How much energy is transferred to the engine by burning gasoline?.

The velocity of the laundry bag before collision is 4.22 m/s. The collision of two objects in the absence of an external force does not affect the momentum of the two bodies.

Collision is the sudden, forceful coming together of two objects in direct contact with each other, such as, two billiard balls, a golf club and a ball, a hammer and a nail head, two cars when being coupled together.

In order to solve this problem, the principle of conservation of momentum can be applied. This tells us that the momentum of a system is preserved before and after a collision.

Both the movements i.e., bag and cart are positive, since they both move in the same direction. Now, the momentum of objects before the collision is equal to the momentum of objects after the collision.

This can be represented as:

m₁ × v₁ = m₂ × v₂

Here, m₁ = mass of the laundry bag = 22kg

v₁ = velocity of the laundry bag

m₂ = sum of the mass of laundry bag and cart = 9kg

v₂ = velocity of the moving cart = 3m/s

m₁ × v₁ = m₂ × v₂

22kg × v₁ = (22+9)kg × 3m/s

v₁ = (31kg × 3m/s)/ 22kg

v₁ = 93/22

v₁ = 4.22m/s.

Therefore, the velocity of the laundry bag before collision is 4.22m/s.

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Answer:

when all forces acting on an object remain the same

None of the choices is correct.

Equilibrium is the condition when all forces acting on an object are balanced. Then, the object doesn't accelerate.  It continues in constant, uniform motion. It moves at a constant speed (which may be zero), and in a straight line.

Answer:

Explanation:

When resistors are connected in parallel combination, then equivalent resistance is given by,

\( \to \quad \bf{ \dfrac{1}{R_1} + \dfrac{1}{R_2} =\dfrac{1}{R_p}}\)

Inserting values,

\( \to \quad \bf { \dfrac{1}{R_1} + \dfrac{1}{R_2} =\dfrac{1}{R_p} } \\ \\ \to \quad \bf { \dfrac{1}{R_1} + \dfrac{1}{221} =\dfrac{1}{120.7} } \\ \\ \to \quad \bf { \dfrac{221+R_1}{(R_1)(221)} =\dfrac{1}{120.7} } \\ \\ \to \quad \bf { \dfrac{221+R_1}{221R_1} =\dfrac{1}{120.7} } \\ \\ \to \quad \bf { 120.7(221+R_1) = 221R_1(1)} \\ \\ \to \quad \bf { 26674.7 + 120.7R_1= 221R_1} \\ \\ \to \quad \bf { 26674.7= 221R_1- 120.7R_1} \\ \\ \to \quad \bf { 26674.7 = 100.3R_1} \\ \\ \to \quad \bf { \dfrac{26674.7 }{100.3} =R_1} \\ \\ \to \quad\underline{\boxed{ \bf { 265.9 \; \Omega=R_1}}} \\ \)

Answer:

B is the right answer

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Yes, there does appear to be an externality associated with tire production.

This is because tire production often involves the release of pollutants and emissions into the environment, which can have negative effects on the health and well-being of individuals and ecosystems. Additionally, the disposal of tires can also lead to environmental damage if they are not properly recycled or disposed of. Therefore, the costs of tire production and disposal are not fully borne by the producers and consumers of tires, but also by society as a whole, making it an example of a negative externality.

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Answer

v= 1/R mark me brainliest pls

Answer:

Just as images are reflected from the surface of a mirror, light reflected from a smooth water surface also produced a clear image. ... Consequently, the outgoing rays are reflected at many different angles and the image is disrupted. Reflection from such a rough surface is called diffuse reflection and appears matte.

Explanation:

hi po I hope it's help you

Given,

The mass of the board, m=5 kg

The reading on the weighing board near the feet of Annabelle, F₁=380 N

The reading of the weighing board near the head of Annabelle, F₂=280 N

The total distance between the two weighing boards, d=2.50 m

Let us assume that the centre of mass of the board lies exactly at its geometrical centre. Thus the distance of the centre of mass of the board from either of the weighing boards is l=2.50/2=1.25 m

a)

As the system is in equilibrium, the total downward gravitational force is equal to the upward reaction force applied by the boards. Thus,

Where M is the mass of Annabelle and g is the acceleration due to gravity.

On substituting the known values,

Thus Annabelle's mass is 62.35 kg

b)

The entire system is also in rotational equilibrium and net torque is zero.

Let us assume that the weighing board near Annabelle's feet is the pivot point of the system.

Therefore,

Where d_c is the distance of the centre of mass of Annabelle from her feet.

On rearranging the above equation,

On substituting the known values,

Thus the centre of mass of Annabelle is 1.05 m from her feet.

a=(−k/m)x is the correct expression that gives the block's acceleration at a displacement xxx from the equilibrium position.

The acceleration of an object is equal to its mass divided by the net force exerted on it, or a = F m, in accordance with Newton's second law of motion. When an object's mass and the net force acting on it are known, its acceleration can be calculated using this equation for acceleration.

There is no restoring force when the mass reaches the equilibrium position. Since there is no acceleration, the mass is traveling at its fastest possible rate. Amplitude is the term used to describe the particle's largest departure from its mean position.

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Answer:

-11,813.87N

Explanation:

According to coulombs law, the Force between the two charges is expressed as;

F = kq1q2/d²

k is the coulombs constant = 9*10⁹kg⋅m³⋅s⁻²⋅C⁻².

q1 = -0.00067 C

q2 = 0.00096 C

d  = 0.7m

Substitute into the formula:

F =  9*10^9 *  -0.00067 * 0.00096/0.7²

F = 9*10⁹*-6.7*10⁻⁴*9.6*10⁻⁴/0.49

F = -578.88*10⁹⁻⁸/0.49

F = -578.88*10/0.49

F = -5788.8/0.49

F = -11,813.87N

Hence the force between the two charges is -11,813.87N

: Molecular magnet can refer to : molecular based magnet . An unconventional magnetic material that consists of organic molecules cordination compounds and combination

Answer:

so i believe your answer is abt 1800-2400

Explanation:

According to the Dietary Guidelines for Americans 2010, sedentary teen girls between the ages of 13 and 18 need 1,600 to 1,800 calories per day, while active girls require 2,200 to 2,400 calories each day

No, 53cm is less than 5m.

Answer:

7 m

Explanation:

They began walking 6 meters to the right, so +6.

Then 3 meters left so -3,

And then 4 meters to the right again so +4.

4+6-3=7 meters

The length of the edge of its unit cell  is  mathematically given as

a = 420 pm

Extending from one point to another, length is the unit of measurement for distance.

According to the SI, length is a distance dimension. Typically, a length unit is selected as the basis for the system, with all other units of measurement being derived from it.

The metre is the fundamental length standard used throughout the International System of Units.

Generally, the equation for density  is  mathematically given as

density = Z x M / No x a3

Therefore

density = 4 x 74.6 / 6.02x10^23

density = 6.67 g/cm3

In conclusion,

6.67 g/cm3 = (4)(74.6) / (6.02x1023)(a3)

a3 = 7.43x10-23 cm3

a = 420 pm

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Answer:

Explanation:

The resistance of this device is determined by using the formuia from Ohms Law:

V = IR

where; V = voltage

I = current

R = resistance

From the above equation:

R = V/ I ---- (1)

And

I = P/V    --- (2)

If 1 unit = 1 KWH = 3.6 × 10⁶ J

Then;

2.2 units = (3.6 × 10⁶ × 2.2)

= 7.92 × 10⁶ J

So, Energy = 7.92 × 10⁶ J

Also:

Power = energy/time

Power =  7.92 × 10⁶ J / 1 hour

Power = 7.92 × 10⁶ J / 3600 seconds

Power = 2200 Watts

From equation (2)

I = P/V

I = 2200/220

I = 10 A

Recall that:

Resistance R = V/I

Resistance R = 220/10

Resistance R = 22 ohms

SO, if 1 unit costs = Ts 6.00

Then the cost of 2.2 unit = 2.2 ( Rs  6.00)

= Rs 13.20

Answer:

c) Both the parts will weigh the same

Explanation:

center of gravity is based on weight so if you cut down the center of gravity you would have 2 equal parts

(might be D if it is cutting against the center of gravity)

Answer:

0.0000126

hope it help u....

If you see a displayed diver-down flag while boating, it is necessary to maintain a certain distance from the flag for safety reasons. The specific distance may vary depending on local regulations and circumstances, but it is generally recommended to stay at least 100 feet away from the flag.

A diver-down flag is used to indicate the presence of divers in the water. Its purpose is to alert boaters to the potential hazards and to ensure the safety of the divers. The exact distance you must stay away from the flag may be specified by local laws or regulations, so it is important to familiarize yourself with the rules of the area you are boating in.

In many places, a common guideline is to stay at least 100 feet away from the diver-down flag. This distance allows for a safe buffer zone to prevent any accidental collisions or disturbances to the divers. However, it's crucial to check and adhere to the specific regulations in your boating location, as they may vary and could require a different distance to be maintained. Prioritizing safety and respecting the presence of divers is essential to avoid any accidents or harm to both boaters and divers.

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K s²/2, or the compressed spring's energy is transformed into the kinetic energy of the ball, m v²/2. The calculated value is 4.61 cm

This is,

m v²/2 + Ff b = k s/2

k s² - 2 Ff b = m v²

Sqrt(((k s2 - 2 Ff b)/m) = v

Using real numbers in place of:

Sqrt((8.01N/m (5.01cm) - 2. 0.0326N. 15.9cm)/5.2g) yields the value v.

equals sqrt((201 N cm²/m - 1.037 N cm)/5.2g)

= square root ((0.0201 Nm - 0.01037 Nm)/0.0052kg)

1.37 m/s = sqrt(1.872 m²/s²)

The ball passes through two phases before it leaves the muzzle.

The force of the spring, which is slowed down by the force of friction, accelerates it at first.

This accelerating force begins at its greatest level and progressively diminishes to zero.

The only force the ball encounters for the remainder of its course is friction, which slows it down.

The point where the accelerating force equals zero is where the ball is moving at its fastest.

That occurs at point x when the spring's force, k (s - x),

lowered by the frictional force, Ff, to zero.

k(s - x) - Ff = 0

x = s - Ff/k

replacing with actual numbers,

x = 8.01N/(5.01cm - 0.0326N)

is equal to 5.01cm - 0.0326N/(0.0801N/cm) = 4.61cm

The complete question is- A toy cannon uses a spring to project a 5.20-g soft rubber ball. The spring is originally compressed by 5.01 cm and has a force constant of 8.01 N/m. When the cannon is fired, the ball moves 15.9 cm through the horizontal barrel of the cannon, and the barrel exerts a constant friction force of 0.032 6 N on the ball.

(a) With what speed does the projectile leave the barrel of the cannon?

(b) At what point does the ball have maximum speed?

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Speed is a scalar quantity because it is only represented by magnitude not a direction.

The second thinnest coating of magnesium fluoride for a lens system primarily used for 695 nm red light is approximately 503 nm.

Wavelength is the distance between identical points (adjacent crests) in the adjacent cycles of a waveform signal propagated in space or along a wire.

To determine the second thinnest coating of magnesium fluoride for a lens system primarily used for 695 nm red light, we will use the formula for thin film interference:

t = (mλ) / (2n)
where t is the thickness of the coating, m is the order of interference (1 for the thinnest coating, 2 for the second thinnest, etc.), λ is the wavelength of light (695 nm), and n is the index of refraction of MgF₂.

For the second thinnest coating (m=2), we can calculate the thickness:
t = (2 * 695 nm) / (2 * 1.38) ≈ 503 nm

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it depends upon what state they are in like in motion or res

Answer:

If it is a true mixture, the mixing enthalpy is negligible, and there is no reaction or phase change, then you can do this using exclusively the temperatures of the individual compounds and their heat capacities. Any other process that takes place needs to be taken into account separately.

The solution can be found by understanding that we’re only using state variables. You can design any complicated process that starts with the starting situation and ends up at the ending situation, and the state variables will be the same. And sometimes a complicated process is easier to calculate than the simple one-step process, like here when mixing multiple components.

One way that will work is to start by bringing all compounds to the lowest temperature of either of the compounds. All but one of the compounds must be cooled down for this; make sure to calculate for each of the components how much energy is released. Now, mix all the components together. In the simplest situation sketched above you can calculate the heat capacity of the mixture by adding all the heat capacities of the components. Use this total heat capacity to calculate how much you can heat up the mixture using the energy you saved in cooling down the components earlier. This will be your desired end situation.

In case there are any phase changes or other processes in between, you need to take the energy needed for those into account too but in very similar ways.

Answer:

1.solid

2.gas

3.liquid

4.liquid and gas

5.gas

6.liquid

7.gas

8.liquid and gas

The moment of inertia of this combination about an axis perpendicular to the bar and through one of the balls is 5.71 kgm².

The moment of inertia is a measure of how resistant an object is to changes in its rotational motion.

The moment of inertia of any object is obtained from the product of mass and square of radius of the object.

Mathematically, the moment of inertia of the rod and the points masses is calculated by apply the following equation.

I = ¹/₁₂ML²  +  2m(L/₂)²

where;

The moment of inertia of this combination about an axis perpendicular to the bar and through one of the balls is calculated as follows;

I = ¹/₁₂(2.6)(3.5)²  +  2(0.5)(3.5/₂)²

I = 2.65 + 3.0625

I = 5.71 kgm²

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Speed and velocity related to velocity specifies both the speed and the direction of a moving object.

In contrast to velocity, which takes into account both the speed and direction of an object's movement, speed is the rate of movement along a path. Alternatively stated, velocity is a vector and speed is a scalar value.

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Answer:

Explanation:

2 min 20 sec = 140 sec .

In 40 sec  one round

In 140 sec 140 / 40 round = 3.5 round .

That means the boy will be positioned at the diametrically opposite corner of the square path .

side of square path = 15 m

length of diameter = 15√2

= 21.21 m

Displacement of boy is 21.21 m .

Answer:

An object at rest remains at rest

Explanation:

An object at rest stays at rest and an object in motion stays in motion with the same speed