true should be right if it is
True, More light is transmitted through a translucent material than through an opaque material.
Answer: A
Explanation
Depending on the ability to pass the light through the body, materials can be classified into transparent material, translucent material and opaque material.
Transparent materials are those that are able to pass most of the light hitting it. Examples are water, glass etc.
Translucent materials are able to pass some portion of light through them. Example - plastic.
Opaque materials are those in which light will not pass through. Majority of the light is reflected or absorbed. Example- wood.
A player uses a hockey stick to push a puck at a constant velocity across the ice. The weight of the puck is 170 N. The
coefficient of friction is 0.0600. With what force must the player push the puck so that his force just equals the frictional
force?
28.3 N
0.999 N
0.102 N
0.0104 N
Answer: The minimum force by which player should hit the puck to move it is 0.102 N.
Explanation:
Weight of the puck = 1.70 N
This weight of the puck is the force acting normal to the surface that is:
N = 1.70 N
The coefficient of friction =
Frictional force =
The minimum force by which player should hit the puck to move it is 0.102 N.
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Answer:
F=10.2N : Force with which the player must push the disc
Explanation:
Conceptual analysis
We apply Newton's first law because the speed is constant in horizontal direction (x):
∑Fx = 0 Formula (1)
We apply Newton's first law because the speed is zero in vertical direction (y):
∑Fy= 0 Formula (2)
∑F: algebraic sum of forces in Newton (N)
We calculate the friction force with the following formula:
Ff=f*N Formula (3)
Ff= friction force in Newtons (N)
f = coefficient of friction
N= Normal force in Newtons (N)
Known data:
Wp = 170 N : puck weight
f = 0.0600 :coefficient of friction
Problem development
We replace the data in formula (1) and (2), considering that the force is positive (+) if it goes in the direction of the movement and negative (-) if it opposes the movement:
∑Fy= 0
N-Wp=0
N= Wp=170 N
∑Fx =0
F - Ff=0 F :force with which the player must push the disc
F - 0.0600*170 =0
F=10.2N
for an object that is speeding up in the positive direction, what does the displacement vs. time graph look like?
Answer:
The speeding up is steady, it is a parabola (a=V*t+(at^2)/2), and give it's an equation in connection to time, at that point, it is conceivable to discover the separation recipe by utilizing more substantial amount mathematics(integrals).
Explanation:
Answer:
displacement vs time graph will look like a parabolic shaped graph
Explanation:
As we know that the displacement of an object is given by kinematics equation when object is moving with uniform acceleration
So we know that
[tex]d = v t + \frac{1}{2}at^2[/tex]
now here since velocity is increasing in positive X direction as well as the acceleration is also in same direction then the displacement vs time graph must be a straight line graph
so we will have
Which motions are the components of projectile motion?
Projectile motion contains both horizontal and vertical motion.
Answer:Contains both Horizontal and Vertical Motions
Explanation:
What makes a person a member of the power elite?
A person becomes a member of the power elite through influential positions in military, corporate, and political institutions, often facilitated by their education from prestigious universities and their wealth. These individuals exert control over critical decisions that affect the economy and policy-making. Their interwoven interests form a tight-knit group that maintains power and has the potential to challenge democratic values and create inequalities.
One becomes a member of the power elite by occupying dominant positions within the most powerful institutions of society, namely the military, corporate, and political sectors. Sociologist C. Wright Mills outlines this concept in his book The Power Elite, describing a small, interconnected group that wields significant influence and resources. These individuals tend to be highly educated, having often graduated from prestigious universities, and use their wealth and connections to control the nation's economy and secure key political positions that allow them to make decisions which benefit themselves or their interests.
According to Mills, the power elite influence or even directly control the decision-making processes of the government in such a way that they can shape policies to favor their positions. This is evident as the power elite often have overlapping roles in different sectors, such as corporate executives becoming political leaders or vice versa, creating a circulating elite that sustains its dominance. The dynamics among the power elite thus have profound implications not only for the United States but also for the global population, as their decisions can benevolently or adversely affect millions.
The influence of the power elite is also bolstered by their control over mass media, which serves as a means of propaganda to maintain their status and agenda. It's important to note, however, that members of this elite are also individuals driven by self-interest, which is a natural human trait. The concern arises when their concentrated political and economic power challenges the principles of democracy and leads to significant socioeconomic inequalities.
The Power Elite theory, as described by sociologist C. Wright Mills, refers to a small group of wealthy and influential individuals who hold dominant positions in society, consisting of government, big business, and the military.
This elite group makes decisions that benefit their own interests rather than those of the general population, often controlling economic and political aspects to maintain their power and influence.
Members of the power elite are typically highly educated, have political connections, and use their positions to influence policies and resource allocation to uphold their dominance within society.
1. A 70 kg skier moving at 5 m/sec down a slope. What is the skier's momentum?
A. 35 (kg m)/sec
B. 350 (kg m)/sec
C. 75 (kg m)/sec
D. 755 (kg m)/sec
B. 350 kg m/s. A skier of 70kg at 5m/s down a slope will have a momentum of 350kg m/s.
The linear momentum or momentum is represented by the letter p and is defined as the product of the mass of a body by its velocity, that is:
p = m · v
Therefore, when a body is in motion it has a non-zero moment. If it is at rest, its moment is zero. In the International System, it is measured in Kg · m / s.
A 70 kg skier moving at 5m/s down a slope will have a momentum:
p = (70kg)(5m/s) = 350kg m/s
Which of the following describe an electrical motor? Check all that apply
() Changes electrical energy to mechanical energy.
() Can be powered by a hand crank.
() Uses the interaction between a spinning coil of wire and magnet.
() Is found in many appliances with moving parts like, a vacuum cleaner or a blender.
Don't answer unless you know the answer, please.
An electric motor converts electrical energy into mechanical energy using magnetic fields and current-carrying conductors, is used in appliances with moving parts, and is not powered by a hand crank.
An electric motor is a device that is designed to convert electrical energy into mechanical energy option A. This transformation occurs through the interaction of magnetic fields and current-carrying conductors. The basic operation of an electric motor involves loops of wire within a magnetic field. When an electric current passes through these loops, a torque is exerted on them, which in turn rotates a shaft connected to the motor. Through this process, the electrical energy used to create the current is converted into the mechanical work needed to turn the shaft.
Electric motors are widely used in various applications such as industrial machinery, household appliances like vacuum cleaners or blenders, and many other devices that require moving parts. These motors are based on the principles of magnetic force exerted on the wire loops. However, they are not powered by a hand crank; that is a feature associated with generators, which convert mechanical energy into electrical energy.
An idea, event, or object can be represented by a ____ to help people better understand it.
this should be it hope it helps
The representative model can be used to demonstrate the object or event or an idea to the people making them understand better.
Explanation:
Model representation is the best way to make people understand the idea or the event as verbal listening do not target the sense in much deeper way as the visual effect do.
The people will grasp of the model very easily as they could see it and they are not required to imagine. While imagining the event or the idea, half of the senses are involved in it and let the individual understand less.
Use the drop-down menus to answer each question.
Which line represents the movement of a cart with a constant acceleration?
A
Which line represents the movement of a cart with a constant velocity?
C
Which lines represents a cart with no velocity or acceleration?
B
Answer:
Constant acceleration- A
Constant velocity- C
No velocity or acceleration- B
Explanation:
For body moving with a constant acceleration, the rate of change of displacement changes over time. This is proven by the increasing gradient of the curve (A) against time.
A body that is moving at constant velocity covers equal distances over equal periods of time, thus the straight line with a constant gradient C.
A stationary body covers no displacement as time elapses. thus the flat line with zero gradient.
Answer:
A
C
B
Explanation:
correct on edge :)
What happens to light waves from a star as the star moves away from Earth?
The astronomer Edwin Powell Hubble observed several celestial bodies, and when obtaining the spectra of distant galaxies he observed the spectral lines were displaced towards the red (red shift), whereas the nearby galaxies showed a spectrum displaced to the blue.
From there, Hubble deduced that the farther the galaxy is, the more redshifted it is in its spectrum. The same happens with the stars and this phenomenom is known as the Doppler effect.
This phenomenon refers to the change in a wave perceived frequency (or wavelength=color) when the emitter of the waves, and the receiver (or observer in the case of light) move relative to each other. For example, as a star moves away from the Earth, its espectrum turns towards the red.
Answer:
they shift towards red
Explanation:
A P E X
Velocity can best be described by which of the following statements?
O
A. The speed of gravity
O
B. How far you have traveled
O
C. Speed in a given direction.
O
D. Miles per second
SUBMIT
The velocity is the “measure of displacement over a given time” which can be best explained with the statement of “speed in a particular direction”.
Answer: Option C
Explanation:
The velocity is the measure of displacement over time whereas the speed is the measure of distance over time. Since displacement is the distance covered in a particular direction, velocity is the measure of speed in a given direction. Velocity is “vector quantity” and speed is scalar quantity.
Which sections of the heating curve illustrate this process?
Answer:
B followed by D
Explanation:
The heat energy absorbed at B goes into potential energy that breaks the inter-molecular bonds and thus the constant temperature. Once the molecules have gained enough energy they escape the closely bonded structure and thus are free to move in random directions due to high kinetic energy. At this point (part D) an increase in heat energy leads to an increase in the kinetic energy leading to an increase in the temperature.
The heating curve represents five key phases: solid, melting (solid into liquid), liquid, vaporization (liquid to gas), and gas. Each flat line on the graph represents a phase change such as melting or vaporization; smooth inclines show the rise of temperature within each phase. For example, the initial incline and first flat line illustrate the heating and melting of a solid like ice into liquid.
Explanation:
The heating curve consists of five sections which represent different states of matter and changes of state. These include: solid, melting (solid to liquid), liquid, vaporization (liquid to gas), and gas. If we're talking about heating, these transitions happen in that order. For instance, the initial flat line on a heating curve illustrates the process of heating a solid until it reaches its melting point. The second flat line illustrates the process of actually melting the solid into a liquid, and the third line shows the heat of the liquid rising until it boils.
With water as an example, the solid section is ice being heated until it reaches 0 degrees Celsius, at which point we see the first flat line that indicates the ice melting. Once all the ice is melted, we move to the liquid phase where the temperature again rises until it reaches 100 degrees Celsius, indicating boiling and the beginning of the next phase change. This is the liquid to gas transition, shown by the second flat line on the curve.
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When word is done on an object by an ———- force, there will be a change in the total mechanical energy of the object. If ———- forces do work total mechanical energy will be conserved.
A. Internal, external
B. External, internal
C. Internal, applied
D. None of the above
According to “Law of conservation of mechanical energy”, there would be change in total mechanical energy of the object, when INTERNAL forces is applied on object. If EXTERNAL forces are applied, when mechanical energy will be conserved.
Answer: Option A
Explanation:
When the object experiences an internal force, the mechanical energy of the closed system changes whereas when the object experiences an external force, the closed system do not have any change in the mechanical force, according to the law of conservation of mechanical energy.
Two slits are spaced 0.33mm apart. If the angle between the first dark fringe and the central maximum is 0.055º, what is the wavelength of a light falling on these two slits?
Answer:
[tex]6.33\cdot 10^{-7} m[/tex]
Explanation:
The condition for the first minimum (= first dark fringe) in the interference pattern produced by diffraction from a double slit is
[tex]d sin \theta = \frac{\lambda}{2}[/tex]
where
[tex]d=0.33 mm = 0.33\cdot 10^{-3}m[/tex] is the separation between the slits
[tex]\theta=0.055^{\circ}[/tex] is the angle of the first minimum
[tex]\lambda[/tex] is the wavelength
Solving the equation for the wavelength, we find
[tex]\lambda = 2 d sin \theta = 2(0.33\cdot 10^{-3} m)sin 0.055^{\circ}=6.33\cdot 10^{-7} m[/tex]
Stereotypes are widely held beliefs that people have certain traits because
Answer:
Stereotypes are widely held beliefs that people have certain traits because they belong to a particular group stereotypes are often in accurate and frequently portray the members of less powerful less controlling groups or negatively and members of more powerful more controlling groups.
2 Points
Which of the following objects exhibit two-dimensional motion?
Check all that apply.
A. An object that's thrown horizontally off a cliff and allowed to fall
O
B. An object thrown upward at an angle
O
c. An object dropped from rest
O
D. An object thrown vertically upward
SUBMIT
Answer:
A. An object that's thrown horizontally off a cliff and allowed to fall
B. An object thrown upward at an angle
Explanation:
An object exhibits a two-dimensional motion if it can be described by both x and y coordinate components.This means you can describe it using a vector with the horizontal and vertical components.For example,a graph of a body that moves with a constant velocity,the sum of the velocities in the x and y directions can describe this object's position.The same with kicking a ball.The ball will rise up at an angle, where you will have the horizontal component in the x-axis direction and the vertical component in the y-axis direction.
So for the case of this question, when an object is thrown horizontally, the horizontal component is initiated which will be represented by the x-axis vector.When it is allowed to fall down, the vertical component is initiated, in this case it will be a negative vector.An object thrown upward at an angle behaves like a ball kicked at an angle.
Which part of the table showing the relationship of the field of research to solid-state physics contains an error?
crystallography
electromagnetism
materials science
metallurgy
Answer: (A) Crystallography
Explanation: Edge 2021
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What type of image is formed by a refracting telescope?
an enlarged, upside-down virtual image
a reduced-size, right-side-up virtual image
a reduced-size, right-side-up real image
an enlarged, upside-down real image
Answer:
the last one
Explanation:
The type of image which is formed by the refracting telescope are magnified inverted and non-real image.
Answer: Option A
Explanation:
The refractive lens uses it lens as the objective to form an image. This type of telescope are used as spy glasses and astronomical telescopes.
The refracting telescope makes the magnified image which can be also be termed as the enlarged image. Image formed by the refracting telescope is the inverted image which can also be written as the upside down image.
The nature of image formed is non-real that is virtual image. The purpose of telescope is to see far distant object and thus needs to produce enlarged image.
Which of the following is a feature of the color of an object?
A.
It is a subjective experience, based on the frequencies of light waves the eye receives.
B.
It is a subjective experience, based on the amplitude of light waves the eye receives.
C.
It is a characteristic of the object, regardless of the light around it.
D.
It is the same as that of the light an object absorbs.
Answer:
It is a subjective experience, based on the amplitude of light waves the eye receives.
Explanation:
I would think so it might be this..
What does a weather balloon do? Check all that apply.
warns about severe weather
enables forecasts seven to 10 days in advance
measures conditions in the upper atmosphere
collects data that predicts changes in the atmosphere
uses mathematical equations to show what will happen if conditions change
Answer:
Answers are, A, B, C, and D
Answer:
its actually a,c & d :) on edg
A ramp is often used to raise an object. If 80 joules of energy are needed to lift an object to a platform but 100 joules are
used in rolling the object up the ramp, what percent of energy was wastec in the form of heat due to friction?
Answer:
20
Explanation:
Answer:
20 % of energy is wasted
Explanation:
If 100 joules of energy are used when 80 joules was needed, then 100 - 80 = 20 joules were wasted. Given that 100 joules are proportional to 100 % of energy used, then 20 joules is proportional to x %, therefore:
20 J/100 J = x%/100%
x = 20%
What is one of Kepler's laws of planetary motion?
The Kepler laws of planetary motion are:
1) The planets revolve around the Sun following elliptical orbits, in which the Sun occupies one of the two focii
2) A line segment connecting the Sun with the center of each planet sweeps out equal areas in equal intervals of time --> this means that the speed of the planet changes according to its distance from the Sun: the closer to the Sun, the faster the planet
3) The square of the orbital period of the planets is proportional to the cube of the semi-major axis of the orbit. In formula
[tex]\frac{T^2}{r^3} = const.[/tex]
and the constant in the equation has the same value for every planet orbiting around the Sun.
Kepler's first law of planetary motion states that every planet orbits the Sun in an elliptical shape, with the Sun at one of the focal points of the ellipse. This law helps to calculate planetary positions with increased precision within the Copernican system.
Explanation:One of Kepler's laws of planetary motion is his first law, which states that each planet moves around the Sun in an orbit that is an ellipse, with the Sun located at one focus of the ellipse. This concept emerged based on the careful analysis of precise data collected, revolving around the positions in the sky of all the known planets and the Moon. The elliptical orbits described in Kepler's first law is a fundamental rule which improved the calculation of planetary positions with great precision within the framework of the Copernican system.
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Choose all of the terms that are appropriate for a situation that produces
work.
A. The momentum is greater than the force.
O
B. An object maintains its state of motion.
O
c. A force acts
D. The object moves.
SUBMIT
Answer:
-The object moves
-A force acts
Explanation:
(apex)
A cold glass is left sitting outside on a hot day. Soon, water droplets form on the outside of the glass. Describe the events that must occur for the water droplets to form on the glass.
Answer:
Water vapor from the air cools and condenses into water.
Explanation:
.
More damage is done and more life is endangered in a head-on collision of two cars, each traveling at 30 mph, than in a
car crashing into a brick wall at 30 mph because:
The relative velocity of the head-on collision is the product of the two velocities.
The relative velocity of the collision of the wall is absorbed by the wall.
The relative velocities are opposite of each other and therefore have a net sum of zero.
The relative velocities of the head-on collision are the sum of the two velocities.
Answer:
More damage is done and more life is endangered in a head-on collision of two cars, each traveling at 30 mph, than in a car crashing into a brick wall at 30 mph because the relative velocities of the head-on collision are the sum of the two velocities.
Explanation:
Car crashing to a brick wall at 30 mph is less dangerous than two cars travelling in opposite direction at 30 mph each.
This is because, for one car, the other is at a relative speed of 30+30 = 60 mph.
In all trials, the magnitude of the final velocity for G1 + G2 was less than the magnitude of any initial velocity. As mass increased, what happened to the velocity?
The velocity decreased.
The velocity increased.
The velocity of G1 + G2 could not be measured.
The velocity was not affected by the mass increase.
Answer: The Velocity Decreased
Explanation: e2020 answer
The magnitude of the final velocity for G1 + G2 will be less than any initial velocity because ; The velocity decreased ( A )
when the mass of an object on motion is increased by the addition of additional weight on the object, the velocity of the object on motion will start to decrease ( i.e. deceleration )
Therefore the magnitude of the final velocity for G1 + G2 will be less than the magnitude of their initial velocities as they experience an increase in mass, respectively.
Hence we can conclude that The magnitude of the final velocity for G1 + G2 will be less than any initial velocity because ; The velocity decreased.
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if a plane crash on border between mexico and america where do they bury the survivors?
Answer: it depends on there orgin and where there records say they shall be buried. For example, if your records say that you want to be buried in this specific location is requried by law to be buried there
Hope this helps :D
how much heat is needed to raise the temperature of 6g of water by 15°C
Answer:
Explanation:
Firstly, we need the specific heat capacity of water which is typically around 4200J/kg (if the mass is in kg) or 4.2 J/g ( if mass is in g)
The formula for the heat energy needed is
E=mct
Where E is the heat energy, m is the mass of water, c is the specific heat capacity and t is the change in the temperature.
E= 6 x 4.2 x 15
= 378 J
Hope this helps!!!
Feel free to ask any follow up questions!
What are the theoretical properties of a gas at a temperature of 0 Kelvin?
Answer:
The molecules in the gas would be completely stationary
Explanation:
The temperature of a gas is proportional to the average kinetic energy of its molecules, according to the equation (valid for an ideal monoatomic gas):
[tex]E_k = \frac{3}{2}kT[/tex]
where
[tex]E_k[/tex] is the average kinetic energy of the molecules
k is the Boltzmann constant
T is the absolute temperature of the gas
For a gas at 0 Kelvin, T = 0: this means that the average kinetic energy of the molecules is also zero. But this means that the motion of the molecules has completely stopped, so the molecules are completely still.
A temperature of 20C is equal to what F
Answer:
20C is equal to 68 F.
Select the three natural sciences.
Answer:
biology, chemistry, and physics
Answer: Biology, chemistry and physics
Explanation: The natural sciences include;
physics; this is the study of physical quantity of matter such as length, time etc.
Chemistry; this is the study of the chemical composition of matter and other living and non living things. The chemical properties may include
Biology is the study of life. It is the Study of life existence.