he calculation of kinetic energy uses the formula, KE = 1 2 mv2. Identify the unit that is required for mass and velocity, respectively, to determine the kinetic energy in Joules.

this would be c

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B) Jumping at a 45° angle would increase the height of his jump.

Jumping is a type of projectile motion. We start from zero initial velocity and start running until the time comes when we want to jump. We also know that we cannot jump straight on any point we must cover some distance in the X axis too which makes our motion a projectile motion so the projectile motion gains its maximum height when it takes the angle of 45 therefore option B is the correct answer.

Answer:

Yes

Explanation:

There are two types of interference possible when two waves meet at the same point:

- Constructive interference: this occurs when the two waves meet in phase, i.e. the crest (or the compression, in case of a longitudinale wave) meets with the crest (compression) of the other wave. In such a case, the amplitude of the resultant wave is twice that of the original wave.

- Destructive interferece: this occurs when the two waves meet in anti-phase, i.e. the crest (or the compression, in case of a longitudinal wave) meets with the trough (rarefaction) of the other wave. In this case, the amplitude of the resultant wave is zero, since the amplitudes of the two waves cancel out.

In this problem, we have a situation where the compression of one wave meets with the compression of the second wave, so we have constructive interference.

Answer: 9.43 s

Explanation:

Since there is no external force acting in space, the total momentum of the entire system would be conserved.

When the astronaut throws a canister, an equal and opposite amount of force would act on the astronaut which means momentum of the canister would be equal to momentum of the astronaut,

⇒ m v = m' v'

⇒ 12 kg × 12 m/s = 68 kg × v'

The velocity of the astronaut would be:

v' = 2.12 m/s

The distance need to be covered by astronaut to reach the spaceship = 20 m

Time taken : Distance/ velocity = 20 m / 2.12 m/s = 9.43 s.

Hence, astronaut would take 9.43 s to reach the spaceship.

Voltage is the difference in electric potential energy per unit charge between two points. Voltage is the work to be done, upon an unit charge to move between two points, against a static electric field. A voltage which is a measure of electric potential difference, is the cause of electrical current to flow in a closed circuit.

Answer: voltage is the difference in electrical potential energy between two places in an electric field

Explanation:

R = √ (5²m² + 13²m²)

R = √ (25m² + 169m²)

R = √194m²

R = 13.928... m

R = 13.9 m

The magnitude of the resultant vector would be 13.93 meters because as per the triangle law of the vector addition the resultant is the closing side of the triangle.

The quantities that contain the magnitude of the quantities along with the direction are known as the vector quantities.

Examples of the vector quantities are displacement, velocity acceleration, force, etc.

While the scalar quantities do not contain the information of the direction they only have a magnitude of the quantity measured.

The resultant vector can be calculated with the help of the triangle law of the vector addition

By using the Pythagoras theorem for the right-angled triangle

Resultant² = base² + height²

Resultant² = 13² + 5²

Resultant²  = 194

Resultant = √194

                =13.93 m

Since the resultant is the closing side of the triangle according to the triangle law of vector addition, the resultant vector's magnitude would be 13.93 meters.

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Answer: option d. an observation

Explanation:

"A scratch mark appears on talc when diamond is rubbed on it"; is most likely to be an observation.

A hypothesis is a statement which can be tested through an experiment. An experiment involves some steps. Within an experiment certain observations are made and thereafter conclusion is drawn.

When diamond is rubbed on the talc, scratch mark appears is most likely an observation. The appearance of scratch mark is an observation after talc was rubbed by diamond.

Answer: d. an observation

Explanation:

In an experimentation process an observation is a process of examining or monitoring something like a experimental variable or any other entity so as to derive a conclusion of the experiment. It involves the physical or visual examination.

According to the given situation the scratch marks can be observed over the talc caused by the diamond on rubbing. Hence, it is the example of an observation.  

In physics, speed is the ratio between the distance traveled and the length of the body's movement.

So the correct answer is A

Answer

In this question we have given,

Height of plane, h1=2000m

Height at which charge concentration is 40C, h2=3000m

Height at which charge concentration is -40C, h3=1000m

charge concentaration, q1=40C

charge concentaration, q2=-40C

let the charge concentrations at height h2 and h3 as point charges

Now we will first find the electric feild on plane due to positive charge q1=40

[tex]E1= k*q1/(h1-h2)..............(1)[/tex]

Here k=8.98755*10^9N.m^2/C^2

q1=40C

put values of k, q1 , h1 and h2 in equation 1

[tex][tex]E1=(8.98755*10^9)*(40)/(2000-3000)^2[/tex]\\

[tex]E1=[tex]E= 359502+359502\\E=719004 V/m[/tex]V/m[/tex]

similarly electric feild due to negative charge q2=-40

[tex][tex]E2=(8.98755*10^9)*(-40)/(2000-1000)^2[/tex]\\

[tex]E2=359502V/m[/tex]

Total electric feild E at the aircraft is given as

[tex]E= E1+ E2\\[/tex]...............(2)

Put values of  E1 and E2 in equation2

[tex]\\E=359502+359502\\E= 719004V/m\\[/tex]

therefore s Total electric feild E at the aircraft is E= 719004V/m

To find the electric field at the aircraft, we use Gauss's law. We can consider a cylindrical surface with the aircraft at the center and a radius of 2000m. By calculating the enclosed charge and surface area, we can determine the electric field.

To find the electric field in the aircraft, we need to use the concept of Gauss's law. Gauss's law states that the total electric flux through a closed surface is proportional to the total enclosed charge. In this case, we can consider a cylindrical surface with the aircraft at the center and a radius of 2000m. The charge enclosed by this surface is 40.0C (the charge concentration at 3000m) minus -40.0C (the charge concentration at 1000m). The resulting value is 80.0C. Now, we can calculate the electric field by dividing the enclosed charge by the surface area.

The surface area of the cylindrical surface can be calculated using the formula A = 2πrh. Plugging in the values, we have A = 2π(2000)(10^3) = 4π(10^6) m^2. Finally, we can find the electric field by dividing the enclosed charge by the surface area: E = 80.0C / 4π(10^6)m^2.

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Answer:

      Momentum is defined as "It is the quantity of motion of moving body, measured as a product of its mass and velocity".

Mathematically, p =m.v ;

                             = (kg . m/s)

                  where ,

                                         mass in kg

                                   velocity in m/s

The inappropriate unit for momentum is 'kilograms times meters per hour (kg⋅m/hr)' because the SI unit of time for momentum should be seconds, not hours. The correct option is: kg.m/hr

The unit for momentum in the International System of Units (SI) is kilogram meters per second (kg⋅m/s). Momentum, being a vector quantity, is the product of mass (a scalar) and velocity (a vector). Hence, for momentum, we would need the mass in kilograms (kg) and velocity in meters per second (m/s). The correct SI units reflect this relationship.

Examining the options given:

grams (g) times meters per second (g⋅m/s) could be used for momentum, but it is not in SI units.

kilograms times meters per hour (kg⋅m/hr) is not correct because the SI unit of time for momentum is seconds, not hours.

kilometers times meters per second (km⋅m/s) is incorrect, as the unit for mass should be kilograms not kilometers, which is a unit of length.

grams times centimeters per minute (g⋅cm/min) also do not match the SI unit standards for momentum.

The option not using the correct units for momentum is 'kilograms times meters per hour (kg⋅m/hr)' as momentum requires units of mass (kilograms) and velocity (meters per second).

The correct answer to your question would be the 1st answer choice, A series circuit.

Hope this helped you!! (:

Final answer:

A circuit with a single current path is a series circuit, characterized by its components connected end-to-end in a single loop.

Explanation:

A circuit that has only a single path for current to flow through is best classified as a series circuit. In a series circuit, all components are connected end-to-end to form a single loop, giving current only one path to follow. This is in contrast to a parallel circuit where components are connected across common points and current divides into multiple paths. In a series circuit, the current is the same throughout and the sum of the voltages across each component must equal the supplied voltage. An open circuit refers to a broken path where no current flows, a parallel circuit has multiple paths for current, and a short circuit indicates an unintended path allowing current to bypass a component within the circuit.

[ Answer ]

No, they not equally powerful

[ Explanation ]

Just because they did the same amount of work, does not mean they are equally powerful. One person could have spent 5 hours on a project, but done just as much as the other person. The other person could have spent 3 hours on the same thing and have just as much work, but not be as powerful. It all depends on the quality of the work.

More Powerful: 1 person spends 2 hours on a 3 paragraph essay

Less Powerful: 1 person spends 35 minutes on a 3 paragraph essay

They both did the same thing, but the person that spent 2 hours on it is more powerful. This is true because even thought it was a 3 paragraph essay and the other person did the same essay, she put in much more time and effort, making her essay better quality and more powerful.

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If two people do the same amount of work on an object, the power of them depends on how fast they do the work. The person, who do the work fast, is more powerful. So, this does not mean they are equally as powerful.

Power is defined in physics as the amount of energy transferred or converted per unit time. The watt is the unit of power in the International System of Units, equal to one joule per second. Power is sometimes referred to as activity in older works. A scalar quantity is power.

Hence, mathematically, power can be written as:

power = work/time

Hence, If two people do the same amount of work on an object, , this does not mean they are equally as powerful  because The person, who do the work fast, is more powerful compare to the other.

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Data is inappropriate

  here, we need gauge of the wire i.e., diameter of the wire, so that we calculate the resistance by using the formula

                              R  = ρl/A            

            where R= resistance ; Ω

                       l = length of wire ; m

                       A = area of wire ; m²

                       ρ = resistivity ; Ω-m

But in general ohms law is

                    V = I R

                    R = V/I ;

but here we also calculate "R" from length of wire in which the current is flowing.

I hope it is helpful to you.

Given that

Power rating (P) = 11 W,

Change in voltage (ΔV) = 8V ,

              We know that, P = ΔV . I

                                        I = P ÷ ( ΔV)

                                          = 11 ÷ 8

                                        I = 1.375 A

current used by camcorder is 1.375 A.

Use Net Force Equation.

Fnet = F1 + F2 + F3 + F4

In which the following main forces in play are:

F1 = Gravitational Force

F2 = Normal Force

F3 = Thrust Force

F4 = Air resistance

Since this is assumed to happen on a flat surface, the gravitational and normal forces cancel out. So we are left with:

Fnet = F(thrust) + F(air resistance)

Now we can use this equation to solve for the net force.

Fnet = 10N [right] + 7N [left]

Fnet = 10N [right] - 7N [right]

Fnet = 3N [right].

Therefore, the total net force acting on this car would be 3N [right]

The net force acting on the race car is 7 N to the right.

The net force acting on the race car can be determined by considering the forces acting on it. In the picture, we can see that there are two forces: a 10 N force to the right and a 3 N force to the left. Since the forces are in opposite directions, we can subtract the magnitude of the smaller force from the magnitude of the larger force to find the net force. Therefore, the net force acting on the race car is 7 N to the right.

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Distance/speed = time

300/45 = 6.667 hour

Final answer:

The train traveling 300 miles at an average speed of 45 mph will take approximately 6 hours and 40 minutes to complete the journey.

Explanation:

To calculate the time taken for a train to travel a certain distance at a specific average speed, we can use the formula time = distance / speed. In this problem, the train goes 300 miles at an average speed of 45 miles per hour (mph). Plugging these values into the formula, we find:

Time = 300 miles / 45 mph

The calculation will give us the result in hours since we are dividing miles by miles per hour.

Time = 6.666... hours

To convert this into minutes, we simply multiply by 60 (since there are 60 minutes in an hour):

Time in minutes = 6.666... hours * 60 minutes/hour = 400 minutes

Therefore, it will take the train approximately 6 hours and 40 minutes to travel the 300-mile distance at an average speed of 45 mph.

A is the correct answer here.

C is the right equation. As velocity= frequency*wavelength, you can turn the equation around to get the c answer,

Answer:

Force = 20N

acceleration (a) = 1.5 m/s²

Mass of object (m) = ?

From Newtons II law

                       F = m. a N

                        m =  F/a

                        m = 20/1.5

                       m = 13.34 Kg

Mass of an object is 13.34 Kg

In a gas-powered lawnmower, the gasoline is converted from chemical energy into mechanical energy.

The conversion of gasoline's chemical energy into mechanical energy in a lawnmower is facilitated by an internal combustion engine. Here's how you can calculate the energy conversion step by step:

1. Energy in gasoline: Gasoline typically contains about 34.2 megajoules (MJ) per liter or 34,200,000 joules per liter.

2. Efficiency of the engine: The efficiency of a typical small engine used in lawnmowers can be estimated at around 20% to 30%. Let's assume 25% efficiency for this calculation.

3. Energy output: Multiply the energy in gasoline by the engine efficiency:

  Energy output = Energy in gasoline . Efficiency

               = 34,200,000 joules/L . 0.25

               = 8,550,000 joules/L

So, in a gas-powered lawnmower, the gasoline is converted from chemical energy into mechanical energy, with an output of approximately 8,550,000 joules per liter.

Gasoline contains a certain amount of energy per unit volume. This energy is released during combustion in the engine, which drives the piston, crankshaft, and ultimately the blades of the lawnmower, converting the chemical energy of gasoline into mechanical energy to cut grass.

The efficiency of the engine plays a crucial role in this conversion. Not all the energy in gasoline is converted into useful mechanical work; some is lost as heat and in friction. In this case, assuming a 25% efficiency means that about a quarter of the energy in gasoline is converted into mechanical energy, while the rest is lost as heat.

In summary, the chemical energy in gasoline is transformed into mechanical energy in a gas-powered lawnmower, with the efficiency of the engine determining how much of that energy is effectively converted into useful work.

Complete Question:

In a gas-powered lawnmower, the gasoline is converted from chemical energy into which other type of energy?

Answer:

The points 2 and 4 should be connected.

Explanation:

To complete the circuit, we need to connect the two points which when connected, encompass the battery and the bulb in the circuit. The points 2 and 4 do the job, since they connect the terminal of the battery and the terminal of the bulb, and thus complete the circuit.

Therefore,  the choice C is correct.

Answer:

C) Points 2 and 4

Explanation:

In a complete electric circuit, wires carry the current from the battery to the bulb and from the bulb to the battery. The wires should be attached to points 2 and 4 to make the bulb glow.

Animals that have those features are known as vertabrates. Such as fish and birds.

Answer:

Radiography takes single projectional images. Fluoroscopy shows live images. CT scans can be used to take cross-sectional images or build 3D images.

Explanation:

X- rays are electromagnetic radiations. Three important application of X-rays are Fluoroscopy, Projection Radiology and Mammography.

X- rays are higher energy of ionising radiation and can penetrate many objects including human body. X-rays can used to detect various diseases in human body and helps to diagnose it.

Fluoroscopy is a medical procedure to make a real-time video of the movement inside a part of the body by passing X-rays through the period of time. It is used for diagnosing a health problem such as heart or intestinal disease and to track the injected path or swallowed contrast agent. This technology is used with a radiographic contrast agent to guide an internally threaded catheter during cardiac angioplasty.

Projection radiography is also known as Conventional Radiography is a form of medical imaging to produce two-dimensional images by using X-ray radiation. These are helpful in detection of some disease process in soft tissues. It is also used to detect bone fractures, fine bone pathology, and to measure the bones for growth studies. It is used to look at implanted devices such as Artificial knee or hip.

A mammography is very common application for the X-rays. It is used for the patients who diagnosed with breast cancer. Mammograms use X-rays to capture image of what's inside the breasts. It is used to detect abnormal growth of breasts, so a determination can be made it further testing is necessary. Mammograms drastically reduced the death of breasts cancer, because it allows for early diagnosis.

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We are to show that the given parametric curve is a circle.

The trajectory of a circle with a radius r will satisfy the following relationship:

[tex](x-x_c)^2 + (y-y_c)^2 = r^2[/tex]

(with (x_c,y_c) being the center point)

We are given the x and y in a parametric form which can be further rewritten (using properties of sin/cos):

[tex]x(t) = A\sin \pi(t+1) = A\sin (\pi t + \pi) = -A\sin \pi t\\y(t) = A\sin (\pi t + \frac{\pi}{2}) = A\cos \pi t[/tex]

Squaring and adding both gives:

[tex]x^2(t) + y^2(t) = A^2(-1)^2\sin^2 \pi t + A^2 \cos^2 \pi t = A^2\\\implies x^2 + y^2 = A^2[/tex]

The last expression shows that the given parametric curve is a circle with the center (0,0) and radius A.

Answer:

Color is the answer

Explanation:

Got it right on A P E X

Answer:

360 V

Explanation:

We can use the transformer equation:

[tex]\frac{V_p}{N_p}=\frac{V_s}{N_s}[/tex]

where

[tex]V_p[/tex] is the primary (input) voltage

[tex]N_p[/tex] is the number of turns in the primary coil

[tex]V_s[/tex] is the secondary (output) voltage

[tex]N_s[/tex] is the number of turns in the secondary coil

In this problem,

[tex]V_p = 120 V\\N_p = 25\\N_s = 75[/tex]

Substituting into the equation, we can find the output voltage:

[tex]V_s = N_s \frac{V_p}{N_p}=(75)\frac{120}{25}=360 V[/tex]

Im not all the way sure but i think it is 2.7778 m/s. I hope this help you. :)

Answer:

10 km/h is the correct answer

Explanation:

The answer is; A

Fertilizer application can be detrimental  when there is overapplication. The excess nutrients are washed away by runoff after precipitation. These nutrients end up in water bodies and cause algal blooms. Algal blooms asphyxiate aquatic life hence causing a drastic reduction in aquatic populations.

3) Transverse waves which travel with light speed

The answer is  0.000824653J

You need to use the formula Mass * Velocity^2 over 2

Answer:

The kinetic energy of the bullet is approximately 10688 Joules, or about 10.7kJ.

Explanation:

Use the kinetic energy formula:

[tex]E_k=\frac{1}{2}mv^2= \frac{1}{2}9.5\cdot10^{-3}kg\cdot 1.5^2\cdot 10^6 \frac{m^2}{s^2}\approx 10688J[/tex]

The kinetic energy of the bullet is approximately 10688 Joules, or about 10.7kJ.