A box of mass m is placed on an incline with angle of inclination θ. The box does not slide. The magnitude of the frictional force in this case is:A. μs mg sin θ.B. mg cos θ.C. mg sin θ.D. not given.

Answer:

V = 49.05 [m/s]

Explanation:

We can easily find the result using kinematics equations, first, we will find the distance traveled during the 5 seconds.

\(y =y_{o}+(v_{o}*t)+(\frac{1}{2}*g*t^{2} )\)

where:

Yo = initial position = 0

y = final position [m]

Vo = initial velocity = 0

t = time = 5 [s]

g = gravity aceleration = 9.81 [m/s^2]

The initial speed is zero, as the body drops without imparting an initial speed. Therefore:

y = 0 + (0*5) + (0.5*9.81*5^2)

y = 122.625[m]

Now using the following equation we can find the speed it reaches during the 5 seconds.

\(v_{f} ^{2}= v_{i} ^{2}+(2*g*y)\\v_{f}=\sqrt{2*9.81*122.625} \\v_{f}=49.05 [m/s]\)

The type of energy that does not describe potential energy being changed into kinetic energy is the energy that exists in the Compression of the spring.

Usually, in many energy sources, the potential energy is changed into kinetic energy but no such energy transmission takes place when a spring is compressed.

Potential energy is considered as the stored energy occupied by an object or system by virtue of its respective position or by the arrangement of parts. However, this energy is not affected by the environment existing outside of the system or subject including air or height. Potential energy is changed into kinetic energy is also not described in the compression of rubber foam.  

On the other hand, the term kinetic energy is termed as the energy of a particular object or particle of a system that is in motion. Contrary to several peculiarities of potential energy, the kinetic energy of a particular object is in relative position to other stationery as well as moving objects present in its own environment which is an immediate type. In general, the kinetic energy of an object will be of higher value if the object is placed at a distance of greater height.  

If we take the case of Potential energy, it is not all transferrable in nature and will depend on the height or the distance and also the mass of the object. On the other hand, Kinetic energy can be easily transferable from one moving object to another which includes the vibrational and rotational types of energy and it depends on the speed, velocity, and mass of the object.

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(A) The image you see of yourself in the shiny tablespoon is inverted.

(B) The image you see of yourself in the shiny tablespoon is reduced.

(C) The image you see of yourself in the shiny tablespoon is virtual.

A) When you look at the front side of the spoon, the light rays reflecting off your face or any other object get reflected by the curved surface of the spoon. This reflection follows the laws of reflection, resulting in an inverted image. Therefore, the image you see of yourself in the spoon is inverted.

B)  In this case, the shiny tablespoon acts as a concave mirror. Concave mirrors can produce reduced images depending on the position of the object relative to the mirror's focal point. When the object is held at arm's length, the image formed in the spoon is smaller in size compared to the actual object. Hence, the image you see of yourself in the spoon is reduced.

C) A virtual image is formed when the light rays do not physically converge at the location of the image. In the case of a spoon, the reflected rays from the curved surface do not intersect to form a real image that can be projected onto a screen. Instead, your eyes perceive the apparent image formed by the reflected rays, which is known as a virtual image. Therefore, the image you see of yourself in the spoon is virtual.

Option (A) inverted, (B) reduced, and (C) virtual are the correct answers.

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In this experiment, time represents the variable that is independent and graphed on the horizontal axis.

The period of the pendulum does not depend on the mass of the sphere, only on the length of the chord. Two pendulums with different masses but the same length have the same period. Two pendulums of different lengths have different periods with the pendulum with the longer string having a longer period.

For small deflections of less than 15 degrees, the pendulum experiences simple harmonic oscillations. This means that its restoring force is directly proportional to its deflection. A simple pendulum is called a simple pendulum. The longer the pendulum is, the longer it will take to travel the distance it swings from side to side. The period of a pendulum is the time it takes for the weight to swing and return to its original position so it means a longer period.

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12°C is equal to 53.6°F. Celsius (°C) and Fahrenheit (°F) are both temperature scales used to measure the same physical quantity, temperature.

To convert 12°C to Fahrenheit, use the following formula:

°F = (°C x 9/5) + 32

Plugging in 12°C:

°F = (12 x 9/5) + 32 = 53.6°F

So, 12°C is equal to 53.6°F.

Celsius (°C) and Fahrenheit (°F) are both temperature scales used to measure the same physical quantity, temperature. The Celsius scale is based on the metric system and is used primarily in scientific applications and in most countries around the world. It defines the freezing point of water as 0°C and the boiling point of water as 100°C.

The Fahrenheit scale, on the other hand, is used mainly in the United States and its territories. It defines the freezing point of water as 32°F and the boiling point of water as 212°F. The Fahrenheit scale was defined by a physicist named Daniel Gabriel Fahrenheit in the early 18th century.

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As water flow increases, friction losses in a water distribution pipeline typically increase.

As the stream expansions in a water dissemination pipeline, the erosion misfortunes in the pipeline commonly increment. This is on the grounds that the water coursing through the pipeline makes rubbing as it rubs against the walls of the line. The quicker the water streams, the more prominent the rubbing and consequently the more noteworthy the misfortunes. Moreover, at higher streams, the disturbance of the water likewise builds, which can additionally expand the rubbing misfortunes.

Notwithstanding, it is essential to take note of that the contact misfortunes in a pipeline can likewise be impacted by a few different variables, like the line material, breadth, length, unpleasantness, fittings, and twists. Consequently, now and again, it is conceivable that the rubbing misfortunes might diminish as the stream builds because of changes in these different variables.

By and large, the impact of expanding stream on erosion misfortunes in a water conveyance pipeline can fluctuate contingent upon a few elements, and it is essential to consider this multitude of variables while planning or examining a pipeline framework.

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The element that expands its octet when bonding to a highly electronegative element is typically found in the third row or beyond of the periodic table.

When atoms form covalent bonds, they share electrons to fill their outermost energy level (valence shell). The valence shell can hold a maximum of eight electrons, which is known as the octet rule. However, there are some elements that can accommodate more than eight electrons in their valence shell by using their d-orbitals. This is called an expanded octet.

The element that expands its octet when bonding to a highly electronegative element is typically found in the third row or beyond of the periodic table.One common example of an element that expands its octet is sulfur (S). When sulfur forms covalent bonds with highly electronegative elements such as fluorine (F) or oxygen (O), it can use its d-orbitals to accommodate additional electrons beyond its normal valence shell of six electrons

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Non-polarized capacitors also referred to as ceramic capacitors or ac capacitors can be used on both ac and dc circuits.

A capacitor is an electronic device that stores electrical energy. It has two terminals and is a passive electrical component. Capacitance refers to the amount of electric energy a capacitor can store. The capacity of a capacitor is measured in Farads (F).

AC and DC circuit is categorized as per the type of current that flows through the circuit. The direction of the current in alternating current alternates between moving forward and moving backwards. When in direct current, it consistently flows in a single direction.

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So, the impulse of the ball to the wall is -12 N. It have same meaning to 12 N in opposite direction with its initial movement.

Hi ! In this ocassion, I will help you to solve the question about impulses. Impulse also relate to momentum, where the amount of impulse will cause the difference (indicated in units of direction) velocity when an object move. Impulses that have opposite direction to the original direction will have a negative value.

Impulse is the result of a change in momentum, so it can be expressed in this formula :

\(\sf{I = \Delta p}\)

\(\boxed{\sf{\bold{I = m (v' - v_0)}}}\)

With the following condition:

\(\sf{I = m (v' - v_0)}\)

\(\sf{I = 0.15 (-30 - 50)}\)

\(\sf{I = 0.15 (-80)}\)

\(\boxed{\sf{I = -12 \: N.s}}\)

So, the impulse of the ball to the wall is -12 N. It have same meaning to 12 N in opposite direction with its initial movement.

Answer:

c ok      

Explanation: right?

Answer:

16

Explanation:

A direct circuit is so called because it is a circuit that has only one uninterrupted path for the electric current to flow from the power source (the battery) to the load (the light bulb).

A circuit is an electrical network or system that allows the flow of electrical current. It is composed of components such as resistors, capacitors, inductors, switches, and transistors, which are connected to each other by conductive wires or traces. The components in a circuit are arranged in a way that allows electrons to flow through the circuit in a controlled manner. A circuit may have multiple paths for electrons to travel, allowing it to be used for multiple purposes. Circuit diagrams are used to represent the physical layout of a circuit, showing how the components are connected. A circuit can be used for a variety of applications such as powering a device, controlling a system, or providing a signal. Circuits are also used to create integrated circuits that are used in modern electronics.

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The exact atomic weight of the element would be approximately 3.019.

The atomic weight of an element is typically represented by the average atomic mass of its isotopes, taking into account their relative abundances. Given that the approximate atomic weight of the element is 26.89, and the equivalent weight (also known as gram equivalent weight) is 8.9, we can calculate the exact atomic weight using the following relationship:

Exact Atomic Weight = Approximate Atomic Weight / Equivalent Weight

Exact Atomic Weight = 26.89 / 8.9

Exact Atomic Weight ≈ 3.019

Therefore, the exact atomic weight of the element would be approximately 3.019.

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If we could stop our eyes from quivering as we stared at a stationary object, the object would likely appear more brilliantly colored.

Hence, the correct option is C.

The quivering of the eyes, which is called microsaccades, serves to refresh the visual information that the retina receives, allowing us to perceive a stable image despite the constant movement of our eyes. When we fixate on a stationary object for a prolonged period without any eye movement, the retinal cells become fatigued, resulting in a decrease in the perception of contrast and color saturation.

Therefore, if we could prevent our eyes from quivering, the retinal cells would remain fresh, and the object would appear more brilliantly colored.

Hence, the correct option is C.

The given question is incomplete and the complete question is '' If we could stop our eyes from quivering as we stared at a stationary object, the object would probably

a .vanish from sight.

b. stimulate feature detector cells located in the retina.

c. appear more brilliantly colored.

d. appear to change colors.

e. appear to move from side to side''.

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Answer:

Explanation:

I am unable to provide the exact number of cups of sugar that Felisha should mix with 6 cups of water without more information. The amount of sugar needed would depend on the recipe or desired sweetness level. For example, if the recipe calls for a simple syrup (equal parts sugar and water) then Felisha would need to mix 6 cups of sugar with 6 cups of water. However, if the recipe calls for a lighter syrup or less sweetness, she would need to adjust the amount of sugar accordingly. It's important for Felisha to taste the mixture as she goes and adjust it to her preference.

Answer:

Potential energy is energy that is stored-or conserved-in an object or substance. This stored energy is based on the position, arrangement or state of the object or substance

Answer:

please give me brainlist and follow

Explanation:

topographic map

A topographic map shows a three-dimensional representation of a flat surface. It has contour lines joining points of equal elevation; the closer the lines are the steeper the elevation is.

Answer:

Explanation:

Retrograde motion in astronomy is, in general, orbital or rotational motion of an object in the direction opposite the rotation of its primary, that is, the central object (right figure). It may also describe other motions such as precession or nutation of an object's rotational axis. Prograde or direct motion is more normal motion in the same direction as the primary rotates. However, "retrograde" and "prograde" can also refer to an object other than the primary if so described. The direction of rotation is determined by an inertial frame of reference, such as distant fixed stars.

Retrograde motion occurs when a planet far from another planet and from which it is seen rotates at lower speed, creating the impression that it is "retrograding" with respect to the other planet.

Early astronomers get confused as they viewed the motion in the sky because they tried to explain it in terms of the geocentric theory.

Let suppose that we have a planetary system formed by a star and two planets rotating uniformly around the star. Besides, we assume that both planets are rotating at different velocities, and that planet A is more far away from the star than planet B, then the velocity of the planet A relative to planet B is:

\(\vec v_{A/B} = \vec {v}_{A}- \vec {v}_{B}\) (1)

A retrograde motion of planet A occurs when \(\|\vec v_{A/B}\|\ne 0\) and if \(\|\vec v_{A}\| < \|v_{B}\|\) at least. In other words, retrograde motion exists when speed of planet A is less than speed of planet B, creating the impression that planet A is "retrograding" with respect to planet B.  This question is easy to solve and to explain by considering the star as an inertial framework, base of the heliocentrical model.

Early astronomers were confused and unable to explain the phenomenon due to their adherence to geocentrical model, which assumed the Earth was the center of the solar system.

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Answer: To calculate the heat energy required to raise the temperature of a substance, we use the formula:

Q = m * c * ΔT

where Q is the heat energy, m is the mass of the substance, c is the specific heat capacity of the substance, and ΔT is the change in temperature.

For liquid water, the specific heat capacity is approximately 4.18 J/g°C.

So, for 300 g of liquid water to be raised by 30°C, we have:

Q = 300 g * 4.18 J/g°C * 30°C

Q = 37,620 J

Therefore, 37,620 Joules of heat energy must be absorbed by 300 g of liquid water to raise its temperature by 30 degrees Celsius.

The question is: You have 500g of ethyl alcohol at a temperature of -40 ° C. How much heat is needed to transform it into steam at a temperature of 150ºC?

Answer: 233700 J heat is needed to transform ethyl alcohol into steam at a temperature of \(-40^{o}C\) to \(150^{o}C\).

Explanation:

Given: Mass = 500 g

Initial temperature = \(-40^{o}C\)

Final temperature = \(150^{o}C\)

The standard value of specific heat of ethyl alcohol is \(2.46 J/g ^{o}C\).

Formula used to calculate the heat energy is as follows.

\(q = m \times C \times (T_{2} - T_{1})\)

where,

q = heat energy

m = mass of substance

C = specific heat

\(T_{1}\) = initial temperature

\(T_{2}\) = final temperature

Substitute the values into above formula as follows.

\(q = m \times C \times (T_{2} - T_{1})\\= 500 g \times 2.46 J/g^{o}C \times [150 - (-40)]^{o}C\\= 233700 J\)

Thus, we can conclude that 233700 J heat is needed to transform ethyl alcohol into steam at a temperature of \(-40^{o}C\) to \(150^{o}C\).

The amount of space a wave covers in a certain amount of time, such as the number of meters it covers in a second, is known as its speed of wave.

The formula Speed = Wavelength x Frequency relates wave speed to both wavelength and wave frequency. The formula wave speed = frequency x wavelength relates wave speed to wavelength, frequency, and period. The speed of light, or roughly 300,000 kilometers per second, is the absolute speed limit at which a wave can move according to Einstein's theory of special relativity. A change in the medium is truly necessary to modify the wave's speed since the wave's speed is a feature of the medium. The wave speed is constant if the medium does not alter during the wave's motion.

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If a metal ball is suspended by a rod , the forces acting on the system are balanced so there is no motion observed in the system and this is because of the upward tension in the rod .

Option 1 says : the tension in the rod

The gravitational pull that is acting downwards direction and the tension in rod that is acting in a anti parallel direction to the gravitational pull . being on the same line of action and in opposite directions , these forces cancels each other out .

Option 2 says : the friction of rod

Friction acts in cases of contact forces like a drag or pull not in cases of non-contact forces like gravity , thus friction can't balance it .

Option 3 says : the electromagnetic force

There are no charges or magnets present in the system so the electromagnetic force is absent in this case Thus they cant balance the gravitational force.

Option 4 says : the strong force around the rod

The strong force around is not on the line of action of the gravitational pull so it cant balance it.

So out of all the forces only the tension present in the rod is able to balance the gravitational force

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the sound level in decibels of a sound wave with an intensity of 4.80µW/m2 is 66.81 dB.

To calculate the sound level in decibels (dB) of a sound wave with an intensity of 4.80µW/m2, we use the formula:

Sound level (dB) = 10 log10(I/I0)

Where I is the intensity of the sound wave and I0 is the reference intensity, which is typically 1.00 × 10−12 W/m2.

Substituting the given values, we get:

Sound level (dB) = 10 log10(4.80 × 10−6/1.00 × 10−12)
                 = 10 log10(4.80 × 106)
                 = 10 × 6.6812
                 = 66.81 dB

Therefore, the sound level in decibels of a sound wave with an intensity of 4.80µW/m2 is 66.81 dB.

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Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 10 × 16

We have the final answer as

Hope this helps you

Answer:

we have to apply force to move something things wants to save their position and if we want to change it

we have too apply force

Answer:

we have to apply

them to have a answer

Answer:

They hit the ground at the same time

Explanation:

If you ignore air friction, the acceleration of gravity is the same on both of the balls.

The question asks for the kinetic energy of the products of the decay to be determined, which is given as -4.57 MeV.

It presents a nuclear decay problem involving the isotopes 56Co and 26Fe. The atomic masses of these isotopes are provided, and it is stated that 56Co decays into 26Fe.

The type of decay that will occur is then asked, and the options are given as 2He (alpha) decay, positron decay, or beta decay. It is then confirmed that beta decay is the correct answer.

Finally, the question asks for the kinetic energy of the products of the decay to be determined, which is given as -4.57 MeV.

This problem involves knowledge of nuclear decay and the calculation of kinetic energy from mass differences.

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It would take the plane approx. 93 seconds to fly once around circle, traveling at a constant speed of 180 m/s

Speed is defined as the rate of change of position of object in any direction. Speed is measured as the ratio of distance to the time in which that distance was covered.

The circumference of a circle is 2 * pi * radius, where pi is approximately 3.14. Therefore, circumference of the circle with a radius of 2700 m is:

2 * pi * 2700 m = 16,800 m

Given, constant speed of 180 m/s

As, distance = speed * time

So, time = distance / speed

time = 16,800 m / 180 m/s

So, time = 93.333 seconds or 93 seconds and 20 milliseconds

It would take plane approximately 93 seconds to fly once around the circle, traveling at the constant speed of 180 m/s

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The scientist would look out for patterns and connections. Option D

We define data as a set of facts that we can obtain from a study. We know that scientists are always engages in some kind of study and the reason for the study is that they want to obtain the reasons for certain occurrence.

It is common that when we present a professional scientist with a data set, what first comes to mind is that we need to find the patterns that are in the data set as well as the connections.

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