how is a wave changed by reflection?​

Based on the provided initial velocity; The cliff was approximately 143.1 meters tall., The box fell approximately 54 meters away from the base of the cliff.

To find the height of the cliff, we can use the following kinematic equation for vertical motion:

y = y0 + v0_yt + 0.5a_y*t⁻².

where:

y = final vertical position

y0 = initial vertical position (0, since we start from the top of the cliff)

v0_y = initial vertical velocity (0, since the box is shoved horizontally)

a_y = vertical acceleration (9.81 m/s², due to gravity)

t = time (5.4 seconds)

Plugging in the values, we get:

y = 0 + 05.4 + 0.59.815.4²

y = 0.59.8129.16

y = 4.90529.16

y = 143.1 m

To find how far away the box fell from the base of the cliff, we can use the following equation for horizontal motion:

x = x0 + v0_x*t

where:

x = final horizontal position

x0 = initial horizontal position (0, since we start from the edge of the cliff)

v0_x = initial horizontal velocity (10 m/s)

t = time (5.4 seconds)

Plugging in the values, we get:

x = 0 + 10*5.4

x = 54 m

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Answer:

Answer:

Positive work

Explanation:

When work and the exerted force are in the same direction, then the work done is positive.

In the question, we understand that Marvin lifts a box up (i.e. over his head). The force to lift the box acts in the upward direction and the work done itself is also in the upward direction (from the floor to Marvin's head).

Since these two are in the same direction, then we can conclude that the work done is positive.

Answer:

44 ohms.

Explanation:

R for V (according to Ohm's law). This second formula is more frequently used in practice to calculate resistive heating, whereas the first formula has other, more general applications. As we might infer from the equation, the units of watts also correspond to amperes2 x ohms (A2 x Ω).

Answer:

The reason is because the pressure of the air inside the room drops with time which makes opening the door to require an increased amount of force to make up for the reduced pressure inside the room

Explanation:

From the kinetic theory of gases we have the following relation;

\(v_{rms} = \sqrt{\dfrac{3 \cdot K \cdot T}{m} }\)

\(p = \dfrac{n \cdot MW \cdot v^2_{rms} }{3 \cdot V}\)

Where:

K = Boltzmann constant

T = Temperature

m = Mass

MW = Molecular weight

V = Volume

\(v_{rms}\) = Root mean square velocity

Whereby the room door is closed, the kinetic energy of the air particles will be used up such that the average velocity of the particles will decrease, given that the volume of the room is constant, the pressure inside the room will drop below the original pressure outside the room such that the force on the door due to the outside pressure is larger than the force on the door from inside the room requiring a larger amount of force to overcome the resistance of the now higher outside pressure force.

Answer:

The Answer is A

Explanation:

Which scenario describes a transformation of thermal energy into chemical energy? You turn on the heater in your car. The UV light from the Sun causes a sunburn. The Sun's energy causes you to sweat.

Answer:

Density= 2.78 g/cm³

Relative density=2.8

Explanation:

To calculate the density of the cube we have to use the formula ρ=mass/volume

ρ stands for density.

So now we don't have the volume of the cube and to find the volume of the cube we have to use the formula a³

3³= 9 cm³

Now plug in the values. ρ= 25 g/9 cm³

ρ= 2.78 g/cm³

To find the relative density, we have to use the formula ρsample/ρH20

The sample means the density of the substance earlier. We do not know the density of water but it is constant at 997 kg/m³.

Now we have to make the units same so you change the unit of the density of cube to kg/m³

So, 25/1000= 0.025 kg

9/100×100×100 (because cm³ which means that there should be 3 meters to change the unit and to conver cm to meter we need to divide by 100 so 9cm/100, 9cm²/100×100, 9cm³/100×100×100)

=0.000009 m³

The new density= 0.025 kg/ 0.000009 m³

= 2777.78 kg/m³

Now plug the values into the formula:

relative density= 2.777.78 kg/m³ / 997 kg/m³

=2.8

There is no unit since kg/m³ and kg/m³ cancels

Two digital input sensors that can be connected to the digital inputs internal sub-system of a micro-controller unit (MCU) are push buttons and switches. Push buttons are momentary switches that provide a digital signal when pressed, while switches provide a constant digital signal until they are toggled.

These sensors can be connected to the MCU's digital inputs through appropriate interface circuits or directly if the sensor output levels are compatible with the MCU's input voltage levels.

Once connected, the MCU can read the digital signals from these sensors and use them for various purposes such as detecting user input, monitoring the state of a system, or triggering specific actions in the program.

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Answer:

105

Explanation:

Answer:

100kg

Explanation:

use the 1/2mv^2 formula to find the mass

Answer:

hypotenuse = 21.6cm

Explanation:

I have attached photo with working.

Explanation:

a) The displacement is the area under the curve.

Δx = ½ (10 s) (20 m/s) + (20 s) (20 m/s) + ½ (10 s) (20 m/s)

Δx = 600 m

b) The car is accelerating when the velocity is changing.  This happens between t = 0 and t = 10, and between t = 30 and t = 40.

c) Average speed = displacement / time

v_avg = 600 m / 40 s

v_avg = 15 m/s

Answer:

Answer:

Earthquakes are likely to occur along the San Andreas Fault.

Explanation:

Answer:

false

Explanation:

From the calculation and based on the Pythagoras theorem, the monkey will climb 4.5 m.

The Pythagoras theorem is based on the sides of the right angled triangle. It states that the square of the longest side is equal to the square of the other two sides.

Thus;

c= √3^2 + 3.4^2

c = 4.5 m

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The power of the lens is 2 diopter means that this lens has a focal length of 1/2 meter.

The focal length = 1 ÷ ( the number of diopters)

If one's glass prescription shows that the power of the lens is 2 diopter it means that the person is far-sighted. It means if a person needs to see something which is quite distant then his eyes need extra lens power to focus on it. Moreover, if there's a sign convention it means '+' indicates a convex lens and '-' concave lens. Also in-camera close up lens are also measured in terms of diopter.

I hope this answer helps.

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Answer:

735 N

Explanation:

Explanation:

Given that,

Mass of metal, m = 0.871 g

Heat, Q = 1.47 J

The temperature increases from 25.2°C to 38.3°C. We know that, heat released is given by :

\(Q=mc\Delta T\\\\c=\dfrac{Q}{m\Delta T}\\\\c=\dfrac{1.47}{0.871\times (38.3-25.2)}\\\\c=0.128\ J/g^{\circ} C\)

Hence, the metal is made up of gold.

Answer:

D.)

Explanation:

the current separates on each branch according to the resistance it experience.

Answer:D

Explanation:

The mass of stone blocks on a sled to build a pyramid is 8960 kg and it needs 14400 N of force to move.

With the aid of the following formula, the maximum amount of friction force that a surface can exert on an item can be quickly determined:

Fnorm = ω *Ffrict

Fnormal = 0.8 * 14000 N

Therefore, F normal = 11200 N

The support force that is applied to an object when it comes into touch with another stable object is known as the normal force. Most of the time, the following formula can be used to easily describe the normal force:

N = mg

Here, N is the normal force we calculated above

Now, substituting the value of force normal , and gravitational acceleration = 9.8 \(m/s^{2}\) into the equation

11520 N= m * 9.8

m = 11200/9.8

m = 8960 kg

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The temperature parameter has the most influence in changing air pressure.

The reason for this is that air molecules expand when heated and compress when cooled. When air molecules are heated, they gain energy and begin to move more rapidly. This increased movement causes the molecules to collide with each other more frequently, creating more force and pressure. On the other hand, when air molecules are cooled, they lose energy and begin to move more slowly.

This decreased movement causes the molecules to collide with each other less frequently, creating less force and pressure. Thus, the temperature parameter has a direct impact on air pressure by changing the speed and frequency of air molecule collisions.

The temperature parameter has the most influence in changing air pressure because air pressure is caused by the force exerted by air molecules colliding with each other and with surfaces. When the temperature of air changes, the speed and frequency of air molecule collisions also change, which in turn affects air pressure.

Temperature changes can be caused by many factors, including changes in solar radiation, humidity, and altitude. For example, on a hot summer day, the sun heats the air near the ground, causing the air to rise and creating an area of low pressure. This low pressure system then draws in cooler air from surrounding areas, which can lead to thunderstorms and other weather phenomena.

The temperature parameter has the most influence on air pressure because it directly affects the speed and frequency of air molecule collisions, which are the fundamental cause of air pressure.

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The required lowest temperature among the given options will be 270 K. Correct option is B.

In the given problem, the values are given in different systems of temperature measurement. To determine that which one is smaller, first let us convert them into Celsius, so that all the units are in one system.

The relation between Fahrenheit and Celsius is,

Temperature in celsius = 5/9(temperature in Fahrenheit - 32)

Temperature in celsius = 5/9(32 - 32) = 0 Celsius

The relation between Kelvin and Celsius is given as,

Temperature in Celsius = Temperature in Kelvin - 273.15

Temperature in Celsius = 270 - 273.15 = -3.15 Celsius

273 K will be equal to 0 Celsius using above relation.

Hence, all the values are equal to zero except 270 K which is negative, hence it is the coldest. Best choice is B.

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The  Energy of the a high-energy neutron  be 940.51 MeV.

Speed is distance travelled by the object per unit time. Due to having no direction and only having magnitude, speed is a scalar quantity With SI unit meter/second.

Mass of neutron: m₀ = 939.6 MeV/c².

a high-energy neutron is travelling at a speed of 18 million m/s

v = 1.8 × 10⁷ m/s.

Hence, Energy of the neutron be  = m₀c²/√(1- v²/c²) = 940.51 MeV.

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Answer: 1.Hotel/Motel Clerk 2.Hotel/Motel Supervisor or Manager  3.Housekeeper/Cleaning Worker 4.Concierge  5.Porter/Bellhop

A successfully professionalized field of employment is referred to as a profession.

It can be characterized as a disciplined team of people, professionals, who uphold ethical standards, present themselves as, and are recognized by the public as possessing, special knowledge and skills in a widely acknowledged body of learning derived from research, education, and training at a high level, and who are prepared to apply this knowledge and exercise these skills in the interest of others.

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Answer:

In a tug of war, the forces applied by the two people on the rope must be equal in magnitude but opposite in direction. Therefore, if one person has twice the mass of the other, the person with the larger mass will experience twice the acceleration of the person with the smaller mass.

If the heavier person has twice the mass of the lighter person, and the two people meet after a brief time, it follows that the heavier person will have traveled twice as far as the lighter person. Since the rope is 12 meters long, and the two people meet at the center of the rope, the lighter person will have traveled half the length of the rope, or 12 / 2 = 6 meters. Therefore, the heavier person will have traveled twice this distance, or 2 * 6 = <<2*6=12>>12 meters.

Since the heavier person started from the same position as the lighter person, the distance that the heavier person slid is equal to half the total distance traveled, or 12 / 2 = <<12/2=6>>6 meters. Therefore, the correct answer is (A) 6 meters.

The acceleration due to gravity at a distance r = 2RM from the center of Mars will be 0.933 m/s².

What is acceleration?

In mechanics, acceleration is the rate of change of an object's velocity with respect to time. Acceleration is a vector quantity (as long as it has magnitude and direction). The direction of an object's acceleration is given by the direction of the net force acting on that object. As described by Newton's second law, the magnitude of an object's acceleration is the combined effect of two causes. ) The mass of this object is inversely proportional to the mass of the object, depending on the material the object was made from.

The SI unit of acceleration is meters per second square.

Therefore, The acceleration due to gravity at a distance r = 2RM from the center of Mars will be 0.933 m/s².

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Answer:

one fourth of accelerattion, its obvious

Explanation:

A specific net force is applied to an object, and it causes a certain acceleration. If the same net force is applied to a new object with four times the mass, the acceleration of the more massive object would be one-fourth of the initial acceleration.

Newton's Second Law states that The resultant force acting on an object is proportional to the rate of change of momentum.

The mathematical expression for Newton's second law is as follows

F = m × a

As given in the problem statement if a specific net force is applied to an object, it causes a certain acceleration. If the same net force is applied to a new object with four times the mass,

Since the force is the same and the mass is four times the initial mass, the acceleration would be one-fourth of the initial acceleration.

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The expected loss is $3,000.

The expected loss can be calculated by multiplying the probability of incurring a loss by the amount of the loss.

In this case, the probability of incurring a loss of $10 million is 0.03 percent, which can be expressed as 0.0003 in decimal form. The loss amount is $10 million.

Expected Loss = Probability of Loss × Loss Amount

Expected Loss = 0.0003 × $10,000,000

Expected Loss = $3,000

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