A cell phone is dropped from a second story window that is 8.5344 meters high. How long before it hits the ground?

Answer:

Given that

speed u=4*10^6 m/s

electric field E=4*10^3 N/c

distance b/w the plates d=2 cm

basing on the concept of the electrostatices

now we find the acceleration b/w the plates  to find the horizontal distance traveled by the electron when it hits the plate.

acceleration a=qE/m=\(1.6*10^{-19}*4*10^3/9.1*10^{-31} =0.7*10^{15}\)=\(7*10^{14}\) m/s

now we find the horizontal distance traveled by electrons hit the plates

horizontal distance

\(X=u[2y/a]^{1/2}\)

=\(4*10^6[2*2*10^{-2}/7*10^{14}]^{1/2}\)

=\(3*10^{-2}\)= 3 cm

The spaceship would move a distance of 688 meters between t = 4s and t = 8s.

To calculate the distance traveled by the spaceship between t = 4s and t = 8s, we need to consider the average velocity over that time interval. Average velocity is defined as the total displacement divided by the total time.

Given that the spaceship is traveling with a uniform velocity, we can assume that the velocity remains constant throughout the entire interval.

The initial velocity at t = 0s is 75m/s, and the final velocity at t = 12s is 269m/s. The time interval we're interested in is 4s to 8s.

To calculate the average velocity, we sum the initial and final velocities and divide by 2:

Average velocity = (Initial velocity + Final velocity) / 2

Average velocity = (75m/s + 269m/s) / 2

Average velocity = 172m/s

Now, to find the distance traveled, we multiply the average velocity by the time interval:

Distance = Average velocity * Time interval

Distance = 172m/s * (8s - 4s)

Distance = 172m/s * 4s

Distance = 688m

Therefore, the spaceship would move a distance of 688 meters between t = 4s and t = 8s.

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Explanation:

In other to avoid a situation where their differences, pride, and personalities caused them to compete and publicly insult one another instead of working together they need to respectfully consider the viewpoints of each other, as well as assign individual roles that should be respected.

Answer:

When you in a airplane you are in high altitude and thats where air density drops. Thats where ear pops come from.

Explanation:

The kind of force that significantly cause an object to accelerate is known as unbalanced force. Thus, the correct option for this question is C.

Force may be defined as a type of physical characteristic that stimulates the pushing and pulling of an object. It is significantly caused by the interaction of one object with respect to another. It is a vector quantity and it has both magnitude and direction.

According to the famous scientist, Newton, an object will only accelerate if it possesses a net or unbalanced force. The presence of an unbalanced force will definitely produce an object to move in a specific direction. According to him, acceleration changes its speed, its direction, or both its speed and direction.

Therefore, the kind of force that significantly cause an object to accelerate is known as unbalanced force. Thus, the correct option for this question is C.

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Answer:

A) 464m/s

B)185m/s

C)345m/s

Answer:

C: Smoke rises out of very hot substances

Explanation:

Edge

Answer:

It's D.

Explanation:

With a mechanical advantage of 6.7 and an input force of 120 pounds, the inclined plane can move a weight of approximately 804 pounds.

The mechanical advantage of an inclined plane is calculated by dividing the length of the plane by its height. In this case, since the mechanical advantage is given as 6.7, it means that for every 6.7 units of length along the inclined plane, there is a unit of height.

To determine the weight that can be moved, we need to consider the relationship between the input force and the weight. The weight that can be moved is equal to the product of the input force and the mechanical advantage.

In this scenario, the input force is 120 pounds, and the mechanical advantage is 6.7. Multiplying these values together gives us approximately 804 pounds. Therefore, with an input force of 120 pounds, the inclined plane can move a weight of around 804 pounds.

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Answer:

75ohms

Explanation:

V= IR

V = 1.5volts

I = 0.02A

1.5 = 0.02×R

Making R the subject

R = 1.5/0.02

R = 75ohms

The resistance in the circuit will be 75ohms

The capacitors are connected, each capacitor has a charge of Qdc=6C. The capacitors' capacitances are C1=1.0F and C2=2.0F, and the source's emf is equal to 10V. The potential difference between A and B is 5.0V.

You add each of the capacitances using the method below to determine the total can be of the a number more capacitors joined in this way: CTotal Equals C1 Plus C2 + C3, etc. Example: to determine the combined capacitance of these three parallel capacitors.

C1 and C2 serve as coupling capacitors primarily, letting AC signals travel while block DC at the inputs and outputs in order to prevent voltages from earlier or later circuits from upsetting the biased condition for the this amplifier.

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The statement "the electromotive force has units of newtons (n)." is false because  the electromotive force is a fundamental concept in electrical circuits, and it is measured in volts, not newtons.

The electromotive force, also known as EMF, does not have units of newtons (N). Instead, it is measured in volts (V).

EMF is the force that causes electric charges to move through a circuit. It is the energy that is supplied by a source, such as a battery or generator, to move electrons from a low potential point to a high potential point. The EMF is the work done per unit charge in moving an electric charge between two points in a circuit, and its unit is volts.

The relationship between EMF and potential difference (voltage) is that EMF represents the total energy provided by the source per unit charge, while potential difference is the energy required to move a unit charge through the circuit.

Therefore, the EMF and potential difference are related by the equation:

EMF = potential difference + internal resistance.

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Answer:

The Answer is C. The force of gravity

Explanation:

This is because it is the force of gravity exerted or inflicted upon the object or organism. With more gravity inflicting upon an object the heavier it feels. In fact, weight and gravity have such a close relationship that the equation for weight is F = M x A where F represents the objects weight in Newtons, M equals it's mass, and A represents the downward acceleration due to the gravity.

Answer:

The answer is c

Explanation:

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

c. repels magnet

Answer:

Power = 1200 [W].

Explanation:

The efficiency of an electrical equipment is defined as the relationship between the power realized, over the power that is consumed. For this case, they give us the data of consumed power and efficiency in this way we can calculate the power that the equipment performs.

\(Efficency=\frac{Power_{done}}{P_{consumed}}\\0.8 = \frac{Power_{done}}{1500} \\Power_{done}=1500*0.8\\Power_{done} = 1200 [W]\)

This means that of the 1500 [W], 1200 [W] are actually used to get the job done. This is established by means of the first law of thermodynamics.

The equivalent resistance of the series combination is :  3XΩ

Equivalent Resistance is the total resistance in circuit (i.e parallel or series circuits).

Bulb in series have the same resistance. Therefore each Bulb has a resistance of XΩ

equivalent resistance = \(R_{1}\) + \(R_{2}\) + \(R_{3}\)

Let \(R_{1}\) represent resistance of bulb one

\(R_{2}\) represent resistance of bulb two

  \(R_{3}\) represent resistance of bulb three

equivalent resistance = X + X + X

equivalent resistance = 3XΩ

In conclusion, the equivalent resistance of the series combination of Three identical lamps connected in series with each other with a resistance of  X ohms each is 3XΩ

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Answer:

X is frictional force

Explanation:

when X is greater than pushing force,the object won't move

The correct answer for the nature of force at "X" is frictional force.

What is friction force?

Friction or frictional force is the force that acts when two surface comes in contact with each other. When a body A is resting upon a body B, The force that helps the body to maintain the equilibrium position is static friction.

Kinetic friction slows down a moving object, when their is relative   motion between two objects. It always acts in apposite direction to the force applied.

It is denoted by \(F\).

The formula to calculate static friction is \(F = \mu N\)

\(\mu_s =\) Co-efficient of static friction

\(\mu_k =\) Co-efficient of Kinematic friction.

The Force indicated at "X" is "Kinetic friction", It will slow down the moving object.

When "X" is greater than the moving object, the object will stop moving and will remain at rest.

The Force Indicated at "X" is Frictional force.

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Answer:

after 10 seconds,  the car reaches 30m/s and travels 200 m

Explanation:

final velocity = initial velocity + acceleration • time

30 m/s = 10 m/s + 2 m/s/s • time

subtract 10m/s from both sides

20 m/s = 2m/s/s • time

divide each side by 2m/s

10 s = time

d = 1/2 acceleration • time^2 + initial velocity • time

d = 1/2 • 2m/s/s • 10s^2 + 10m/s • 10s

d = 1 • 100m  + 100m

d = 200m

The center of the gravity of the casting is 2.68 ft

Given : a cylindrical cast iron

and let us assume the weight of the whole cylinder to be W₁

And the weight of the empty space be W₂

And the density of both of them are same

So, W₁ = πr² h × 450 pcf

W₁ = 3.14 × 6/12 × 6/12 × 5 ×450

W₁ = 17666.5 lb

W₂ = 3.14 × 3/12 ×3/12 × 3× 450

W₂  = 264.94 lb

And the total that is W = W₁ + W₂

W = 17666.5 + ( - 264.94 )

W = 1502.56 lb

Now we have ,

X bar = summation wy / W

Thus X bar = 2.68 ft

The center of the gravity of the casting is 2.68 ft

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Answer:

Specific latent heat means, the amount of heat energy needed to convert a phase completely to another phase of a unit mass of a substance. Heat capacity is dependent on the amount of substance. Specific heat or specific heat capacity (s) is the heat capacity which is independent of the amount of substances.

Specific Heat Capacity involves temperature change, while Specific Latent Heat is for phase change without temperature change. Both measure energy requirements in different contexts.

Explicit Intensity Limit (SHC) and Explicit Idle Intensity serve unmistakable jobs in portraying substances' warm ways of behaving. SHC alludes to the intensity energy expected to build the temperature of a unit mass by one degree Celsius, mirroring the substance's capacity to store heat during temperature changes.

Then again, Explicit Inactive Intensity relates to the intensity energy expected for a substance to go through a stage progress, like liquefying or vaporization, without changing its temperature. It implies the energy important to defeat intermolecular powers during these progressions in state at a steady temperature.

Generally, SHC is significant while examining temperature varieties and energy stockpiling, while Explicit Idle Intensity becomes critical during stage shifts, where substances retain or deliver energy to progress between strong, fluid, or vaporous states while keeping a consistent temperature.

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Two solid spheres with identical charge imbalance of 2 C have radii of 5 cm each. A is an excellent conductor, or sphere A. As an insulator, sphere B's charge is dispersed evenly throughout its volume.

A charge is what?

the sum of money required to purchase something, particularly a service: levy/impose/experience a fee You will be charged if you don't cancel the reservation within the allotted time. the cost of sb/sth Do kids pay anything or are they admitted free minimal or modest charge For this service, we charge a small fee.

What does charge mean in physics and chemistry?

August 8, 2017 update. Charge often refers to electric charge in chemistry and physics, which is a conserved feature of some subatomic particles that governs their electromagnetic interaction. An electromagnetic field exerts a force on matter as a result of the physical attribute of charge.

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Answer: Explanation:

A number used to multiply a variable. Example: 6z means 6 times z, and "z" is a variable, so 6 is a coefficient. ... Example: In ax^2 + bx + c, "x" is a variable, and "a" and "b" are coefficients.

449.63 mA current i must flow through the wire in order that the wire accelerate neither upwards nor downwards.

Electrical charge carriers, such as electrons, flow as current. From negative to good elements, current flows. The ampere is the SI unit used to measure electric current (A). One coulomb of electrical charge moving across a certain place in one second is referred to as a single ampere of current.

Length of the wire, L = 0.6 m

Mass of the wire length, m = 11 g

                                            = 11 * 10⁻³ kg

Magnetic field , B = 0.4 T

Know we know that :

ILB = mg

or I= mg/BL

I = (11 * 10⁻³)(9.81)/(0.4)(0.6)

I = 0.4496 A

I = 449.63 mA

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The complete question is -

A wire 0.6 m long and with mass m = 11 g is positioned horizontally near the earth's surface and perpendicular to a horizontal magnetic field of magnitude B = 0.4 T. What current I must flow through the wire in order that the wire accelerate neither upwards nor downwards? The magnetic field is directed into the page.

Complete Question

Q. Two go-carts, A and B, race each other around a 1.0km track. Go-cart A travels at a constant speed of 20m/s. Go-cart B accelerates uniformly from rest at a rate of 0.333m/s^2. Which go-cart wins the race and by how much time?

Answer:

Go-cart A is faster

Explanation:

From the question we are told that

       The length of the track is \(l = 1.0 \ km = 1000 \ m\)

       The speed of  A is  \(v__{A}} = 20 \ m/s\)

       The uniform acceleration of  B is  \(a__{B}} = 0.333 \ m/s^2\)

  Generally the time taken by go-cart  A is mathematically represented as

              \(t__{A}} = \frac{l}{v__{A}}}\)

=>          \(t__{A}} = \frac{1000}{20}\)

=>           \(t__{A}} = 50 \ s\)

  Generally from kinematic equation we can evaluate the time taken by go-cart B as

             \(l = ut__{B}} + \frac{1}{2} a__{B}} * t__{B}}^2\)

given that go-cart B starts from rest  u =  0 m/s

So

            \(1000 = 0 *t__{B}} + \frac{1}{2} * 0.333 * t__{B}}^2\)

=>         \(1000 = 0 *t__{B}} + \frac{1}{2} 0.333 * t__{B}}^2\)            

=>         \(t__{B}} = 77.5 \ seconds\)  

Comparing  \(t__{A}} \ and \ t__{B}}\)  we see that \(t__{A}}\) is smaller so go-cart A is  faster

Answer:

0

Explanation:

The displacement is zero since it goes in a full circle and ends up where it started.

Answer: Centrifugal Force

Explanation:

The force that pulls out from the center on a body in circular motion is called centrifugal force and it increases with acceleration. Centrifugal force results in strong outward pull on your vehicle.

3 electrical equipments consider for this circuit diagram are,

1. Ammeter

2. Resistance

3. Resistance

The circuit diagram with 6 lamps and 3 electrical equipments and 1 power source with open circuit form is represented as,

At the bottom of the journey, the passengers will be travelling at a speed of approximately 39.2 m/s.

Acceleration is the rate of change of an object's velocity over time. It is a vector quantity, meaning it has both magnitude and direction. Acceleration is usually denoted by the letter a in equations. It is the second derivative of position with respect to time, or the rate of change of velocity. Acceleration describes how quickly an object's speed changes with time. Acceleration can involve either an increase or decrease in speed, and it can involve either a change in direction or no change in direction.

This is because the velocity of a free falling object is equal to the square root of two times the acceleration of gravity times the height from which the object is dropped.
In this case, the height is 33.5 m, and the acceleration of gravity is 9.8 m/s2.
Therefore, the velocity at the bottom of the journey is equal to the square root of two times 9.8 m/s2 times 33.5 m, which is equal to 39.2 m/s.

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Each bulb will stay at the same brightness position as before. When a wire is connected between points 1 and 2 the circuit becomes a parallel circuit.

In a parallel circuit, the voltage across each bulb remains the same, and each bulb will remain at the same brightness position as before. The wire was connected assuming that the voltage supplied to the circuit remains constant. The overall resistance in the circuit will drop due to the added wire, so the total current supplied by the voltage source will increase.

This increased current will be divided between the bulb so each bulb will admit a slightly advanced current than earlier but not enough to create a noticeable increase in lightness. thus, each bulb will stay at the same brightness position as before.

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