Answer: Heterogeneous mixture - the parts are not uniformly mixed.
A mixture contains components having distinct chemical properties. There are two types of mixtures: homogeneous and heterogeneous. In a homogeneous mixture there is uniform distribution of components. we cannot distinguish one portion of the mixture from another. for example salt mixed in water. In heterogeneous mixture, the components are not uniformly mixed. hence, we are able to distinguish different parts of a mixture, like the mixture of iron, sand and salt given in this question.
What is the final speed of an object that starts from rest and accelerates uniformly at 4.0 meters per second2 over a distance of 8.0 meters? 1. 8.0 m/s 2. 16 m/s 3. 32 m/s 4. 64 m/s
Answer:
Explanation:8.0m/s
According to the work-energy theorem, the amount of work done can be determined using which formula?
Answer:
[tex]W=K_f -K_i = \frac{1}{2}mv_f^2 -\frac{1}{2}mv_i^2[/tex]
Explanation:
The work-energy theorem states that the amount of work done is equal to the variation of kinetic energy of the object, therefore:
[tex]W=K_f -K_i = \frac{1}{2}mv_f^2 -\frac{1}{2}mv_i^2[/tex]
Where:
m is the mass of the object
[tex]v_i[/tex] is the initial velocity of the object
[tex]v_f[/tex] is the final velocity of the object
We can determine the velocity of a wave when given the frequency and the (2 points) A amplitude. B equilibrium. C trough. D wavelength.
We can calculate the velocity (v) of a wave by multiplying frequency (f) by its wavelength (λ). This can be said quantitatively as:
v = f × λ
Hope this helps!
We can determine the velocity of a wave when given the frequency and wavelength is given.
What is frequency and wavelength of wave?A wave's frequency essentially indicates how frequently waves happen. In other words, frequency is the quantity of finished wave cycles in a given time interval or the quantity of waves passing a given place in a given time interval, such as per second.
High frequency waves are those that pass a certain place more frequently or that complete more cycles per second. Low-frequency waves travel farther and take longer to reach their destination.
Wavelength can be defined as the distance between two successive crests or troughs of a wave. It is measured in the direction of the wave.
We can determine the velocity of a wave when given the frequency and wavelength.
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Roger pushes a box on a 30° incline. If he applies a force of 60 newtons parallel to the incline and displaces the box 10 meters along the incline, how much work will he do on the box?
A graduated cylinder has a mass of 80 g when empty. when 20 ml of water is added, the graduated cylinder has a mass of 100 g. if a stone is added to the graduated cylinder, the water level rises to 45 ml and the total mass is now 156 g. what is the density of the stone
Answer:
[tex]\rho_{stone} = \frac{56 g}{25 mL} = 2.24 g/mL[/tex]
Explanation:
Mass of the cylinder = 80 g
water added in the cylinder = 20 mL
mass of water + cylinder = 100 g
mass of water added = 100 g - 80 g = 20 g
density of water = [tex]\frac{mass}{volume}[/tex]
[tex]\rho = \frac{20 g}{20 mL} = 1 gm/mL[/tex]
now when stone is put into the cylinder then the volume reached to 45 mL
so volume displaced by the stone = 45 mL - 20 mL
V = 25 mL
mass of stone = 156 g - 100 g = 56 g
now density of stone is
[tex]\rho_{stone} = \frac{mass}{volume}[/tex]
[tex]\rho_{stone} = \frac{56 g}{25 mL} = 2.24 g/mL[/tex]
Often what one expects to see influences what is perceived in the surrounding environment. Please select the best answer from the choices provided T F
This statement is in-doubtingly true
It is true that Often what one expects to see influences what is perceived in the surrounding environment.
What is person's surrounding environment?The environment can be defined as the sum of all living and non-living elements and their effects on human life.
Non-living or abiotic elements include water, land, sunlight, rocks, and air, while all living or biotic elements are animals, plants, forests, fisheries, and birds.
The noun surroundings can refer to the immediate environment, including all nearby objects, as well as the location itself and the circumstances or conditions in which you find yourself.
When someone constructs a house, the surroundings influence which direction it faces and how many windows it has.
What one expects to see frequently influences what one perceives in the surrounding environment.
Thus, the given statement is true.
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A tennis ball bounces on the floor three times, and each time it loses 23.0% of its energy due to heating. how high does it bounce after the third time, if we released it 4.0 m from the floor?
The tennis ball will bounce to a height of approximately 1.828 meters after the third bounce when it loses 23.0% of its energy with each bounce starting from a height of 4 meters.
If a tennis ball is released from a height of 4 meters and bounces on the floor three times, each time losing 23.0% of its energy due to heating, we can calculate its height after the third bounce. The initial potential energy (PE) of the ball when released is converted into kinetic energy as it falls and then back into potential energy as it bounces upward. After each bounce, the ball retains only 77% (100% - 23%) of its energy because of the energy lost to heat. Therefore, after the third bounce, the ball has
(0.77)³ or about 45.7% of its original energy.
Here is the calculation to find the height (h) after the third bounce:
[tex]PE{initial }[/tex]= mg[tex]h_{initial}[/tex] = mg[tex]h_{final}[/tex]
[tex]h_{final}[/tex] = (0.77)³ h_initial
[tex]h_{final}[/tex] = (0.77)³
(4.0 m) = 0.457
(4.0 m) = 1.828 m.
The tennis ball will bounce to a height of approximately 1.828 meters after the third bounce.
When a system of measurement is based on units of ten, it is called a ____system.
Answer:
It is called a metric system!
Explanation:
What is direct evidence? Another name? An example?
Direct evidences are obtained rom the investigation area itself or directly from a sample under study and not from previous records or surveys.
What is direct evidence?Direct evidence is a type of proof that frequently utilizes the form of witness testimony or eyewitness narratives. When a witness states that they witnessed an accused person conduct a crime, overheard someone else say a certain word or words, or saw a certain act occur, these are examples of direct evidence.
The truth of an assertion is supported directly by direct evidence, i.e., without an intermediary inference. A witness describes what they personally saw or heard, but they may also use any other sense, such as scent, touch, or pain.
Other evidences collected from surveys, or from previous records, hearing from indirect witness etc. are not take as direct evidences.
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Collaboration and communication are important in science because?
Final answer:
Collaboration and communication in science are key to disseminating research findings and advancing scientific knowledge. Through collaboration and peer review, scientific work is validated and can be further built upon. Effective communication also helps in securing funding and informing the public.
Explanation:
Collaboration and communication are crucial in science because they enable the dissemination of research findings and the advancement of scientific knowledge. Through collaboration, scientists can plan, conduct, and analyze research collectively, which enhances the quality and impact of their work. Effective communication is necessary for sharing results beyond the confines of conferences and meetings, achieving this through peer-reviewed publications. These publications undergo a process of peer review to ensure that the research is original, significant, logical, and thorough. This process also allows other scientists to reproduce the experiments and expand upon the findings, creating a foundation for further discovery and innovation.
Furthermore, effective communication skills are critical when interacting with funding agencies or the general public to convey the importance and relevance of scientific work. Without transparent communication and open collaboration, scientific progress would be stymied, and opportunities for new discoveries may be lost. Additionally, successful collaboration often relies on technology to bridge geographical distances, allowing for ongoing dialogue and exchange of ideas without the necessity of being in the same physical location.
The wavelength of a wave is the distance between
If two objects have the same volume but one has a greater mass, the one with greater mass ___
A. Has lower density
B. Has higher density
C. Will float
D. Will sink
In which situations is nuclear power most beneficial? Check all that apply.
1.if there is a high concentration of people
2.if there is a nearby supplies of fossil fuels
3.if there is an isolated location
4.if there are few other energy resources
5.if there are few people in scattered towns
Nuclear power is particularly beneficial in areas with high population concentrations and where there are few other energy resources. Due to uranium's high energy efficiency, the environmental impact is minimized, and it's a carbon-free power source, helping combat global warming. However, its benefits need to be weighed against potential safety and sustainability risks.
Explanation:In which situations is nuclear power most beneficial? Nuclear power is most advantageous in scenarios where there are few other energy resources and in high-concentration population centers. The benefits of nuclear energy over fossil fuels are numerous, particularly when it comes to the efficiency of uranium. This substance generates significantly more power per unit weight or volume than coal, meaning less material needs to be mined, thus reducing environmental impact. In addition, nuclear power does not emit carbon dioxide during operation, making it a strong contender for reducing global warming.
Contrary to the proximity of fossil fuel supplies, nuclear power does not rely on nearby sources of fossil fuels, making it beneficial for isolated locations where transportation of fossil fuels would be logistically challenging or expensive. Likewise, for areas with a high concentration of people, the scalability and high-energy yield of nuclear power can meet the substantial electricity demands more effectively. However, when it comes to regions with scattered populations such as few people in scattered towns, distributed generation technologies like solar and wind might be more suitable and cost-effective.
It is essential, however, to weigh these advantages against the sustainability and safety concerns associated with nuclear power. The production of dangerous waste that must be stored safely for thousands of years, the potential for nuclear proliferation, and the risk of accidental radiation leaks are crucial factors that need to be considered carefully by scientists, policy makers, and citizens alike.
Nuclear power is most beneficial in 1. if there is a high concentration of people, 3. if there is an isolated locations, and 4. if there are few other energy resources.
Nuclear power is beneficial in certain situations due to its capability to generate large amounts of energy without emitting air pollutants like fossil fuels. Here are the most suitable situations for nuclear power:
If there is a high concentration of people: In densely populated areas, the demand for reliable and substantial energy is much higher. Nuclear power plants can meet this demand efficiently.If there are few other energy resources: In locations with limited access to renewable energy resources (like solar or wind power), nuclear energy serves as a powerful alternative to meet energy needs.If there is an isolated location: Isolated areas might lack the infrastructure for other energy sources. Nuclear power can provide a consistent and powerful energy supply without requiring frequent fuel deliveries.Other situations, such as having nearby supplies of fossil fuels or having few people in scattered towns, might not derive as much benefit from nuclear energy due to the cost and scale of nuclear power plants.
In a bumper car arena, two cars of equal mass are heading straight toward each other. The orange one is traveling at a speed of 5 meters per second. The green one is traveling at a speed of 2 meters per second. Which of the forces most affects the motion of the bumper cars after they collide?
Answer: D.
Explanation: Orange, at 3 meters per second if you calculate the net force being applied to the system.
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What does the law of conservation of energy state?
The total amount of energy remains constant in an isolated system. It implies that energy can neither be created nor destroyed, but can be change from one form to another.
how Long will it take a plane flying north from Miami to reach New York City 1800 km away if the average velocity of the plane is 940 km/h
Three light bulbs are connected to a battery in a series circuit. How will the bulbs behave if the circuit is closed?
A)
The correct answer is All three bulbs will glow. Closing the circuit allows energy to flow through all three bulbs.
which of the following is a characteristic of a mixture
A truck moves 60 kilometers east from point A to point
b. At point B, it turns back west and stops 15 kilometers away from point
a. What are the total distance and total displacement of the truck? The total distance is 105 kilometers, and the total displacement is 15 kilometers east. The total distance is 105 kilometers, and the total displacement is 45 kilometers east. The total distance is 60 kilometers, and the total displacement is 60 kilometers east. The total distance is 60 kilometers, and the total displacement is 45 kilometers east. The total distance is 105 kilometers, and the total displacement is 75 kilometers east.
Answer:
Option A is the correct answer
Explanation:
Let i represent positive X axis ( east).
A truck moves 60 kilometers east from point A to point B
Displacement = 60 i km
Distance = 60 km
At point B, it turns back west and stops 15 kilometers away from point A
Displacement = -45 i km
Distance = 45 km
Total
Displacement =60 i - 45 i = 15 i km Towards east
Distance = 60+ 45 = 105 km
Option A is the correct answer
3x/y=6g/b solve for x
Explain why nuclear fusion takes place only in the center of stars
A satellite of mass 6000 kg orbits the earth and has a period of 5700 s. determine the radius of its circular orbit.
The radius of the satellite's circular orbit is approximately 11,350,000 meters or 11,350 kilometers.
Given,
Mass of satellite = 6000 kg
Revolution time = 5700s
To determine the radius of the circular orbit of a satellite orbiting the Earth, the following equation based on the laws of circular motion can be used:
[tex]r = (\frac{G \times M \times T^2}{4\pi^2})^{(1/3)}[/tex]
Where:
r is the radius of the orbit
G is the gravitational constant (approximately 6.67430 × 10⁻¹¹m³ kg⁻¹ s⁻²)
M is the mass of the Earth (approximately 5.972 × 10²⁴ kg)
T is the period of the orbit
Substituting these values into the equation:
[tex]r = (\frac{G \times M \times T^2}{4\pi^2})^{(1/3)}[/tex]
[tex]r = \frac{6.67430 \times 10^{-11} \times 5.972 \times 10^{24} \times (5700)^2}{(4\pi^2)^{(1/3)}}[/tex]
r = 1.135 × 10⁷ meters
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What causes a disturbance that results in a wave?
The correct explanation is that a wave is caused by a disturbance that transfers energy from one place to another without the transfer of matter.
A wave is a disturbance that travels through a medium or space, transporting energy from one location to another. The disturbance can be initiated by various sources.
For example, when a stone is dropped into a pond, the impact causes a splash and a series of ripples to move outward across the water's surface. These ripples are waves. Similarly, sound waves are caused by vibrations of objects, which create disturbances in the air, and seismic waves are generated by the sudden movement of rock within the Earth's crust.
In all cases, waves are characterized by their ability to transport energy without the physical transport of the medium's particles. The particles of the medium (such as water, air, or rock) oscillate about their equilibrium positions as the wave passes through, and this oscillation is what carries the wave's energy.
The energy of the wave can cause subsequent particles to oscillate, thus propagating the disturbance through the medium.
The nature of the wave (whether it is transverse, longitudinal, or a combination of both) depends on the direction of the particles' oscillations relative to the direction of energy transfer.
In summary, the cause of a wave is an initial disturbance that sets particles of a medium into motion, creating a pattern that moves through the medium, carrying energy with it.
This disturbance can be the result of various forces or events, such as mechanical vibrations, gravitational pulls, or nuclear reactions, and the specific characteristics of the wave will depend on the properties of the medium and the nature of the disturbance.
The density of an object is how much matter it contains.
a. True
b. False
Answer:
False
Explanation:
The density is mass divided by volume
a projectile leaves the ground with a velocity of 35 meters per second at an angle 32° what is the maximum height
Final answer:
The maximum height reached by the projectile is approximately 35.77 meters.
Explanation:
To find the maximum height of a projectile, we can use the equation h = (v₂sin²Θ)/2g, where h is the maximum height, v is the initial velocity, Θ is the launch angle, and g is the acceleration due to gravity. In this case, v = 35 m/s and Θ = 32°. We need to convert the launch angle to radians, so Θ = 32° * (π/180°) = 0.558 radians.
Plugging the values into the formula, we get h = (35₂sin²(0.558))/(2*9.8) = 35.77 meters. Therefore, the maximum height reached by the projectile is approximately 35.77 meters.
When released , what is the kinetic energy of the 1c charge of the preceding problem if it flies past its starting position?
John has a boat that will travel at the rate of 15 kph in still water. he can go upstream for 35 km in the same time it takes to go 140 km downstream. how fast is his boat traveling when he goes downstream? 22 kph 24 kph 26 kph
Answer:
24kph
Explanation:
John has a boat that will travel at the rate of 15 kph in still water. he can go upstream for 35 km in the same time it takes to go 140 km downstream, then it would go 24 kph downstream, therefore the correct answer is option B.
What is speed?The total distance covered by any object per unit of time is known as speed. It depends only on the magnitude of the moving object. The unit of speed is a meter / second.
As given in the problem John has a boat that will travel at the rate of 15 kph in still water. he can go upstream for 35 km in the same time it takes to go 140 km downstream.
Let us take the speed of the stream would be x kph.
35 / 15 -x = 140 / 15 + x
x = 9
The speed of the boat downstream = 15 + 9
= 24 kph
Thus, it would go 24 kph downstream, therefore the correct answer is option B.
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Star a is green, star b is yellow, and star c is red. which one of these is the hottest star?
It usually takes more force to start an object sliding than it does to keep an object sliding because static friction is usually _____greater _______________ than sliding friction.
A ball is at rest on the floor of a car moving at a constant velocity. What will happen to the ball if the car swerves suddenly to the left, and why will this happen?
The ball would move to the right under a thrust force.
What would happen to the ball?We know that in physics that an object would continue in its state of uniform motion or at a state of rest unless it has been acted upon by external forces that are acting on the object.
In this case, we have a ball that is at rest and then we have a car that is moving uniformly but is suddenly swerved to the left hand side. We know that the thrust that is produced by the car would act on the ball in the opposite direction.
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