what does a flat horizontal line on a graph mean?
a. the object is moving fast
b. the object is motionless
c. the object is gaining speed
d. the object is moving back to its original position

To operate a mixer circuit , Anne should use a (motor, buzzer, bulb, or battery) to transfer electric energy into motion. She should also use a (switch, resistor, buzzer, or bulb) to start and stop the flow of current.

An electric-powered circuit consists of a device that gives energy to the charged particles constituting the modern-day, consisting of a battery or a generator; devices that use cutting-edge, including lamps, electric cars, or computer systems; and the connecting wires or transmission traces.

An electrical circuit is an interconnection of electrical components or a version of such an interconnection, consisting of electrical elements. an electrical circuit is a network along with a closed loop, giving a go-back direction for the cutting-edge.

An electrical circuit consists of a source of electrical strength, two wires that can convey electric power present day, and a mild bulb. One stop of both the wires is hooked up to the terminal of a mobile at the same time as their free ends are related to the light bulb. the electric circuit is damaged while the bulb is switched off.

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a ) Thermal energy generated by the brakes as a result = 197.4 KJ

b ) In kilocalories = 41 Kcal

KE = 1 / 2 m v²

KE = Kinetic energy

m = Mass

v = Velocity

m = 1350 kg

v = 61.5 km / h = 17.1 m / s

KE = 1 / 2 ( 1350 * 17.1 * 17.1 )

KE = 197376.75 J

KE = 197.4 KJ

To convert a kilojoule value to a kilocalorie value, divide the kilojoule value by 4.814

KE = 197.4 KJ

KE = 197.4 / 4.814

KE = 41 Kcal

Therefore,

a ) Thermal energy generated by the brakes as a result = 197.4 KJ

b ) In kilocalories = 41 Kcal

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The surface can only withstand a pressure Face A (50cm × 30cm) and Face C (50cm × 15cm) as the surface can only withstand a pressure of 0.25 N/cm³.

The physical force used to apply pressure to an object is defined as such. Per square inch of an object, a force is applied perpendicularly to its surface. For pressure, the fundamental formula is F/A. (Force per unit area). The Pascal is the unit of pressure (Pa).

The four different types of pressure are absolute, atmospheric, differential, and gauge pressure. Have you ever noticed that when you use a straw to drink something, the air actually gets suked out? In reality, you're applying "Pressure" as you drink the beverage.

A box has the dimensions of 50 cm × 30 cm × 15 cm

Let each face be A, B and C

The weight of the box = 150 N

Formula for pressure is

P = F/A

To find out which face of the box can withstand a pressure of 0.25 N/cm

we need find the area of each face and find its pleasure

Face A = 50 cm × 30 cm

Area A = l × b

            = 50 × 30

            = 1500 cm²

Pressure A = 150/1500

                  = 0.1 N/cm³

                    0.25 > 0.1

The surface can definitively withstand the pressure of Face A

Face B = 30 cm × 15 cm

Area A = l × b

            = 30 × 15

            = 450 cm²

Pressure A = 150/450

                  = 0.3 N/cm³

                    0.25 < 0.3

The surface could not withstand the pressure of Face B

Face C = 50 cm × 15 cm

Area A = l × b

            = 50 × 15

            = 750 cm²

Pressure A = 150/750

                  = 0.2 N/cm³

                    0.25 > 0.2

The surface can definitively withstand the pressure of Face C

Thus, The surface can only withstand a pressure Face A (50cm × 30cm) and Face C (50cm × 15cm) as the surface can only withstand a pressure of 0.25 N/cm³.

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Answer:

deflate tyres, rock your vehicle forwards and backwards, use traction

Explanation:

time of flight of the book is 0.38 seconds and the range of the book is 1.35 meters, and the final velocity of the book is 5.4 m/s

What is projectile motion?

The path followed by a projectile is known as projectile motion, when we throw any object in the air it follows a certain trajectory and that trajectory is known as projectile motion.

What is the time of flight?

Every projectile remains in the air for a certain period of time the amount of time the projectile space in the air is known as time of flight for the same velocity with different angles the time of flight can vary.

given:

initial velocity in y axis = 3.5m/s

initial velocity in x axis = 0 m/s

height of the disk = 75 m

acceleration due the gravity 10 m/s²

range of the projectile = velocity in y direction × time of flight

so first we will deduce time of flight,

time of flight for both the motion in x axis and y axis is the same therefore, we will find the time of flight in x axis.

using newtons second law of motion we get,

s = u × t + 0.5 × a × t²

here,

s is the displacement in x axis

u is the initial velocity

t is the time of flight

a is acceleration due to gravity

substituting value on newtons second law of motion we get,

0.75 = 0 + 0.5 × 10 × t²

t² = 0.15

t = 0.38 seconds

therefore, the time of flight is 0.38 seconds

range of the book = velocity in y direction × time of flight

range of the book = 3.5 × 0.38

range of the book = 1.35 meters

velocity of the book as it touches the ground = 10 × 0.38 × 1.41

velocity of the book as it touches the ground = 3.8 × 1.41 m/s

velocity of the book as it touches the ground = 5.4 m/s

therefore, time of flight of the book is 0.38 seconds and the range of the book is 1.35 meters, and the final velocity of the book is 5.4 m/s

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The new speed with respect to the ground is 512 m/h.

We can tell that is speed is the rate at which the velocity changes with respect to time. In this case, we can see that the jet airliner moving initially at 103 mph (with respect to the ground) to the east moves into a region where the wind is blowing at 441 mph in a direction 19° north of east.

Hence;

→ The east component =  103 + 441 cos(52) = 375 m/h

→ The north component = 441 sin(52) = 348  m/h

We can now get the new velocity by the use of;

√( 375)^2 + (348)^2 =

= 512 m/h

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According to the given statement The induced voltage opposing this is 3.60 V.

Electrons transport electrical energy through conducting materials (like power lines). The voltage of the transmission line gauges the amount of potential energy that each electron is transporting along the power line. Voltage, in other terms, is the force that forces current through the electrical supply network.

Magnitude of change in current, dI = 4.00 A as current reduces to zero

Inductance of the inductor, L = 7.50 mh = 7.50 *10⁻³

Time elapsed dt = 8.33 ms = 8.33 * 10⁻³

The induced emf is given by replacing the specified values with:

[tex]\epsilon=L \frac{d I}{d t}[/tex]

=7.50 *10⁻³H * (4.00 A / 8.33 * 10⁻³)

= 3.60 V

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Short-circuit evaluation is only performed with the AND and OR operators.

Therefore, the given statement is False.

Short-circuit evaluation is another function of the logical OR operator; if the left-hand operand is true, the right-hand expression is not tested. The Boolean AND and OR operators short-circuit evaluate; that is, they only evaluate the expression to the right of the operator when it is required to ascertain the expression's final outcome. Short-circuit operators establish a sequence point because they fully assess the first argument, including any side effects, before (optionally) processing the second argument in imperative languages (particularly C and C++), where side effects are significant.

A programming concept known as short-circuiting allows the compiler to omit some logical expression sub-expressions execution or evaluation. As soon as the expression's value is established, the compiler halts evaluating the following subexpressions.

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The correct answer is 49 minutes. Option A.

A destination can describe where you are going. Travelers destined for Paris or any place is known for a particular purpose. B. A hip new music club for indie rock fans. A place where someone goes, or where something is sent or received. We arrive at our destination, tired and hungry.

The package arrived at its destination two days later. He likes to travel to remote and exotic places. By the time he reached his final destination, he passed through three states. A tourist destination is a city town or other area that is heavily dependent on tourism revenue or a rural city or place that is marketed as a tourist destination or markets itself.

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Answer:

1loaf = 435litres of water

3loaf = 3045 litres of water

1305

a) the acceleration of the car = -2.75 m/s

b) d = 198 meters. Therefore, the squirrel would survive.

c) the car moving at 100 meters with a speed of 23.22m/s

What is acceleration ?

acceleration: the rate at which the speed and direction of a moving object vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates. Even if the speed is constant, motion on a circle accelerates because the direction is always shifting. Both effects contribute to the acceleration for all other motions.

Use the kinematic equation to solve for the acceleration:

v = u +at

v = final velocity

u = initial velocity

a = acceleration

t = time

In this instance, the final velocity is 0 because he comes to a stop. We can solve for the acceleration by plugging in the given values:

0 = 33 + (12)a

0 = 33 + 12a

-33 = 12a

-33 / 12 = a  --> a = -2.75 m/s²

b) Find the amount of distance necessary to stop. Use the formula:

v^2 = u^2 + 2ad

d = distance

Plug in the values:

0² = 33² + 2(-2.75 · d)

0 = 1089 - 5.5d

-1089 = -5.5d

d = 198 meters. Therefore, the squirrel would survive.

c)

Find the velocity at 100 meters by using the same formula as before:

v^2 = u^2 + 2ad

However, in this instance, we are solving for the final velocity. Plug in the given points to solve:

vf² = 33² + 2(-2.75 · 100)

vf² = 1089 + (-550)

vf² = 539

vf = √539

vf ≈ 23.22 m/s.

the car moving at 100 meters with a speed of 23.22m/s

a) the acceleration of the car = -2.75 m/s

b) d = 198 meters. Therefore, the squirrel would survive.

c) the car moving at 100 meters with a speed of 23.22m/s

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The velocity of the car travelling at 15 m/s for 10 second speeding up with constant acceleration of 2m/s^2 for 15 second is 45 m/s.

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Copper has 2 isotopes Cu-63 and Cu-65. Cu-63 has an abundance of 69.15% while Cu-65 has an abundance of 30.85%, then the average atomic mass of the copper would be  63.167 grams.

It is the sum of the mass of all the protons as well as the neutrons that are present inside the nucleus.

Atomic mass = mass of protons + mass of neutrons

As given in the problem Copper has 2 isotopes Cu-63 and Cu-65. Cu-63 has an abundance of 69.15% while Cu-65 has an abundance of 30.85%.

The average atomic mass of the copper = 63*0.6915 +65*0.3085

                                                                    =63.167 grams

Thus, the average atomic mass of copper would be 63.167 grams.

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The relative density of lead is 11.3 . If the density of water is 1000 kg / m³, then the density of the lad would be 11300 Kg / m³.

It can be defined as the mass of any object or body per unit volume of the particular object or body.

ρ = m /v

As for the given problem, The relative density of lead is 11.3. The density of water is 1000 kg / m³, then the density of the lad would be 11300 Kg / m³

The density of the lead = Relative density of lead × density of water

                                = 1000 × 11.3

                                =11300 kg / m³

Thus, the density of the lad would be 11300 Kg / m³ .

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Two representations that are most consistent with the model of an atom that uses probability to locate electrons are :

1. Quantum mechanical model

2. Bohr's model

The probability of an electron is represented as electron probability function and is written as - 4πr2drψ2, where ψ is complex conjugate. The quantum mechanical model explains the probability of finding an electron in the three-dimensional space around the nucleus. It is based on solutions of the Schrödinger equation. The Schrödinger model assumes that the electron is a wave and  describes the space regions where electrons are most likely to be found.

The energy E of the quantum is related to the frequency ν by E = hν, where h is Planck's constant.

Bohr's model consists of a small nucleus that is positively charged and surrounded by negative electrons moving around the nucleus in the orbit. Bohr found that an electron positioned away from the nucleus has more energy than the electron which is closer to nucleus.

l = nh /2π  ; where,

l= angular momentum

n= principal quantum number

h=Planck's constant

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This type of system is a third class lever. FEL where fulcrum, effort and load comes in an arrangement.

Lever  is a simple machine in which the fixed arms are arranged at a fixed point known as fulcrum. There are three types of lever system: first class Lever system, second class lever system and third class lever system. In the first class lever system there is an arrangement like the see saw. In this arrangement the fulcrum is in center and both the arms are like a seesaw. In the second class lever system, output force was between input force and fulcrum. In the third class lever system input force is between output force and fulcrum. 

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the basic principles of exercise  is seen as the reasons why training frequently and regularly is crucial if you as a person want to enhance your performance and they are due to the principles of specificity, also progression, overload, adaptation, as well as reversibility. It  apply to walking as it helps to improve balance.

The most crucial idea in exercise is thought to be the overload principle. Simply put, it indicates that your body will adjust to the demands you place on it.

For instance, physiological changes will occur when you lift a large weight that you haven't done before or when you finish a strenuous aerobic workout that places new demands on your heart and lungs, making it easier for you to do this the following time.

Your cardiovascular system is gradually revved up during a warmup by increasing body temperature and boosting blood flow to your muscles.

Warming up may also assist lower injury risk and muscular discomfort. After working out, you should cool down to allow your heart rate and blood pressure to gradually return to normal.

A Good Warm-Up and Cool-Down tips are:

Before stretching, all the muscles need is five to ten minutes of gentle exercise, like a brief walk. After an aerobic or weight-training activity, you can stretch as well.

Lastly, The good stretches for walkers are:

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Answer:

With new information you can form a new hypothesis.

Explanation:

The driver takes 1.43s in air. the horizontal range is 2.86m .the final vertical velocity is -14.014m/s.

It is the distance travelled by the projectile in the horizontal direction.

it is defined as the rate of change of displacement in a unit second.

unit of velocity is m/s.

mathematically,

v=s/t

Given,

A driver jumps off the 10 meter platform at a swim competition.

They are moving 2 m/s horizontally as they leave the diving platform.

Thus, Height = h = 10 m

initial velocity = u = 2m/s

Thus, according to the formula of time of descent if projectile fired horizontally,

t =√(2h/g)

t = √ {(2×10)/9.8}

t= 1.428 s

t = 1.43s

According to the formula of horizontal range,

x = u×√(2h/g)

x = u×t

x = 2×1.43 = 2.86m

According to the formula of vertical velocity,

v = -gt

v= -(9.8×1.43)

v = -14.014m/s

Hence, the driver takes 1.43s in air. the horizontal range is 2.86m .the final vertical velocity is -14.014m/s.

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Answer:

20n

Explanation:

20 n

The external force with a horizontal component will not act on the cart's man and the sum of the vertical forces is zero, so the system's total momentum is conserved.

What is external force?

External forces are those that come from how the body interacts with its surroundings.

There are contact forces and non-contact forces that come from the outside. Most of the forces used in biomechanics are contact forces. Contact forces are forces that happen when two things touch each other. Non-contact force happens when two things are not in direct with each other e.g., gravitational force

What is momentum?

Momentum is the product of a particle's mass and speed. Momentum is a "vector quantity," which means that it has both size and direction.

Let mc be the mass of the cart, ν  be its initial velocity, and νc be its final velocity (after the man jumps off). Let mm be the mass of the man. His initial velocity is the same as that of the cart and his final velocity is zero. Conservation of momentum yields (mm+mc) ν = mcνc. Consecutively the final speed of the cart is:

vc = v(mm+mc)/mc = (2.3m/s)(75kg+39kg)/39kg) = 6.7m/s

Hence, the cart goes faster by 6.7m/s–2.3m/s, which is +4.4m/s. To slow himself, the man causes the cart to push him backward by pushing forward on it, so the cart speeds up

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The distance travelled by the car and the velocity of the car, both will increase weather the mass increases or not.

Let us say that there is a horizontal surface inclined at an angle A, the acceleration is g(acceleration due to gravity) and the car is going down the inclined.

Let us say that the mass M of the car is increasing constantly.

Now, we know, because the inclined is at an angle, so the component of g that will be in the direction of the motions is gsinA.

This component of acceleration not going to change, so the acceleration is now constant.

As there is some acceleration, that too in the direction of the motion, so the velocity of the car will increase constantly regardless of the mass until it reaches the final maximum value.

Because the velocity of the car is increasing so obviously the distance will also increase.

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The price floor benefits farmers as price floor would provides some security in agricultural income.

What is price floor?

The lowest permitted price that can be paid in marketplaces for commodities and services, labor, or financial capital is known as a price floor. The minimum wage, which is founded on the normative idea that someone performing a full-time job should be able to afford a basic level of living, is maybe the best-known example of a price floor.

Price floors raise the price above the equilibrium price, which generates surpluses. The quantity delivered surpasses the quantity demanded at the price determined by the floor. Price floors in agriculture have led to enduring surpluses of a variety of agricultural goods.

For farmers these price floors thus give them a sense of financial security that all of their crops will atleast get that minimum price and thus he will be able to earn some money.

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The Total time taken for the signal to be transmitted and received after reflecting is 0.261 seconds.

Speed of sound in seawater = 1530m/s.

Total distance travelled by the sound = 200m [ toward fish ] + 200m [ away                                                                                                            from fish ]

Total distance = 400m

As, Speed = [tex]\frac{ Total Distance}{Total Time}[/tex]

     Total Time = [tex]\frac{Total Distance}{Speed}[/tex]

     Total Time = [tex]\frac{400}{1530}[/tex]

  ∴ Total time = 0.261 second

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The helicopter's horizontal distance from the point of takeoff is 979 m after the two legs.

For the first leg,

The length of the path is d = 294 m and the helicopter takes off at an angle of θ = 59.4°

Then,

dₓ = d cos θ

dₓ = 294 × cos 59.4°

dₓ = 147 m

For the second leg,

The length of the path is:

d = 849 m

and the angle of flight is θ = 10.5°.

So,

dₓ = d cos θ

dₓ = 849 × cos 10.5°

dₓ = 832 m

Therefore,

The total horizontal distance will be:

= dₓ ( 1st leg ) +  dₓ ( 2nd leg )

= 147 + 832

= 979 m

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Energy is conserved by energy being transformed through one form or different forms.

Energy can change from one form to another, but cannot be destroyed.

Energy cannot be created or destroyed.

Similar to this, according to the rule of conservation of energy, energy cannot be generated or destroyed. For instance, kinetic energy is converted to potential energy when a toy vehicle is rolled down a ramp and collides with a wall.

There are three fundamental quantities in mechanics that are preserved. They are power, forward motion, and angular momentum. It can come as a surprise to you that energy is a conserved quantity if you've read instances in prior pages, such the kinetic energy of charging elephants.

Solar heat energy from the sun is used by us.

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Answer:

Cellular respiration involves the complete breakdown of glucose in presence of oxygen gas to yield carbon dioxide ,water , and energy in the form of atp

ANSWER

EXPLANATION

To find the centripetal acceleration, we have to apply the formula for centripetal acceleration:

where v = velocity of the vehicle

r = radius of the circular path

Therefore, the centripetal acceleration is:

That is the answer.