Answer:
Weight of object = Wv = Mg
Weight along ramp = Wr = Wv sin θ
Mechanical advantage = Wv / Wr = 1 / sin θ = 1/.15 = 6.7
Sin θ = H / L = .75 / 5 = .15 θ = 8.6 deg
Note: M.A. = 5 / .75 = 6.7 because one has to move a weight 5 meters to raise it by .75 m
Which statement correctly describes the relationship between wavelength, frequency, and energy?
A) Waves with a short wavelength have a high frequency and low energy.
B) Waves with a short wavelength have a high frequency and high energy.
C) Waves with a short wavelength have a low frequency and low energy.
D) Waves with a short wavelength have a low frequency and high energy.
Answer:
A.
Explanation:
maybe because the frequency of a wave increases due high wave and low energy. Hope this helps :3
You can take your heart rate using:
Question 4 options:
Radial Pulse Point
Carotid Point
None of the above
A and B
Answer:
A I think
Explanation:
at the wrist lightly press the index and the middle fingers of one hand on the opposite wrist just below the base of the thumb at the neck lightly press the side of the neck just below the jawbone count the number of beats in 15 seconds and multiply by four and that's your heart rate
You can take your heart rate using both the Radial Pulse Point and the Carotid Point. The correct answer is "A and B."
1. Radial Pulse Point: The radial pulse is taken by placing two fingers (usually the index and middle fingers) on the radial artery, which is located on the wrist, on the same side as the thumb. By feeling the pulsations, you can count the number of beats per minute, which gives you the heart rate.
2. Carotid Point: The carotid pulse is taken by placing two fingers (usually the index and middle fingers) on the carotid artery, which is located on either side of the neck, just below the jawline. Again, you can count the number of beats per minute to determine the heart rate.
Both methods are commonly used to measure heart rate, and they are easy to access and provide accurate results. However, it's essential to be gentle when taking a pulse to avoid putting excessive pressure on the arteries.
To know more about heart rate:
https://brainly.com/question/1155838
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UUUURGENT I NEED HELP I WILL GIVE BRAINLEST
Answer:
Due to force of gravity and the overlying weight of the skater
Explanation:
Give me brainliest and a like.Good luck
which statement is true about light?
A. Light bends around the corners of a medium.
b. light travels in a straight line but distorts in mediums.
C. light never travels in a straight line
Answer:
b. light travels in a straight line but distorts in mediums.
The fishing pole shown here is an example of a lever. Which statement describes the fishing pole's mechanical advantage?
Answer:
Explanation:
The person will exert a much larger force to take a fish out of the water than the fish itself weighs. The advantage of the fishing pole, however, is that it moves the fish a large distance, from the water to the boat or the shore.
Why is the angle of refraction not the same as the angle of incidence?
Answer: Angle of Incidence is not equal to refraction
Explanation: It’s not because a refracted ray depends on how dense is the substance.
Horseshoe crabs, or Limulus polyphemus, are very common along the east coast of the US. Fossils of horseshoe crabs have revealed that they have changed very little in the past 300 million years. Which statement best explains why this is the case?
A.Horseshoe crabs have a low reproductive rate.
B.Horseshoe crabs need to change only if humans are present in their environment.
C.The horseshoe crab is well adapted to its environment. and its environment has not changed much in the last 300 million years.
D.Horseshoe crabs have a high mutation rate.
How does a low pressure system determine the weather in an area?
It causes the cool air to rise and warm up.
It decreases the chance of precipitation in the area.
It decreases the moisture in the air.
It forms clouds as the warm air rises and cools down.
Answer:
In a low-pressure zone, wind is circulated inwards and upwards rapidly. As a result, air rises and cools; clouds and precipitate are formed. Low air pressure produces unstable weather conditions like rain or storms.
Explanation:
Answer:
D)
Explanation:
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calculate-
On this model 40 AU = 1 meter.
A light year, the distance light travels in 1 year, is 63,240 AU
The nearest star is *Proxima Centauri is 4.2 light years.
i think im supposed to find the distance per meter or something
[tex]1 \times 12 = 63240 \sqrt{4.2} [/tex]
1x4<3=12
Which type of wave can only be transmitted through matter?
A) infrared
B) ultraviolet
C) sound
D) light
PLEASE HELP ITS DUE TODAY ILL POST THE OTHER HALF
Please help
Please help
Please help
Answer:
wait for a miracle
Explanation:
ANSWER MAY VARY:)
help thank you. will mark as brainliest if correct and no link to some unknown websites
Answer: 4
Explanation:
The answer to this question is number 4 as part 4 is where the roller coaster is slowing down. This means that it is gaining stored potential energy and in turn, losing kinetic energy. Furthermore, an object gains potential energy as it goes higher, usually.
what is visible light?
[MA]:
Wavelengths in the electromagnetic spectrum too short or too long to be detected by the human eye; e.g., ultraviolet and infrared light.
Writer's note: I just noticed there are answers below the question, sorry!
[xArtsy]
Which type of surface is best for absorbing sound waves?
A) glass
B) foam
C) plastic
D) rock
Which carries more energy-------Ultraviolet waves or infrared waves? Explain.
Answer:
Ultraviolet Waves
Explanation:
UV waves can carry energy at a more rapid rate than infrared waves.
Answer: Ultraviolet has more energy. Ultraviolet radiation has shorter waves than blue or violet light, and thus oscillates more rapidly and carries more energy per photon than visible light does.
Hope this helps!
What happens to the density of a material if you have a larger piece of it?(1 point)
The density will be smaller because the mass remains the same as the volume increases.
The density will be smaller because the mass remains the same as the volume increases.
The density will be greater because the mass increases but the volume remains the same.
The density will be greater because the mass increases but the volume remains the same.
The density will remain the same because mass and volume will both increase in the same way.
The density will remain the same because mass and volume will both increase in the same way.
The density will remain the same because mass and volume will remain the same.
The density will remain the same because mass and volume will remain the same.
Answer:
The density is more?
Explanation:
hopefully its right
Why do most girls not like it when we call them cute? I have been woundering this for so long now.
Answer:
Explanation:
Maybe because people call babies cute and youd bassically be saying theyre babies
this question is hard and i don't really understand it. can i have help. thank you
Answer:
Alpha particles carry a positive charge, beta particles carry a negative charge, and gamma rays are neutral. An alpha particle is made up of two protons and two neutrons bound together. Beta particles are high energy electrons. Gamma rays are waves of electromagnetic energy, or photons
Match the type of electromagnetic wave to the description on the right.
Low energy, ow frequency, long wavelength waves on the electromagnetic spectrum.
Small part of the electromagnetic spectrum that humans perceive with their eyes.
High energy, high frequency, short wavelength waves on the electromagnetic spectrum.
Choises:
Visible light waves
Gamma radiation
radio waves
short essay Question
Answer:
In wind turbines, the blades rotate due to the wind.
Explanation:
In wind turbines, the blades rotate due to the wind. While the blade rotates the generator connected to it also rotates. Thus the kinetic energy from the wind initiates the electric generator which in turn produces the electricity.
Thus the kinetic energy of the wind is converted to electricity.
Hope this helps!
Have a Wonderful Friday!
-Good Luck on your Homework- :)
What evidence suggests that the ancestors of whales once walked on land?
A.Whales breathe through lungs.
B.Scientists have found fossils of whale-like creature that had legs.
C. Whales have similar DNA to elephants.
D.Whales perform walking motions as they swim.
MHR (Maximum Heart Rate) is calculated by: 220 minus your age
Question 5 options:
True
False
Which option is an example of reflection?
A) an echo of sound in a canyon
B) the sound of a siren changing
C) a rock making ripples in water
D) light shining through a window
Answer:
A
Explanation:
sound waves hit the canyon walls, then bounce back towards you. That's why you hear an echo
can someone help me with this graphic organizer
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Answer:
There are many ways to explore careers firsthand but here are a few examples:
Explanation:
You could...
Job shadowGet an internshipFind a mentorVisit workplaces Take classes within your job target VolunteerHope this helps!
Answerooo
Explanation:
You could do it...
Job shadowing
Obtain an internship
Look for a mentor.
Pay visits to workplaces
Take lessons that will help you acquire a job.
Volunteer
Don't take your heart rate with your thumb because the thumb has it's own pulse.
Question 6 options:
True
False
Answer:
True
Explanation:
Do not use your thumb, because it has a pulse that you may feel.
In one to two sentences, identify the purpose of the roots in a plant and how a disease that harms the roots of a flowering plant would affect the plant’s ability to survive.
HELP ASAP 50 POINTS AND MARKING BRAINLIEST!!!!!!!!!!!!!!!!!!!!!
The purpose of the roots in the plants is to absorb nutrients.
.
, .
.
What will happen to the amount of force of an object if the mass of an object increases?
Answer: If you were too push a heavy item down a ramp, it would go faster than a lighter object because the heavier the object, the stronger the gravitational force.
Explanation:
How would you explain the differences between graphing x > 4 and x ≥ 4 to a peer who missed this lesson?
Answer in complete sentences.
Explanation:
x>4 that is x is GREATER THAN 4 but not equal to but it's its the other one than it mean that x can be 4 or more nothing less
Answer:
x > 4 means that the value of { x } is greater than 4 while x ≥ 4 means that the value of { x } is greater or equal to 4.
Explanation:
Which characteristic can be inherited?
freckles on the skin
the ability to play piano
the length of hair in a human
the appetite of a puppy
