A 20-gram bullet traveling at 250 m/s strikes a block of wood that weighs 2 kg. With what velocity will the block and bullet move after the collision? [convert g to kg]

Answer:

Explanation:

First we must know that the direction along the vertical are towards North and south while along the horizontal are towards east and west.

Sum of distances along the vertical

4km due north = +4km

3 Km South = -3km (south is along the negative y direction)

6 Km South = -6km

total distance along the vertical = 4-3-6 = -5km

Sum of distances along the horizontal;

8km due East = +8km

4 Km west = -4m (west is along the negative x direction)

total distance along the horizontal = 8-4 = 4km

Displacement is gotten by using Pythagoras theorem

d² = x²+y²

d² = (4)²+(-5)²

d² = 16+25

d² = 41

d = √41

d = 6.4km

Hence Tyler's displacement is 6.4km

Answer:

same as other person

Explanation:

Answer:

The Answer is: ∴t=150 nm.

Given that the wavelength of the wave is

The frequency of the wave is f = 3 Hz

We have to find the speed of the wave.

Let the speed of the wave is v.

The speed can be calculated by the formula,

Substituting the values, the speed of the wave will be

Thus, the speed of the wave is 6900 m/s.

2800 m

Given

time = 80 s

average velocity = 35 m/s

Required

total distance before it broke down

Solution

Average velocity : total displacement : total time

Can be formulated

avg velocity = Δx : Δt

Input the value :

Δx=avg velocity x Δt

Δx = 35 m/s x 80 s

Δx = 2800 m

In addition, if we are asking for velocity, we must know the starting and ending points (displacement)

But if we calculate the total distance, what is written is the average speed

avg speed = total distance : total time

Answer:

Reflection is simply the property of a light that rebounds or bounces back after hitting a surface.

Refraction is when the light, which passes through a surface, undergoes some changes in appearance whenever it usually passes through a medium.

Answer:

Vf = 73.4 m/s

Explanation:

This is the case of vertical motion where we have to find the final velocity of the penny when it hits the ground. We can use 3rd equation of motion to find the final velocity:

2gh = Vf² - Vi²

where,

g = 9.8 m/s²

h = height = 275 m

Vf = Final Velocity = ?

Vi = Initial Velocity = 0 m/s

Therefore,

2(9.8 m/s²)(275 m) = Vf² - (0 m/s)²

Vf = √5390 m²/s²

Vf = 73.4 m/s

The speed with penny dropped from the Golden Gate Bridge hits the ground is 73.4m/s.

Given the data in the question;

Since the penny was at rest before it was dropped

Final velocity; \(v = \ ?\)

To determine the speed with which the penny hits the ground, we use the Third Equation of Motion:

\(v^2 = u^2 + 2as\)

Where v is the final velocity, u is the initial velocity, s is the height of the bridge and a is acceleration due to gravity ( since its under gravity; \(a = g = 9.8m/s^2\) )

We substitute our values into the equation

\(v^2 = 0 + [ 2\ *\ 9.8m/s^2\ *\ 275m]\\\\v^2 = 5390m^2/s^2\\\\v = \sqrt{5390m^2/s^2}\\\\v = 73.4 m/s\)

Therefore, the speed with penny dropped from the Golden Gate Bridge hits the ground is 73.4m/s.

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If  f : G → H  is an isomorphism and  g : H → S  is an isomorphism , then there is an isomorphism  g∘ f : G → S .This is one of the reasons that isomorphism is an equivalence relation on the set of groups; this is simply the transitive property.

An isomorphism is an invertible map between two entities that maintains the relevant structure or structures. Depending on the structures we want to maintain, the same two entities can be isomorphic to one another or not. An inverse mapping can reverse an isomorphism, which is a mapping between two structures of the same type that preserves structure. If an isomorphism can be found between two mathematical structures, they are said to be isomorphic. The words "isomorphism" and "equal" come from the Ancient Greek and mean "form" or "shape," respectively.

Because two isomorphic things share the same features, isomorphisms are interesting (excluding further information such as additional structure or names of objects). As a result, isomorphic structures can be recognized even when viewed solely from the perspective of structure. When an isomorphism cannot be identified, one states that two objects are identical. Two objects are said to be identical up to an isomorphism in mathematical jargon.

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Answer:

science is the intellectual pratical activity encompassing the scientific study of structure of the physical and natural world through observations while trickery is the practice if decep5

The Sun's rays are most direct at the equator during an equinox.

An equinox occurs twice a year when the Sun is directly above the Earth's equator. At this time, the Earth's axis is not tilted towards or away from the Sun, resulting in equal day and night durations across most regions of the world.

The term "direct rays" refers to the Sun's rays striking the Earth's surface at a perpendicular angle. Since the equator is located at 0° latitude, it lies directly under the Sun during an equinox. As a result, the Sun's rays are most direct at the equator during this period, providing relatively equal amounts of sunlight and heat to both the Northern and Southern Hemispheres.

Moving away from the equator towards the poles, the angle at which the Sun's rays hit the Earth becomes more oblique. Consequently, the sunlight is spread over a larger area, resulting in less direct sunlight and cooler temperatures. However, during an equinox, the equator experiences the most direct sunlight due to its position relative to the Sun.

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The interstellar medium (ISM) is transparent at near-infrared and radio wavelengths but opaque in visual wavelengths   due to the following reasons:

1. Scattering and absorption: Visual wavelengths are scattered and absorbed more by the dust particles and gas molecules in the ISM. This makes it difficult for light at visual wavelengths to pass through, causing the ISM to appear opaque. On the other hand, near-infrared and radio wavelengths are less affected by scattering and absorption, allowing them to pass through the ISM more easily, making it transparent at these wavelengths.

2. Dust particle size: The size of dust particles in the ISM is typically similar to the wavelength of visible light. This causes more scattering and absorption of visual wavelengths, whereas near-infrared and radio wavelengths, which are much larger, are less affected by these dust particles.

3. Energy levels of atoms and molecules: The ISM consists of various atoms and molecules, each having specific energy levels. Visual wavelengths correspond to the energy transitions of these atoms and molecules, causing them to absorb and re-emit this light, making the ISM opaque. Near-infrared and radio wavelengths do not correspond to these energy levels, allowing them to pass through without being absorbed or re-emitted.

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The ideal efficiency of an engine can be calculated using the Carnot efficiency formula, which depends on the temperatures of the hot and cold reservoirs. Given the fuel temperature of 1300 K and the surrounding air temperature of 200 K, the ideal efficiency can be determined.

The ideal efficiency of an engine is given by the Carnot efficiency formula: efficiency = 1 - (Tc/Th), where Tc is the temperature of the cold reservoir and Th is the temperature of the hot reservoir. In this case, the fuel temperature of 1300 K represents the hot reservoir, and the surrounding air temperature of 200 K represents the cold reservoir.

Substituting the values into the formula, we have efficiency = 1 - (200/1300). Simplifying the expression gives us the ideal efficiency of the engine.

The Carnot efficiency represents the maximum efficiency that an engine can achieve when operating between two temperature extremes. It is based on the idealized Carnot cycle, which assumes reversible processes. Efficiency is a measure of how effectively the engine can convert thermal energy into useful work. In this case, the given temperatures allow us to calculate the ideal efficiency of the engine.

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Explanation:

A) 1.05

B) 1.33

C) 1.16

D) 0.62

All units in cm

The net force acting on it during free fall would also be 1 Newton.The given terms are "an apple at rest weights 1 N. The net force on the apple when it is in free fall is".

The weight of the apple at rest is 1 N.The force which acts on the apple when it is in free fall is called its weight which is given by the formula:

Weight=mg

where,m=mass of the apple

g=acceleration due to gravity

=9.8 m/s²

Therefore, the weight of the apple is:

Weight=mg

=1 N

The net force on the apple when it is in free fall is equal to the weight of the apple, which is 1 N.

The content you provided describes an apple that is initially at rest and weighs 1 Newton (symbolized as "1 N"). When the apple is in free fall, meaning it is falling under the influence of gravity without any other forces acting on it, the net force on the apple is its weight. In this case, the weight of the apple is equal to 1 Newton, so the net force acting on it during free fall would also be 1 Newton.

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This is an example of a dissolution process.

When a crystal of potassium permanganate is placed into water, it dissolves and forms a solution. Potassium permanganate is a highly soluble compound in water.

The solid crystal of potassium permanganate initially has a distinct color, which is usually purple or dark violet. However, as it dissolves in water, the solid color disappears, and the water becomes evenly colored. This happens because the potassium permanganate molecules disperse uniformly throughout the water, leading to a homogeneous solution.

In a solution, the solute particles (potassium permanganate molecules) are dispersed and surrounded by the solvent particles (water molecules). The solute particles mix thoroughly with the solvent particles, resulting in a solution that appears uniformly colored.

The disappearance of the solid color and the even distribution of color throughout the water indicate that the crystal of potassium permanganate has undergone dissolution, forming a homogeneous solution.

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Atoms have no electric charge because they have an equal number of electrons and protons.

Explanation:

So from this, we can conclude that atoms have no electric charge because they have an equal number of electrons and protons. Option C is correct.

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When a car rounds a curve, it experiences a centripetal acceleration towards the center of the curve. The magnitude of this acceleration depends on the speed of the car and the radius of the curve. The magnitude of the car's acceleration is  \(5.0 m/s^2\), which is option (C).

We can use the centripetal acceleration formula to solve this problem:

a =\(v^2 / r\)

where a is the centripetal acceleration, v is the speed of the car, and r is the radius of the curve.

Plugging in the given values, we get:

a =\((10 m/s)^2 / 20 m\)

a = \(5 m/s^2\)

Therefore, the magnitude of the car's acceleration is \(5.0 m/s^2\),  which is option (C).

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Answer: i think its c

Explanation:

Answer:

a

Explanation:

Answer:

(1) The orbits are ellipses, with focal points ƒ1 and ƒ2 for the first planet and ƒ1 and ƒ3 for the second planet. The Sun is placed in focal point ƒ1.

(2) The two shaded sectors A1 and A2 have the same surface area and the time for planet 1 to cover segment A1 is equal to the time to cover segment A2.

(3) The total orbit times for planet 1 and planet 2 have a ratio a13/2 : a23/2

Answer:

g the day off and I will be there at work and I will be there at work and I will

Explanation:

you are not going to be able to make it to the meeting tonight but I can tomorrow

Comparing the total losses (0.22) with the total gain (0.25), we can see that the gain is higher than the losses. Therefore, the laser system is likely to achieve laser oscillation and work successfully.

To assess if the laser will function, we must analyse the parameters for producing laser oscillation, especially the gain and loss threshold conditions.

Amplification of light happens within the gain medium (in this example, the Nd:YAG crystal) in a laser system, whereas losses occur owing to reflection and transmission at the mirrors.

The amplification of light inside the Nd:YAG crystal is determined by the gain coefficient of the crystal.

The threshold condition for laser oscillation:

Gain * Length > Loss,

The maximal gain coefficient shown by the Nd:YAG crystal in this example is 5m-1, and the crystal length is 5 cm (0.05 m). As a result, the overall gain is 5m-1 * 0.05 m = 0.25.

Mirror 1: Loss = (1 - Reflectivity) * 2 = (1 - 0.99) * 2 = 0.02

Mirror 2: Loss = (1 - Reflectivity) * 2 = (1 - 0.90) * 2 = 0.2

Total Loss = Loss (Mirror 1) + Loss (Mirror 2) = 0.02 + 0.2 = 0.22

When we compare the overall losses (0.22) to the total gain (0.25), we notice that the gain is greater than the losses.

Thus, the laser system is likely to acquire laser oscillation and function properly.

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Answer:

Explanation:

all

The  statement that describes a planet as it moves along its orbit is option D:  It travels slowest but experiences a stronger gravitational pull when it is closest to the sun.

The above option is chosen because a planet's speed and the strength of the gravitational force acting on it are determined by the distance between the planet and the sun.

The planet's speed is determined by the balance between the sun's gravitational pull and the planet's inertia, or tendency to continue moving in a straight line. When the planet is closer to the sun, the sun's gravitational pull is stronger, which causes the planet to slow down.

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The ball will hit the ground after approximately 1.88 seconds and at a horizontal distance of approximately 34.15 ft away.

a. To find the position vector of the particle at time t, we can use the kinematic equation for motion with constant acceleration. The position vector ⃗r(t) is given by ⃗r(t) = ⃗r₀ + ⃗v₀t + 0.5⃗at², where ⃗r₀ is the initial position vector, ⃗v₀ is the initial velocity vector, ⃗a is the acceleration vector, and t is the time.

Plugging in the values, we have ⃗r(t) = (5, 0, 4) + (0, 0, 7)t + 0.5(-11, -1, -5)t², which simplifies to ⃗r(t) = (5 - 11t^2, -t, 4 - 5t^2). This gives the position vector of the particle at any given time t.

b. For the baseball, we can analyze its motion using projectile motion equations. The vertical and horizontal motions are independent of each other, except for the initial velocity. The vertical motion is affected by gravity, with an acceleration of -32 ft/s².

Using the given initial speed of 26 ft/s and the launch angle of 20 degrees, we can decompose the initial velocity into its vertical and horizontal components. The vertical component is 26 * sin(20°) ft/s, and the horizontal component is 26 * cos(20°) ft/s.

To find the time of flight, we can use the equation for vertical motion: y = y₀ + v₀yt + 0.5at². The initial vertical position is 40 ft, the initial vertical velocity is 26 * sin(20°) ft/s, and the vertical acceleration is -32 ft/s². Solving for t, we get t ≈ 1.88 seconds.

To find the horizontal distance, we use the equation x = x₀ + v₀xt, where the initial horizontal position x₀ is 0 ft (assuming the ball is thrown from the stands), the initial horizontal velocity v₀x is 26 * cos(20°) ft/s, and the time of flight t is approximately 1.88 seconds. Solving for x, we find x ≈ 34.15 ft.

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Answer:

By opening the door, Elijah is using the chemical energy, which he obtained from eating food to do work. Thus, he is converting chemical energy to mechanical energy.

Stretching the spring by opening the screen door convert the potential energy which is stored in the spring to kinetic energy.

Overall there is conversion of chemical energy to potential energy.

By letting the door go, Elijah is using chemical energy. By snapping shut, the door is converting potential energy to kinetic energy. The overall energy change is conversion of chemical energy to kinetic energy.

Explanation:

Answer:

Explanation:

Same i need help

Ice floats in liquid water because it is less dense than liquid water. When water freezes, the molecules form a crystalline structure that spaces them out more than in the liquid state. This increase in space between the molecules causes the density of ice to be less than that of liquid water. As a result, ice floats on the surface of liquid water. This property of water is important for aquatic life, as it allows for the formation of a stable environment beneath the surface of frozen bodies of water.

Answer:

Ice floats in liquid water because it is less dense than liquid water. This is because the hydrogen bonds that hold water molecules together in ice are more ordered and spaced farther apart than in liquid water. As a result, there is more empty space between the water molecules in ice than in liquid water, making ice less dense.

This is counterintuitive since most substances become denser as they solidify. However, water is different because of the way its molecules interact. Water molecules are polar, meaning they have a slight positive charge on one end and a slight negative charge on the other end. This allows them to form hydrogen bonds with each other, which are stronger than the van der Waals forces that hold most other substances together.

When water freezes, the hydrogen bonds between water molecules become more ordered and form a crystalline structure. This structure has empty spaces between the water molecules, which makes ice less dense than liquid water. Because ice is less dense than liquid water, it floats on top of it. This is important for aquatic ecosystems since if ice were denser than liquid water, it would sink and accumulate at the bottom of bodies of water, which could have negative effects on the organisms living there.

Answer:

3 m/s

Explanation:

have a good day

There is no friction or very little friction between the box and the floor, the coefficient of friction between them is 0.

The equation of motion with constant acceleration to get the coefficient of friction between the box and the floor:

v = u + at

where:

v = final velocity (0 m/s, since the box stops)

u = initial velocity

a = acceleration

t = time taken to stop (2.2 s)

To solve for acceleration, we can rearrange the equation as follows:

a = (v - u) / t

The final velocity (v), resulting from the box coming to a standstill, is 0 m/s. When we enter the values, obtain:

0 = (u - 0) / 2.2

Solving for u:

u = 0 m/s

This implies that the box was not given any starting velocity and was thrown without any initial speed because the initial velocity of the box is 0 m/s. Now, we can compute the frictional force using the equation shown below:

frictional force = μ * normal force

where μ is the coefficient of friction and normal force is the force exerted by the floor on the box, which is equal to the weight of the box, given by:

weight of box = mass * acceleration due to gravity

mass of box = 10 kg (given)

acceleration due to gravity = 9.8 m/s²

So, the normal force is:

normal force = 10 kg × 9.8 m/s² = 98 N

The force that stops the box because it is sliding on a flat surface is the frictional force, often known as the force of kinetic friction. The sources of the frictional force are:

frictional force = mass of box ×acceleration × coefficient of friction

Substituting the known values, we get:

frictional force = 10 kg × a × μ

We already found that the acceleration (a) is 0 m/s², since the box comes to a stop. Therefore, the frictional force is also 0 N.

Now, can equate the frictional force to the normal force and solve for the coefficient of friction (μ):

0 N = μ × 98 N

μ = 0 N / 98 N = 0

Since, if the floor is particularly smooth or if there is another lubricant present between the box and the floor, this may occur.

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The field of science that deals with the practical application of a liquid in motion is called fluid mechanics.

The fluid mechanics is the branch of science that deals with the practical application of a liquid when it is in motion or in rest.

Pascal's law, equation of continuity and Bernoulli's equation all comes under the study of fluid mechanics.

Fluid mechanics is the field of science because of which we are able to make the break of the vehicles hydraulic lift hydraulic press and many more things. We are able to make the Barometer, thermometer and many other things because of the practical applications of fluid mechanics.

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Answer:

a.200 Newtons

Explanation:

Given the following data;

Mass = 20kg

Acceleration = 10m/s²

To find the force;

Force is given by the multiplication of mass and acceleration.

Mathematically, Force is;

\( F = ma\)

Where;

F represents force.

m represents the mass of an object.

a represents acceleration.

Substituting into the equation, we have

\( Force = 20 * 10 \)

Force = 200 Newton.