Corbin, an avid skier leaves the horizontal end of a ramp with a velocity of 33.0 m/s and lands 63.0 m from the base the ramp. How high is the end of the ramp from the ground?

its dddddddddddddddddddddddd

During convection, Warm fluid rises & cool fluid sinks (C).

Answer is C- warm fluid rises and cool fluid sinks.

Convection occurs when particles with a lot of heat energy in a liquid or gas move and take the place of particles with less heat energy. Convection process takes place through advection or diffusion.

As per the question the initial speed of the car [ u] is 42 m/s.

The car applied its brake and comes to rest after 5.5 second.

The final velocity [v] of the car will be zero.

From the equation of kinematics we know that

                                         [tex]v=u+at[/tex] [ here a stands for acceleration]

                                         [tex]0=42 +5.5a[/tex]

                                         [tex]a =\frac{-42}{5.5} m/s^2[/tex]

                                          [tex]a= -7.64 m/s^2[/tex]

Here a is taken negative as it the car is decelerating uniformly.

We are asked to calculate the stopping distance .

From equation of kinematics we know that

                                              [tex]S=ut+\frac{1}{2} at^2[/tex]  [here S is the distance]

                                                      [tex]= 42*5.5 +\frac{1}{2} [-7.64] [5.5]^2 m[/tex]

                                                       [tex]=115.445 m[/tex]      [ans]  

The racing car, decelerating at a uniform -7.64 m/s², travels 115.5 meters during the braking process over 5.5 seconds.

To find the distance a car travels during braking from a certain speed, you can use a physics formula for motion which states that displacement (distance) = Initial velocity * time + 0.5 * acceleration * time squared. As the car is slowing down, the acceleration will be negative. Hence, we have:

Initial speed u = 42 m/s

Final speed v = 0 m/s (as the car comes to rest)

Time t = 5.5 s

Using the first equation of motion to find acceleration a, v = u + at, thus, a = (v-u)/t = (0 - 42)/5.5 resulted in a = -7.64 m/s².

Now, by using the formula of motion s = ut + 0.5at², the distance can be calculated as follows: s = (42m/s * 5.5s) + 0.5 * -7.64 m/s² * (5.5s)², which results to s = 115.5m. Therefore, the car travels a distance of 115.5 meters while braking.

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Given:

u(initial velocity): 154 m/s

accelerates (a): 1.8 m/s^2

t= 1 min=60 secs

Now we know that

s= ut  + 1/2(at^2)

s= 154 x 60 + (1.8 × 60 ×60) ÷ 2

s= 12,480 m

The answer is: reduce the flow of heat passing through the window.

A double glazing window or insulating glass consists of two glass window panes separated by a spacer bar and seals to create a hermetically-sealed environment. Space between glass panes is filled under vacuum with either dehydrated air or an inert gas to improve insulation and prevent condensation within the unit. The physical properties of the dehydrated air used in the space between glass panes mean that it transmits less heat than normal air, this is because the molecules of dehydrated air are relatively inert and therefore have a lower thermal conductivity.

The air sealed between two panes of glass in some windows helps to reduce the flow of heat passing through the window.  Even though the windows are more expensive to build, that little bit of trapped air in there is a very effective INSULATION.  It makes the house easier to keep warm in Winter, and easier to keep cool on Summer, and both of those save on the cost of gas or electricity for the house.

A

Energy = Power × time

            = 400 × 5 = 2000 J

In 5 seconds, the toaster uses 2000 joules (J). The Choice (A) 2000J is the best one.

Given:

Power of the toaster (P) = 400 W

Time (t) = 5 seconds

The quantity of work completed or the entire amount of power used over a specific time period is referred to as energy (E). In the International System of Units (SI), it is expressed in joules (J). The energy calculation formula is as follows:

For the energy used by the toaster in 5 seconds,

Energy (E) = Power (P) × Time (t)

E = 400× 5

E = 2000 joules (J)

Therefore, the toaster uses 2000 joules (J) of energy in 5 seconds. The correct answer is A. 2000 J.

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Mr. Mendoza is using the hand pump to model the transistor's use as a switch to turn on a large current using a small current.  

If my teacher had used this model (around 1972) to illustrate the concept, I don't think I would have absorbed the idea.  I was substantially clueless, and the model is pretty abstruse.

Mr. Mendoza using the hand pump to model to use it as a switch to turn on a large current using a small current. Hence option C is correct.

The definition of the Transistor is in name itself, it is the transfer of resistance. it has three terminals collector, base and emitter. Emitter is highly immured which emits the charge charrier. Collector is moderately immured which collects charge carrier and Base which is lightly immured which biases the charge carrier. It is connected in common base, common emitter and common collector mode. Common emitter mode is widely used for amplification and switch purpose.

To use transistor as a switch emitter is grounded and collector is at positive potential. When voltage at the base exceed the cut off voltage(0.7 V for silicon), it drives the current from collector to emitter and whatever instrument is connected to it gets on.

In the picture of the hand pump, tap works as emitter, inlet of the handpump work as collector and handle of the pump work as base which drives the water. Motion in the handled of handpump produces flow of water from ground to tap. it is used as switch.

Hence option C is correct.

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Speed of the TRAX is given as 16 m/s so let say it is given as

[tex]v_t = 16 m/s[/tex]

now our speed towards the front end is given by 5 m/s so this is the relative speed of us with respect to TRAX

let say this speed is given as

[tex]v_1t = 5 m/s[/tex]

now we need to find the speed with respect to someone standing outside the TRAX

so here we need to find the net speed in ground frame and hence we can use the formula of relative speed

[tex]v_{1t} = v_1 - v_t[/tex]

[tex]v_1 = v_{1t} + v_t[/tex]

[tex]v_1 = 5 + 16[/tex]

[tex]v_1 = 21 m/s[/tex]

so someone outside the TRAX will see our speed as 21 m/s

Answer:

1. Rovers- These are vehicles which are designed to move on the surface on any celestial body and collect samples, data and images. Sometimes, these can be used to transport mission crew members.

2. Orbiters- These are spacecrafts designed to orbit any celestial body and collect data in form of images.

3. satellites- artificial satellites are placed in the orbit of celestial bodies for various purposes. There are various types of satellites like communication satellite, weather satellites, space telescopes. These collect images and data inform of signals.

4. space stations: It is a satellite where research and experiments take place. Images are also collected for research purpose.

Space shuttle is a wrong option because it is just a vehicle to transport these satellites and probes into the space and place in the orbit or surface of celestial body.

Answer:

rovers

satellites

space stations

Explanation:

i just took the test

Given:

u(initial velocity)=0

a=5.54m/s^2

v(final velocity)=2 m/s

v=u +at

Where v is the final velocity.

u is the initial velocity

a is the acceleration.

t is the time

2=0+5.54t

t=2/5.54

t=0.36 sec

Using the formula for acceleration, we find that the time it would take the box to reach the speed of 2.0 m/s under an acceleration of 5.54 m/s^2 is approximately 0.36 seconds.

To find out the time t it would take the box to reach the speed of 2.0 m/s under an acceleration of 5.54 m/s2, you would use the formula for acceleration, which is acceleration = change in speed / time. Solving this formula for time gives time = change in speed / acceleration.

Plugging the given values into this formula, we get time = 2.0 m/s / 5.54 m/s2. Calculating this gives a time of approximately 0.36 seconds.

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The answer:

the field lines of the magnetosphere farther apart on the side of Earth facing away from the sun Because of the solar wind (the corona) which is released from the upper atmosphere of the Sun. it is a stream of charged particles.This plasma consists of alpha particles electrons, and protons. And has a kinetic energy between 0.5 and 10 keV. This solar wind which is ionized is distorting the Earth's field so this affected the field lines of the magnetosphere farther apart on the side of Earth facing away from the sun.

Around 48 % of the incoming solar energy passes through the atmospheric layer of the earth. The water vapor,ozone and dust present in the atmosphere absorbs 23 percent of incoming solar energy .Thus about 71% of the incoming solar radiation is absorbed by the earth. The rest 29% of the incoming solar radiation is reflected back into the space.

C) 9 kilogram meters/second

Explanation:

The impulse is defined as the integral of the force over the time:

[tex]J=\int F dt[/tex]

in a force-time graph, the impulse corresponds to the area under the curve. Therefore, in this case we can calculate the impulse by finding the area of the triangle.

The base is 3 s, while the height is 6 N, therefore the area (and the impulse) is

[tex]J=\frac{(3 s)(6 N)}{2}=9 kg m/s[/tex]

Answer:

C) 9 kilogram meters/second

Explanation:

Correct answer on plato/edmentum

You draw 3 circles around the stations with the size of the circle equal to the distance from the earthquake. Then you simply find where the edge circles all overlap.

i believe your looking for this word ?? "fundamental".

Answer:

Fundamental frequency

Explanation:

Fundamental frequency is the lowest frequency which produced due to the oscillation of the body. This frequency is different from other higher frequencies.  If the tube is closed at one end, the velocity of sound divided by 4 times the length of the tube gives the fundamental frequency. The higher frequencies can be obtained by integral multiple of the fundamental frequency.

The magnitude of electrical force between them is about 7.52 × 10⁻¹¹ Newton

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Electric charge consists of two types i.e. positively electric charge and negatively electric charge.

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There was a famous scientist who investigated about this charges. His name is Coulomb and succeeded in formulating the force of attraction or repulsion between two charges i.e. :

[tex]\large {\boxed {F = k \frac{Q_1Q_2}{R^2} } }[/tex]

F = electric force (N)

k = electric constant (N m² / C²)

q = electric charge (C)

r = distance between charges (m)

The value of k in a vacuum = 9 x 10⁹ (N m² / C²)

Let's tackle the problem now !

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Given:

charge of proton = q₁ = 1.6 × 10⁻¹⁹ C

charge of electron = q₂ = 1.6 × 10⁻¹⁹ C

distance between proton and electron = R = 1.75 nm = 1.75 × 10⁻⁹ m

Unknown:

electrical force between them = F = ?

Solution:

[tex]F = k \frac{q_1 q_2}{R^2}[/tex]

[tex]F = 9 \times 10^9 \times \frac{ 1.6 \times 10^{-19} \times 1.6 \times 10^{-19} }{ ( 1.75 \times 10^{-9} )^2 }[/tex]

[tex]F = 9 \times 10^9 \times \frac{ 2.56 \times 10^{-38} }{ 3.0625 \times 10^{-18} }[/tex]

[tex]F \approx 7.52 \times 10^{-11} \texttt { Newton}[/tex]

[tex]\texttt{ }[/tex]

[tex]\texttt{ }[/tex]

Grade: High School

Subject: Physics

Chapter: Static Electricity

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Keywords: Series , Parallel , Measurement , Absolute , Error , Combination , Resistor , Resistance , Ohm , Charge , Small , Forces

Let the Fugitive catch the empty box after "t" s of time

So the distance moved by train in same time will be

[tex]d = 5.5*t[/tex]

Now in the same way distance moved by fugitive who is accelerating with a = 4.2 m/s^2 to his maximum speed v = 8 m/s

SO the time taken by him to reach maximum speed

[tex]vf = vi + at[/tex]

[tex]8 = 0 + 4.2*t[/tex]

[tex]t = 1.9 s[/tex]

distance moved by fugitive in t = 1.9 s

[tex]d = vi* t + \frac{1}{2}at^2[/tex]

[tex]d = 0 + \frac{1}{2}*4.2* 1.9^2[/tex]

[tex]d = 7.62 m[/tex]

So in 1.9 s the train will move more than 7.62 m so it will definitely catch the train after this

distance moved by fugitive in time "t" = distance moved by train in same time

Let say it will catch the train after t = 1.9 s so after that time it will move to his constant speed of 8 m/s

[tex]7.62 + 8 * (t - 1.9) = 5.5 * t[/tex]

[tex]8*t - 5.5*t = 8*1.9 - 7.62[/tex]

[tex]2.5*t = 7.58[/tex]

[tex]t = 3.03 s[/tex]

So it will take 3.03 s to catch the train

Part B)

Distance traveled by fugitive in same time

[tex]d = 7.62 + 8*(t - 1.9)[/tex]

here it is because the fugitive will accelerate to reach at his maximum speed of 8 m/s till 1.9 s and cover a total distance of 7.62 m and after that it will move at his maximum speed for rest of the time.

[tex]d = 7.62 + 8*(3.03 - 1.9)[/tex]

[tex]d = 16.67 m[/tex]

so it will move a distance of 16.67 m

The results of the controlled experiment refute the claims of the company.

Answer:

The results of the controlled experiment refute the claims of the company.

Explanation:

Did the study island!

The average kinetic energy of a substance is directly proportional to the temperature of that substance.

[tex]Mathematically\ Kinetic\ energy [K.E]\ \alpha\ T[/tex]

Here T is the temperature.

During the process of change of state,the temperature of the system remains constant as long one substance is not converted into another substance. It means that the energy absorbed or released at that time is utilised in changing the state of substance only. As kinetic energy is constant,so gain or loss of energy is attributed to potential energy.

In the given question,the water is converted from solid to liquid. During the melting of ice, heat is given to the ice for converting into liquid. The energy given is called latent heat which is nothing else than the gain of potential energy of water.

Hence water in liquid form has more potential energy than solid ice.

At the melting point, the solid  form of water changes to liquid form. This happens at fixed temperature. During the phase change, the bonds between the molecules break and weakens. This reduces the binding potential energy.  There is no change in the translational kinetic energy which is reflected by the temperature being constant during the phase change. The binding potential energy which reduces is actually utilized in breaking of the molecular bonds which eventually causes the phase change.

Yes, the equation is balanced. There are the same number of Nitrogen (N)  and Hydrogen (H) atoms one each side of the equation.

Hope I helped

B is momentum.  It's a quantity of motion, or "how much stuff is moving"

C is *almost* kinetic energy but it's missing an exponent of 2 on the velocity, v.

D is an amound of work done in moving something a distance d while applying a constant force F.

That leaves A.  This is the potential energy of an object of mass m, in a gravitational acceleration g, at a height h above the reference point (usually the ground)

Answer is A- mgh.

The equation for gravitational potential energy is mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 m/s ∧2 on Earth), and h is the height above the ground in meters.

Gravitational potential energy is defined as the  energy an object possesses due to its position in a gravitational field.

could you please specify?

If the ball, the cliff, and the ground are all on the Earth, and everything is bathed in an ocean of air, then the ball's acceleration will decrease as it falls, because of the friction of air resistance.  If it has far enough to fall, it's possible that its acceleration may even become zero, and the ball settle on a constant speed (called "terminal velocity") before it hits the ground.

But until we get to College-level Physics and Engineering, we ALWAYS ignore that stuff, and assume NO AIR RESISTANCE.  The ball is in FREE FALL, and the ONLY force acting on it is the force of gravity.   We also assume that the distance of the fall is small enough so that the value of gravity is constant over the entire fall.

Under those assumptions, there's nothing present to change the acceleration of the falling ball.  It's 9.81 m/s² when it rolls off the edge of the cliff, and it's 9.81 m/s² when it hits the ground.

Answer: D 1.7 m/s

In order to find the velocity of the person on the walk way with respect to the person on the ground we have to apply relative velocity concept.

Consider the observer on the ground as B and the person walking on the pathway as A.The relative velocity is the velocity that the body A would appear to an observer on the body B and vice versa.

Mathematically speaking the relative velocity is the vector difference between the velocities of two bodies.

Relative velocity = Velocity of Body A- Velocity of Body B.

Velocity of the person walking on the walkway (A)= 1.5 m/s.(given)

Velocity of the observer on the ground (B)= -0.2 m/s(given).

Relative velocity of object A with respect to B = 1.5 - (-0.2)= 1.7 m/s.

Thus the velocity of the person on the walk way with respect to the observers on the ground is 1.7 m/s.

Answer:

FALSE

Explanation:

When object float in water then it means that weight of the object is counterbalanced by the buoyancy force.

Here as we know that buoyancy force is the weight of water displaced by the object.

So here when object is submerged into the water then the submerged part of the volume of object will displace exactly the same volume of water and that volume of water will exert upwards buoyancy force on the object.

So here this statement is not true as it says that volume of water displaced is volume above the surface of water while it must be like volume of water displaced must be equal to volume of submerged part of the object.

Answer: false

Explanation: the volume of water displaced is not equal to the volume of the object because the object is not submerged by the water. So the water displaced is the down trust force exerted on the water by the object

Scientific theories are constantly changing for many reasons. Sometimes it IS because of new evidence. But we would not use the term proven because they ARE always changing! Therefore, the answer is B.

D:Some heat from the iron will move to the water causing both to change temperatures.

The correct stage of role taking according to symbolic interactionism is the play stage.

Symbolic interactionism is a sociological perspective that is influenced by the work of George Herbert Mead. According to Mead, the process of role taking involves several stages through which individuals develop their self-concept and learn to interact with others in society. The stages are as follows:

1. Preparatory Stage (Imitation): In this initial stage, children imitate the behaviors and actions of significant others without fully understanding the roles they are imitating.

2. Play Stage: This is the stage where individuals, often children, begin to imagine and play the role of a significant other. During the play stage, children take on the roles of people in their lives, such as parents, teachers, or other figures, and act out scenarios from their perspective. This imaginative play helps children to understand the roles and expectations of different social positions.

3. Game Stage: In the game stage, individuals start to internalize the generalized other, which represents the organized attitudes of a social group. Here, children learn to consider the expectations of a wider community and how their actions fit into larger social systems. They learn to play games with rules and understand that each role has its own set of expectations and behaviors that are dictated by social norms.

4. Generalized Other: Finally, individuals develop the ability to think from the perspective of the generalized other, which means they can consider the expectations of society as a whole when interacting with others. This stage is crucial for the development of a fully formed self-concept and the ability to engage in complex social interactions.

Thus, the play stage is where individuals begin to imagine and play the role of a significant other, which is essential for the development of empathy, social understanding, and the ability to take on various social roles throughout life.

Answer:

Option B, 11 m is the correct answer.

Explanation:

We have equation of motion ,[tex]s=ut+\frac{1}{2} at^2[/tex] , s is the displacement, u is the initial velocity, a is the acceleration and t is the time.

In this case u = 0 m/s , t = 1.5 seconds , a = acceleration due to gravity = [tex]9.8m/s^2[/tex] , we need to find displacement

Substituting

 [tex]s=0*1.5+\frac{1}{2} *9.8*1.5^2\\ \\ s=11.025m[/tex]  

So option B, 11 m is the correct answer.

Answer:

11

Explanation: