I need help writing the expression. There is no option for Req as a whole term.
the answer to Ibatt is 2.2A

2) Write an expression for the current through resistor 2.

answer to I2 is 0.68 A

The bear's total distance traveled is 21 meters and its displacement is 3 meters north.

The bear's total distance traveled is the sum of the distances covered in each leg of the journey, which is:

Total distance traveled = 9 meters + 12 meters = 21 meters

The bear's displacement is the straight-line distance between the starting point and the ending point of the journey, regardless of any intermediate stops.

Since the bear is moving only north, the displacement is simply the difference between the final and initial positions in the north direction, which is:

Displacement = 12 meters - 9 meters = 3 meters north

Therefore, the bear's total distance traveled is 21 meters and its displacement is 3 meters north.

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The resultant final temperature is roughly around 61.7°C.

According to the principle of conservation of energy, a system's overall energy level is constant.

According to the question,

Let Q1 = heat that the heated olive oil has absorbed.

Let Q2= heat that the heated olive oil has released.

Q1 + Q2 = 0   {according to the energy conservation principle}

For absorption of heat by the hot olive oil

Q1 = m1 × c × ΔT1       {Q is the heat absorbed or emitted, m is the sample's mass, and c is olive oil's specific heat capacity = 4.18 J/g °C  ΔT stands for temperature change.}  

Given- M1= 200g, c= 4.18g, T=80°C

Q1 = 200 g × 4.18 J/g °C × ([tex]T_{f}[/tex] - 80°C)

For the heat released by the the warmth that the cold olive oil emits:

Q2 = m2 × c × ΔT2

Q2 = 50 g × 4.18 J/g°C × ( - 20°C)

Q1 + Q2 = 0  {on equating the equation}

200 g × 4.18 J/g °C × ([tex]T_{f}[/tex] - 80°C) + 50 g × 4.18 J/g °C × ([tex]T_{f}[/tex] - 20°C) = 0

[tex]T_{f}[/tex] = (200 g × 4.18 J/g °C × 80°C + 50 g × 4.18 J/g °C × 20°C) / (200 g × 4.18 J/g °C + 50 g × 4.18 J/g °C)

[tex]T_{f}[/tex] = 61.7°C

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Answer:


The power output of the engine can be calculated using the formula:

Power = Force x Velocity

where force is the net force acting on the car, and velocity is the speed of the car. In this case, the net force is equal to the force exerted by the engine, which is 1,775.0 N, since the car is moving at a constant speed and there is no acceleration. The velocity of the car is 13.0 m/s. Thus, the power output of the engine can be calculated as:

Power = 1,775.0 N x 13.0 m/s = 23,075 W

Therefore, the power output of the engine is 23,075 watts.

Explanation:

Weight =mass x force of gravity

Weight = 85kg x 9.8m/s²

Weight = 833N

The force (in N) she must exert if her deceleration is 7.00 times the acceleration of gravity is 245 N

Given data

Force = Mass x Acceleration

Force = 35.0 kg x (7.00 x 9.81 m/s2)

Force = 245 N

The force required for the 35.0 kg gymnast to decelerate after a somersault is 245 N. This force is calculated by multiplying the mass of the gymnast by the deceleration of 7.00 times the acceleration of gravity.

The amount of force is necessary to slow down the gymnast and reduce the impact of the landing. Without this force, the gymnast could be injured from the sudden stop.

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Answer:

The net force required to bring the car to rest is 11,900 N. Since the car is slowing down, the direction of the net force must be opposite to the initial velocity. Therefore, the direction of the net force is opposite to the initial direction of the car's motion.

Explanation:

First, we need to convert the speed from km/h to m/s:

100 km/h * (1000 m/km) / (3600 s/h) = 27.78 m/s

The initial kinetic energy of the car is:

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

KE = (1/2) * 1350 kg * (27.78 m/s)^2

KE = 535,500 J

To bring the car to a stop, the net force applied over the distance traveled must equal the initial kinetic energy. So:

work done = force * distance = KE

Rearranging this equation, we get:

force = KE / distance

Substituting the values we have, we get:

force = 535,500 J / 45 m

force = 11,900 N

The net force required to bring the car to rest is 11,900 N. Since the car is slowing down, the direction of the net force must be opposite to the initial velocity. Therefore, the direction of the net force is opposite to the initial direction of the car's motion.

A key challenge with renewable energy is that the energy must be transported to the place where it's needed batteries or devices .

Option A is correct.

Renewable energy sources such as solar, wind, and hydroelectric power are often located far away from the areas where the energy is needed. This makes it necessary to transport the energy over long distances, which can be expensive and lead to losses due to transmission and distribution. In addition, renewable energy sources are often intermittent, meaning they don't produce a constant supply of energy.

To address this, energy storage devices are needed to store excess energy produced during peak times for use during times of low energy production. However, the current technology for energy storage is not yet efficient or cost-effective enough to meet the growing demand for renewable energy. Developing more effective energy storage devices is therefore an important area of research and development in the field of renewable energy.

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Question incomplete:

A key challenge with renewable energy is that the energy must be transported to the place where it's needed _ or devices that store the energy needed improvement.

A. batteries

B. refineries

C. solar panels

D. wind turbines

Answer:

batteries

Explanation:

The power developed was 1,568 Watts, the calculation is seen in the section below.

In science and engineering, power is the rate at which work is done or energy is delivered. It can be expressed as the product of the work done (W) or the energy transferred (E) divided by the time interval (t).

Given data

We know that expression for Power is given as

Power = (Force x Distance) / Time

Substituting our data into the expression we have

Power = (112 N x 25.0 m) / 7.00 s

Power = 1,568 Watts.

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Answer: In order of most inertia to least.

car stopped

motorcycle driving

dog laying

large hot coffee

small mouse

Explanation:

Honestly, I'm not 100% sure about this, but inertia is the want to remain the way it currently is, So the larger the object, the more inertia it should have. So I basically arranged the things by size, I think the moving and not is a red herring to throw you off. Also given that the dog laying in the middle option makes sense because a dog would be in the middle of the size options.

The potential energy of the shot as it left the hand relative to the ground would be -524 J.

At the moment the shot putter releases the shot, the total energy of the system is:

E = KE + PE

where KE is the kinetic energy of the shot and PE is its potential energy relative to the ground. We can assume that the kinetic energy is entirely due to the motion of the shot in the horizontal direction, so we can write:

KE = (1/2)mv^2

where m is the mass of the shot, and v is its horizontal velocity. Substituting the known values, we get:

KE = (1/2)(5.00 kg)(15.0 m/s)^2 = 1125 J

At the maximum height of 14.5 m, the shot has zero kinetic energy, so all its energy is potential energy:

PE = mgh

where g is the acceleration due to gravity and h is the height above the ground. Substituting the known values, we get:

PE = (5.00 kg)(9.81 m/s^2)(14.5 m - 3.00 m) = 601 J

Therefore, the potential energy of the shot as it left the hand relative to the ground was:

PE = E - KE = 601 J - 1125 J = -524 J

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Answer:

≈ 192.7 m/s

Explanation:

Let's start by finding the velocity of the block just before it hits the ground. We can use the conservation of energy:

Conservation of energy tells us that these two energies are equal:

mgh = (1/2)mv^2

Solving for v, we get:

v = sqrt(2gh)

Plugging in the given values, we get:

v = sqrt(2 * 9.8 m/s^2 * 1.9 m) = 6.06 m/s

Now, let's use conservation of momentum to find the initial speed of the bullet. We know that the total momentum of the system (bullet + block) is conserved before and after the collision. Before the collision, the momentum is:

p = mb * vb

where mb is the mass of the block and vb is its initial velocity, which is 0 since it is at rest.

After the collision, the bullet and block move together with a common velocity v. The total momentum is:

p = (mb + m) * v

where m is the mass of the bullet. Since momentum is conserved:

mb * vb = (mb + m) * v

Solving for vb, we get:

vb = (mb + m) * v / mb

Plugging in the given values, we get:

vb = (345 g + 7 g) / 7 g * 6.06 m/s = 192.7 m/s

Therefore, the initial speed of the bullet was approximately 192.7 m/s.

Answer:

Explanation:The acceleration due to gravity at a distance equal to one full Earth radius above the surface of the Earth is given by:

g' = g/(1 + R/E)^2

Where g is the acceleration due to gravity at the surface of the Earth, R is the radius of the Earth, and E is the distance of the object from the center of the Earth.

Substituting R for E+R, we get:

g' = g/[1 + (E+R)/R]^2

g' = g/[1 + (1+E/R)]^2

g' = g/[1 + (1+1)]^2 (Since E/R is very small compared to 1)

g' = g/16

Therefore, the acceleration due to gravity at a distance equal to one full Earth radius above the surface of the Earth is g/16. Answer: D. g/4.

Answer:

The acceleration of gravity decreases as you move away from the surface of the Earth. The acceleration of gravity at a height of one Earth radius above the surface can be found using the formula:

g' = (R/(R+h))^2 * g

where R is the radius of the Earth, h is the height above the surface, and g is the acceleration due to gravity at the Earth's surface.

If we plug in R = 6,371 km (the radius of the Earth) and h = 6,371 km (one Earth radius above the surface), we get:

g' = ((6,371 km)/(2*6,371 km))^2 * g

g' = (1/2)^2 * g

g' = g/4

Therefore, the answer is D. g/4.

Answer:

Explanation:

There are several moral theories that could be applicable to this situation, but two that stand out are consequentialism and deontology.

Consequentialism is a moral theory that focuses on the consequences of actions. According to consequentialism, an action is morally right if it leads to the best overall outcome or consequences. In this case, Youngster-A seems to be considering the potential consequences of going to the party, particularly in terms of how it could affect their lives days or weeks later. Youngster-B, on the other hand, seems to be more focused on the immediate pleasure and excitement of attending the party. From a consequentialist perspective, it would be important to consider all of the potential consequences of attending the party before making a decision.

Deontology is a moral theory that emphasizes the duty or obligation to follow certain moral rules or principles. According to deontology, some actions are inherently right or wrong, regardless of their consequences. In this case, there are several moral rules and principles that could be relevant, such as the duty to obey the law, the obligation to avoid harm to oneself or others, and the responsibility to act in a way that aligns with one's values and beliefs. From a deontological perspective, it would be important to consider how attending the party aligns with these moral rules and principles.

Both consequentialism and deontology offer different ways of approaching moral decision-making in this situation. Ultimately, the decision of whether or not to attend the party will depend on the individual's values, beliefs, and priorities, as well as the specific circumstances of the party and potential consequences.

The primary locations for the birth of new stars are in galaxies' spiral arms. The proportion of the galaxy that can participate in star formation increases as more gas and dust become available.

We refer to some spiral galaxies as "barred spirals" because the centre bulge seems extended, like a bar. The spiral arms of the galaxy seem to emerge from the ends of the bar in barred spirals. Elliptical galaxies are round or oval in shape, as their name implies, and have a rather uniform distribution of stars.

The Norma and Cygnus arm, Sagittarius, Scutum-Crux, and Perseus arms are the four principal spiral arms of the Milky Way.

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Answer:

a

Explanation:

a push or a pull that occurs when an object interacts with another object or field.

pls mrk me brainliest

Joule (J). This is the fundamental energy unit of the metric system, or the International System of Units in a later, more thorough version (SI).

The SI unit of energy, the joule (J), was created in honour of James Prescott Joule and his research on the mechanical equivalent of heat since energy is defined through labour. In terms of SI base units, 1 joule is equivalent to 1-newton metre and, in slightly more basic words.

Potential energy, which can be calculated using the formula P.E. = mgh. Unit is the energy that an object has stored due to its position and height. Joules is the SI unit for energy (J).

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Answer: a) 123.1m

b) 279.1m

Explanation:

The maximum height reached by the rocket is 0 meters. The rocket's greatest horizontal range beyond point A is also 0 meters.

To find the maximum height, we can use the kinematic equation for vertical motion. The rocket starts from rest, so its initial vertical velocity is 0 m/s. We can use the equation:

[tex]h = vi^2 / (2 * g)[/tex]

where h is the maximum height, vi is the initial vertical velocity, and g is the acceleration due to gravity. We can calculate h by substituting the given values:

h = (0 m/s)2 / (2 * 9.8 m/s2)

= 0 m

Therefore, the maximum height reached by the rocket is 0 meters above the ground.

To find the rocket's greatest horizontal range, we can use the horizontal motion equations. Since the rocket is subject to gravity only after leaving the incline, we need to find the time it takes for the rocket to reach the highest point on the incline. We can use the equation:

t = vf / a

where t is the time, vf is the final velocity, and a is the acceleration. We can calculate t by substituting the given values:

t = 3.50/ 3.50

= 1s

Now we can use the equation for horizontal motion to find the horizontal range:

[tex]R = v0 * t[/tex]

where R is the horizontal range and v0 is the initial horizontal velocity. Since the rocket starts from rest, v0 = 0 m/s. Therefore, the rocket's greatest horizontal range beyond point A is 0 meters.

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Finding unknown responses for statics beam and truss issues can be done by solving for the total of pressures acting in the x- and y-directions. When in balance, the total of the forces acting in each direction on each beam and truss will be equal to zero.

A beam is a long, slender structural component that can support twisting stresses by deforming transverse to its long axis. It should be noted that bending loads are imparted across the long plane.

Steel beams can have cross-sections in a variety of forms, including square, rectangle, circular, I, T, H, C, and tubular.The normal or axial force, the shearing force, and the bending moment are the three potential internal forces that may be generated when a beam or frame is exposed to transverse loadings, as shown in section k of the cantilever.

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The acceleration of mass m2 to the right is 3.125 m/s².

Let's denote the compression of the spring by x, the acceleration of m1 by a1 to the left, and the acceleration of m2 by a2 to the right.

According to Newton's second law, the force exerted on an object is equal to its mass times its acceleration:

F = ma. In this case, the forces acting on the two masses are the force of the compressed spring and the force of friction between the masses.

For mass m1, the net force is given by:

F1 = -kx - f

where k is the spring constant, x is the compression of the spring, and f is the force of friction. The negative sign in front of kx indicates that the force of the spring is acting to the left. Using Newton's second law, we have:

m1a1 = -kx - f

For mass m2, the net force is given by:

F2 = kx - f

where the force of the spring is now acting to the right. Using Newton's second law, we have:

m2a2 = kx - f

We want to find the acceleration of mass m2, which is given by a2. To do this, we need to eliminate the force of friction f from the above two equations.

To eliminate f, we can add the two equations:

m1a1 + m2a2 = -kx + kx - 2f

Simplifying and substituting the given values, we get:

(2.5 kg)(2.0 m/s²) + (1.6 kg)a2 = 0

Solving for a2, we get:

a2 = -(2.5 kg)(2.0 m/s²)/(1.6 kg) = -3.125 m/s²

Therefore, the acceleration of mass m2 to the right is 3.125 m/s².

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Average force F = 97.52 N acting on window surface.

Pressure on the window: P = 84.39 N/m²

Average force F:

F = mg sinФ

Put the values:

F = 0.05*9.81* sin 67°

F = 0.45 N

Number of hailstones = 216

Average force F = 0.45* 216 = 97.52 N

Pressure on the window:

Pressure = Average force / area

P = 97.52 / 1.156

P = 84.39 N/m²

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The clay ball that could stick to the door would be more effective when you want to shut the door from a distance be throwing a n object.

The effective way to shut the door could be through the use of the clay ball that could stick to the door and push it to the place where it could jam rather than the rubber ball that would bound back.

The best way to shut a door is to use the door handle or knob to pull the door towards you and guide it into the door frame until it clicks shut.

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The statement that are true on the astronaut throwing the wrench in space are:

When the astronaut throws the wrench, the wrench exerts a force on the astronaut, pushing her in the opposite direction. The velocity of the wrench will be greater because it has less mass than the astronaut and therefore can be propelled with greater velocity.

Kinetic energy is proportional to the mass and velocity of an object. Since the wrench has less mass but greater velocity than the astronaut, it will have greater kinetic energy.

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Radiation safety and protection, including: all the given options.

Radiation safety and protection includes various measures taken to minimize radiation exposure to individuals, the environment, and property.

Some of the key components of radiation safety and protection are:

Radiation safety and emergency measures in radiotherapy: This involves ensuring that appropriate measures are in place to minimize radiation exposure to patients, healthcare workers, and the public during radiotherapy procedures.

Compliance with local legislative and licensing requirements, code of practice and local rules: To ensure radiation safety, there are specific laws, codes of practice, and licensing requirements that must be followed by all organizations and individuals working with radiation.

Room shielding design and calculation for radiotherapy equipment and facilities: Shielding is an essential component of radiation safety and involves designing and constructing radiation-shielded rooms and facilities.

Optimization: Optimization involves using the lowest possible radiation dose necessary to achieve the desired outcome in medical procedures.

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Answer: Liquid 1 heats more slowly than 2

Explanation:

Liquid 1 heats more slowly than 2 because it has a higher specific heat.

(Hope this helps!)

Answer:

Explanation:

overgeneralization or applying a single solution to a variety of problems without considering their unique characteristics. This is a common issue in math and other problem-solving situations where individuals may rely too heavily on past successful solutions without adjusting for the specific details of each new problem.

Answer:

After the head-on collision, both identical billiard balls will bounce back at the same speed they had before the collision. This is because of the conservation of momentum, which states that the total momentum of a closed system remains constant if no external forces act on it. In this case, the two billiard balls are a closed system, and their total momentum before the collision is equal and opposite to their total momentum after the collision. Therefore, they will both bounce back with the same speed they had before the collision.

Explanation:

Warm, moist air rises because of the disparity in density between warm, moist air and cold air. This is crucial for clouds to develop.

Puffy cumulus clouds can form in the atmosphere as warm, humid air rises in an updraft. As it rises, the moisture in the air condenses into water droplets. As long as warm air rising from below persists, the cloud will expand.

The air in the lightning channel may reach temperatures of 50,000 degrees Fahrenheit, which is five times hotter than the surface of the sun. After the flash, the air swiftly cools and contracts.

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Answer:

2.34

Explanation:

To find the position where the speed is half of its maximum speed, we can set v = v_max/2 and solve for x:

v_max/2 = ω√(A^2 - x^2)

Substituting the given values, we have:

(ωA)/2 = ω√(A^2 - x^2)

Simplifying and rearranging:

A^2 - x^2 = (A/2)^2

x^2 = A^2 - (A/2)^2

x^2 = (3.00 cm)^2 - (1.50 cm)^2

x = √(6.75 cm^2 - 2.25 cm^2)

x = √5.50 cm^2

x ≈ 2.34 cm

Therefore, the position where the speed of the particle is half of its maximum speed is approximately 2.34 cm from the equilibrium position.