An archer stands on the ground and fires an arrow at a target. A second archer stands at the top of a building and holds an arrow in his hand. Which arrow has more potential energy?
In the same scenario described in question 7, which arrow has more kinetic energy? Explain.

Sunrise at A occurs during the winter solstice, sunrise at B occurs during the vernal equinox, and sunrise at C occurs during the summer solstice.

The eastern horizon is where the sun rises, and the position of sunrise changes throughout the year due to the tilt of the Earth's axis.

In this case, the diagram shows three different positions of sunrise, A, B, and C.

Here's the correct pairing of the location of sunrise to the time of the year:

A - Winter Solstice (December)
B - Equinoxes (March and September)
C - Summer Solstice (June)

During the Winter Solstice (A), the sun rises at its southernmost point on the horizon. During the Equinoxes (B), the sun rises due east, and during the Summer Solstice (C), the sun rises at its northernmost point on the horizon.

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Light rays first pass through the transparent layer called the cornea and then refracted again as they pass through the transparent lens.

How do light rays flow in the eyes?

The first factor in the journey of light via the eye is the objects being seen and how they produce, reflect, or change the light in various ways.

The visual cortex of the brain's occipital lobe serves as the destination of the light pathway, which starts with photoreceptors in the retina. Rod and cone cells are two different types of photoreceptors. When it comes to eyesight in low light and in peripheral vision, rods can be especially helpful.

The cornea is where most of the refraction occurs as light enters the eye's curved, transparent front surface. The natural or crystalline lens of the eye also distorts light rays. When an item passes in front of the eye, its rays pass through the transparent cornea and enter the eye.

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The type of light that best illustrates the photoelectric effect is (c) ultraviolet light. Hence, the correct answer is option c).

Photoelectric effect refers to the emission of electrons from a metallic surface when a light of suitable frequency shines on the surface of the metal. The phenomenon, first noticed by Heinrich Hertz in 1887, was explained in 1905 by Albert Einstein when he used Planck's hypothesis to illustrate that light energy is carried in discrete quantized packets to describe the photoelectric effect.

In relation to photoelectric effect, the type of light that best illustrates it is ultraviolet light. This is because ultraviolet light has a high enough frequency to remove electrons from the metal surface. As a result, electrons that absorb photons with enough energy from the ultraviolet region of the electromagnetic spectrum will be ejected from the metal, causing the photoelectric effect, and producing an electric current.

When light is shone on a metallic surface, an electric current is produced, which is called the photoelectric effect. The photoelectric effect is caused by the emission of electrons from a metal surface that is exposed to a light of suitable frequency. The energy of the electrons depends on the frequency of the light, and the intensity of the light determines the number of electrons ejected from the surface.

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If you start with 1,000 grams of erbium-165, the time it  will take to have 125 grams of erbium-165 left in the sample is 20.8 hours.

option D is the correct answer.

Half life is the time that it takes for half of the original value of some amount of a radioactive element to decay.

If you start with 1,000 grams of erbium-165, the time it  will take to have 125 grams of erbium-165 left in the sample is calculated as follows;

1,000 ---------- 0 time

500 ----------- 10.4 hours

125 ------------- 20.8 hours

Thus, from the calculation done above, we can see that If you start with 1,000 grams of erbium-165, the time it  will take to have 125 grams of erbium-165 left in the sample is 20.8 hours.

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Answer:

The correct answer is - separation.

Explanation:

Communication practice is the ability to the explaining or showing emotions in various ways such as reading, talking, expressing, performing, writing, and witnessing or showing signs.

Separation is an example of communication practice with that in this case LGBTQ community showing their expression that they exist and different from others by displaying rainbows and wearing pink clothing.

Thus, the correct answer is -  separation.

Answer: The answer is B.

Explanation: Trust me, i'm right.

At point A the spinning wheel will experience least centripetal force.

A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

Centripetal force is applied on object depends on the centre and object distance. So B will experience maximum force while A is least.

At point A the spinning wheel will experience least centripetal force.

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Answer: a fuse wire is a wire of high resistance and low melting point.

Answer:

Potential Energy

Answer:

Work input W = -200.39 KJ

Explanation:

From the question, we are given;

m = 1.15 kg

Constant temperature T1 = T2 = 27 + 273 = 300k

Since the temperature is constant, we can say that the process is isothermal

P1 = 111 KPa

P2 = 0.84 MPa = 0.84 * 1000 KPa = 840 KPa

Now what we want to calculate is W1-2

Mathematically, for isothermal process;

W1-2 = mRTlnP1/P2

where R can be obtained from table and it is equal to 0.287 KJ/kg.k

Hence;

W1-2 = (1.15)(0.287)(300)(ln 111/840)

W1-2 = 99.015 * -2.023871690525 = -200.39 KJ

Kindly note that the value of the work is negative because work is done on the system and not by the system

Answer:

The pressure at the bottom of the river is less than that at the bottom of the lake.

Explanation:

From Bernoulli's equation, the pressure difference is given by

ΔP = ρgΔh + ρ(v₂² - v₁²)/2 where ρ = density of water, g = acceleration due to gravity, Δh = depth, v₁ = velocity at top, v₂ = velocity at bottom

For the lake, v₁ = v₂, since the velocity at the top and bottom are the same. So,

ΔP₁ = ρgΔh + ρ(v₁² - v₁²)/2 = ρgΔh + 0 = ρgΔh

P₂ - P₁ = ρgΔh

P₂ = P₁ + ρgΔh

For the river, v₁ < v₂, since the velocity at the top of the river is greater than at the bottom.

So,

ΔP₂ = ρgΔh + ρ(v₂² - v₁²)/2.

Since  v₁ < v₂, ρ(v₂² - v₁²)/2 will be negative,

So,

ΔP₂ = ρgΔh - ρ(v₂² - v₁²)/2.

Since ρ(v₂² - v₁²)/2 is negative, making ΔP less than that in the lake.

So, ΔP₂ = ΔP₁ -  ρ(v₂² - v₁²)/2.

ΔP₂ = P₃ - P₁

P₃ - P₁ = P₂ - P₁ -  ρ(v₂² - v₁²)/2.

P₃ = P₂ - ρ(v₂² - v₁²)/2.

where P₃ = pressure at bottom of the river and P₂ = pressure at bottom of the lake and P₁ = atmospheric pressure at top of river and lake respectively.

Since the factor ρ(v₂² - v₁²)/2 is removed from the pressure at the bottom of the lake, the pressure at the bottom of the river is therefore less than that at the bottom of the lake.

Answer:20 miles

Explanation:

Option A. Supports this knowledge. Yes, The beverage will cool faster inside the freezer than the ordinary part of the refrigerator.

Newton's regulation of cooling states that the fee at which an object cools is proportional to the difference in temperature between the item and the item's environment. genuinely put, a pitcher of hot water will settle down faster in a cold room than in a hot room.

Newton's law of cooling explains the rate of cooling of a frame. The charge at which an item cools down is immediately proportional to the temperature difference between the object and its surroundings.

Newton's regulation of cooling applies to both warming and cooling. the heat loss with time is dependent on the distinction in temperature between the 2 our bodies.

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Disclaimer:- your question is incomplete, please see below for the complete question.

it is commonly thought that a can of beverage will cool faster in the coldest part of a refrigerator. knowledge of newton's law of cooling,

A. Supports this knowledge

B. Show this knowledge is false

C. May or may not support this knowledge

D. May or may not contradict this knowledge

Inferring an internal shear force, VA = -5 kips (downward) or 5 kips from the equation in vertical equilibrium, Fy = -5 - VA = 0, (upward). MA = -5(2.5) - MA = 0, according to the moment equilibrium equation.

An item can be turned by a force or combination of forces. A moment seems to be the result of a force turning. Moments move in such a clockwise or counterclockwise direction around a point. The pivot, often referred to as the fulcrum, is typically chosen as the chosen point, though any point here on object could be picked.

When a force does not have an equal and opposing force acting immediately across its path of action, a moment results. Consider two individuals attempting to open a door there at doorknob from opposing sides. There is an equilibrium state if they are both pushing with the same amount of force.

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Answer:

The relationship of the speed of sound, its frequency, and wavelength is the same as for all waves: vw = fλ, where vw is the speed of sound, f is its frequency, and λ is its wavelength. ... The frequency is the same as that of the source and is the number of waves that pass a point per unit time.

Explanation:

HOPE THIS HELPS ;}

Answer:

In pair production, after the loss of Kinetic energy, the angular separation between the two photons is 180°.

Explanation:

Therefore, the angle of separation between the two photons is 180°.

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The mass of the truck is 1020 kg.

The steps for this process are as follows:

Step 1: Let m1 and m2 be the masses of the car and truck respectively.

Step 2: According to the law of conservation of momentum,

m1v1 + m2v2 = (m1 + m2)vf,

where v1 and v2 are the initial velocities of the car and truck respectively, and vf is the final velocity of the car-truck system.

Step 3: Substitute the given values in the equation to get m2 = 1020 kg.

Step 4: Hence, the mass of the truck is 1020 kg.

The law of conservation of momentum is used in this question. According to the law of conservation of momentum, the total momentum of a system remains constant, regardless of external forces. In this question, the law of conservation of momentum is used to calculate the mass of the truck by equating the total momentum of the system before and after the collision.

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The "Load Capacity" of a jack refers to the greatest weight it can support. Maximum weight of cargo that has been authorised by the country where the vehicle was registered.

We can determine the necessary minimum capacity for a trailer jack by analysing the concentration of loads in a typical trailer.

Thus, the "Load Capacity" of a jack refers to the greatest weight it can support.

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The cards are observed to move forward as the coins gel in the jar. This happens because the coin has rest inertia. Rest inertia is the resistance that an object exerts at rest. resist change and fall into the glass.

Coins have inertia. If you move the card slowly, it won't be fast enough to overcome this force. With a quick flick, the coin stays in one place and falls into the cup. A stationary object remains stationary. You could change position and fall to the ground or be inside the glass. This is because the paper changes its position when a strong force is applied or a quick pull is applied.

The law of inertia, also known as Newton's first law, states in physics that if an object is at rest or moving in a straight line with a constant velocity, it is at rest or moving in a straight line with a constant velocity. We assume that This is when a force is applied.

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Answer:

The planet's mass and size determine the gravity of a planet

Explanation:

The smaller and less mass a planet has, the less gravitational pull it has on things and vice versa. The same can be applied with all living things, we all have an extremely small gravitational pull.

Answer:

Below

Explanation:

ESE = 1/2 k d^2

        = 1/2 *  10 N/m * .1 m = .5 J

Given:

The mass of the ball is

The initial height of the ball is

The initial speed of the ball is

To find:

the impact speed of the ball when it strikes the ground

Explanation:

The initial potential energy of the ball is

The initial kinetic energy is

The final energy of the ball is fully kinetic energy. Let the final impact speed of the ball is

We can write, using the energy conservation principle that

Hence, the final impact speed of the ball is 46.1 m/s.

Two resistors of resistance, 100 and 200 are connected in parallel in an electrical circuit. The ratio of the thermal energy developed in 100 N to that in 200 in a given time is: 4:1 Option 2

This is further explained below.

Generally, Electric circuit, current route. An electric circuit contains a source that powers the current, such as a battery or generator, devices that consume current, such as lights, electricity, or computer, and connecting cables or transmission lines.

In conclusion,The thermal energy created in 100 N to that in 200 in a particular period is divided by both by a factor of 4:1 Option 2

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The Productivity Index (PI) of the well is 2 psi/bbl per day. This indicates the efficiency of the well in delivering fluids from the reservoir to the wellbore.

The Productivity Index (PI) is a measure of the well's ability to deliver fluids from the reservoir to the wellbore. It is calculated by dividing the difference between the reservoir pressure and the flowing bottomhole pressure by the production rate. In this case, the reservoir pressure is given as 3,000 psi, and the flowing bottomhole pressure is measured at 2,990 psi. The production rate is 5 barrels per day.

For calculating the PI, use the formula:

PI = (Reservoir Pressure - Flowing Bottomhole Pressure) / Production Rate

Substituting the given values into the formula:

PI = (3,000 psi - 2,990 psi) / 5 bbls per day

Simplifying the equation:

PI = 10 psi / 5 bbls per day

PI = 2 psi/bbl per day

Therefore, the Productivity Index (PI) of the well is 2 psi/bbl per day. This indicates the efficiency of the well in delivering fluids from the reservoir to the wellbore.

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Answer:

1. a = - 2.5 m/s²

2. t = 2.57 s

Explanation:

1.

The acceleration of the driver can be found using the first equation of motion:

\(v_f = v_i + at\)

where,

vf = final speed = 15 m/s

vi = initial speed = 45 m/s

a = acceleration = ?

t = time = 12 s

Therefore,

\(15\ m/s = 45\ m/s +a(12\ s)\\\\a = \frac{15\ m/s-45\ m/s}{12\ s}\)

a = - 2.5 m/s²

negative sign indicates deceleration

2.

The time taken by the biker to accelerate can be found by using the first equation of motion again:

\(v_f = v_i + at\)

where,

vf = final speed = 18 m/s

vi = initial speed = 0 m/s

a = acceleration = 7 m/s²

t = time = ?

Therefore,

\(18\ m/s = 0\ m/s +(7\ m/s^2)t\\\\t = \frac{18\ m/s}{7\ m/s^2}\)

t = 2.57 s

Answer:

It is because the load is in between fulcrum and effort making a longer effort arm than the load arm resulting to multiplication of force and a mechanical advantage of greater than 1.

Explanation:

The distance from the fulcrum to the effort is the effort arm where as the distance from the fulcrum to the load is the load arm.

The first class lever has a mechanical advantage that varies per the position of the load with respect to effort position from the fulcrum. They have the fulcrum at the middle. For example, a beam balance and a pliers. The formula to remember is FLE for easy categorization of the lever classes.

The second class lever , the load is at the middle.For example a wheel barrow and a bottle opener. In this class, the effort arm is longer than the load arm.The effort is force multiplication making the mechanical advantage to be greater than 1.

The third class of lever has effort in the middle.For example a spade or a knife.In this class effort arm is shorter than the load arm, causing change in direction of force. The effect is a mechanical advantage less than 1.

Answer:

the sponge? huhh what

Answer:

The volume of the object is 3.5cm³