A drawing pin has a sharp point at one end and a large flat head at the other use the words force pressure or area

Answer:

We can use Coulomb's law to solve this problem:

F = k * q1 * q2 / r^2

where F is the force between the two charges, k is Coulomb's constant (k = 9 x 10^9 N m^2 / C^2), q1 and q2 are the magnitudes of the charges, and r is the distance between them.

We know the force F, the distance r, and the magnitude of one of the charges q1. We can rearrange the equation to solve for the magnitude of the other charge q2:

q2 = F * r^2 / (k * q1)

Substituting the values we have:

q2 = (250 N) * (0.15 m)^2 / (9 x 10^9 N m^2 / C^2 * 6.5 x 10^-5 C)

Simplifying:

q2 = 8.65 x 10^5 C

Therefore, the magnitude of the other charge is 8.65 x 10^5 C.

Answer:

a. push

Explanation:

Voltage is the force or pressure that is responsible for pushing the charge or electrons to flow in a closed-looped electrical circuit. This flow of electrons (charge) is called the electric current. It is also defined as the difference in electric potential per unit charge between two points in an electric field.

It is accurate to say that the stars in the Milky Way behave like planets orbiting a star rather than comets orbiting a star.

A comet is a celestial object consisting of a nucleus of ice and dust that is surrounded by a fuzzy coma (atmosphere) and a tail.

The stars orbiting the center of the Milky Way would behave more like a planet orbiting a star than a comet. This is because the stars are much larger than comets and have a more significant gravitational pull. The stars in the Milky Way galaxy orbit around a massive central black hole, which has a mass of millions of times that of the Sun. This black hole's gravitational pull is strong enough to keep the stars in orbit around it.

In contrast, comets are much smaller and have a much weaker gravitational pull than stars. They typically orbit around the Sun in highly elliptical orbits, which can cause them to be ejected from the solar system or collide with planets. The stars in the Milky Way, on the other hand, have more circular orbits around the central black hole, which keeps them in stable orbits for billions of years.

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Answer:

convection

Explanation:

Convection is a mode of heat transfer in which the molecules near the heat source get heated up, expand, become less dense, and rise upwards. The cooler molecules, on the other hand, sink to the bottom and are eventually heated up. Thus the transmission of heat by the movement of heated particles is called convection.

If the mixture is thermally isolated from its surroundings, then it, loses thermal energy to the environment outside as it comes to a final temperature. The correct answer is d.

When the sample of lead is placed in the water, heat will flow from the lead to the water until they reach a common final temperature. Since the final temperature will be less than the initial temperature of the lead, heat must have flowed out of the lead into the surroundings, causing the lead to lose thermal energy to the environment outside the system.

Since the mixture is thermally isolated from its surroundings, no thermal energy is exchanged between the system (lead and water) and the environment during the process. However, heat can still flow within the system itself until thermal equilibrium is reached. Option d is correct.

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Answer:

The ball travels faster when Mike throws it.

Explanation:

Mike throws the ball harder, with a greater force, so the ball travels faster when Mike throws it than when Joe does.

The elastic potential energy will be =

For a)  7.5J

For d)  1687.5J

For g)  0.675J

For b) 11.718J

For e) 1267.5J

For h) 1080J

For c)  73507.5J

For f)  10.8J

For i)  18750J

According to the formula for calculating elastic potential energy,

Elastic potential energy (u) = 1/2 x spring constant x \((amount of extension)^{2}\)

Let was calculate the value of 1/2 x spring constant to simplify the equation = 1/2 x 15 = 7.5

for a) 7.5 x \(1^{2}\) = 7.5J

for d) 7.5 x \(15^{2}\) = 1687.5J

for g) 7.5 x \(0.3^{2}\) = 0.675J

for b) 7.5 x \(1.25^{2}\) = 11.718J

for e) 7.5 x \(13^{2}\) = 1267.5J

for h) 7.5 x \(12^{2}\) = 1080J

for c) 7.5 x \(99^{2}\) = 73507.5J

for f) 7.5 x \(1.2^{2}\) = 10.8J

for i) 7.5 x \(50^{2}\) = 18750J

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In the given scenario, Maude most likely started her own firm because it offered independence.

What is the main motivation behind people choosing to start their own businesses?

What you may think is not what drives entrepreneurs to launch their own enterprises. The freedom, satisfaction, and flexibility that being their own boss affords is the main motivation for the majority of people.

Many business owners decide to launch their ventures alone because they desire complete control and because coordination is easier.

Every method for beginning a business has advantages and disadvantages. The appropriate type of ownership will be determined by a number of variables, including the business's industry, capital needs, owners' liability for profits, regulatory requirements, business continuity, and transferability of interests, among others.

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Answer:

Explanation:

Distance = speed *time

as per the question, THE average speed is 40Km/h

time1 = S/40,time2 = S/40

now , time1 +time2

s/40+s/40

The time taken for Arun's journey can be calculated by dividing the distance to his school by the average speed. Assuming the school is 20km away, at an average speed of 40km/h, it would take Arun 30 minutes to reach school.

The question involves applying the concept of speed as being the distance traveled divided by the time it takes to get to the destination. To determine how long Arun's journey takes taking into account the average speed of 40km/h, we need to know the distance to school. However, if we assume the distance as 'd' kilometers, the time taken can be found by the formula: time = distance/speed

Let's say, for example, Arun’s school is 20 kilometers away. Using the formula time = distance/speed, we substitute the distance and speed into the formula: time = 20km / 40km/h = 0.5 hours. To convert this time into minutes, we multiply by 60 (since there are 60 minutes in an hour), which gives us 30 minutes. Therefore, if Arun’s school was 20 kilometers away, his journey would take him 30 minutes.

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Answer:

It has producer-consumer relationship with sugar-maple trees because it gets food from the trees.

Explanation:

The mourning bird is primarily a seed eater and not an insect eater. Since it is a seed eater, it will directly from the sugar-maple tree which is the producer.

In an ecosystem, the producers are plants which can trap energy directly from the sun during photosynthesis. This energy is passed on to the consumers.

Hence, the mourning bird has producer-consumer relationship with sugar-maple trees because it gets food from the trees.

Answer:

In short, there are four types of natural silk produced around the world: Mulberry silk, Eri silk, Tasar silk and Muga silk. Mulberry silk contributes around as much as 90% of silk production, with the mulberry silkworm generally being regarded as the most important.

Taking into account the Universal Law of Gravitation, Venus and Earth are separated by a distance of 1,316,302,384 m.

The Universal Law of Gravitation establishes that bodies, by the simple fact of having mass, experience a force of attraction towards other bodies with mass, called gravitational force.

The Universal Law of Gravitation states that the gravitational force between two bodies is directly proportional to the product of their masses and inversely proportional to the square of the distance that separates them. Mathematically it is expressed as follows:

\(F=G\frac{Mm}{d^{2} }\)

where:

In this case, you know:

Replacing in the Universal Law of Gravitation:

\(1.12x10^{18} N=6.67x10^{-11} \frac{Nm^{2} }{kg^{2} }\frac{4.87x10^{24} kgx5.97x10^{24} kg}{d^{2} }\)

Solving:

\(1.12x10^{18} N=6.67x10^{-11} \frac{Nm^{2} }{kg^{2} }\frac{2.90739x10^{49} kg^{2} }{d^{2} }\)

1.12×10¹⁸ N÷ 6.67×10⁻¹¹ \(\frac{Nm^{2} }{kg^{2} }\)= \(\frac{2.90739x10^{49} kg^{2} }{d^{2} }\)

1.678×10 ²⁸\(\frac{kg^{2} }{m^{2} }\)= \(\frac{2.90739x10^{49} kg^{2} }{d^{2} }\)

1.678×10 ²⁸\(\frac{kg^{2} }{m^{2} }\)× d²= 2.90739× 10⁴⁹ kg²

d²= 2.90739× 10⁴⁹ kg²÷ 1.678×10 ²⁸\(\frac{kg^{2} }{m^{2} }\)

d²= 1.73265 m²

d= √1.73265 m²

d=1,316,302,384 m

Finally, Venus and Earth are separated by a distance of 1,316,302,384 m.

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Answer:

scalar Besause it has magnitude but no direction

The rotational inertia of the meter stick about the midpoint is 0.0625 kg·m²

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Answer:

A) 30 N right

Explanation:

your welcome

Answer:

The dimensions of a is L⁵·M·T⁻²mol⁻²

Explanation:

The gas equation for a real gas, can be presented as follows;

\(\left (P + \dfrac{n^2 \cdot a}{V^2} \right) \cdot \left (V - n \cdot b\right) = R \cdot T\)

Where;

P = The pressure

V = The volume

a = A constant representing intermolecular forces

b = A constant representing molecular volume

n = The number of moles

The dimensions of the expression \(P + \dfrac{n^2 \cdot a}{V^2}\) is in units of pressure, given that 'P' is in units of pressure, bar, therefore, the expression, \(\dfrac{n^2 \cdot a}{V^2}\), is also measured in units of pressure

The dimensions of pressure, P = M·L⁻¹·T⁻²

'n²' unit dimension is mol², while V² is measured as liter² (L³), therefore, 'a' will convert the units of n² and V² to bars, therefore, we have;

The unit dimension of a = L²·bar/(mol²)

(L³)²·(M/(L·T²))/(mol²) = L⁵·M·T⁻²mol⁻²

The dimension of a = L⁵·M·T⁻²mol⁻²

Where;

L = Length in meters

T = Time in seconds

M = Mass in kilogram

The apparent weight of a 92-kg astronaut aboard this rocket 3707 N.

A rocket launches with an acceleration of 30.5 m/s2.

velocity = 30.5 m/s2

astronaut weighs 92 kg.

To locate

The astronaut's apparent weight is equal to

Solution:

According to, the astronaut's overall weight in a rocket is

W = w + F

W stands for the astronaut's perceived weight

astronaut weight on Earth's surface: grams

F = astronaut's force multiplied by ma

W = mg+ma

W = m (g+a)

W = 92 (9.8 + 30.5)

W = 3707 N

As a result, the astronaut in the rocket appears to weigh 3707 N.

The apparent weight of a 92-kg astronaut aboard this rocket 3707 N.

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The drop in body temperature would be 56.6°C. (The temperature drop is negative because heat is being lost).

A physical feature of matter known as heat capacity or thermal capacity is the quantity of heat that must be applied to an item in order to cause a unit change in temperature. J/K is the metric unit for heat capacity. A broad attribute is heat capacity.

The amount of heat energy needed to increase the temperature of a given quantity of matter by one degree Celsius is referred to as heat capacity. Heat capacity is a broad attribute that depends on the size or amount of a specific substance.

The heat capacity of water can be expressed as:

C = 4.184 J/g°C

Since the heat capacity of the hiker and clothes can be approximated as equal to that of water, we can use the same heat capacity.

The change in temperature can be found using the equation:

ΔT = Q / (m * C)

where Q is the heat lost by the hiker2,

m is the mass of the hiker and clothes, and

C is the heat capacity.

Substituting the given values, we get:

ΔT = (-6.57 x 10^6 J) / (95 kg * 4.184 J/g°C)

= -56.6°C

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The rotational velocity of the grindstone was 60 rad/s after 12 s, the rotational inertia of the grindstone is 3.75 kg m². Rotational inertia depends upon mass and radius.

The rotational inertia, I, of the grindstone is  3.75 kg m². And can be determined using the following equation:I = 1/2 × m × r².

here m is the mass of the grindstone (25 kg) and r is the radius of the grindstone (0.30 m).

Thus, the rotational inertia of the grindstone is: I = 1/2 × 25 kg × (0.30 m)² = 3.75 kg m².

The steady 20 N tension force on the grindstone provides a torque that can be determined using the equation: Torque = r × F where r is the radius of the grindstone (0.30 m) and F is the tension force (20 N).

Therefore, the torque on the grindstone is
Torque = 0.30 m × 20 N = 6

Using the equation for rotational acceleration, the rotational acceleration, α, of the grindstone can be determined:
α = Torque / I where Torque is the torque on the grindstone (6 Nm) and I is the rotational inertia (3.75 kg m²).

Thus, the rotational acceleration of the grindstone is: α = 6 Nm / 3.75 kg m2 = 1.6 rad/s²
Using the equation for rotational velocity, the rotational velocity, ω, of the grindstone can be determined:
ω = α × t

Since, the rotational velocity of the grindstone was 60 rad/s after 12 s, the rotational inertia of the grindstone is 3.75 kg m².

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1gw

that's the answer tnx

The vertical height of the marble when it comes to a stop before rolling back is 20 centimeters.

As per the Law of conservation of energy,

If there is no external force acting on the system, the energy will always remains the same at every point of the motion.

As, we can see, there is no external force on the marble,

Energy of the marble at start will be equal to energy of the marble at the vertical height

We can write,

Energy while rolling = Energy at the highest point

1/2MV² = MgH

Where,

M is the mass of the marble,

V is the velocity of the marble,

g is the acceleration due to gravity and,

H is vertical height of the marble.

So,

1/2MV² = MgH

1/2V² = gh

Putting all the values,

1/2(2)² = 10H

H = 4/20

H = 0.2 meters.

So, the vertical height of the marble is 20 cm.

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Answer:

this is the answer

Answer:

60N

Explanation:

Given parameters:

Combined mass = 50kg

Acceleration  = 1.2m/s²

Unknown:

Force to propel  = ?

Solution:

From Newton's second law of motion, we know that;

       Force  = mass x acceleration

 So;

         Force  = 50 x 1.2  = 60N

Answer:

60N

Explanation:

Answer:

When a branch of a tree is shaken, some of the fruits may fall down. Why? Solution : The fruits fall down due to inertia of rest.

Answer:

I HOPE IT WILL HELP YOU A LOT....

The force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface.

Queremos crear un diagrama general para calcular el área de un triangulo.

Este será algo como:

Como naturalmente habra algunas variaciones segun el programa que utilicemos, lo voy a escribir de forma bastante general.

Primero definamos nuestras variables:

Por ejemple, en fortran usariamos algo como:

real:: B, H, A

Donde B será la variable que usaremos para la base, H para la altura, y A para el área.

Luego tenemos que escribir en pantalla algo que le diga al usario que debe introducir la base y el area.

Luego el programa debe ser capaz de leer ese input.

con algo de la forma:

B = read*input 1

H = read*input 2

Una vez tenemos definidas las variables, simplemente calculamos el área del triangulo:

A = H*B/2

Finalmente la podemos mostrar en pantalla con algo como:

print(A).

Lo que nos mostraría el valor del área.

Concluyendo, el diagrama en general sería:

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Newton’s first law of motion is illustrated when a magician pulls a tablecloth out from under the dishes without disturbing them. Newton’s laws of motion explain the behavior of objects when forces act upon them. They describe the relationship between the motion of an object and the forces acting upon it.

Newton’s first law of motion states that an object at rest will stay at rest and an object in motion will stay in motion with a constant speed and in a straight line unless acted upon by an unbalanced force. In this case, the unbalanced force is the magician pulling the tablecloth while the dishes remain at rest.

Because of Newton’s first law of motion, the dishes will stay in place due to their inertia. Inertia is the tendency of an object to resist a change in its motion. Therefore, the dishes stay at rest, and the tablecloth is removed from under them. The force applied to the tablecloth by the magician is less than the force needed to move the dishes from their position.

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The resistance of the coil  R IS 12.435Ω  and The length of the wire that is calculated from R= ρL/A is L = 1.97 m.

Electrical resistance is a force that opposes the flow of current and is hence resistance to electricity. In this sense, it acts as a gauge for the difficulty of current flow. Ohms () are used to measure resistance.

Electricity will flow from high to low when there is an electron difference between two terminals. In opposition to that flow is resistance. The current decreases with increasing resistance. Conversely, the higher the current, the lower the resistance. In theory, resistance is affected by the kind, temperature, and length of the material through which the electricity is flowing. Metals generally have low electrical resistance, which varies depending on the type of metal, which makes electricity flow through them more easily.

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