Which of the following would be an example of a vector? *
An object with a mass of 15 kg
An car moving at 30 m/s
A person running 5 m/s north
A spring with 16 J of energy

A passenger weighing 500N is inside an elevator weighing 24500 N that rises 30 m every minute is 12500 W (12.5 kW).

What is Power?

Power is the amount of work that is done per unit of time. It can be associated with the speed of a change of energy within a system, or the time it takes to perform a job.

There are different types of power,

Mechanical power: is that work performed by an individual or a machine in a certain period of time.

Electric power: which is the result of the multiplication of the potential difference between the ends of a load and the current flowing there.

P= W/t

Where, P- Power,

W- Work

T- Time

The total weight of the passenger + elevator is

Fg = 500+24500

    = 25000

The total work done to rise the elevator + passenger is equal to the product between the total weight and the distance covered during the trip (d = 30 m):

W = Fgd

   = 25000×30

   =7,50,000 J.

The power needed for the trip is equal to the ratio between the work done (W) and the time taken (t):

P = W/t

Since the time taken is t = 1 min = 60 s, the power needed is

P = 750000 / 60

   = 12,500 W

P = 12.5 kW

Thus, Power was calculated as P = 12.5 kW.

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Answer:

endoplasmic reticulum

Answer:

Thermal energy can be transferred to one object to another in the form of heat. It causes molecules and atoms to collide with each other because of the rising of heat.

Explanation: Well thermal energy is a example of kinetic energy. It is heated by motion. It is heat that can be measured

Answer:

the answer would be left side a to right side b left side b to left side c left side c to left side d left side d to right side e

Explanation:

The angular acceleration of the rotating wheel at the given rate of change of angular velocity is 0.21 rad/s².

The angular acceleration of an object is the rate of change of anguar velocity of the object with time.

\(\alpha = \frac{\Delta \omega }{\Delta t}\)

where;

Change in angular velocity of the wheel is calculated as follows;

\(\Delta \omega = 2 \ \frac{rev}{s} \times \frac{2\pi \ rad}{1 \ rev} = 4\pi \ rad/s = 12.57 \ rad/s\)

Change in time, Δt = 1 min = 60 s

The angular acceleration of the rotating wheel is calculated as follows;

α = (12.57) / (60)

α = 0.21 rad/s²

Thus, the angular acceleration of the rotating wheel at the given rate of change of angular velocity is 0.21 rad/s².

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The Planck function, also known as the Planck radiation law, calculates the spectral radiance of electromagnetic radiation emitted by a black body at a given temperature.

A black body is an idealized object that absorbs all radiation incident upon it and emits radiation based solely on its temperature. The Planck function describes the spectral distribution of the radiation emitted by a black body, meaning it gives the amount of energy emitted by the black body per unit time, per unit area of the emitting surface, per unit solid angle, and per unit frequency (or wavelength) of the radiation.

The Planck function is a crucial tool for comprehending how electromagnetic radiation behaves in a variety of contexts, including cosmology, astrophysics, and thermal radiation. It has been used to explain phenomena like the spectrum of stars and galaxies and the cosmic microwave background radiation.

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Answer:

In order to answer this question, you need the enthalpy of fusion of ice, which is 333.55 J/g (Joules/gram). The enthalpy of fusion is the amount of heat that must be absorbed or lost in order to change physical state.

The number of Joules required to melt the ice = enthalpy of fusion of ice x mass of ice.

1 kg = 1000g

40kg x (1000g/1kg) = 40,000g

Joules needed to melt the ice = 333.55 J/g x 40000 g = 13342000 J or

1.3342 x 107 J

Explanation:

Instead of 40kg input 50kg and get the answer

Answer:

Standard units are the units we usually use to measure the weight, length or capacity of objects.

Answer:

THE SYSTEM OF UNITS WHICH IS AGREED BY THE INTERNATIONAL CONVENTION OF SCIENTISTS HELD IN FRANCE IN 1960 IS CALLED SI SYSTEM.

In the electromagnetic spectrum the greater the frequency the smaller the wavelength, then is the frequency is the lowest in the light spectrum the light will have the longest wavelength. Therefore, the answer is b.

Answer:

1800 j or 1.8 kj

Explanation:

Energy used = power (measured in watts) multiplied by time (measured by seconds)

1 minute is 60 seconds

30 multiplied by 60 is 1800

Answer:

1800 joule

Explanation:

Power (P) = 30W

Time (T) = 1 min =60 sec

P =(W/T)

30 = W / 60

W = 1800 joule

We know that Energy Is equivalent to Work done. So Energy used is 1800 joule.

Answer:

which question

Answer:

C

Explanation:

Apply the uniform acceleration equation \(v^{2} = u^{2} +2as\)

v: Final velocity (When the stone reaches its maximum height)

u: Initial velocity (The velocity of the stone at the instance when it is thrown)

a: Acceleration due to gravity

s: Displacement of the stone

Take \(v=0m/s\) since the stone is momentarily at rest when it reaches its maximum height.

Take \(a = -9.81 m/s^2\), the negative sign indicates the stone is decelerating due to gravity.

Take \(s=10m\) as stated in the question.

\(0^2=u^2+2(-9.81)(10)\)

\(196.2=u^2\)

\(u=\sqrt{196.2}\)

\(u=14.00714104m/s\)

Therefore, the closest answer is C (\(14m/s\))

The root-mean-square speed of argon molecules in a sample of argon gas at a temperature of 102°C is approximately 339.2 m/s.

The root-mean-square (Rms) speed of argon molecules in a sample of argon gas at a temperature of 102°C can be calculated using the following formula:rms speed = (3kT/m)^(1/2)where k is the Boltzmann constant (1.38 × 10^−23 J/K), T is the temperature in Kelvin, and m is the mass of one argon molecule which is 6.63 × 10^−26 kg.The first step is to convert the temperature from Celsius to Kelvin.

To do that, we can use the formula:T(K) = T(°C) + 273.15T(K) = 102°C + 273.15T(K)

= 375.15KNow we can plug in the values into the rms speed formula:

rms speed = (3kT/m)^(1/2)

rms speed = [3(1.38 × 10^−23 J/K)(375.15K)/(6.63 × 10^−26 kg)]^(1/2)

rms speed = 339.2 m/s (rounded to three significant figures)

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Answer:.....................

solar panels

true

Explanation:

this is because melting point and boiling point decreases down the group because they are held together by attractions between positive nuclei and delocalised electrons

Answer:

the answer is semidiurnal

Answer:

I think it is semi-diurnal :)

Hope this helps!!

Have a great day!!

Please rate and mark brainliest!!

It depends on the size and weight of the box, as well as the size of the truck.

Generally speaking, it may take more work to pick up a box straight up into the back of a truck, as it requires more physical strength and effort. However, pushing a box up a ramp into the back of the truck could require more energy, as the person pushing the box must contend with the ramp's incline.

When it comes to the amount of work needed to move a box into the back of a truck, it largely depends on the size and weight of the box, as well as the size of the truck. Picking up a box straight up into the back of a truck requires a great deal of physical strength and effort, as the person must be able to lift the box up to the desired height in order to get it into the truck.

On the other hand, pushing a box up a ramp into the back of the truck could require more energy, as the person pushing the box must contend with the ramp's incline. Additionally, if the box is particularly heavy, pushing it up a ramp could require more effort than simply lifting it up and into the truck. Therefore, it is difficult to definitively say which requires more work, as it depends on the specifics of the situation.

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Answer:

a object with net force on it will stay in motion unless acted on by an equal opposite force.

The probable source of the day-to-day variations in Jupiter's belts and zones is differential rotation and the underlying zonal flow.

Differential rotation is the phenomenon where different parts of a rotating object rotate at different speeds. In Jupiter's case, the equator rotates faster than the poles. This differential rotation causes the belts and zones to form.

The underlying zonal flow is a large-scale circulation pattern in Jupiter's atmosphere. This flow is caused by the planet's strong gravity and the heat generated by its core. The zonal flow helps to transport heat from the equator to the poles and also helps to maintain the belts and zones.

The day-to-day variations in Jupiter's belts and are caused by a combination of differential rotation and the underlying zonal flow. These variations can be caused by changes in the planet's temperature, pressure, and composition. They can also be caused by interactions with the planet's moons and other objects in the solar system.

The day-to-day variations in Jupiter's belts and zones are a fascinating phenomenon that scientists are still trying to understand. These variations provide us with clues about the planet's interior and atmosphere, and they help us to better understand the dynamics of giant planets.

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Answer:

You need to use the equations of motion which I wrote down in the image. Since the runner starts from rest, the initial velocity(v0) is 0 and initial position(x0) is also 0. The solution is in the image attached below.

a. By the work-energy theorem, the total work required to stop the car is equal to the change in its kinetic energy,

W = 0 - 1/2 (750 kg) (25 m/s)² ≈ -230 kJ

b. The car covers a distance x as it stops such that

W = (-725 N) x   ==>   x ≈ 320 m

If the wall or building were not perpendicular to the ground, it would introduce errors in the measurements and calculations, while using a tape measure introduces uncertainty, and the accuracy of reading a protractor depends on the specific protractor and the observer's skill.

If the wall or building were not perpendicular to the ground, it would affect the accuracy of the measurements and calculations in the previous experiments. The angles and distances involved in the calculations would be different, leading to potential errors in the results.

Using a tape measure to measure the sides of the triangle introduces uncertainty due to potential measurement errors, such as parallax or slight stretching of the tape measure. These errors can affect the accuracy of the triangle's side lengths and consequently the calculated values.

The degree of accuracy when reading a protractor depends on the precision of the protractor and the observer's ability. Protractors typically have markings for every degree and sometimes subdivisions for half or quarter degrees. With careful observation and estimation, it is possible to read a protractor to the nearest degree or even estimate angles within a few degrees of accuracy. However, the exact degree of accuracy would depend on the specific protractor and the skill of the person using it.

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Answer:

b

Explanation:

It takes less effort to lift a piano with a pulley. If the piano is lifted 3 meters, then the pulley rope is pulled more than 1 meter, but less than 3 meters.

It takes less effort to lift a piano with a pulley. If the piano is lifted 3 meters, then. The correct answer is a. the pulley rope is pulled 1 meter.

When lifting a piano using a pulley system, the distance the pulley rope is pulled will be the same as the distance the piano is lifted. This is due to the mechanical advantage of the pulley, which reduces the amount of effort needed to lift the piano but does not change the distance the rope is pulled.

In a simple single fixed pulley system, where one end of the rope is attached to a fixed point and the other end is used to lift the piano, the distance the pulley rope is pulled will indeed be the same as the distance the piano is lifted.

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The principles which allow aircraft to fly are also applicable in car racing. The only difference being the wing or airfoil shape is mounted upside down producing downforce instead of lift. The Bernoulli Effect means that: if a fluid (gas or liquid) flows around an object at different speeds, the slower moving fluid will exert more pressure than the faster moving fluid on the object. The object will then be forced toward the faster moving fluid. The wing of an airplane is shaped so that the air moving over the top of the wing moves faster than the air beneath it. Since the air pressure under the wing is greater than that above the wing, lift is produced. The shape of the Indy car exhibits the same principle. The shape of the chasis is similar to an upside down airfoil. The air moving under the car moves faster than that above it, creating downforce or negative lift on the car. Airfoils or wings are also used in the front and rear of the car in an effort to generate more downforce. Downforce is necessary in maintaining high speeds through the corners and forces the car to the track. Light planes can take off at slower speeds than a ground effects race car can generate on the track. An Indy ground effect race car can reach speeds in excess of 230 mph using downforce. In addition the shape of the underbody (an inverted wing) creates an area of low pressure between the bottom of the car and the racing surface. This sucks the car to road which results in higher cornering speeds.

The total aerodynamic package of the race car is emphasized now more than ever before. Teams that plan on staying competitive use track testing and wind tunnels to develop the most efficient aerodynamic design. The focus of their efforts is on the aerodynamic forces of negative lift or downforce and drag. The relationship between drag and downforce is especially important. Aerodynamic improvements in wings are directed at generating downforce on the race car with a minimum of drag. Downforce is necessary for maintaining speed through the corners. Unwanted drag which accompanies downforce will slow the car. The efficient design of a chassis is based on a downforce/drag compromise. In addition the specific race circuit will place a different demand on the aerodynamic setup of the car.

A road course with low speed corners, requires a car setup with a high downforce package. A high downforce package is necessary to maintain speeds in the corners and to reduce wear on the brakes. This setup includes large front and rear wings. The front wings have additional flaps which are adjustable. The rear wing is made up of three sections that maximize downforce.

The speedway setup looks much different. The front and rear wings are almost flat and are used as stabilizers. The major downforce is found in the shape of the body and underbody. Drag reduction is more critical on the speedway than on other circuits. Since the drag force is proportional to the square of the speed, minimizing drag is a primary concern in the speedway setup. Lap speeds can average over 228 mph and top speeds can exceed 240 mph on a speedway circuit. Effective use of downforce is especially pronounced in highspeed corners. A race car traveling at 200 mph. can generate downforce that is approximately twice its own weight.

Generating the necessary downforce is concentrated in three specific areas of the car. The ongoing challenge for team engineers is to fine tune the airflow around these areas.

Answer:

V = 2 π R / T        speed V where T is period

T = 2 π R / V     = 2 π * .2 m / 1.5E5 m/s = 8.38E-6 sec

Period = 8.36 * 10-6 sec

According to Newton's law, the greater the mass of the object, the greater force will be required.

The mass of the bowling ball is more than that of the tennis ball.

Thus, the bowling ball requires more force.

Answer:

The answer is B.

Explanation:

Given that the current (Ampere) in a series circuit is same so we can ignore it. We can assume that the total voltage is 60V and all the 3 resistance are different, 20Ω, 40Ω and 60Ω. So first, we have to find the total resistance by adding :

Total resistance = 20Ω + 40Ω + 60Ω

= 120Ω

Next, we have to find out that 1Ω is equal to how many voltage by dividing :

120Ω = 60V

1Ω = 60V ÷ 120

1Ω = 0.5V

Lastly, we have to calculate the voltage at R1 so we have to multiply by 20 (R1) :

1Ω = 0.5V

20Ω = 0.5V × 20

20Ω = 10V

Answer:

15 m/s^2 The first thing to calculate is the difference between the final and initial velocities. So 180 m/s - 120 m/s = 60 m/s So the plane changed velocity by a total of 60 m/s. Now divide that change in velocity by the amount of time taken to cause that change in velocity, giving 60 m/s / 4.0 s = 15.0 m/s^2 Since you only have 2 significaant figures, round the result to 2 significant figures giving 15 m/s^2

Explanation:

Given data:Current (I) in the long straight wire = 6.0 A Current (i) in the circular loop = 1.0 A Radius (r) of the circular loop = 10 cm = 0.1 mDistance (d) of the point P from the z-axis = 25 cm = 0.25 mVelocity of the electron (v) = 1.0 x 106 m/sNow, the magnetic field due to the circular loop at the center (P) of the loop is given by the formula:B = μ0 i / 2 R where,μ0 = Permeability of free space = 4π × 10⁻⁷ Tm/ir = Radius of the circular loopi = Current flowing in the circular loopSubstitute the given values,μ0 = 4π × 10⁻⁷ Tm/i = 1.0 AR = 0.1 mB = (4π × 10⁻⁷ × 1.0) / (2 × 0.1)B = 6.28 × 10⁻⁵ T.

The magnetic field at point P is 6.28 × 10⁻⁵ T, acting in the positive y-direction.By Lorentz's law, the magnetic force acting on a charged particle moving in a magnetic field is given by:F = q (v × B)where,q = Charge of the particlev = Velocity of the particleB = Magnetic field acting on the particle Cross product of velocity and magnetic field:v × B = | i  j  k| v1  v2  v3  B1  B2  B3| = (v2B3 - v3B2)i - (v1B3 - v3B1)j + (v1B2 - v2B1)k| = (-v × B).

The electron has a charge of -1.6 × 10⁻¹⁹ C, velocity v = - 1.0 x 106 m/s in the negative x-direction and experiences a magnetic force in the positive y-direction. Hence, only the y-component of the force will be considered.Substitute the given values in the equation:F = q (v × B)F = -1.6 × 10⁻¹⁹ [(1.0 x 106) (-6.28 × 10⁻⁵)]F = 1.005 × 10⁻¹² NThe y-component of the magnetic force on the electron is 1.005 × 10⁻¹² N.Answer: 1.005 × 10⁻¹² N.

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Answer: A) 10

Explanation:

I plugged in the numbers into a calculator.

Ex:

The formula for density is d=m/v so I divided 15 by 1.5 and it gave me 10.