Electromagnetic waves require a medium to transfer energy
True or False

No, they will not be able to clear the hurdle from the given distance of their leap.

What are the projectile motion?

Projectile motion includes vertical and horizontal velocity components. It's important to understand that the two are independent of each other. But what is a projectile and what is a good example. Well, a projectile is an object that is thrown by applying a force that falls under gravity and is subject to the resistance of the medium in which it travels. It can be thrown into the air and fall under the influence of gravity.

First of all the time required to reach the hurdle is:

by using horizontal velocity we have time =

t = 0.100s

Now for the vertical distance covered by student:

S = ut +  gt²

S = 9 × 0.100 +   9.8 × 0.100²

S = 0.851m or 85.1cm

Since the distance calculated is less than the height of hurdles which is 91.4 cm so the student may not be able to clear the hurdle.

Learn more about Projectile Motion from given link

brainly.com/question/11049671

#SPJ4

The speed at the bottom is 10 m/sec.

The speed of an object is the magnitude of the change of its position over time or the magnitude of the change of its position per unit of time; it is thus a scalar quantity.

I have a 10kg crate on top of a ramp that has a 30m long surface and rises 5m in the air. If the μk is .05,

work = change in kinetic energy

mgh = 0.5 mv²

10*10*5 = 0.5 * 10 * v²

v = 10 m/sec

The speed at the bottom is 10 m/sec

To learn more about speed refer to the link:

brainly.com/question/28224010

 #SPJ1

Answer:

Drinking water

Our foods

Washing clothes

Earth rotates on its axis in 1 day. The velocity of a person standing at the equator due to Earth's rotation 463 meters per second.

The velocity of a person standing at the equator due to Earth's rotation can be calculated by considering the circumference of the Earth at the equator and the time it takes for Earth to complete one rotation (which is approximately 24 hours or 86,400 seconds).

The circumference of a circle can be calculated using the formula: C = 2πr, where C is the circumference and r is the radius. For the Earth, the radius at the equator is approximately 6,378 kilometers or 6,378,000 meters.

So, the circumference of the Earth at the equator is:

C = 2π(6,378,000 meters) = 40,075,880 meters (approximately)

Since the Earth completes one rotation in 24 hours or 86,400 seconds, the velocity of a person standing at the equator can be calculated by dividing the distance traveled (circumference) by the time taken:

Velocity = Distance / Time

Velocity = 40,075,880 meters / 86,400 seconds

Calculating this gives us a velocity of approximately 463 meters per second. Therefore, a person standing at the equator is moving with a velocity of approximately 463 meters per second due to Earth's rotation.

Learn more about rotation here:

https://brainly.com/question/17462361

#SPJ11

The letter M surrounded in a circle, which stands for a motor, would be the finest symbol to symbolize an electric fan speed controller in an electrical circuit.

For industrial application, standardized motors offer practical mechanical power. The largest have an output more than 100 megawatts and are used for pumped storage, pipeline compression, and ship propulsion.

To know more about electric fan

https://brainly.com/question/12557984

#SPJ4

Answer:

charge of the atom =  -1

charge of the nucleus = 4

Answer:

The value is \(v_t = 172 \ km/h\)

Explanation:

From the question we are told that

    The average speed for the first 12 hours is \(u = 185 km/h\)

    The average speed for the next 13 hours is  \(v = 160 \ km/h\)

Generally the total time taken is mathematically represented as

     \(t_t = 12 + 13\)

=> \(t_t = 25 \ h\)

The distance covered in the first movement is

          \(D = u * 12\)

         \(D = 185 * 12\)

        \(D = 2220 \ km\)

The distance covered in the first movement is

          \(d= v * 13\)

         \(d = 160 * 13\)

        \(d = 2080 \ km\)

The total distance traveled is  

       \(D_t = D + d\)

       \(D_t = 2220 +2080\)

      \(D_t = 4300 \ km\)

The average  of the whole journey is

      \(v_t = \frac{D_t}{t_t}\)

     \(v_t = \frac{4300}{25}\)

     \(v_t = \frac{4300}{25}\)

    \(v_t = 172 \ km/h\)

The time required for the bacteria concentration to be reduced to 15ppm using the Newton's method is 8.12 hours.

Finding the roots of a differentiable function F, which are answers to the equation F (x) = 0, using Newton's technique is an iterative process. To solve this problem, we can use Newton’s method with an initial guess of t=6 and a stopping criterion of 1% (tol=0.01). The formula for Newton’s method is:

xₙ₊₁ = xₙ - f(xₙ)/f'(xₙ)

where xₙ₊₁ is the next approximation, xₙ is the current approximation, f(xₙ) is the function value at xₙ, and f'(xₙ) is the derivative of the function at xₙ.

For this problem, we have:

f(t) = 77 \(e^{-1.5 t}\) +20 \(e^{-0.08 t}\) - 15

f’(t) = -115.5 \(e^{-1.5 t}\) - 1.6 \(e^{-0.08 t}\)

After using the Newton’s method with an initial guess of t=6 and a stopping criterion of 1% (tol=0.01), the results are as follows:

t = 4.139 hours

You can check your result with fsolve function in Python’s scioy library.

To know more about Newton's method, refer:

https://brainly.com/question/17150870

#SPJ4

The question addresses the stability of the atmosphere and the factors that determine convective stability or instability. It also explains the difference between the adiabatic lapse rate of dry air and wet saturated air.

a) The stability of the atmosphere is determined by the temperature profile and relative densities of the air cell and atmosphere. If the temperature of the surrounding atmosphere decreases with altitude at a rate greater than the adiabatic lapse rate of the air cell, the atmosphere is considered convectively stable.

In this case, the air cell will return to its original position. Conversely, if the temperature of the surrounding atmosphere decreases slower than the adiabatic lapse rate of the air cell, the atmosphere is convectively unstable. The air cell will continue moving in the same direction.

b) The adiabatic lapse rate refers to the rate at which temperature decreases with altitude for a parcel of air lifted or descending adiabatically (without exchanging heat with its surroundings). The adiabatic lapse rate of dry air is higher (around \(9.8^0C\) per kilometer) compared to the adiabatic lapse rate of wet saturated air (around 5°C per kilometer).

This difference arises because when water vapor condenses during the ascent of saturated air, latent heat is released, reducing the rate of temperature decrease. A diagram can illustrate the difference between the two lapse rates, showcasing their respective slopes.

c) When wet unsaturated air rises from the ocean surface, its temperature decreases at a rate equal to the dry adiabatic lapse rate. However, if the ambient lapse rate (temperature decrease with altitude) is higher than the adiabatic lapse rate for dry air, a temperature inversion layer forms at higher altitudes.

In this inversion layer, the temperature increases with altitude instead of decreasing. A schematic diagram can depict the temperature changes of the wet air in comparison to the ambient temperature, showing the inversion layer.

Cumulus clouds form at the altitude where the rising moist air reaches the level of the temperature inversion layer. These clouds are formed due to the condensation of water vapor as the air parcel cools to its dew point temperature.

Learn more about adiabatic lapse rates here:

https://brainly.com/question/30023377

#SPJ11

Answer:

Your answer is given below:

Explanation:

The reason behind circular motion at constant speed is not a natural state of motion is centripetal acceleration acting on it.

Centripetal acceleration is a characteristic of an object's motion along a circular path. Centripetal acceleration applies to any item travelling in a circle with an acceleration vector pointing in the direction of the circle's center.

A natural state of motion is that motion where object moves with constant velocity and no acceleration. As  in circular motion of  an object at constant speed, a constant centripetal acceleration remains, this is not a natural state of motion.

Learn centripetal acceleration here:

https://brainly.com/question/14465119

#SPJ2

Answer:

the Mesosphere

Most meteors burn up in the mesosphere. Unlike the stratosphere, temperatures once again grow colder as you rise up through the mesosphere.

Explanation:

Have a nice day

Answer:

The Mesosphere

Explanation:

It is the coldest layer.

The question is about a block of mass m sliding down an inclined plane and its kinetic energy at the bottom. The correct answer is (C) mgh−Fs.

The following forces are at work on the block as it descends the slope:

1. The gravitational force (mg), which exerts downward pressure vertically.

2. Force that acts perpendicular to the inclination is called the normal force (N).

3. the resistance to the block's motion is caused by the force of kinetic friction (F), which acts perpendicular to the inclination.

As the block slides down the inclined plane, it gains kinetic energy due to the conversion of gravitational potential energy (mgh) into kinetic energy. However, the force of kinetic friction (F) opposes the motion, and therefore, some of the potential energy is lost as work is done against the friction force over the length s of the incline (Fs). So, the net kinetic energy of the block at the bottom of the incline is the initial potential energy minus the energy lost to friction: mgh−Fs.

To know more about the gravitational force, click here;

https://brainly.com/question/29190673

#SPJ11

Answer:4.43 decibels louder for Jordan compared to Malik

Explanation:

To determine how much louder the rocket launch sound will be for Jordan compared to Malik, we need to use the inverse square law. This law states that as you move away from a sound source, the intensity of the sound decreases by the square of the distance. In other words, if you double the distance from a sound source, the intensity decreases to one-fourth of its original level.

Let's assume that the sound produced by SpaceX's new Starship rocket is at a constant intensity and emitted uniformly in all directions. If Jordan is 40% closer to the launch site than Malik, then we can assume that Jordan is at a distance of 0.6x from the launch site, where x is the distance from Malik to the launch site.

Using the inverse square law, we can calculate how much louder the rocket launch sound will be for Jordan compared to Malik:

(intensity at Jordan's location) / (intensity at Malik's location) = (distance from Malik's location)^2 / (distance from Jordan's location)^2

(intensity at Jordan's location) / (intensity at Malik's location) = (x)^2 / (0.6x)^2

(intensity at Jordan's location) / (intensity at Malik's location) = 1 / 0.36

(intensity at Jordan's location) = 2.78 x (intensity at Malik's location)

To convert this ratio of intensities into decibels, we can use the formula:

L = 10 log10 (I/I0)

where L is the sound level in decibels, I is the intensity of the sound, and I0 is a reference intensity of 10^-12 W/m^2.

Assuming that the reference intensity I0 is constant for both locations, we can simplify this formula to:

L = 10 log10 (intensity)

Therefore, the sound level for Jordan compared to Malik can be calculated as:

L = 10 log10 (2.78 x intensity) - 10 log10 (intensity)

L = 10 log10 (2.78)

L = 4.43 dB

Therefore, the rocket launch sound will be approximately 4.43 decibels louder for Jordan compared to Malik.

Take east to be the positive direction. Then the resultant force from adding F₁ and F₂ is

F₁ + F₂ = (-45 N) + 63 N = 18 N

which is positive, so it's directed east.

To this we add a third force F₃ such that the resultant is 12 N pointing west, making it negative, so that

18 N + F₃ = -12 N

F₃ = -30 N

So F₃ has a magnitude of 30 N and points west.

A. Different magmas generated in various places are isolated from one another. This assertion is untrue since magmas can interact with one another and mix.

learn more about Magmas here

https://brainly.com/question/27842671

#SPJ4

Answer:

D. Forces opposing the motion of surfaces in contact with each other

Explanation:

Friction moves in the opposite direction of the object.

Explanation:

i think it will be on the ground

The correct equation is D = E × m, where D represents the maximum amount of new demand-deposit money, E represents the number of excess reserves, and m is the monetary multiplier.

Let's break it down step by step:

1. D represents the maximum amount of new demand-deposit money that can be created by the banking system based on a given amount of excess reserves.
2. E represents the number of excess reserves.
3. m is the monetary multiplier, which represents the multiple by which the money supply can expand through the creation of new demand-deposit money.

The equation D = E × m shows that the maximum amount of new demand-deposit money that can be created (D) is equal to the number of excess reserves (E) multiplied by the monetary multiplier (m).

To understand this better, let's consider an example:
Suppose a bank has $100 million in excess reserves (E) and the money multiplier (m) is 5. Using the equation D = E × m, we can calculate the maximum amount of new demand-deposit money that can be created (D):
D = $100 million × 5 = $500 million

So, in this example, the maximum amount of new demand-deposit money that can be created is $500 million. The correct equation relating D, E, and m is D = E × m.

You can learn more about monetary multipliers at: brainly.com/question/28266252

#SPJ11

The correct statement is D = E × m, If D equals the maximum amount of new demand-deposit money that can be created by the banking system on the basis of any given amount of excess reserves.

The equation D = E × m represents the relationship between the maximum amount of new demand-deposit money (D), the amount of excess reserves (E), and the monetary multiplier (m).

The monetary multiplier is a measure of the potential expansion of the money supply through the lending and deposit creation process in the banking system. It is calculated by dividing the total money supply by the amount of excess reserves held by banks.

By multiplying the amount of excess reserves (E) by the monetary multiplier (m), we can determine the maximum amount of new demand-deposit money that can be created by the banking system (D).

Therefore, D = E × m is the correct expression that represents the relationship between D, E, and m in the context of the maximum expansion of the money supply.

Learn more about banking system: brainly.com/question/27893557

#SPJ11

The diopter for the contact lens is +2.50D, which can be converted to a focal length as follows:f = 1/2.50 = 0.40 meters Substitute the given values in the equation to find the distance of the near point.p = 100/0.40 = 250 cm Therefore, the child's near point is 250 cm away from the child's eyes when wearing a +2.50 D contact lens.

According to the thin lens equation, the lens equation can be used to calculate the distance from an object to its image using the focal length and object distance, as well as the image distance.A mother sees that her child's contact lens prescription is +2.50 D. What is the child's near point, assuming the contact lens is designed to enable the child to see objects 25.0 cm away clearly.The image distance, u', is equal to the near point distance when the object distance is equal to the near point distance. So, we can use the following equation to calculate the distance of the near point:p

= 100/f Where p is the distance to the near point, and f is the lens's power, which is calculated as follows:f

= 1/d Where d is the diopter. The following equation can be used to calculate the diopter of a lens:D

= 1/f.The diopter for the contact lens is +2.50D, which can be converted to a focal length as follows:f

= 1/2.50

= 0.40 meters Substitute the given values in the equation to find the distance of the near point.p

= 100/0.40

= 250 cm Therefore, the child's near point is 250 cm away from the child's eyes when wearing a +2.50 D contact lens.

To know more about equation visit:

https://brainly.com/question/29657983

#SPJ11

The height of the building is 8 meters. to calculate the height, we can use the equation for free fall:

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

where v is the final velocity (4 m/s), u is the initial velocity (0 m/s), a is the acceleration due to gravity (-10 m/s^2), and s is the distance or height.

Rearranging the equation, we get:

\(s = (v^2 - u^2) / (2a)\)

Substituting the given values, we have:

\(s = (4^2 - 0^2) / (2 * -10) = 16 / -20 = -0.8 meters.\)

Since the height cannot be negative, we take the absolute value:

|\(s| = 0.8 meters.\)

Therefore, the height of the building is approximately 0.8 meters or 8 meters.

Learn more about approximately here:

https://brainly.com/question/31695967

#SPJ11

Answer:

the  kinetic energy the bat can give to a ball is 2,025 J.

Explanation:

Given;

mass of the bat, m = 2kg

velocity of the bat, v = 45 m/s

The kinetic energy the bat can give to a ball is calculated as;

\(K.E = \frac{1}{2} mv^2\\\\K.E = \frac{1}{2} \times \ 2 \ \times \ 45^2\\\\K.E = 2,025 \ J\)

Therefore, the  kinetic energy the bat can give to a ball is 2,025 J.

In free-fall motion the velocity is given by the following equation of motion:

Where:

Therefore, the velocity increases linearly with time. This happens if the object encounters no air resistance. In the case that there is air resistance the object will reach a terminal velocity.

In the case of distance, this is given by the following equation:

This means that the distance increases with time following a parabolic function.

Answer:

1.67 amperes

Explanation:

Ohm's law states that at constant temperature, the current flowing in an electrical circuit is directly proportional to the voltage applied across the two points and inversely proportional to the resistance in the electrical circuit.

Mathematically, Ohm's law is given by the formula;

\( V = IR \)  ......equation 1

Where;

Making I the subject of formula, we have;

\( I = \frac {V}{R} \)  .....equation 2

Given the following data;

To find the current flowing through the battery, we would use eqn 2;

\( I = \frac {10}{6} \)  

Current, I = 1.67 amperes

The final temperature of the copper cup is found to be 409.19° K.

The mass of the copper cup is 0.500 Kg and it is at a temperature of 280°K.

A total of 2.5 x 10⁴ J of energy is added to the system.

The final temperature of the system is let us say T.

Now, the change in energy will be given by,

∆Q = mC∆T

Where,

C is the specific capacity of copper.

Putting values,

2.5 x 10⁴ = 0.5 x 387 x(T - 280°)

T = 409.19°K.

So, the final temperature of the copper cup is 409.19°K.

To know more about specific heat, visit,

https://brainly.com/question/21406849

#SPJ4

Answer: a. 1200J b. 600W c. 20m/s

Explanation: W = Fxcos

F = 300, x=4, direction of force is = to direction of object so cos(0) = 1

a) 300*4 = 1200

b) P = W/t

1200/2 = 600W

c) vf^2 = vi^2 + 2ax

vi = 0, x = 4, a= 300/6

vf^2 = 2(50)(4)

vf^2 = 400

vf= 20m/s

Explanation:

On a position vs time graph (x vs t), displacement is the difference in positions (Δx = x₂ − x₁).

On a velocity vs time graph (v vs t), displacement is the area under the graph (Δx = ∫ v dt).

Answer:

Explanation:

The force acting on an object given the mass and acceleration we use the formula

We have

force = 15 × 20

We have the final answer as

Hope this helps you

The distance traveled in the x-direction in the time found in part two is given by:50.5m

1. Find the time the cannonball is in the air when thrown straight upwards.
2. Find the x-component of the velocity.
3. Determine how far the cannonball will travel using the x-component of the velocity and the time found in part one.
When the cannonball is thrown straight upwards, it will eventually come to a stop and then fall back down. To find how long it's in the air, we can use the following equation:
time = (initial_velocity_y) / g
where g is the acceleration due to gravity (approximately 9.81 m/s²).
Using the y-component of velocity found in part one, plug it into the equation to find the time.
where t is the time, vy is the y-component of the velocity and g is the acceleration due to gravity, which is 9.81 m/s2.

Therefore, t = 32.2/9.81 = 3.27 s

The x-component of the velocity is the same as the given initial velocity, 15.5 m/s. Therefore, the distance traveled in the x-direction in the time found in part two is given by:

d = vx * t

where d is the distance and vx is the x-component of the velocity.

Therefore, d = 15.5 * 3.27 = 50.5 m

learn more about velocity Refer: https://brainly.com/question/30559316

#SPJ11