Answer:
-2.1 N
Explanation:
The force of friction on the toy is 2.10 N and it acts opposite to the direction of its motion.
What is friction?A force called friction prevents one solid object from rolling or sliding over another. Although frictional forces, such the traction required to walk without slipping, may be advantageous, they can provide a significant amount of resistance to motion.
Given parameters:
mass of the toy dog: M = 0.398 kg.
Applied force: F = 4.63 N.
Angle of application of force: θ = 63.0°
Hence, horizontal component of applied force = F cosθ
= 4.63 × cos63.0° N
= 2.10 N.
As the child drags a 0.398 kg toy dog across flat ground at constant speed, this component of applied force is nullified by force of friction.
Hence, the force of friction on the toy is 2.10 N and it acts opposite to the direction of its motion.
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Is an 80 dB sound twice as loud as a 40 dB sound? Explain.
Answer:
Yes.
Explanation:
As decibel is a universal unit, 40Db*2=80Db.
12456787980-1234567890
Answer:11222220090
Explanation:
Answer:
11222220090
Explanation:
Which interaction can result in a wave that has a larger or a smaller amplitude than the original waves?
Answer:
Physical Science - Chapter 20 - The Energy of Waves
A B
interference a wave interaction that occurs when two or more waves overlap
constructive interference interference that results in a wave that has a greater amplitude than that of the individual wave
diffraction the bending of waves around a barrier or through an openin
Explanation:
Which best describes what occurs when an object takes in a wave as the wave hits it?
A: transmission
B: absorption
C: reflection
D: refraction
Answer:
For Edge users, the answer is absorption.Explanation:
A dog whistle is designed to produce a sound with a frequency beyond that which can be heard by humans (between 20,000 Hz and 27,000 Hz). If a particular whistle produces a sound with a frequency of 25,000 Hz, what is the sound’s speed? Assume the wavelength of this sound wave in air is 0.013m. *
4 points
325 m/s
250 m/s
113 m/s
467 m/s
Answer:
325 m/s
Explanation:
The velocity of waves is given as the product of wavelength and frequency of the waves. This is expressed as s=fw where s is the speed, f is frequency and w is wavelength.
Sometimes, when provided with period, you get frequency as the reciprocal of period.
In this case, since the wavelength is given as 0.013 m and frequency as 25000 then we substitute them into the equation of speed as
S=25000*0.013=325 m/s
Therefore, the speed is 325 m/s
The speed of the sound having a frequency of 25000 Hz and a wavelength of 0.013 m is 325 m/s
From the question given above, the following data were obtained:
Frequency = 25000 Hz
Wavelength = 0.013 m
Velocity = ?The velocity, frequency and wavelength of a wave are related by the following equation:Velocity = frequency × wavelengthWith the above equation, we can obtain the speed of the sound as follow:Frequency = 25000 Hz
Wavelength = 0.013 m
Velocity = ?Velocity = frequency × wavelength
Velocity = 25000 × 0.013
Velocity = 325 m/sTherefore, the speed of the sound is 325 m/s
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Which of these is a substance or compound that kills or inhibits bacteria?
A.
an antibiotic
B.
a germ
C.
a microorganism
D.
a vaccine
Answer:
an antibiotic
Explanation:
Final answer:
An A. antibiotic is a substance or compound that kills or inhibits bacteria, and it can be a natural product of microorganisms or synthetically produced in a laboratory.
Explanation:
The substance or compound that kills or inhibits bacteria is known as an antibiotic. Antibiotics are either metabolic products produced by one microorganism to inhibit or kill other microorganisms or can be synthesized chemically in a laboratory. The effectiveness of an antibiotic may vary; some have a broad spectrum of activity against many different kinds of bacteria, while others have a narrow spectrum, targeting specific types of bacteria.
An antibiotic operates by interfering with crucial biological processes of bacteria, often by inhibiting enzymes necessary for their growth, leading to their destruction or prevention of their replication.
Jamie has a mass of 35kg what is her weight on earth in newtons
What happens to the gravitational force between two objects as the bodies become farther apart from each other?
A.
The gravitational force decreases
B.
The gravitational force stays the same
C.
The gravitational force increases
D.
The gravitational force begins to repel the objects.
Answer:
b ( gravitational force stays the same )
Explanation:
because I learned it in school.
Answer: A. The gravitational force decreases
Explanation: I got it correct on Study Island :)
____ 1. A mineral is inorganic, which means that it contains
a. compounds.
b. materials made by humans.
c. parts of living things.
d. no materials that were once part of living things.
Final answer:
A mineral is inorganic, which means that it contains 'd. no materials that were once part of living things', emphasizing that minerals do not include organic material.
Explanation:
A mineral is defined as a naturally occurring, inorganic solid with a unique chemical and crystalline structure. In this context, the term inorganic means that the mineral does not contain materials that were once part of living things. Therefore, inorganic pertains to material not produced by life processes.
Minerals are typically comprised of a combination of metals and nonmetals, such as calcium carbonate (CaCO3), which includes the metal calcium (Ca) and the nonmetals carbon (C) and oxygen (O). Given the definition of a mineral, the correct answer to the question 'A mineral is inorganic, which means that it contains would be that no materials that were once part of living things.
Shayla was late for school. She ran the last half mile in 4 minutes. What was her average speed in miles per hour?
Answer:
7.5 miles per hour
Explanation:
Plzzz Help
According to the Doppler effect, what appears to happen when a light source moves closer to an observer?
The waves stretch and frequency appears to increase.
The waves stretch and frequency appears to decrease.
The electromagnetic waves appear more blue in color.
The electromagnetic waves appear more red in color.
Answer:
The electromagnetic waves appear more blue in color.
Explanation:
Doppler's Effect: When a source moves with respect to the observer the frequency of the wave emitted from the source changes. If the source moves away from the observer, the frequency decreases and wavelength increases and vice versa.
Here the light source is moving towards the observer so the frequency will increase and wavelength will decrease. Thus the spectrum will shift towards the blue part. This is known as blue shift. The light wave will appear blue in color.
Answer:
c. is the correct answer
.
Which of the following statements describes an actual orbit?
O
A. The Moon is a satellite of Earth.
O
B. The Sun is a satellite of Earth.
O
C. Earth is a satellite of the planet Jupiter.
O
D. The planet Jupiter is a satellite of Earth.
The Moon is a satellite of Earth. This statement describes an actual orbit. Hence, option (A) is correct.
What is orbit?An orbit is the curved path taken by an object in celestial mechanics, such as the path taken by a planet around a star, a natural satellite around a planet, or an artificial satellite around an object or location in space, such as a planet, moon, asteroid, or Lagrange point.
Typically, the term "orbit" refers to a trajectory that repeats itself on a regular basis, though it can also apply to a non-repeating trajectory. According to Kepler's rules of planetary motion, planets and satellites roughly follow elliptic orbits, with the center of mass orbiting at a focal point of the ellipse.
Hence, the Moon is a satellite of Earth. This statement describes an actual orbit.
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What two equations can be used to determine the speed of a wave
Answer:
Wave speed is related to wavelength and wave frequency by the equation: Speed = Wavelength x Frequency. This equation can be used to calculate wave speed when wavelength and frequency are known.
Explanation:
To assist with a class demonstration, a student (whose mass is 60 kg) filled a water balloon with 2 kg of water. He then climbed to the second floor (10 metres) of the school and held the balloon out of a window. How much work did the student do?
Answer:
W = 6082.2 [J]
Explanation:
To solve such problems we must use the definition of work. Which tells us that work is equal to the product of force by a distance.
The force will be equal to the product of the mass combined by the gravitational force.
F = m * g
where:
m = combined mass = 60 + 2 = 62 [kg]
g = gravity = 9.81 [m/s^2]
F = 62 * 9.81 = 608.22 [N]
And the work done.
W = F * d
W = 608.22 * 10
W = 6082.2 [J] units in Joules
The work done by the student in lifting both himself and the water balloon to the second floor is calculated to be 6076 Joules, based on the combined mass and the height of the second floor.
Explanation:The student has done work in carrying the water balloon up to the second floor. To calculate the work done, we use the formula work = force x displacement. Here, the force is equal to the weight of the object, which is the mass multiplied by the acceleration due to gravity (g=9.8 m/s²). Since both the student and the water balloon are being lifted, we must account for the total mass.
The combined mass of the student and water balloon is 60 kg + 2 kg = 62 kg. Thus, the weight is 62 kg x 9.8 m/s² = 607.6 N. The work done to lift them 10 meters high is 607.6 N x 10 m = 6076 Joules.
This assumes that the work done only accounts for the potential energy gained by lifting the water balloon and the student, with no other forces or work, such as horizontal movement or air resistance.
Cross country skier moves 32 m west word than 54 m east word and finally 68 m westward what is the distance moved?
Answer:
154m
Explanation:
Distance moved
= 32m + 54m + 68m
= 154m
what does adicate mean? Use it in a sentence
Answer:
I think adicate means there's a lot of diffrent definition ill jus tell you the social studies one it means "renounce one throne" i think
Explanation:
On the surface of Earth, the force of gravity acting on one kilogram is: *
A. 2.2 pounds
B 9.8 pounds
C 2.2 Newtons
D 9.8 Newtons
Your answer would be:
Option (B) : 2.2 Pounds
Anyways stan LOONA
Final answer:
The force of gravity on the surface of Earth acting on one kilogram is 9.8 Newtons, which is the result of the standard acceleration due to gravity of 9.80 m/s².
Explanation:
On the surface of Earth, the force of gravity acting on one kilogram is 9.8 Newtons. This is because the standard acceleration due to gravity is 9.80 m/s² on Earth.
Therefore, the weight of a 1.0 kg object on Earth is calculated using the formula w = mg, which equals (1.0 kg)(9.80 m/s²) = 9.8 N.
It is important to note that a pound is a unit of force equal to 4.44822 Newtons, and it is the force with which a 0.4536 kg mass is attracted to Earth.
Thus, 9.8 N equals approximately 2.2 pounds. However, 9.8 Newtons is the correct force measurement for gravity acting on one kilogram at the Earth's surface.
Which one of the following is the pigment found in redheads?
a) Keratin
b) Melanin
c) Pheomelanin
d) Cortex
Pheomelanin is the pigment found in redheads. The correct option is C.
Pheomelanin is the pigment found in redheads. It is a cysteine-containing red polymer responsible for red hair and other pigmentation.
Sound is what type of wave (Check all that applies)
Transverse
Longitudinal
Electromagnetic
Mechanical
Answer:
It's a longitudinal and mechanical wave. The the sound is transported parallel to the direction that the sound wave moves and require a medium to travel.
Explanation:
Answer:
a ,b ,e sorry if I'm wrong
Explanation:
have a great day peep's :]
Could someone please fill out this document and give it back to me. I'm willing to give 100 points but all answers need to be correct and show really good working out. I really need to pass this assessment or else I will fail physics.
Hi friend! I'm really sorry, but I was only able to complete the first 2 pages. The whole thing was too big, and I have a curfew (bedtime). Also, I'm only in 9th grade, and I am pretty smart for my age, so I tried to figure everything out, but it was still too confusing for me. Honestly, if you just search the formulas/equations for work, power, volts, watts, joules, etc, it will be easier for you. I have included the doc with my answers below, but the rest of it is blank. Also, I recommend double checking my answers, just to make sure that they are not wrong.
I hope this helps!
- sincerelynini
Which power source uses the earth’s internal heat
Answer: Geothermal Energy
Explanation:
Which is used all over the world for cooking and heating things which was from the internal heat from the earth from the earth's crust!
Performing Metric Unit Conversions
Try
Which is equal to 5 meters?
50 centimeters
500 decimeters
5,000 millimeters
Answer:
5000 millimeters
Explanation:
1 meter=100 centimeters
50 centimeter=0.5 meters❌
1 meter = 10 decimeters
500 decimeters = 50 meters❌
1 meter =1000 milimeters
5000 milimeters = 5 meters✔
Answer:
5000 millimeters
Explanation:
1 meter=100 centimeters
50 centimeter=0.5 meters❌
1 meter = 10 decimeters
500 decimeters = 50 meters❌
1 meter =1000 milimeters
5000 milimeters = 5 meters✔
An astronaut has a weight of 2000 kg elephant
Answer: The answer is 19,600 newtons.
Explanation:
An astronaut's weight varies based on the gravitational force of the celestial body, while their mass remains constant irrespective of location.
The typo regarding the astronaut's weight being equivalent to a 2000 kg elephant can be overlooked, and we can focus on the factual information about an astronaut's weight and mass. An astronaut's weight is the force with which gravity pulls on an object, and it is dependent on the gravitational pull of the celestial body where the measurement is being taken. For instance, the astronaut's weight on Earth is around 1200 N (newtons), but it drops significantly to about 200 N when on the Moon due to the Moon's weaker gravitational force, which is about 1/6th that of Earth's.
Moreover, an astronaut's mass remains constant regardless of location. This means that whether an astronaut is aboard a spaceship repairing it with a 10.0 kg wrench, standing on the edge of a space platform, or traveling to different planets, their mass will always be the same. Mass is a measure of the amount of matter in an object, and unlike weight, mass is not affected by gravity. Therefore, while the astronaut's mass is 80 kg on Earth, it will still be 80 kg on the Moon, Mars, or in the vacuum of space.
What is larger then a solar system but smaller then the universe
A. Comet
B. Galaxy
C. Moon
D. Star
Answer: B. Galaxy (happy to help)
Explanation:
Answer:
B. Galaxy
Explanation:
Different galaxies make up the universe and solar systems make galaxies.
is the process of introducing a non blood fluid into the blood
The process described involves the transfusion of non-blood fluids into the blood, such as saline solution or blood substitutes, particularly in emergency situations where typical blood transfusions are not feasible. The success of such interventions relies on a thorough understanding of fluid dynamics and ongoing medical research to improve safety and effectiveness. Xenotransplantation is also notable for its potential to address organ transplant shortages.
Explanation:Introduction of Non-Blood Fluids into the Bloodstream
The process of introducing a non-blood fluid into the blood is known as transfusion or infusion when it involves substances such as saline solution, nutrition, medications, or blood substitutes. Historically, this was accomplished through techniques like those developed by Blundell using gravity or syringe-based systems to introduce donor blood into recipients. In modern medicine, the intravenous administration of a saline solution is common in emergency situations, such as multiple-vehicle accidents or military engagements, where normal blood plasma needs to be replaced quickly to prevent shock.
Research in the field of medicine continuously seeks to improve the effectiveness and safety of blood transfusions and substitutes. For example, during acute hemorrhage when typical blood transfusions are not an option, medical personnel might use artificial blood products that use hemoglobin-based or perfluorocarbon-based oxygen carriers to mimic the oxygen-carrying function of red blood cells (RBCs). This is important in environments where there's a concern for blood type incompatibility or a lack of available blood supplies.
In the broader scope of fluid dynamics in biology, it's essential to understand how these processes like osmosis, dialysis, and diffusion affect the circulation of blood and the cleansing of blood by the kidneys, as well as in medical applications such as kidney dialysis machines. Furthermore, xenotransplantation represents an area of medical research that explores the infusion of human patients with cells or tissues that have come into contact with animal cells, presenting a potential frontier for addressing organ transplant shortages.
The volume of a fixed mass of gas is directly proportional to its
temperature if the pressure is kept constant.*
a. Boyle's law
b. Charles's law
c. gay-lucssac's law
Answer: Charles's law
Explanation:
Charles's law is one of the gas laws, and it explains the effect of temperature changes on the volume of a given mass of gas at a constant pressure. Usually, the volume of a gas decreases as the temperature decreases and increases as the temperature also increases.
Mathematically, Charles's law can be expressed as:
V ∝ T
V = kT or (V/T) = k
where v is volume, T is temperature in Kelvin, and a k is a constant.
Amanda is holding a compass and notices that the north pole of the compass points towards the north pole of Earth. She is confused because she knows from her science classes that the north poles of two magnets will repel each
other. How can she explain this phenomenon?
The geographic north pole of Earth is actually near Earth's magnetic south pole
The north pole of the compass was probably pushed in the wrong direction by a nearby magnet
Earth's magnetic poles may have reversed positions while Amanda was observing the compass
Earth's poles are not strong enough to attract any handheld magnets, so it was probably a coincidence that the compass
pointed towards the north pole
Answer: The geographic North Pole of the Earth is actually near the Earth’s magnetic South Pole.
Explanation:
Final answer:
Amanda's compass points north because the compass's north pole is attracted to Earth's magnetic south pole, which is near the geographic North Pole. The use of 'North magnetic pole' for this location is a misnomer and is the root of the confusion.
Explanation:
The confusion Amanda is experiencing is due to a common misunderstanding about the Earth's magnetic poles. The compass needle is attracted to the Earth's magnetic field, which behaves as though there were a huge bar magnet inside the Earth. However, the key to resolving this confusion is understanding that the Earth's geographic North Pole is actually close to the Earth's magnetic south pole. This is why the north pole of a compass needle points towards the geographic North Pole. It is attracted to the opposite, or south-seeking, pole of Earth’s internal magnet. Over the years, the term 'North magnetic pole' has become a misnomer and leads to the misconception that like poles are attracting, when in reality, it is the unlike poles that are attracting.
It's important to note that the alignments of Earth's magnetic field have changed over time and will continue to do so, which means that the current configuration of magnetic poles is not permanent.
True or False: Earth is larger than the moon, so there is more of a chance for it to block the sun from the moon than for the moon to block the sun from Earth. Therefore, we have a better chance of seeing a lunar eclipse than a solar eclipse.
The Doppler effect describes the change in the observed __________ of a wave when there is relative motion between the wave source and the observer. *
4 points
Amplitude
Interference
Wavelength
Frequency
Answer:
Frequency
Explanation:
The Doppler effect describes the change in the observed Frequency of a wave when there is relative motion between the wave source and the observer.
Explanation:
• Doppler described, How the color of the Starlight changed with the Movement of the star.
• Waves comes in variety of forms.
There are two common factors that used to describe all types of waves,
1. Wavelength, 2. Frequency.
• For waves that carries light, the frequency of it determines the color of the light it carries.
In relate the the first and last point of the above contexts,
We conclude that the Doppler effect describes the change in the observed frequency of a wave when there is relative motion between the wave source and the observer
Consider the following research question, “When light passes into a medium where it slows down, does it bend toward the normal or away from the normal?” Suppose a student gathers the following data using the “Bending Light” simulation. (You may want to follow what they did by using the simulation to reproduce these results yourself.) What conclusions and generalizations can you make from the data gathered above? Explain your reasoning and provide specific evidence, with sketches if necessary, to support your reasoning.
Light bends towards the normal when moving into a more optically dense medium (where it slows down), and bends away from the normal when moving into a less optically dense medium (where it speeds up). This concept is described by the Law of Refraction or Snell's Law.
Explanation:Understanding Refraction
When light travels from one medium to another, its speed changes due to the differing refractive indices of the media. This change in speed results in the bending of light, a phenomenon known as refraction. If light passes from a medium with a lower refractive index to one with a higher index (a more optically dense medium), the speed of light decreases, and the light ray bends toward the normal (an imaginary line perpendicular to the boundary surface). Conversely, when light passes from a medium with a higher refractive index to one with a lower index (a less optically dense medium), the speed of light increases, and the light ray bends away from the normal.
The Law of Refraction, or Snell's Law, quantitatively defines this relationship between the angle of incidence and the angle of refraction, considering the refractive indices of the two media involved.
An everyday analogy for this behavior is pushing a lawn mower from a footpath (less resistance and higher speed, similar to a less dense medium) onto grass (more resistance and slower speed, similar to a denser medium). When entering the grass, the wheels slow down, and the mower turns towards the normal direction; whereas, when going from grass to footpath, the wheels speed up, and the mower turns away from the normal direction. This analogy helps visualize the directional change of light when it goes from a fast medium to a slow one and vice versa.