A rocket accelerates steadily for 2 minutes with an acceleration of 0.3m/s2. If the rocket started at rest, what is its final speed? ​

Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 84 × 6.4

We have the final answer as

Hope this helps you

Answer:

shirt is little attached to the body, it can come off and fly away

Explanation:

In electrostatics, charges of different signs attract and charges of the same sign repel.

In this case, when a negative charge is placed on it, both the inventor and the shirt are charged, therefore there is a repulsive force, also there is an attraction between the positive charge of the roof attracts the negative charge, such as the shirt. of weak the two forces not greater than the resistance of the walk.

As the shirt is little attached to the body, it can come off and fly away

Answer:

Attraction

Explanation:

Nucleus has a positive charge. Electron has a negative charge. Opposite charges attract and equal charges repel

The electrical interaction between the nucleus and the orbital electron is a force of attraction.

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Answer:

v = 4.79 10³ m / s

Explanation:

For this exercise we will use the universal law of gravitation and Newton's second law

          F = G M m / r²

where G is the gravitational constant, m the mass of the satellite, M the mass of the Earth, r the distance from the center of the planet to the satellite

           F = m a

since the satellite has a circular path, the acceleration is centripetal

          a = v² / r

we substitute

          G M m / r² = m v² / r

           G M / r = v²

We calculate

          v² = 6.67 10⁻¹¹ 5.98 10²⁴ / 6.96 10⁶

          v = √ (22.94 10⁶)

          v = 4.79 10³ m / s

Answer:

7570 m/s

Explanation:

take the square root of: 6.67E-11× 5.98E24/6.96E6

The expression for the energy stored (E) in a stretched wire of original length (L), cross-sectional area (A), tension (T), and Young's modulus (Y) is given by E = Y * e * ln(L) * A

The work done to stretch the wire can be calculated by integrating the force applied over the displacement. In this case, the force applied is the tension (T) in the wire, and the displacement is the change in length (ΔL) from the original length (L) to the stretched length (L + ΔL).

The tension in the wire is given by Hooke's law, which states that the tension is proportional to the extension of the wire:

T = Y * (ΔL / L)

where Y is the Young's modulus of the material of the wire.

Now, let's calculate the work done to stretch the wire:

dW = T * dL

Integrating this expression from L to L + ΔL:

W = ∫ T * dL = ∫ Y * (ΔL / L) * dL

W = Y * ΔL * ∫ (dL / L)

W = Y * ΔL * ln(L) + C

Here, C is the constant of integration. Since the energy stored in the wire is zero when it is unstretched (ΔL = 0), we can set C = 0.

Finally, the expression for the energy stored in the wire (E) is:

E = W = Y * ΔL * ln(L)

or, if we substitute the cross-sectional area (A) and strain (e) of the wire, where e = ΔL / L:

E = Y * e * ln(L) * A

Thus, the expression for the energy stored (E) in a stretched wire of original length (L), cross-sectional area (A), tension (T), and Young's modulus (Y) is given by:

E = Y * e * ln(L) * A

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To heat a 1200 sq ft house with natural gas, we spend a total of $14.40 per day.

How much it costs to heat a 1200 sq ft house with natural gas relies on a number of things, such as where the house is, how well it heats, and how much natural gas costs in that area.

Sources. says that the cost per square foot for natural gas with 40 BTU is $0.00049836 per square foot per hour. If our house is 1200 square feet, we multiply this cost by 1200 and get $0.60 per hour to heat it. That means that to heat a 1200 sq ft house with natural gas, we spend a total of $14.40 per day.

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Answer:

Alkali Metals

Explanation:

If the first column of elements is what your talking about , they're the Alkali Metals .

:)

Answer:

The first group (1A)  of elements are classified as Alkali metals.

Answer:

u =0m/sec

acceleration = 5 m/s ^2

s = 4.75m

by using the third equation of motion

v^2 - u.^2 = 2as

v^2 - 0 = 2 * 0.5 * 4.75

so v^2 = 4.75

so v = 2.17m/sec

this is the answer

Answer:

Using a template feature can streamline the creation and setup of radius. Templates are pre-designed layouts that can be easily customized to fit a particular need. By using templates for creating radius, one can save time and effort by not having to start from scratch every time. Templates also ensure consistency in design and functionality, which is crucial for user experience. Additionally, templates can be easily modified and updated, ensuring that the radius remains up-to-date with the latest design trends and technological advancements. Therefore, utilizing templates feature can significantly improve the efficiency and productivity of radius creation and setup.

Explanation:

I apologize if I did not answer this question correctly. If you would like a different answer or you want more details, please comment and let me know :) have a good day/night, wherever you are!!!

This question is asking for five different questions about density, mass and volume which can be all summarized with the following definition of density as the degree of compactness of the objects taken into consideration:

\(\rho =\frac{m}{V}\)

In such a way, we can proceed as follows:

15. the mass is given as 42 g and the volume can be found by multiplying the given dimensions:

\(V=2cm*6cm*7cm=84 cm^3\)

And the density turns out to be:

\(\rho =\frac{42g}{84cm^3}=0.5 g/cm^3\)

16. both mass and density are given as 17 g and 120 g/mL respectively, so that we have to solve for the volume as shown below:

\(V=\frac{m}{\rho} =\frac{17g}{120g/mL} =0.14 mL\)

17. the mass is given as 23 g and the volume as 123 mL, so that the density is calculated as shown below:

\(\rho=\frac{23g}{123 mL} =0.19 g/mL\)

Which can be converted to kg/mL as follows:

\(0.19\frac{g}{mL} *\frac{1kg}{1000g}=0.00019 kg/mL\)

18. the mass is given as 45 g and the density as 240 g/cm³, so we can solve for the volume as follows:

\(V=\frac{m}{\rho} =\frac{45g}{240g/cm^3}=0.19 cm^3\)

19. In this case, since the water has lower density than the object, we can infer that the latter is heavier than the former, this means that the object will sink according to the Archimedes principle.

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RS is a composition of rotation and reflection in the Euclidean plane E². The precise description of RS depends on the specific properties of the rotation R and reflection S.

In general, if R and S have the same axis or line of symmetry, the composition RS results in a translation. If R and S have intersecting lines of symmetry, RS yields a glide reflection. If R and S have perpendicular lines of symmetry, RS produces a rotation.

It is important to consider special cases, such as parallel lines of symmetry, coinciding axes, or perpendicular lines of reflection, as they may lead to different outcomes. The classification of isometries in E² involves understanding how rotations and reflections combine to create different transformations in the plane.

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A rope and pulley system is used so that a 20N force can lift a 60N weight. The minimum number of ropes in the system that must support the weight is 3.

A force in physics is an effect that has the power to alter an object's motion. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

Given that in the question a rope and pulley system is used so that a 20N force can lift a 60N weight.  The minimum number of ropes in the system that must support the weight is 60/20 = 3 ropes.

The minimum number of ropes in the system that must support the weight is 3.

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Answer:

if the demand for related goods is affected

Understanding and anticipating derived demand is essential for automobile manufacturers to effectively plan production, manage inventory, and ensure a seamless flow of materials and components.

Derived demand refers to the demand for a product or service that is based on the demand for another related product or service. In the context of automobile manufacturing, derived demand plays a significant role.

The manufacturing of an automobile is heavily influenced by derived demand from various sectors. For instance, the demand for automobiles is derived from consumer demand for transportation. When consumers have a higher demand for cars, it creates a derived demand for automobile manufacturing.

Derived demand also extends to the demand for raw materials and components used in automobile manufacturing. As the demand for automobiles increases, the demand for steel, plastic, rubber, electronics, and other materials necessary for manufacturing also rises. Manufacturers of these materials then experience an increase in their own production to meet the derived demand from the automobile industry.

Additionally, the derived demand for automobiles affects the entire supply chain. Suppliers of parts and components to automobile manufacturers also experience increased demand, leading to higher production and delivery of those parts.

Derived demand plays a crucial role in the manufacturing of automobiles. The demand for automobiles is derived from consumer demand for transportation, which drives the manufacturing process. This derived demand extends to raw materials and components, as well as the entire supply chain. Understanding and anticipating derived demand is essential for automobile manufacturers to effectively plan production, manage inventory, and ensure a seamless flow of materials and components.

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Table at rest, Books on a table, See-saw are objects in equilibrium found in the class room.

There is no net force acting on an object and it is said to be in equilibrium if the size and direction of the forces acting on it are precisely balanced. If an object is moving with a constant velocity, it is in equilibrium because its acceleration is zero. The fundamental function of an object in equilibrium is a zero acceleration.

Two forces are in equilibrium when they are acting on an object that is stationary or moving at a constant speed. The body will accelerate if the forces have a result rather than canceling each other out.

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Gravity and wind speed are vector quantity , Temperature , Volume , Number of pages in a book are the scalar quantity

In terms of their size and direction, the physical quantities may be divided into scalars and vectors.The examples of physical quantities that can be sort into vectors and scalars are temperature, gravity, volume, number of pages in a book, wind speed and direction, etc.

The following quantities are:

Temperature- The temperature is a scalar number since it just needs the magnitude (heat content) and not the direction.

Gravity - It is comparable to the force with which the Earth pulls an item that is always pointed toward its center. The amount is a vector since both magnitude and direction define it.

Volume - it is the pitch of a sound wave which is nothing but a form of energy which causes the sensation of hearing. Since the direction is not required to measure a sound level (determined by the corresponding frequency of the sound wave) but the only magnitude, therefore, it is a scalar.

The amount is a scalar since the number of pages in a book is entirely determined by a numerical value without the requirement for a direction.

Wind Speed and Direction - Since both the wind's magnitude in terms of speed and direction are necessary, the quantity is a vector.

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Answer:

The answer is true I guess!!!

This is because the more you go up to less air it is and the pressure also gets less!!!!!!!!

Explanation:

I HOPE THAT I WAS HELPFUL TO YOU!

Explanation:

It is given that,

Initial position of the person is 2 m and final position is 25 m

The trip takes 4.5 seconds

Person's average velocity is equal to the displacement divided by time.

Displacement = final position-initial position

D = 25 m - 2 m

D = 23 m

Average velocity = \(\dfrac{23}{4.5}=5.12\ m/s\)

Distance covered = 25 m + 2 m = 27 m

Average speed = \(\dfrac{27}{4.5}=6\ m/s\)

Hence, this is the required solution.

No, the sun cannot explain global warming. Global warming is a phenomenon in which the temperature of the Earth's surface and atmosphere is rising continuously due to human activities such as deforestation, burning of fossil fuels, and industrialization.

This increase in temperature cannot be explained only by an increase in solar radiation.There are several factors which contribute to global warming, including greenhouse gases such as carbon dioxide, methane, and water vapor. These gases trap heat in the Earth's atmosphere, which causes the planet's temperature to rise. The sun's radiation does contribute to global warming, but it is not the main cause.

i) To calculate the increase in solar radiation that would cause the Earth to warm up by 1 K, we can use the following formula:ΔS = ΔT / αWhere ΔS is the increase in solar constant, ΔT is the increase in temperature, and α is the Earth's albedo (reflectivity).α = 0.30 is the standard value used for the Earth's albedo.ΔS = ΔT / αΔS = 1 K / 0.30ΔS = 3.33 W/m2So, to explain the increase in temperature of 1 K over the last hundred years, the solar constant would need to increase by 3.33 W/m2.

ii) The observed fluctuation of the solar constant over the past 400 years has been around 0.1% to 0.2%. This is much smaller than the 3.33 W/m2 required to explain the increase in temperature of 1 K over the last hundred years. Therefore, it is unlikely that the sun is the main cause of global warming.

The sun cannot explain global warming. While the sun's radiation does contribute to global warming, it is not the main cause. The main cause of global warming is human activities, particularly the burning of fossil fuels, which release large amounts of greenhouse gases into the atmosphere.

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Answer:

Force of kinetic friction, Fk = 6N

Explanation:

Given the following data;

Coefficient of kinetic friction, μ = 0.2

Normal force, Fn=30N

To find the Force of kinetic friction;

Mathematically, the force of kinetic friction is given by the formula;

Fk = μFn

Where;

Substituting into the equation, we have;

Fk = 0.2*30

Fk = 6N

Therefore, the force of kinetic friction is 6N.

A force that is present between two moving objects or surfaces is called kinetic friction. It is estimated in newtons (N) and is calculated by:

\(\rm F_{k} =\rm \mu _{\rm k} F_{n}\)

Where, \(\rm F_{k}\) = frictional force,  \(\mu _{\rm k}\)  = coefficient, \(\rm F_{n}\) = normal force.

The kinetic friction of the object is 6N.

The kinetic friction can be estimated as:

Given,

Substituting values in the formula:

\(\rm F_{k} =\rm \mu _{\rm k} F_{n}\)

\(\begin{aligned}\rm F_{k} &= 0.2 \times 30\\\\\rm F_{k} &= 6 \rm N\end{aligned}\)

Therefore, 6N is the frictional force.

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Volcanic eruptions can have significant impacts on the availability of resources by disrupting the sunlight from reaching producers, By decreasing the thickness of soil, By causing more heavy rains to erode topsoil, By causing the surface of the Earth to be warmer than usual.

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Both the balls hit the ground at the same time because their initial velocity( = 0) & acceleration towards the ground is same(g = 9.8m/s²)

The measurement of change in an object's velocity is known as acceleration. When you press the gas pedal in a car, it surges forward at an increasing rate. Acceleration is the change in velocity.

The formula for calculating acceleration is as follows:

Acceleration = (Velocity Change)/ (change in time)

The standard unit of acceleration measurement is metres per second squared (m/s2). This is calculated using the above formula, where velocity is measured in metres per second and time is measured in seconds.

In physics, acceleration has both a magnitude (the m/s2 number we discussed earlier) and a direction. As a result, acceleration is now a vector.

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Complete question:

A physics demo launches a ball horizontally while dropping a second ball vertically at exactly the same time. [Delayed Feedback] 1) Which ball hits the ground first?

Answer:

Millions of other species, including humans, depend on fresh water to drink. When an area loses a large percentage of its fresh water, many animals die off

Explanation:

No explanation needed because i'm just that good..

Answer:

Water full lands support life more with more diverse species of plants and animals in positive way. As compared to it barren and deserted lands with no or less water are less diverse with few hard living species .

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Answer:

low angle     n₁ sin θ₁ = n₂ sin θ₂

critical angle    sin θ₁ = \(\frac{n2}{n1}\)    θ₁ = θ_{reflected}

Explanation:

When the light ray touches the two surfaces of the refraction according to the Law of Refraction

           n₁ sin θ₁ = n₂ sin θ₂

In this problem the ray goes from the material with the highest index to the lowest index, in the middle of the incident it has the subscript 1

           sin θ₂ = \(\frac{n_1}{n_2}\) sin θ₂

What

           n₁/n₂> 1

in refracted ray it moves away from normal.

As the incident angle increases, a value is reached where sin θ₂ = 1, for this angle

            sin θ₁ = \(\frac{n2}{n1}\)

This angle is called critical and as the sine function cannot have values greater than 1, the ray is reflected, therefore it must comply with the law of reflection where the incident angle is equal to the reflected angle.

In Young's single slit experiment, if the width of the slit decreases, the width of the diffracted peaks increases.

Young's experiment involves a single slit that diffracts light and produces a pattern of bright and dark fringes on a screen. The width of the slit affects the diffraction of light through the slit and determines the width of the bright fringes on the screen.

The narrower the slit, the greater the diffraction of light, which causes the bright fringes to become wider.

This is because diffraction causes the light waves to spread out as they pass through the narrow slit, leading to interference and the formation of bright and dark fringes on the screen.

Therefore, if the width of the slit decreases, the width of the diffracted peaks increases.

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(a) To determine the magnitude of the initial velocity of the ball, we need to find the value of the velocity when time is equal to 0. From the graph, we can see that at t = 0, the velocity is approximately 6 m/s. Therefore, the magnitude of the initial velocity of the ball is 6 m/s.

(b) To calculate the distance traveled by the ball during 20 seconds, we need to find the area under the velocity-time graph for the given time interval. From the graph, we can see that the graph is a triangle. The formula to calculate the area of a triangle is:

Area = (base * height) / 2

In this case, the base of the triangle is 20 seconds, and the height is 6 m/s. Plugging in these values into the formula, we get:

Area = (20 * 6) / 2 = 60 meters

Therefore, the distance traveled by the ball during 20 seconds is 60 meters.

(c) To calculate the acceleration of the ball from the graph, we need to find the slope of the velocity-time graph. Since the graph is a straight line, the slope represents the acceleration.

From the graph, we can see that the slope of the line is constant and equal to -2 m/s^2. Therefore, the acceleration of the ball is -2 m/s^2.

Answer:

\( \boxed{\sf54 \: kobo}\)

Explanation:

Energy = Power × Time

Energy = 900× 4 ×5 = 18000 wh

Energy = 18000 wh = 18 kwh

Cost of 1 unit electricity = 3 kobo

cost of 18 unit electricity= 18 × 3 = 54 kobo

Answer:

54 Kobo

Explanation:

Units of electricity are measured in kilowatt hours (kWh).

Given information:

Convert the wattage of the electric iron from watts to kilowatts.

1000 watts (W) = 1 kilowatt (kW)

⇒ 900 watts = 1 ÷ 1000 = 0.9 kilowatts

This means that the power consumption of the electric iron is 0.9 kW per hour of use.

Total hours spent pressing clothes:

= 4 hours per week for 5 weeks

= 4 × 5

= 20 hours

Total power consumption:

= number of kW × number of hours

= 0.9 × 20

= 18 kWh

To find the total cost, multiply the total kWh by the cost per kWh:

⇒ Cost = 18 × 3 = 54 Kobo

Answer:

Foil insulation can prevent radiant heat loss all year round. In summer, it can prevent heat from entering by reflecting sunlight. In winter, it can reflect heat back inside a room, keeping it warmer.

Explanation:

as the centripetal force acts upon an object moving in a circle constant speed, the force always acts inward as the velocity of the object is directed tangent to the circle. this would mean that the force is always directed prepidecilsr to the direction that the object is being displaced.