Explain how Newton’s third law describes the motion of a rocket. How could this apply to the motion of a robot on ice?

Explanation:

When you pull the sock off of the blanket, the socks gain electrons out of blanket. This makes socks slightly negatively charged. The potential energy of the socks rise whereas potential energy of the blanket reduces. This happens because of exchange of electrons between socks and blanket.

Answer:

Physics is the branch of science concerned with the nature and properties of matter and energy. The subject matter of physics, distinguished from that of chemistry and biology, includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms. And a more detailed working definition of physics may be: The science of nature, or that which pertains to natural objects, which deals with the laws and properties of matter and the forces which act upon them. Quite often, physics concentrates upon the forces having an impact upon matter, that is, gravitation, heat, light, magnetism, electricity, and others.

Physics helps us to understand how the world around us works, from can openers, light bulbs and cell phones to muscles, lungs and brains; from paints, piccolos and pirouettes to cameras, cars and cathedrals; from earthquakes, tsunamis and hurricanes to quarks, DNA and black holes. Physics helps us to organize the universe. It deals with fundamentals, and helps us to see the connections between seemly disparate phenomena.

Physics provides quantitative and analytic skills needed for analyzing data and solving problems in the sciences, engineering and medicine, as well as in economics, finance, management, law and public policy. Physics is the basis for most modern technology, and for the tools and instruments used in scientific, engineering and medical research and development. Manufacturing is dominated by physics-based technology.

To understand the fundamental principles of the universe, physics utilizes many workings from the other natural sciences. Because of this overlap, phenomena studied in physics (conservation of energy for example) are common to all material systems. The specific ways in which they apply to energy (hence, physics) are often referred to as the "laws of physics." Because each of the other natural sciences biology, chemistry, geology, material science, medicine, engineering, and others, work with systems which adhere to the laws of physics, physics is often referred to as the "fundamental science."

Answer:

Physics can be important in understanding the world and how it works. The  main goal of physics is to understand how the universe behaves.

Explanation:

Answer:

Power = 2.45Kw or 2450 Watts.

Explanation:

Given the following data;

Mass, m = 250kg

Height, h = 2m

Time, t = 2secs

We know that acceleration due to gravity, g is equal to 9.8m/s²

Power can be defined as the energy required to do work per unit time.

Mathematically, it is given by the formula;

\( Power = \frac {Energy}{time} \)

But Energy = mgh

Substituting into the equation, we have

\( Power = \frac {mgh}{time} \)

\( Power = \frac {250*9.8*2}{2} \)

\( Power = \frac {4900}{2} \)

Power = 2450 Watts

To convert to kilowatt (Kw), we would divide by 1000

Power = 2450/1000

Power = 2.45Kw.

Therefore, the average power output of the weightlifter is 2.45 Kilowatts.

The average power output of the weight lifter who can lift the given mass is 2450 Watts.

Given the data in the question;

Power is the amount of energy transferred per unit time. It is expressed as:

\(P = \frac{W}{\delta t}\)

Where W is work done and t is elapsed time.

So, we find the work done

Work done = Force × Displacement

Since Force = Weight = m × g

Where g is acceleration due to gravity ( \(9.8m/s^2\) )

Hence

\(Work\ done = mg * d\\\\Work\ done = 250kg\ *\ 9.8m/s^2\ *\ 2.0m\\\\Work\ done = 4900kg.m^2/s^2\)

We substitute our value into the previous equation

\(P = \frac{Work\ done}{\delta t}\\\\P = \frac{4900kg.m^2/s^2}{2.0s} \\\\P = 2450kg.m^2/s^3\\\\P = 2450J/s\\\\P = 2450W\)

Therefore, the average power output of the weight lifter who can lift the given mass is 2450 Watts.

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Protein-energy malnutrition is the condition linked to poverty, insufficient food intake, poor food quality, unsanitary living conditions, and improper feeding of infants and young children. The correct option is 4.

Protein-energy malnutrition (PEM) is a type of malnutrition that occurs when there is a deficiency in both protein and energy (calories) intake. It is often associated with impoverished and disadvantaged populations who lack access to an adequate and balanced diet. PEM can lead to severe health consequences, including stunted growth, weakened immune system, and increased susceptibility to infections and diseases.

Efforts to combat PEM include improving food security, promoting better nutrition practices, and enhancing access to essential nutrients through supplementation and fortification of food. Addressing poverty, improving living conditions, and ensuring proper healthcare and education are also crucial in preventing and treating protein-energy malnutrition in vulnerable populations.

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The scaled diameters of the missing planets are listed below:

Mercury                      1.4 cm

Venus                        3.3 cm

Mars                           1.9 cm

Jupiter                     39.2 cm

Saturn                      33.1 cm

Uranus                     14.0 cm

Neptune                  13.6 cm

In this question we must use conversion factor to calculate the scaled diameters by means of the following direct relationship:

d = k · D     (1)

Where:

The conversion factor is found by using the real and scaled diameter of the Earth:

k = 3.5 cm/12,756 km

k = 7/25512 cm/km

Then, we determine the scaled diameters of the rest of planets:

Mercury                      1.4 cm

Venus                        3.3 cm

Mars                           1.9 cm

Jupiter                     39.2 cm

Saturn                      33.1 cm

Uranus                     14.0 cm

Neptune                  13.6 cm

The statement reports a table with numerous mistakes, the correct table is shown below:

Planet               Diameter (km)             Scaled Diameter (cm)

Mercury                  4,879

Venus                    12,104

Earth                      12,756                                    3.5

Mars                        6,792                                    

Jupiter                 142,984

Saturn                120,536

Uranus                    51,118

Neptune               49,528

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Answer:

Battery Voltage

Explanation:

Voltage refers to the amount of electrical potential your battery holds. The standard automotive battery in today's vehicles is a 12-volt battery. Each battery has six cells, each with 2.1 volts at full charge. A car battery is considered fully charged at 12.6 volts or higher. hope this helps you :)

Answer:

3 V

Explanation:

e d g e n u i t y

The neutral conductor in a 4-wire, 3-phase, wye-connected circuit carries the unbalanced load current when the load isn't entirely symmetrical.  

The neutral conductor carries zero current in a perfectly balanced three-phase system. The sum of the three phase currents equals zero, and the neutral conductor's current is therefore equal to zero. However, when the load isn't entirely symmetrical, the sum of the three phase currents isn't equal to zero, and the neutral conductor carries current, known as the unbalanced load current.The majority of the load in electric discharge lighting, data processing, and other similar loads are single-phase loads. As a result, in a 3-phase system, the neutral conductor carries the unbalanced load current produced by single-phase loads in these applications. The neutral conductor's size in a 4-wire, 3-phase, wye-connected circuit is based on the highest single-phase load and not the sum of all three phases. If the highest single-phase load is unknown, then the neutral conductor size should be based on the sum of all three phases.

A neutral conductor carries the unbalanced load current in a 4-wire, 3-phase, wye-connected circuit when the major portion of the load is electric discharge lighting, data processing, and other loads where the neutral conductor carries single-phase loads. If the load is balanced, the neutral conductor carries no current. However, if the load is unbalanced, the neutral conductor's size is determined by the highest single-phase load, not the sum of all three phases.

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Explanation:

Average speed =total distance ÷ total time

speed = d ÷ t

d= 74400

t= 16

then,

speed = 74400÷16

=4650

The First Law of Thermodynamics which states that the change in internal energy of a system is equal to the heat transferred into the system minus the work done by the system. Mathematically, it can be represented as ΔU = Q - W

where ΔU is the change in internal energy, Q is the heat transferred into the system, and W is the work done by the system
In this case, we know that the internal energy of the system decreases by 125 J and the system performs 30.5 J of work. Therefore, we can write:
ΔU = -125 J
W = -30.5 J (since work is done by the system, it is negative)
Substituting these values in the first law equation, we get:
-125 J = Q - (-30.5 J)
Simplifying this, we get:
Q = -125 J - (-30.5 J)
Q = -94.5 J

Since the heat transferred into the system cannot be negative (it represents energy added to the system), we take the absolute value of Q is 94.5 J

Therefore, 94.5 J of heat is transferred into the system when its internal energy decreases by 125 J while it was performing 30.5 J of work.

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Answer:

the stars which are red in color are cool.

Explanation:

The stars which has reddish color are cool in nature while those stars which has white and blue in color are very hot in nature. The stars change its color when they becomes hotter , first the star color reddish when they are cool but with increasing temperature it changes the color from reddish to orange then yellow. After yellow it turns green and finally get blue color when the stars are very very hot.

Answer:

The Force of Friction!

Explanation:

I hope I could help you, Brainliest please!

Example of an elastic product: Smartphone

Explanation: A smartphone is an example of an elastic product. When the price of smartphones decreases, consumers tend to buy more of them, and when the price increases, consumers tend to buy fewer.

Example of an inelastic product: Prescription medication

Explanation: Prescription medication is an example of an inelastic product. Inelastic goods are those for which changes in price have little impact on the quantity demanded.

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The expression for the block's centripetal acceleration is derived as ω²r or v²/r.

The centripetal acceleration of an object is the inward or radial acceleration of an object moving in a circular path.

The expression for the block's centripetal acceleration is derived as follows;

ω = dθ/dt

where;

ac = ω²r

where;

Also, ω = v/r

ac = (v/r)²r

ac = v²/r

Thus, the expression for the block's centripetal acceleration is derived as ω²r or v²/r.

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The acceleration due to gravity on that planet is 6.13 m/s², if the height of drop of wrench is 1.52 m and time is 0.705 seconds.

Initial velocity of the wrench, u = 0   [initially at rest]

Height travelled by the wrench, h = 1.52 m

Time taken to travel through 1.52 m height, t = 0.705 sec

Let the acceleration due to gravity at that planet is g.

By the second equation of motion,

h = ut + 0.5gt²

1.52 = 0 × t + 0.5 × g × 0.705²

1.52 = 0.248g

g = 1.52/0.248

g = 6.13 m/s²

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The balloon will go upward with acceleration of 3.1 m/s².

The upward force applied to an object that is fully or partially submerged in a fluid is known as the buoyant force. Upthrust is another name for this upward thrust. A body submerged partially or completely in a fluid appears to lose weight, or to be lighter, due to the buoyant force.

Given that

Mass of the balloon = 80 g = 0.080 kg.

Volume of the balloon = 0.3 m³.

So, weight of the balloon =  0.080 × 9.8 N = 0.784 N.

Buoyant force acting on the balloon = 0.3 × 0.35 × 9.8 N = 1.029 N.

Hence, net upward force acting on the balloon is =   1.029 N -  0.784 N =  0.248 N.

So, upward acceleration of the balloon = 0.248/0.080 m/s² = 3.1 m/s².

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It requires 288 joules of heat to raise the temperature of a 225-g lead ball from 15.0°C to 25.0°C.

The formula to calculate the amount of heat, Q required to raise the temperature of an object is:

Q = mcΔT

Where:

Q = the amount of heat (in joules, J)

m = the mass of the object (in kilograms, kg)

c = the specific heat capacity

ΔT = the change in temperature

In this problem, we are given:

m = 225 g = 0.225 kg

ΔT = (25.0°C - 15.0°C) = 10.0°C

c = 128 J/kg*K

plugging in the values

Q = mcΔT

Q = (0.225 kg)(128 J/kg*K)(10.0°C)

Q = 288 J

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Answer:

0.645% of the mass is carried out when nuclear fusion takes place

Explanation:

In the predator-prey relationship between eagles and rabbits, the larger the population of rabbits, the more the number of eagles the rabbit population can support.

A predator-prey relationship is a relationship between two organisms in which one organism kills the other for food.

The organism that kills the other for food is the predator.

The organism that is killed for food is the prey.

In the relationship between eagles and rabbits, the eagles are the predators while the rabbits are the prey.

The larger the population of rabbits, the more the number of eagles the rabbit population can support.

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The earth connection offers protection in case of an electrical fault.

An electric circuit is a path provided for the flow of current. Usually metallic conductors carry electric current in a circuit. Circuits have an earth connection. The essence of the earth connection is to provide protection from possible electric shocks. The earth connection provides a pathway by which current can flow to the earth in event of a fault in the circuit.

Hence, from the statement in the reason and assertion, we can conclude that the reason is an explanation for the assertion in the question.

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Answer: (a) The velocity of the ball at its highest point is 10.12 m/s

              (b) The height that the ball goes is 1.13 m.

Mass of ball, m = 0.48 kg

Initial velocity, u = 8.8 m/s

Initial angle, θ = 36°

Using the principle of conservation of energy, the final velocity at the highest point can be found. The potential energy of the ball is converted into kinetic energy at its highest point, where the ball will stop momentarily. Then, we know that the total energy at the top will be equal to the potential energy at the beginning. That is, Initial Potential Energy + Initial Kinetic Energy = Final Potential Energy∴

mgh + 1/2mu² = mgh(max) where h(max) is the maximum height the ball attains. At this point, the kinetic energy will be zero. Therefore,0.5mv² + mgh = mgh(max). Since the kinetic energy of the ball at the top is zero, the total energy at the top of the projectile’s trajectory is the potential energy at the start of the trajectory, which is mgh.∴ v = √(2gh).

This is the velocity at the maximum height.

(a) Speed at its highest point:

Initial velocity of ball, u = 8.8 m/s

Angle made with horizontal, θ = 36°

The vertical component of velocity, v_y = usinθv_y = 8.8 sin 36°v_y = 5.0 m/s

Now using the formula, v = √(u² + v_y²)v = √(8.8² + 5.0²)v = √(77.44 + 25)v = √102.44v = 10.12 m/s

Therefore, the velocity of the ball at its highest point is 10.12 m/s

(b) How high does it go: lets calculate the potential energy at the initial position. Potential energy, Ep = mgh

Ep = 0.48 * 9.8 * 0Ep = 0 J. The total energy at the top will be equal to the potential energy at the beginning. That is, Initial Potential Energy + Initial Kinetic Energy = Final Potential Energy∴ mgh + 1/2mu² = mgh(max). Substituting the values,0.48*9.8*h(max) + 0.5*0.48*8.8² = 0.48*9.8*0hmax = (0.5*0.48*8.8²)/(0.48*9.8)h(max) = 1.13 m.

Therefore, the height that the ball goes is 1.13 m.

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The tension in the cable is 4361 N, directed upwards. The force exerted by the wall on the steel bar is 4361 N, directed towards the wall.

To solve this problem, we can analyze the forces acting on the system and apply the principles of equilibrium.

Let's consider the forces acting on the system:

Weight of the object (360 kg) acting downward.

W_object = m_object * g

W_object = 360 kg * 9.8 m/s² (acceleration due to gravity)

W_object = 3528 N

Weight of the bar (85 kg) acting downward.

W_bar = m_bar * g

W_bar = 85 kg * 9.8 m/s²

W_bar = 833 N

Tension in the cable (upward force).

We'll denote this as T.

Force exerted by the wall on the steel bar (horizontal force).

We'll denote this as F_wall.

Since the system is in equilibrium, the sum of the forces in the horizontal direction and vertical direction must be zero.

In the horizontal direction:

F_wall = 0 (because there is no horizontal acceleration)

In the vertical direction:

T + W_object + W_bar = 0

Considering the torques, we can use the principle of moments to determine the relationship between the forces and their distances from the pivot point.

The torque due to the object can be calculated as:

τ_object = W_object * d_object

where d_object is the horizontal distance of the object from the pivot point.

The torque due to the bar can be calculated as:

τ_bar = W_bar * d_bar

where d_bar is the horizontal distance of the bar from the pivot point.

The torque due to the tension in the cable can be calculated as:

τ_tension = T * d_tension

where d_tension is the horizontal distance of the cable attachment from the pivot point.

Since the system is in rotational equilibrium, the sum of the torques must be zero:

τ_object + τ_bar + τ_tension = 0

Substituting the expressions for the torques:

W_object * d_object + W_bar * d_bar + T * d_tension = 0

We know that:

Length of the steel bar (d_bar) = 15 m

Horizontal distance of the cable attachment from the lower end of the bar (d_tension) = 5.0 m

Substituting the values into the equation:

3528 N * d_object + 833 N * 15 m + T * 5.0 m = 0

Now, we can solve for d_object:

3528 N * d_object = -833 N * 15 m - T * 5.0 m

d_object = (-833 N * 15 m - T * 5.0 m) / 3528 N

Now, let's solve for T using the equation in the vertical direction:

T + 3528 N + 833 N = 0

T = -4361 N

To find the force exerted by the wall on the steel bar (F_wall), we can substitute the value of T into the equation in the horizontal direction:

F_wall = 0

F_wall = T

F_wall = -4361 N

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Answer:

10000 Bq / 625 Pq = 16

Radioactivity has decreased by a factor of 16

2^4 = 16

So the sample has gone thru 4 half-lives

24 da / 4 = 6 da

6 da is the half-life

Answer:

Explanation:

What is a free body diagram?

Answer: a force diagram is a graphical illustration used to visualize the applied forces and resulting reactions on a body in a given condition

Drawing a free-body diagram for this problem

Answer: Look at the attached picture, ask me any questions if you are still confused. It is a little messy since I didn't have my pen.

Find its weight on Earth

Answer: The weight is dependent on the mass of the object and the gravitational constant on the planet. The gravitational constant, in this case, is 9.8.

   so the weight = mass * gravitational constant = m * g = 1000 * 9.8

                          = 9800 N

Hope that helps!

answer :

Visible: Our eyes detect visible light. Fireflies, light bulbs, and stars all emit visible light. Ultraviolet: Ultraviolet radiation is emitted by the Sun and are the reason skin tans and burns. "Hot" objects in space emit UV radiation as well.

Which objects emit electromagnetic waves?

All objects emit electromagnetic radiation according to their temperature. Colder objects emit waves with very low frequency (such as radio or microwaves), while hot objects emit visible light or even ultraviolet and higher frequencies.

Answer:

fem = -0.126 V

Explanation:

Faraday's law is

          fem =  \(- \frac{d \phi}{dt}\)

where the flow is

          Ф = B . A = B A cos θ

bold letters indicate vectors.

In this case, the normal to the area is parallel to the magnetic field, so the angle is zero and the cos0 = 1

           fem = \(- A \ \frac{dB}{dt}\)

in this case they indicate that to carry the loop from outside to inside the field in Δt = 5 s, so we can change them by variations

           fem = \(- A \frac{\Delta B}{\Delta t}\)

let's calculate

           fem = - 0.7 (0.9 -0) / 5

           fem = -0.126 V

Answer:

The options are not given, so i will answer in a really general case.

There are two equations that describe how mass affects the motion of an object.

The most generical one, Newton's second equation of motion.

This says that:

F = m*a

Force equals mass times acceleration.

Remember that acceleration tells us how the motion of an object changes as time passes.

So if we isolate the acceleration we get:

a = F/m

Here you can see that the mass is in the denominator, so, for a fixed force F, if we increase the mass of the object, the acceleration will decrease, which means that as more mass has an object, "harder" is to accelerate it.

Now from an energy point of view.

The kinetic energy (the motion energy of a moving object) is written as:

T = (1/2)*m*(v^2)

where:

m = mass

v = velocity.

Here, for a fixed velocity v, if we increase the mass, we also increase the kinetic energy.

This means that if we have two objects, one with a small mass m, and the other with a larger mass M, and we want to give both objects the same velocity v, we will need more energy for the object with more mass.

So in general we can conclude that mass "opposes" to the motion.

Now, we also can define the term "testable"

A hypothesis is testable if we can think of an experiment to test it, if there is no experiment, then the hypothesis is not testable.