If a small motor does 200 J of work to move a toy car 40 m, what force does it exert?

The answer is A. inerta

.....

Brine is used in a chilled water heat exchanger.

Mass flow of brine = 208.75 lb / min

Heat transferred to brine = 5771.9375 Btu/min

Mass flow rate of water in lb/min = 288.597 lb/min

Mass flow rate of water in gpm = 34.5625 g

1. Mass flow of brine

       1gm = 8.35 lb / min

       Therefore, 25 gm = 25 * 8.35 = 208.75 lb / min

2. Heat transferred to brine = mbrine * Cbrine (T0 – Ti)

                                                   = 208.75 * 0.79 (35 - 0)

                                                   = 5771.9375 Btu/min

3. Heat lost by water = Heat gained by brine

       Mwater * Cwater (Ti - T0) = 5771.9375

       Mwater = 5771.9375 / (1 * (55 - 35)) = 288.597 lb/min

4. Mass flow rate of water = 288.597 / 8.35 = 34.5625 g

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Explanation:

An object's position in a given coordinate system is described by the vector r = t2 i - (3t + 3) j. Assume the object moves without air resistance. What is the object's acceleration at t4 = 5 seconds? Write your answer in component form. just use the formula, if you use formula you will know how to do.

The object's acceleration at t = 5 seconds would be 2 meters/second².

The rate of change of the velocity with respect to time is known as the acceleration of the object.

An object's position in a given coordinate system is described by the vector r = t² i - (3t + 3) j,

assuming the object moves without air resistance.

displacement = t² i - (3t + 3) j

velocity = 2t i -3 j

acceleration = 2i

Thus, the object's acceleration at t = 5 seconds would be 2 meters/second².

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The force of gravity between two objects is directly proportional to the product of their masses and inversely related to the square of distance between them.

We have a Pair of objects.

We have to discuss about the force of gravity between them.

In physics, gravity is a fundamental interaction which causes mutual attraction between all things with mass or energy.

According to the question -

Assume that the mass of objects are m and M. They are separated by distance r apart.

According to the Newton's law of gravitation - the force of gravity between the two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. Therefore, the force of gravity between m and M will be -

[tex]$F = \frac{GMm}{r^{2} }[/tex]

Hence, the force of gravity between two objects is directly proportional to the product of their masses and inversely related to the square of distance between them.

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Answer: The force exerted on the box was 41 N.

Explanation: The amount of work done is equal to the force exerted on the object times the distance it was moved. In this case, the force was 41 Newtons and it was moved 52 meters, so the work done was 2160 Joules. Divide 2160/52.

Answer:

2538263

Explanation:

when I divide it this is the answer I got

Answer:

As an object moves away from us, the sound or light waves emitted by the object are stretched out, which makes them have a lower pitch and moves them towards the red end of the electromagnetic spectrum, where light has a longer wavelength.

Explanation:

Doppler shift example: Sound waves from a police car siren. The car is driving forwards. The sound waves in front of the car get bunched up and the sound waves behind the car get stretched out.

In the case of light waves, this is called redshift

Answer:

pp

Explanation:

hahahahhahahhahahahahahaahhahaha..  tbh

Answer:

D=5g/2cm cubed

Explanation:

D=M/V

D=55g/22cm cubed

D=5g/2cc

Extraversion, openness, conscientiousness, neuroticism, and agreeableness have common factors in that these are the part of  "Big 5" personality traits.

The scientific study of the mind and behavior is called psychology. Psychologists are actively involved in researching and comprehending how the mind, the brain, and behavior work.

The "Big 5" interpersonal qualities include extraversion, openness, conscientiousness, neuroticism, and agreeableness. These characteristics have certain things in common.

Extraversion, openness, conscientiousness, neuroticism, and agreeableness all have the "Big 5" personality qualities in common.

These five traits combine to form "OCEAN"

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Answer:

1.) the distances travelled during each time period are the same

Explanation:

1.) is correct. If the speed is constant, the truck is moving the same distance per every time period. For example, if the truck is moving at 50 miles/hour, the truck will always travel 50 miles per every 1 hour.

2.) is incorrect. Unlike the velocity, speed is non-directional. This means a truck can maintain a constant speed regardless of its orientation.

3.) is incorrect. Acceleration is the rate at which the velocity/speed changes. If the speed is constant, the acceleration is 0.

4.) is incorrect.

Answer:

it means how fast the wave is traveling in which a 40 ms is as fast as a car traveling

The resistance in the LED, CFL, and incandescent lightbulb would be 2.50 ohms.

Resistance is the obstruction of electrons in an electrically conducting material.

As given in the problem On three separate instances you connect each lightbulb to a battery with an and of 12.00V and an internal resistance of 0.5. When a current of 4A passes through the battery,

resistance = voltage /current

                  = 12 volt/4 ampere

                  = 3 Ohm

The total resistance across the circuit = internal resistance + resistance across the bult

resistance across the bulb = 3 - .50

                                            =2.5 Ohms

Thus, the resistance in the LED, CFL, and incandescent lightbulb would be 2.50 ohms

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The time taken for the new moon to orbit the earth is √8 times the time taken by the present moon.

According to Kepler's third law,

[tex]T_{m} ^{2}[/tex] = ( 4 π / G [tex]m_{E}[/tex] ) r³

[tex]T_{m}[/tex] = Time taken by the moon

G = Gravitational constant

[tex]m_{E}[/tex] = Mass of Earth

r = Radius of moon

r' = 2 r

r' = Radius of new moon

[tex]T'_{m} ^{2}[/tex] = ( 4 π / G [tex]m_{E}[/tex] ) ( 2 r )³

[tex]T'_{m} ^{2}[/tex] = 8 ( 4 π / G [tex]m_{E}[/tex] ) r³

[tex]T'_{m}[/tex] = √8 [tex]T_{m}[/tex]

Kepler's third law states that square of time period of a planet's orbit is equal to the cube of semi-major axis of the orbit.

Therefore, the time taken for the new moon to orbit the earth is √8 times the time taken by the present moon.

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O the dependent variable

The independent variable belongs on the x-axis (horizontal line) of the graph and the dependent variable belongs on the y-axis (vertical line).

Hi,

In general, what goes on the y-axis of a graph?

O the dependent variable

Answer:

N1 Sin θ1 = N2 sin θ2        Snell's equation

Sin θ2 = 1 / 1.33 * Sin 40

Sin θ2 = .752 * .643 = .483

θ2 = 28.9 deg

The resultant displacement is  (- 145 i - 130 j )m and the angle made by the resultant is 46° west of the South, this can be found using the polygon law of vector addition.

Physical quantity that has both magnitude as well as direction a vector is represented by a line ending with an arrow head where the length of the line represents the magnitude of the vector and the direction of the arrowhead represents the direction of the vector.

If two or more vectors are joined head to tail then the polygon law of vector addition states that the resultant of such a vector will be given by the vector addition of all the vectors present in the polygon.

Given:

Magnitude of vector 1 pointing south = 40m

Magnitude of vector 2 pointing south = 230 m

Magnitude of vector 3 pointing south of west = 110m

Magnitude of vector 4 pointing north of west = 180 m

Using the polygon law of vector addition we get,

The resultant displacement = vector 1 + vector 2 + vector 3 + vector 4

The resultant displacement = 40 i - 230 j - 110 × cos 30 i - 110 × sin 30 j- 180 × sin 60 j + 180 × cos 60

The resultant displacement = 40 i - 230 j - 95 i - 55 j + 155 j - 90 i

The resultant displacement = ( - 145 i - 130 j )m

To find the angle of the resultant vector we will use tangent trigonometric ratio.

Tan x = (-145)/(-130)

Tan x = (145)/(130)

x = 46° to west of South

Where,

x is the angle made by resultant vector with the vertical axis.

Therefore, the resultant displacement is  ( - 145 i - 130 j )m and the angle made by the resultant is 46° to the west of the South.

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The average velocity for completing three rounds of the basketball court would be zero as initial and final position would be zero and the average speed would be 3.28 m/s.

Average velocity is defined as the total displacement divided by the total time take to compete the total displacement.

Average speed is defined as the total distance divided by the total time take to compete the total distance.

Given:

Side of the baseball court = 100 meter

Total time taken to complete three rounds of the basketball court = 375 seconds

Total distance traveled by the player can be measured using the given side of the basketball court.

First we will find the parameter of the court,

Parameter of the court = 4 times the side of basketball court

Parameter of the basketball court = 4 × 100

Parameter of the basketball court = 400 metre

The player goes for 3 rounds of the basketball court which makes the total distance three times the parameter of the basketball court.

Total distance traveled by the basketball player = 3 × 400

Total distance traveled by the basketball player = 1200 metre

Average velocity is displacement divided by time taken.

Total displacement = 0 metre

As the player reaches the same position from where he started so the total displacement is zero.

Therefore, average velocity = 0/365

average velocity = 0 m/s

Average speed = 1200/365

Average speed = 3.28 m/s

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The term that describes the given graph is a negative correlation, linear, inversely proportional relationship

Regression evaluation is a similar method for inspecting the connection between a final results variable and one or extra threat elements or confounding variables (confounding is mentioned later). The end result variable is likewise referred to as the reaction or based variable, while the threat elements and confounders are referred to as predictors, explanatory variables, or unbiased variables. The based variable in regression evaluation is indicated with the aid of using "Y," whilst the unbiased variables are denoted with the aid of using "X."

The path of the hyperlink is indicated with the aid of using the signal of the correlation coefficient. The correlation coefficient's price displays the electricity of the hyperlink.

It is vital to spotlight that whilst there can be a non-linear dating among non-stop variables, calculating a correlation coefficient does now no longer display this. As an end result, it's miles usually vital to investigate the statistics well earlier than setting up a correlation coefficient. Graphical representations are very powerful for investigating relationships among variables.

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correlation  between the length of the semimajor axis and the orbital period is given by Kepler's 3rd law P² = kA³

Kepler's 3rd law is given as

P² = kA³

where

P = period, days

A = semimajor axis, AU

k = constant

Given: for mars

P = 687 days

A = 1.52 AU

Therefore

k = P²/A³

= 687²/1.52³

= 1.3439 x 10⁵ days²/AU³

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Answer:   There is a positive correlation. A longer semimajor axis corresponds to a longer orbital period.

Explanation:

A line of best fit is a straight line drawn through the most points on a scatter plot, with an equal number of points above and below the line. It is used to investigate the nature of the relationship between two variables. The correct option is d.

A straight line with the best fit is one that minimizes the distance between it and some data.

In a scatter plot of varying data points, the line of best fit is used to express a relationship. It is a result of regression analysis and can be used to forecast indicators and price movements.

It is important to note that your line does not need to pass through any of the points on the plot; it only needs to bisect the area that contains the data points.

Thus, none of the options are correct, the correct one is d.

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The frequency of a 1.77-Angstrom x-ray photon is 1.694×10^18hz.

AS, we can see, the wavelength given of x ray photon

[tex]\lambda[/tex]=1.77-Angstrom = 1.77×10^-10

we know the relationship betwee frequency and lambda

c=λν

ν=c/[tex]\lambda[/tex]

ν is frequency , [tex]\lambda[/tex] is wavelength, and c is speed of light

c= 3×10^8m/s

now put the value in equation:

ν= 3×10^8m/s÷1.77×10^-10

ν=1.694×10^18hz

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The maximum height reached by the model rocket is 300.5 metre. (b) Time to reach maximum height is 8.5 seconds and (c) the time for which the model rocket was in air is 17.3 seconds.

Newton's laws of motion are three basic laws of classical mechanics that describe the relationship between the motion of an object and the forces acting on it.

Given:

Initial velocity of the model rocket = 50m/s

Constant acceleration of rocket = 2 u

Height to which acceleration was in account= 150m

First we need to find the final velocity at 150 metres.

We can do so simply by using Newton's third law of motion,

Velocity at 150 metre = under root (2500 + 600)

Velocity at 150 meter = 55.7

Maximum height height reached by the model rocket can be find using the equation for max height.

.i.e. maximum height = u × u/2g + initial distance traveled

maximum height = 55.7×55.7/19.6 + 150

maximum height = 156.5 + 150

Maximum height= 300.5 m

Time taken to reach maximum height = time taken before acceleration stops + time after which acceleration stops

Time taken to reach maximum height = 5.7/2 + 55.7/9.8

Time taken to reach maximum height = 2.85 + 5.7

Time taken to reach maximum height = 8.5 seconds

The rocket will be air for the time = time to reach maximum height + time to fall to the ground

The rocket will be air for the time = 8.5+ 7.8

The rocket will be air for the time = 17.3 seconds.

Therefore, the maximum height reached by the model rocket is 300.5 meter, time to reach maximum height is 8.5 seconds and the time for which the model rocket was in air is 17.3 seconds.

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Answer: 0.34 heads

Explanation:

5 smacks = 1 head

1.7 smacks * 1 head/5 smacks=

1.7 * 1/5=

1.7/5=

1.7/5=0.34 heads

The Environmental Justice Movement recognizes that historically environmental burdens are often borne by economic, social and environmental justice.

In order words, it gives fair treatment of justice to its system socially, economically, racially and environmental wise

Environmental justice can simply be defined as the act of being fair to everyone in the environment in aspect of life; be it economically, socially, racially, or even origin wise

This movement of environmental justice is characterized by treating everyone equally regardless of the similarities and differences which exist between nations, countries, individuals, organizations.

For every system who obvserves this impartial movement, they usually, frequently and most of the time gives balanced humanitarian service which helps to promote them in aspect of life as this does not discriminate anyone in any manner

So therefore, the Environmental Justice Movement recognizes that historically environmental burdens are often borne by economic, social and environmental justice.

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Answer:

Explanation:

Because velocity has both magnitude and direction, it is called a vector quantity; acceleration is also a vector quantity and must account for changes in both the magnitude and direction of a velocity.

Answer:

Third law of motion

Explanation:

because his third law states that for every action (force) in nature there is an equal and opposite reaction. so when the wagon is empty you only have to give a less power

please make my answer as brainelist

a. The magnitude of the total force that the cockpit seat exerts on the 76- kg pilot is 288.8 N.

b. The angle between the positive x axis and the total force that the cockpit seat exerts on the 76- kg pilot is 67⁰.

The force exerted on the pilot by the cockpit is calculated as follows;

F = ma

where;

m is mass of the pilot

a is acceleration of the jet

F = 3.8 m/s² x 76 kg

F = 288.8 N

The total force exerted on the pilot is equal to the normal reaction of the pilot.

F = Fn

F = mg cosθ

cos θ = F/mg

cos θ = (288.8) / (76 x 9.8)

cos θ = 0.3878

θ = arc cos (0.3878)

θ = 67⁰

Thus, the magnitude of the total force that the cockpit seat exerts on the 76- kg pilot is 288.8 N.

The angle between the positive x axis and the total force that the cockpit seat exerts on the 76- kg pilot is 67⁰.

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The force between them when they are separated instead by 12 cm is 5 N.

The force between them when charge A is doubled is 40 N.

The force becomes 80 N  if charge B is doubled as well.

The force between two charge is determined from Coulomb's law of electrostatic force.

f = kq²/r²

when the distance, r is double the force reduces by 4;

f = kq²/(2r)²

f =  kq²/4r²

New attractive force when the distance is 12cm, = 20 N/4 = 5 N

f =  k(2q₁)(q₂)/r²

f =  2k(q₁q₂)/r²

New force = 2 x 20 N = 40 N

f =  k(2q₁)(2q₂)/r²

f =  4k(q₁q₂)/r²

New force = 4 x 20 N = 80 N

Thus, the force between them when they are separated instead by 12 cm is 5 N.

The force between them when charge A is doubled is 40 N.

The force becomes 80 N  if charge B is doubled as well.

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