Two 15 N forces in same directions are acting on an object. What is the magnitude of the net force?

Answer:

\(v_f=9,07~m/s\)

Explanation:

Constant Acceleration Motion

It's a type of motion in which the velocity of an object changes uniformly in time.

Being a the constant acceleration, vo the initial speed, vf the final speed, and t the time, the following relation applies:

\(v_f=v_o+at\)

The car initially travels at vo=7.35 m/s and accelerates at a rate of \(a=0.824~m/s^2\) during t=2.09 s.

The final velocity is:

\(v_f=7.35+0.824*2.09\)

\(\mathbf{v_f=9,07~m/s}\)

0 to 60 mph in 4.5 seconds

Explanation:

The orbit is 10500km far from earth station and it is MEO ( medium earth orbit ) as the range of MEO is 5000-12000km

What is medium earth orbit ?

A medium Earth orbit (MEO) is an Earth-centered orbit with an altitude between 2,000 and 35,786 km (1,243 and 22,236 mi) above sea level, which is between a low Earth orbit (LEO) and a high earth orbit (HEO).

The distinction between MEO and LEO is made at an arbitrary altitude determined by recognized practice, but the boundary between MEO and HEO is made at the specific altitude of a geosynchronous orbit, in which a satellite completes one complete revolution of the Earth in 24 hours. The shortest period (for a circular orbit at the lowest MEO altitude) is approximately 2 hours for all satellites in MEO, and the maximum time is less than 24 hours.

delay time (t) = 35ms

total distance from satellite to earth =

s= c*t = 3*10^8*335*10^-3

s= 10200000m

s = 10500km

satellite altitude = 8000km

round trip time of signal = t(rr) = 2*s/c

                                                  = 2*8000*1000/3*10^8 = 53.33m/s

The orbit is 10500km far from earth station and it is MEO ( medium earth orbit ) as the range of MEO is 5000-12000km

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At 6:15, the minute hand's angular position is π/2 radians, and at 10:35, it is 7π/6 radians. The minute hand of a clock makes a full revolution in 60 minutes, which is equivalent to 2π radians.

To find the angular position of the minute hand at a specific time, we need to calculate the fraction of the 60-minute cycle that has elapsed and multiply it by 2π. For 6:15, the minute hand has moved 15 minutes out of 60, which is equivalent to three-fourths of the cycle. Therefore, its angular position is: (3/4) * 2π = (3/4) * 6.28 ≈ 4.71 radians
For 10:35, the minute hand has moved 35 minutes out of 60, which is equivalent to seven-twelfths of the cycle. Therefore, its angular position is:
(7/12) * 2π = (7/12) * 6.28 ≈ 3.65 radians
So the answer is 3.65 radians.
In summary, the angular position in radians of the minute hand of a clock at 6:15 is 4.71 radians, and at 10:35 is 3.65 radians.

At 6:15, the minute hand is at the 3 o'clock position, which corresponds to 90 degrees. To convert this to radians, use the formula: radians = (degrees * π) / 180. In this case, the angular position of the minute hand is (90 * π) / 180, which simplifies to π/2 radians. For the second scenario, at 10:35, the minute hand is at the 7 o'clock position, corresponding to 210 degrees. Using the same formula to convert degrees to radians, we have (210 * π) / 180, which simplifies to 7π/6 radians.

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The Mass of the car = 782.1 Kg

The mass of the car is calculated as follows:

The force on the car = 6570 N

The acceleration of the car, a = 38 - 0/4.5

acceleration = 8.44 m/s²

Mass of the car = 6570/8.44

Mass of the car = 782.1 Kg

In conclusion, the mass of the car is obtained from the acceleration and force on the car.

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Answer:

About 29.5

Explanation:

Answer:

7 days or a week

Explanation:

Answer:

im saying 4. its just a guess it makes sense tho

Explanation:

sorry for getting this wrong.

Answer:

longitudinal waves

Explanation:

I got it right

Cultural hazards, which are not represented in the given descriptions, typically relate to societal factors like unsafe working conditions or dangerous cultural practices.

Physical Hazard: Suffering injury during an earthquake, exposure to excessive UV light when going to a tanning salon, exposure to UV light during everyday activities.

Chemical Hazard: Inhalation of carcinogens when choosing to smoke cigarettes, exposure to bisphenol A in drinking water, ingesting synthetic pesticides on food.

Biological Hazard: Suffering nutritional deficiencies from an intestinal parasite, contracting influenza and becoming ill.

Cultural Hazard: N/A

Physical hazards refer to dangers that arise from physical processes or events, such as earthquakes or excessive UV light. Chemical hazards involve exposure to harmful chemicals, like carcinogens found in cigarette smoke or bisphenol A in drinking water.

Biological hazards involve the risk of illnesses caused by living organisms, such as contracting influenza or suffering from nutritional deficiencies due to intestinal parasites. Cultural hazards, which are not represented in the given descriptions, typically relate to societal factors like unsafe working conditions or dangerous cultural practices.

By categorizing these hazards accordingly, we can better understand the types of risks individuals face and implement appropriate preventive measures to safeguard their health and well-being.

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Answer:

Mass, M = 4.859 Kg

Explanation:

Given the following data;

Radius, r = 0.225 m

Moment of inertia, I = 0.123 kgm²

To find the mass;

Mathematically, the moment of inertia is given by the formula;

I = ⅖Mr²

Making M the subject of formula, we have;

Cross-multiplying, we have;

2I = Mr²

\( M = \frac {2I}{r^{2}} \)

Substituting into the formula, we have;

\( M = \frac {2*0.123}{0.225^{2}} \)

\( M = \frac {0.246}{0.050625} \)

Mass, M = 4.859 Kg

In the Twilight series, vampires' eyes change color because they are not like normal human eyes. The eyes of vampires are described as golden when they are well-fed on human blood, but turn black or dark red when they are thirsty and have not fed on human blood in a while.

This is due to the fact that vampires' eyes are capable of reflecting more light than human eyes, which makes them appear brighter and more intense. Additionally, the color change in their eyes is a way for the author to symbolize the transformation of the vampires from human to vampire, and to highlight their supernatural nature.

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Answer:

The cue ball crashing into the eight balls on a pool table.

Explanation:

Elastic and inelastic collisions are two types of collisions.

For elastic collision, both the momentum and the kinetic energy before and after the collision remains conserved.

Out of the given options, the option that shows an example of an elastic collision is option A " The cue ball crashing into the eight balls on a pool table." All the eight balls after crashing moves with different velocity.

Answer: 4 night’s

Explanation:

Acceleration due to gravity on the surface of the earth

g=GM/r2

Escape velocity v = √GM/r

torque in terms of I and a τ = l*a

The definition of torque is the product of the force's strength and the angle at which the force's line of action is perpendicular to the axis of rotation. Torque can also be understood in terms of the law of conservation of energy. The lowercase Greek letter tau is frequently used as the sign for torque.The speed at which an object moves to escape the gravitational pull of a planet or moon without developing propulsion is known as escape velocity.The acceleration due to gravity value of 9.8 m/s2 means that the velocity of a body falling freely changes by 9.8 m/s every second.

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Answer:

V is greater

Explanation:

because v intial at that time V final is the that speed which it is going at that time

After considering all the given options we come to the conclusion that the required answer to the given question is Option D.

Convection is generally known as the property that aids the transfer of thermal energy through the movement of particles from one specified area to another. It typically seen to take place  in fluids .
When we talk about convection, particles that have a lot of heat energy inside a liquid or gas dominate over the particles that have less heat energy by taking their dedicated space. Then , convection can occur in air and water.
some famous examples of convection are:
Boiling water
Land and sea breeze
Air conditioner
Radiator
Refrigerator
Hot air popper
Hot air balloon
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i dont know thats why i downloaded brainly... so I COULD LEARN

Answer:

it is heavy

Explanation:

Answer:

1st: Radiation

2nd: Conduction

3rd: Convection

Explanation:

I actually learned this before in school. Yay

Answer:

cant see to find the answer sorry :( i tried :( good luck !! youll do great <333

Explanation:

sorry ;( best of luck

a) When a block is resting on a flat surface, As long as it is at rest, it will exert a downward force on the surface which is a product of its mass and gravity. It will not move according to newtons first law of motion unless a force is applied. According to newton's third law of motion, there would be an opposite reaction that would balance this downward force. This is known as the normal force. The model of this scenario is shown below.

b) For the block with a 2 N force acting on it, the diagram is shown below.

For the first model, the object will remain at rest

For the second model, the applied force will cause the block to move towards the right since there is no frictional force to oppose the motion. The net force in the horizontal direction is 2N

check the pictures(2 pictures)check the pictures(2 pictures)check the pictures(2 pictures)

The vector sum of the two forces is 20  and the magnitude of the resultant is 20 towards positive x-axis.

A vector is a quantity or phenomena with magnitude and direction that are independent of one another. The phrase also refers to a quantity's mathematical or geometrical representation.

If no vector can be written as a linear combination of the others, a set of vectors is said to be linearly independent.

The vector representation for the forces F and F are:

\(\rm \vec F_1 = 20 COS 60^0 \vec i + 20 SIN 60^0 \vec j\\\\ F_1 =20 \times \frac{1}{2} \vec i+20 \times \frac{\sqrt{3} }{2} \vec j \\\\ \vec F_1 = 10 \vec i+ 10 \sqrt{3} \vec J\)

\(\rm F_2 = 20 cos 60^0 \vec i+20 sin(-60) \vec j \\\\ F_2 = 20 \times \frac{1}{2} \times \vec i+20 \times \frac{\sqrt{3} }{2} \vec j \\\\ \vec F_2 = 10 \vec I -10\sqrt{3} \vec J\)

The vector sum of the two forces are;

\(\rm \vec R = \vec F_1+\vec F_2\\\\ \vec R = 10 \vec i+ 10 \sqrt{3} \vec J+10 \vec i-10\sqrt{3} \vec J\\\\ \vec R =20 i\)

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Answer:

answer is 2 ms-2

Explanation:

v= 10.0 m/s

u=4.0 m/s

t=3.0 seconds

a=?

from equation, v= u+at

10.0 m/s =4.0 m/s + a × 3s

6 m/s. = 3a

6/3 = a

2.0 m/s-2 = a

Answer:

Displacement is the distance between an object’s initial position and its final position and is usually measured or defined along a straight line. Since this is a calculation that measures distance, the standard unit is the meter (m).

Explanation:

Solar energy is a renewable energy resource that can provide suitable power for the world in general. It is one of the most abundant energy resources on Earth. Amongst the reasons why solar energy is a viable alternative energy are:

The sun is the largest source of free energy you can utilize on this planet. It can provide enough power that can supply the world’s electricity needs for a year.

One of the primary benefits of utilizing solar energy is that it can provide a clean, green source of power. It is a self-sufficient renewable energy source.

Therefore, solar energy is a viable alternative energy source because it is a renewable source of energy.

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Answer:

It has an endless supply

Explanation:

Pearson Connexus 2023.

Unlike a nonrenewable source of energy such as fossil fuels, solar power is a renewable source of energy that will not run out.

Answer:

Continents move

Explanation:

The change in gravitational potential energy is the same for both balls, leading to the conclusion that the change in kinetic energy must also be the same.

a) The ball will have maximum kinetic energy.

When all the initial energy of the ball is converted into kinetic energy, the ball will have the maximum possible kinetic energy. This occurs when the ball is released from a height and falls to the ground without any loss of energy due to friction or air resistance.

The ball will be moving at its maximum speed when all its initial energy is converted into kinetic energy.

b.The ball will experience a greater change in kinetic energy.

The amount of kinetic energy of a moving object is proportional to its velocity squared. Therefore, if the ball is in the air longer, it will have more time to accelerate due to the force of gravity and gain more velocity, resulting in a greater change in kinetic energy.

A longer duration in the air will result in a greater change in kinetic energy for the ball.

c. The change in kinetic energy must be the same for both balls.

The change in gravitational potential energy of a ball that is dropped from a certain height is determined by the height of the drop and the gravitational field strength. Since the height and gravitational field strength are the same for both balls, the change in gravitational potential energy will be the same.

According to the law of conservation of energy, the change in gravitational potential energy must be equal to the change in kinetic energy. Therefore, the change in kinetic energy must be the same for both balls.

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From a thermodynamic perspective, the thermodynamically irreversible process description among the following options is: Heat transfer between two objects with the same temperature.

In thermodynamics, an irreversible process is characterized by the inability to return the system and its surroundings to their initial state without external intervention. It is associated with an increase in entropy and the dissipation of energy. In the case of heat transfer between two objects with the same temperature, there is no temperature difference to drive the transfer of heat. Consequently, no useful work can be extracted from this process, and it does not generate any change or increase in entropy. As a result, this process is considered thermodynamically reversible since it can be easily reversed without any net change in the system or surroundings.

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Answer:

14.9 v

Explanation:

V = IR

The voltages across the resistors will be proprtional to the values of the resistors

45 *  235 / (235 + 475) =