Rubbing a balloon through dry hair gives the balloon a _______________ electric charge

Given what we know, we can confirm that whole-tire recycling has advantages for the environment, as well as economic disadvantages.

Tires are made from rubber mixed with other substances such as steel and certain polyester fibers. This makes the tires a poor source of rubber and said rubber would not be of great quality when recycling, this along with the high cost of the process entails the disadvantages of recycling tires. The advantage, however, is environmental, as tires take up a great portion of the space in landfills and greatly pollute the air when burning.

Therefore, we can confirm that whole-tire recycling has advantages for the environment, as well as economic disadvantages due to its poor quality material and high cost of recycling.

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a

a

a

a

it all depends on you moving the object

According to the law of constant composition, the set of masses resulting from the decomposition should reflect the same relative proportions of elements as the original sample.

The law of constant composition, also known as the law of definite proportions or law of definite composition, states that a particular chemical compound is composed of the same elements in the same proportions by mass, regardless of its source or method of formation. This law implies that the relative masses of the elements in a compound are fixed and constant.

When a compound undergoes decomposition, it breaks down into its constituent elements or simpler compounds. However, the relative proportions of these elements remain the same as in the original compound. This means that the set of masses resulting from the decomposition should reflect the same relative proportions of elements as the original sample.

For example, let's consider a compound composed of elements A and B in a fixed mass ratio of 2:1. According to the law of constant composition, any sample of this compound will have this 2:1 ratio of masses between elements A and B. If this compound decomposes, the resulting set of masses should still exhibit the 2:1 ratio of elements A and B. For instance, if the original sample had masses of 4 grams for element A and 2 grams for element B, the decomposition products should also have masses in a 2:1 ratio, such as 2 grams of element A and 1 gram of element B.

In conclusion, the law of constant composition states that the proportions of elements in a compound remain constant, both in the original compound and its decomposition products. Thus, the set of masses resulting from the decomposition should reflect the same relative proportions of elements as the original sample, in accordance with the law of constant composition.

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The force F1 is equal and opposite to the downward force thus, F1 is equal to 60 N. The force F2 is inclined to 30 ° from leftward force and it is equal to 38.97 N in magnitude.

Force is an external agent acting on a body to deform it or to change its state of motion or rest. Force is a vector quantity and it is characterised by its magnitude and direction.

If two forces acting on a body from the same directions, then the net force will be the sum of these two forces. If they are acting from opposite directions, they will cancel each other in magnitude.

The force F1 is equal and opposite to the force acting downward. Thus its magnitude is 60 N. The force F2 is inclined to 30 ° from horizontal direction.

F2 = 45 cos 30 = 38.9 N.

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In order to compare the numbers, let's put all of them into the decimal form:

We can see that the greater one is 26.8 (all other numbers are close to 2, and this one is close to 27).

The numbers in decrescent order are:

26.8, 271%, 2.62, 2 2/5, 2.26.

Answer:

26.8

Explanation:

2.26 < 2.4 < 2.62 < 271/100 = 2.71 < 26.8

Answer:

no i did not observe anything

Explanation:

Answer:

Decreases by \($3.6 \times 10^{-3}$\) times

Explanation:

The intensity of a sound is defined as the energy of the sound that is flowing in an unit time through the unit area which is in the direction that is perpendicular to the direction of the sound waves movement.

The intensity of energy is described by the inverse square law. It states that the intensity varies inversely with the distance square of the distance.

In other words, the sound intensity decreases as inversely proportional to the squared of the distance.  i.e. \($\frac{1}{r^2}$\)

In the context when the distance was 3 m, the intensity of the sound was = \($\frac{1}{9}$\)

But when the distance became 6 cm or 0.06 m, the sound intensity decreases by =  \($\frac{1}{0.06^2}$\)

                       = \($3.6 \times 10^{-3}$\) times

If a catcher stops a 92 mph (41. 1 m/s) pitch in his glove and slows it to rest in 0. 15 m with a force of 803 N, the ball's mass is 0.14 kg.

According to Newton's Second Law of Motion, when a force acts on a mass, acceleration (or gaining speed) occurs (object). A good illustration of this law of motion in action is when you are riding a bicycle. The mass is represented by your bicycle. The force is generated by your leg muscles as they push against the bicycle pedals.

a = (Vf²- Vi²)/2.d

The distance is 0.15 meters, the initial velocity is 92 miles per hour, or 41 m/s, and the final velocity is 0 (rest).

a= -5603 m/s²

use the second Newton law,

F= m.a

m= F/a

m= 803N/5603 m/s²

m= 0.14kg.

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Answer:

yeah

Explanation:

The information tells you about the rate of decay is that in Florida the reaction occurs more slowly when there is less oxygen in the air.

The reduction in the number of radionuclides per unit time is the rate of decay.

The following table shows that the rate of decay only depends upon the level of oxygen. In Florida concentration of the oxygen in the air is high

Due to this the decay time is less.

The decay time is inversly propotional to the rate of decay. In Florida the rate of decay is high.

Hence the information is that reaction occurs more slowly when there is less oxygen in the air.

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To ensure that the speed of a circular hoop of radius r is equal to that of a sphere at the bottom, the hoop must be released from a height of r/2 above the sphere's release point.

Circular hoops are a set of steel or aluminum rings with an inner diameter of 16 inches, making them ideal for use with woven or braided nets. They are used to support the net and provide a framework for the ball to pass through. For balls up to 18 feet in diameter, we recommend a minimum of four hoops. The motion of rolling without slipping: The motion of rolling without slipping is the movement of an object without slipping.

Rolling without slipping is the motion of a circular object where there is a rolling motion of the object without slipping, meaning that the point on the outer edge of the circular object contacts the ground while rolling. The distance traveled by an object rolling without slipping can be calculated using the formula

S = Rθ

when it travels a distance θ with a radius R.

The answer to the question is that the circular hoop of radius r should be released from a height of r/2 above the sphere's release point in order to match the speed of the sphere at the bottom.

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Answer: P2 = (400 kPa x 1 L) / 3 L = 133.33 kPa

Explanation:

P1V1/T1 = P2V2/T2

P2 = (P1V1)/V2

plug in  values = P2 = (400 kPa x 1 L) / 3 L = 133.33 kPa

Answer:

14,400m

Explanation:

The formula for calculating speed is S=D/T.

S=speed( in meters per second- m/s)

D=distance(in meters)

T=time( in seconds)

For our case:

S=40m/s

D=?

Time=2 hours=60min x 60 sec=3600seconds

Now make D the subject.

D=S x T

D=4m/s x 3600s=14,400m

Therefore our answer is

14 400 m or 14.4 km

A coin falls off a table and is traveling to the ground. There is a net force on the coin which is responsible for the motion of the coin. Thus, the correct option is A.

The net force can be defined as is the sum of all the forces which are acting on an object. Net force acting upon an object can accelerate its mass. Some other forces also acts on a body either at rest or motion. The net force is used in a system when there is a significant number of forces acting on the object.

A coin which falls off a table and is still traveling to the ground. Then, it can be concluded that there is a net force which is acting on that coin which is responsible for the motion of the coin.

Therefore, the correct option is A.

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The magnitude of the charge on each sphere can be calculated using Coulomb's Law, which states that the force between two charges is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.

In this case, we can rearrange the equation to solve for the charge, Q:

Q = √(Fd2/k),

where F is the force (22 mN), d is the distance (16 mm), and k is Coulomb's constant (8.99 x 109 Nm2/C2). Plugging in the values, we get:

Q = √(22 x 10-3 N x 16 x 10-3 m2/8.99 x 109 Nm2/C2)

Q = 0.087 C.

Therefore, the magnitude of the charge on each sphere is 0.087 C.

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Answer:

the image is behind the mirror

virtual

erect(not inverted)

larger than the object

Answer:

the shape of the glass change and the size of the glass also change

Answer:

When a proton is placed directly in the path of the proton cannon, it will experience a strong electromagnetic force. The proton cannon emits a beam of protons at high energy and velocity. When the proton in the path of the cannon interacts with the beam, there will be a collision between the two protons.

During the collision, the protons may undergo a process called scattering, where they change direction and momentum. The exact outcome of the collision depends on the energy and angle of the incoming proton, as well as the properties of the target proton. It is possible that the protons may scatter off each other, transferring energy and momentum in the process.

In some cases, the collision may result in the absorption of the incoming proton by the target proton. This can lead to the formation of a more massive particle or the emission of other particles. The specifics of the interaction will depend on the energy and conditions of the proton cannon and the characteristics of the protons involved.

Overall, placing a proton directly in the path of a proton cannon will result in a collision and potential scattering or absorption of the protons, causing changes in their momentum and possibly leading to the creation of other particles.

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The object believed to lie at the center of the Milky Way galaxy is a **supermassive black hole**.

Extensive observational evidence, including the motion of stars and gas clouds in the galactic center, indicates the presence of a massive and compact object. This object, known as Sagittarius A* (Sgr A*), has a mass of approximately four million times that of our Sun. It is located within a region called the Galactic Center, which is obscured by dust and gas, making direct observations challenging in visible light. However, observations using other wavelengths, such as radio and X-rays, have provided compelling evidence for the presence of a supermassive black hole. The behavior of stars in close proximity to Sgr A*, as well as the energetic processes observed in its vicinity, strongly suggest that it is a black hole with an incredibly strong gravitational pull at the center of our galaxy.

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Answer:

Fr^2 = 75.9N+105.8N=181.7

Fr = 181.7N.

Take into account that the acceleration of the car can be calculated by using the following expression:

where,

vo: initial speed = 0m/s

v: final speed = 18.4m/s

t: time = 27.8s

Replace the previous values of the parameters into the formula for a and simplify:

Hence, the acceleration of the car is approximately 0.66m/s^2

Answer:

Speed of  cannonball just before it hits the ground is  90.77 m/s

Explanation:

Complete Question

A small cannon is placed on top of a fortification. the cannonball leaves the muzzle of the cannon with a speed of 85 m/s at an angle of 25°c above the horizontal. just before the cannonball hits the ground, the vertical component of velocity is 48 m/s downward. what is the speed of the cannonball just before it hits the ground? ignore air resistance.

Solution

Given  

Speed = 85 m/s

The angle = 25 degrees

When it will hit the ground, then vertical velocity = 48 m/s

However, in the projectile motion, the horizontal component will not change  

Vr = V cos (theta) = 85 * cos25

Speed of  cannonball just before it hits the ground is  

V’ = Sqrt (48^2 + (85 * cos 25)^2) = 90.77 m/s

The correct answer is(b). There is a physical change from the solid state to a gas state where energy between the molecules increases.

During sublimation, carbon dioxide transitions directly from the solid state (dry ice) to the gas state without passing through the liquid phase. In this process, individual molecules of carbon dioxide gain energy from the surroundings, leading to an increase in their kinetic energy and molecular movement.

As a result, the carbon dioxide molecules separate from each other and form a gas. This phase change is considered a physical change rather than a chemical change since the chemical composition of carbon dioxide remains the same throughout the process.

Therefore, the sublimation of carbon dioxide results in a physical change where the molecules transition from the solid state to the gas state, gaining energy and increasing their molecular movement.

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Answer:

The net force is the combined effect (the sum) of the real forces acting on the object. ... When there is a net force on an object, it causes the object to accelerate in the direction of the net force; this is not the same as the direction of the motion unless the object is going in a straight line.

Answer:

1

Explanation:

The frequency of an oscillating body is given by :

f = 1/T

Whre

T is the time period or the periodic time

The product of frequency and the periodic time will be :

\(f\times T\\\\=f\times \dfrac{1}{f}\\\\=1\)

Hence, the required product is equal to 1.

Answer:

option A because in sport pain makes a player strongest.......

Answer: Choice C: You should understand the risks of each sport and listen to your body.

Explanation: The statement that BEST describes the process of playing sports is C. You should understand the risks of each sport and listen to your body. It’s important to be aware of the potential risks associated with each sport and to pay attention to your body’s signals to avoid injury.

Answer:

D

Explanation:

Water has a high surface tension because the water molecules on the surface are pulled together by strong hydrogen bonds. That means a drop of water will "want" to have the smallest possible surface area.

Answer: B. I hope you get this right.