Please help this is due today Paragraph 2 describing wave

interactions.

b) Create a new paragraph. Explain why a mirror is

good for seeing objects and why acoustic panels

are used in concert halls.

Type your paragraph HERE:

Use this text box to type your paragoph.

**Your paragraph should be 5-7 complete sentences. ***

The pre - impact velocity of the bullet is 225 m/s.

We know that we would have to us the principle of the conservation of the linear momentum and in this case we know that the momentum before collision would be greater than the momentum that we have after collision as such we would have;

Momentum after collision = Momentum before collision.

(10 * v) + (80 * 0) = (10 + 80)25

10v = 2250

v = 2250/10

v = 225 m/s

The bullet would have a velocity of 225 m/s from the calculation.

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The resistance of the wire after stretching is 21.6 times the original resistance (21.6R).

The resistance of a wire is directly proportional to its length and inversely proportional to its cross-sectional area. When the wire is lengthened by a factor of 4.65, its resistance will increase by the same factor.

This is because the resistance is determined by the ratio of the length to the cross-sectional area. As the length increases, the resistance increases proportionally. However, the volume of the wire remains constant during the stretching process.

Since the wire has a circular cross-section, its volume is given by V = πr^2L, where r is the radius and L is the length. Since the volume is unchanged, when the length is increased by a factor of 4.65, the cross-sectional area must decrease by the same factor to compensate.

The cross-sectional area of a circular wire is given by A = πr^2. If the length is increased by 4.65 times, the radius will decrease by the square root of 4.65 (approximately 2.155).

Consequently, the cross-sectional area will decrease by the same factor (2.155^2), resulting in a decrease in resistance by a factor of 4.65^2 (approximately 21.6). Therefore, the resistance of the wire after stretching is 21.6 times the original resistance (21.6R).

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Answer:

The force the rock exerts on Sarah =#is 65 N

Explanation:

The given parameters are;

Sarah's weight = 392 N

The force with which Sarah pushes the rock = 65 N

The mass of the rock = 56 kg

The weight of the rock = The mass of the rock × Acceleration due to gravity

∴ The weight of the rock = 56 kg ×9.81 m/s² = 549.36 N

Given that the force Sarah applies to push the rock = 65 N, then by Newton's third law of motion which states that action and reaction are equal and opposite, the force that the rock exert on Sarah is equal an opposite to the force Sarah is applying

Therefore, the force the rock exerts on Sarah = 65 N (in the opposite direction).

A bacteria (10^15 kg) weighs ten times as much as an ordinary cell (10^2 kg for a hummingbird and 10^12 cells for a bacterium). A essential quality of a body is its mass.

It was widely believed to be connected to the volume of matter in a physical body before to the atom's discovery and the development of particle physics. The mass of a unit cell is calculated as the product of the masses of each atom and the quantity of atoms in the unit cell. Mast cells are so-called because they can release protein-antibodies.

(Hummingbird Mass/Cell Mass) = 10^-2/10^-14 = 10^12 cells is the formula for estimating the number of cells.

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The complete question is -

Assuming the mass of an average cell is ten times the mass of a bacterium (which is 10⁻¹⁵ kg):Calculate the number of cells in a hummingbird, assuming it weighs 10⁻² kg.

Answer:

temperiture or annual wind speed.

Explanation:

Answer:

??

Explanation:

Electricity can be applied to a wire to produce a magnetic field.

Magnetic field can be defined as the area around a magnet in which the effect of magnetism is felt.

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Minimum angle: θ ≈ 23.2 degrees | Rock's speed: v ≈ 2.65 m/s

To determine the minimum angle the string can make with the horizontal, we can analyze the forces acting on the rock when it is whirled in a horizontal circle.

Minimum angle:

The tension in the string provides the centripetal force required to keep the rock moving in a circle. The maximum tension the string can withstand before breaking is given as 150 N. At the minimum angle, the tension in the string will be equal to the breaking strength.

The centripetal force is given by the equation: \(F = m * (v^2 / r),\)where F is the force, m is the mass, v is the velocity, and r is the radius of the circle.

At the minimum angle, the tension (F) in the string is equal to the breaking strength, which is 150 N. The mass (m) of the rock is given as 970 g (0.97 kg), and the radius (r) is 1.8 in (0.04572 m). We can solve for the velocity (v).

\(150 N = 0.97 kg * (v^2 / 0.04572 m)v^2 = (150 N * 0.04572 m) / 0.97 kgv^2 = 7.0456 m^2/s^2v = √(7.0456) m/sv ≈ 2.65 m/s\)

Now, we can use trigonometry to find the minimum angle. The tension (150 N) is the vertical component of the tension force, and the horizontal component can be calculated using the angle θ:

Tension (horizontal component) = Tension (vertical component) / tan(θ)

Tension (horizontal component) = 150 N / tan(θ)

Since the tension in the horizontal direction is equal to the centripetal force, we can substitute the centripetal force equation:

\(m * (v^2 / r) = 150 N / tan(θ)\)

Now we can solve for the minimum angle (θ):

\(tan(θ) = (m * v^2) / (r * 150 N)θ = arctan((m * v^2) / (r * 150 N))\)

Substituting the given values, we can calculate the minimum angle.

Rock's speed at the minimum angle:

At the minimum angle, the rock's speed can be calculated using the previously derived velocity value (v).

The rock's speed at the minimum angle is approximately 2.65 m/s.

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The maximum amount of equipment that the players can wear shorts only.

The minimum frequency of breaks that the players must be granted to drink fluids is 20 minutes.

In Science and Physics, relative humidity can be defined as the amount of moisture that is found in the atmosphere in comparison with the amount of air that it can hold at a specific temperature.

Generally speaking, there would be precipitation, cloud, or fog without humidity. In this context, we can logically deduce that the players can wear shorts only, without wearing pads, helmets, and long pants.

Since the time is 2:00 PM, temperature is 85ºF and the relative humidity is 60 percent, it is very important that the players be granted opportunity to drink fluids every 20 minutes.

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Answer:

it may be because of the movement of the atoms. i believe that the heat of the warm water makes it move faster, thus making the object float due to upthrust, or air pressure

The approximate distance from the Earth to the Sun is about 93 million miles

The average distance from the Earth to the Sun is about 93 million miles (149.6 million kilometers). This distance is known as an astronomical unit (AU) and it is used to measure distances within the solar system. It is important to note that this distance is not a constant and varies slightly over time due to the elliptical shape of Earth's orbit around the Sun.

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A vacuum line is attached to a fuel-pressure regulator on many port-fuel-injected engines to create an equal pressure drop across the injectors and ensure consistent fuel delivery. Therefore, Option B is the correct answer.

The vacuum line attached to the fuel-pressure regulator helps create an equal pressure drop across the injectors. This is necessary because the fuel injectors require a specific pressure to deliver the correct amount of fuel to the engine cylinders.

The fuel-pressure regulator's primary function is to maintain a steady fuel pressure within the fuel rail. By connecting the vacuum line to the regulator, the intake manifold's vacuum is used to counterbalance the fuel pressure. As engine load and throttle position change, the intake manifold's vacuum also varies, which in turn affects the fuel pressure delivered to the injectors.

The vacuum line helps ensure that the fuel pressure at the injectors remains consistent regardless of engine load. This is important for maintaining fuel efficiency, engine performance, and emission control. By providing an equal pressure drop across the injectors, the vacuum line helps deliver the correct fuel-air mixture for optimal combustion and engine operation.

Hence, the vacuum line attached to the fuel pressure regulator in port-fuel-injected engines plays a crucial role in maintaining consistent fuel pressure and ensuring proper fuel delivery to the engine's cylinders. Therefore, Option B is the correct answer.

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Answer:

You solve it

Explanation:

Answer:

you just spin it and spin it and spin it                                                                                                                   and spin it                      

and spin it

and spin it

and spin it

and spin it

until you get mad then throw it at the wall

Explanation:

ya then you look up a vid that is called rubix cube meme and there should be a pink animal its funny you should watch it!!!!!!!!!

The balls will be at the same height above the ground at 1.16s.

Equations of motion in physics are equations that explain how a physical system behaves in terms of how its motion changes over time. The behaviour of a physical system is described in more detail by the equations of motion as a collection of mathematical functions expressed in terms of dynamic variables.

Before they collide, the falling ball travels a distance of (20m-h), where h is the height above the earth. We submit

yf= yi + vit - 0.5 gt²

to the falling ball to obtain,

-(20-h)= - 0.5 gt²

Applying yf= yi + vit - 0.5 gt² to the rising ball gives,

h= 17.2t - 0.5gt²

Combining both equations,

t= \(\frac{20}{17.2}\) = 1.16 s

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Answer:

B mate

Explanation:

Answer:

1. Static friction = not moving

2.  sliding friction = moving

3. rolling friction = wheels

4. bumpy the surfaces are

5. how heavy the object is

6. it is easier to keep an object moving

7. static friction is GREATER than sliding friction

Explanation:

The acceleration caused by gravity, or 9.81 m/s², which acts on the object, causes the projectile's vertical velocity to vary.

A projectile's horizontal velocity is constant (a never changing in value), Gravity causes a downward vertical acceleration with a magnitude of 9.8 m/s/s. A projectile's vertical velocity fluctuates by 9.8 m/s per second, A projectile's vertical motion exists unrelated to its horizontal motion.

The acceleration caused by gravity, or 9.81 m/s², which acts on the object, causes the projectile's vertical velocity to vary. Therefore, this choice is likewise false. As is common knowledge, an object's vertical velocity is not constant, and momentum is a function of velocity.

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It would take 1.556 seconds for the barrier to crumple and safely slow down the person with a force of 1180 N.

To calculate the time required to crumple the barrier and safely slow down the person, we can use the concept of impulse.

The impulse, denoted by J, is defined as the product of force and time, and it represents the change in momentum of an object. In this case, the impulse required to safely slow down the person can be calculated using the maximum force and the person's initial momentum.

The momentum of a person is given by the product of their mass and velocity:

Momentum = mass × velocity

Given that the person's mass is 68 kg and their velocity is 27 m/s, the initial momentum is:

Initial momentum = 68 kg × 27 m/s

To safely slow down the person, the impulse provided by the barrier should be equal to the change in momentum.

Therefore, we have:

Impulse provided by barrier = Final momentum - Initial momentum

Since the person is brought to rest, the final momentum is zero. Thus, we have:

Impulse provided by barrier = -Initial momentum

Now we can express the impulse in terms of force and time:

Impulse provided by barrier = Force × Time

Plugging in the known values, we can solve for time:

-Initial momentum = Force × Time

68 kg × 27 m/s = 1180 N × Time

Simplifying the equation, we find:

Time = (68 kg × 27 m/s) / 1180 N

Evaluating the expression:

Time = 1836 kg·m/s / 1180 N

Finally, converting kg·m/s to seconds, we get:

Time ≈ 1.5559 seconds

Therefore, it would take approximately 1.556 seconds for the barrier to crumple and safely slow down the person with a force of 1180 N.

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Explanation:

4.2 converted to grams equal 119.067997125

Answer:

671.22 mi/hr

Explanation:

\((\frac{300 m}{s} )(\frac{1mi}{1609m} )(\frac{3600s}{1hr} )=\frac{(300)(3600)}{1609} =671.22mi/hr\)

Hope this helps

The USDA (United States Department of Agriculture) recommends that fresh pork be cooked until its internal temperature is at least 145°F (63°C). (Option A)

This temperature recommendation applies to all cuts of pork, including pork chops, roasts, and ground pork. This temperature ensures that harmful bacteria, such as salmonella and E. coli, are destroyed and that the pork is safe to eat.

It is important to use a meat thermometer to accurately measure the internal temperature of the pork and to check several places to ensure that the entire piece of meat has reached the recommended temperature. Letting the pork rest for a few minutes after cooking allows the internal temperature to rise by a few degrees and helps to ensure that the meat is fully cooked.

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Answer:

Glucose diffuse from the blood plasma, across the capillary walls to the tissue fluid, and then to the cell.

Glucose diffuse from the blood plasma, across the capillary walls to the tissue fluid, and then to the cell. The waste product urea diffuse from the cells of the liver to the tissue fluid, and then across the capillary walls into the blood plasma.

The time it takes to cross the river is 10 seconds.

We are given the width of the river as 18 meters, the velocity of the boat as 1.8 m/s, and the velocity of the current as 4 m/s.

To cross the river, the boat must travel at an angle to the current, such that the velocity vector of the boat and the velocity vector of the current combine to give the boat a resultant velocity that is perpendicular to the bank. This can be represented using vector addition.The magnitude of the resultant velocity vector is given by:v = sqrt(1.8^2 + 4^2) = 4.32 m/sThe direction of the resultant velocity vector is given by:theta = tan^-1(4/1.8) = 67.4 degrees

The time it takes to cross the river is given by the equation:t = d/vwhere d is the distance across the river and v is the magnitude of the resultant velocity vector. Substituting in the values, we get:t = 18/4.32 = 4.17 seconds

Therefore, it takes 4.17 seconds to cross the river. During this time, the boat is also being carried downstream by the current. The distance downstream that the boat has drifted is given by:d = vtwhere v is the velocity of the current and t is the time taken to cross the river.

Summary: Thus, the time it takes to cross the river is 10 seconds. You have drifted 40 meters downstream when you reach the far shore.

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Answer:

If an object has a fast velocity, the dots on a ticker tape diagram will be far apart.

Answer:

c

Explanation:

mark brainliest of your straight

Answer:

the answer is D

Explanation:

True. When IMC is installed through bored or punched holes in framing members, additional support requirements are not necessary, whether the framing members are made of wood or metal.

The National Electrical Code (NEC) requires that when metal framing is used, the IMC must be secured within 8 inches of each box, outlet, or junction, and it must be supported at least every 10 feet. When wood framing is used, the IMC must be secured within 8 inches of each box, outlet, or junction, and it must be supported at least every 4 1/2 feet. However, this support is intended to keep the pipe from becoming displaced, and not to provide additional support for the pipe.

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We have the next data

vi=initial velocity=34.6 m/s

a=acceleration=-3.5 m/s^2

t=time=3s

we need to find the final velocity (vf)

We will use the next formula

then we substitute the data

then we isolate the vf

the velocity of the car after 3 seconds is 24.4 m/s

Answer:

0.6 ☻︎☻︎☻︎☻︎☻︎☻︎☻︎☻︎☻︎☻︎☻︎

The initial velocity in the horizontal direction will be 28 m/s. Let's use trigonometry to solve the problem. We know that the vertical component of the initial velocity is 23 m/s. Let's call this component "V_y". We need to find the horizontal component of the initial velocity, which we'll call "V_x".We can use the following trigonometric relationship to solve the problem:

tan(theta) = opposite/adjacent; In this case, "theta" is the angle between the initial velocity vector and the horizontal direction. We don't know this angle, but we can use the fact that the vertical component of the initial velocity is given by:

V_y = V_initial * sin(theta); where "V_initial" is the magnitude of the initial velocity. We can solve this equation for "V_initial" and substitute the given values to get:

V_initial = V_y / sin(theta)

Now, we need to find the value of "sin(theta)". We know that: sin(theta) = opposite/hypotenuse

In this case, the opposite side is "V_y" and the hypotenuse is "V_initial". We can use the Pythagorean theorem to find the value of the adjacent side, which we'll call "V_x". The theorem states that:

hypotenuse^2 = opposite^2 + adjacent^2

Substituting the given values, we get:

V_initial^2 = V_y^2 + V_x^2⇒V_x = sqrt(V_initial^2 - V_y^2)

Substituting the values we've calculated, we get:

V_x = sqrt(35^2 - 23^2) = 28 m/s

Therefore, the initial velocity in the horizontal direction is 28 m/s.

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