat transfer.
on the other hand, the Aluminium Lumps is at a way lower temperature than the mixture and as a result, there is heat transfer from the water around the lumps to the aluminium Lumps itself.
turning the water into ice.
Heat is lost from the water, and gained on the aluminium.
Since the water was turned to ice.
we can say that the final temperature of the heat transfer process is 0°C.
Notice that we'll be making use of the latent heat of fusion for ice. since water is being converted to ice at 0°C.( workout is in above attachment)
the measure of energy that a wave carries is known as what
Amplitude...........
Answer:
Amplitude
Explanation:
we took a test today and this same question showed up and it said it was Anplitude
A light bulb has a resistance of 800 ohms. The current going through the bulb is 0.15 A. What is the potential difference across the light bulb?
A) 12 V
B) 5333 V
C) 120 V
D) 53.33 V
Answer:
120 V
Explanation:
v=i*r
v=0.15*800
v=120
a student compared two samples of matter he recorded the results in this chart which property do the two samples have in common
Answer:
私は知らない
Explanation:
why is it better system for units?
Answer:
Because it's so much simpler and easier to use. The metric system is an improvement over the English system in three major points: One unit of measurement for each physical quantity. No matter from which other quantities of the SI system derived, yields always the same unit.
Explanation:
A person is observing the oscillations of a wave. If the wave source begins to move away from the person, what will the person notice?
Answer:
Explanation:
C
Fill in the blanks to complete the sentence.
Light acts like a
when it bounces off surfaces, and acts like a
when it bends around objects.
The answer is:
Fill in the blanks to complete the sentence.
Light acts like a PARTICAL when it bounces off surfaces,
and acts like a WAVE when it bends around objects.
I hope this helps you :>
Answer:
Particle and wave
Explanation:
Tonya is riding a motorcycle that goes from 30 m/s to 75 m/s in 5s. She is heading south to Florida. What is her acceleration?