which one thank youuu!​

Answer:

a) 0.01s

b) 100Hz

Explanation:

Period is defined as the time taken by a wave to complete 1 oscillation.

Since the object completes 2500 cycles in 25secs, we can write

2500cycles = 25secs

1 cycle = x

Cross multiply

2500x = 25

x = 25/2500

x = 0.01secs

Hence the period of its rotation is 0.01secs

b)  is the reciprocal of the period

Frequency = 1/Period

Frequency = 1/0.01

Frequency = 100Hertz

Hence the frequency of rotation is 100Hz

Answer:

steam is a gas

Explanation:

Answer: Steam is an invisible gas, unlike water vapor, which appears as a mist or fog.

Explanation:

Answer:

5.24m/s

Explanation:

Given parameters:

Initial velocity  = 4.7m/s

Acceleration  = 5.4m/s²

Time  = 0.1s

Unknown:

Final velocity of the particle = ?

Solution:

Acceleration is the rate of change of velocity with time.

   Acceleration  = [tex]\frac{v - u}{t}[/tex]  

v is the final velocity

u is the initial velocity

t is the time taken

  Now find v;

           5.4  = [tex]\frac{v - 4.7}{0.1}[/tex]  

             0.54  = v  - 4.7

          v  = 5.24m/s

Answer:

No. of electrons = 88

Explanation:

Given that,

No. of protons = 88

No. of neutrons = 226

We need to find the number of electrons it have in a radium atom.

In an atom, the number of protons is equal to the number of electrons. There are 88 protons in this case.

Hence, there are 88 electrons in the radium atom.

Answer:

a = 0.1067 [m/s²]

Explanation:

In order to solve this problem, we must first draw a free body diagram with the forces acting on it.

a)

In the attached image we can find the free body diagram.

b)

The net force can be found by performing a sum of forces on the X-axis, these forces are seen in the free body diagram.

∑Fx = Fr

where:

Fr = resultant force [N] (units of Newtons)

[tex]F_{r}=275+275-310\\F_{r}=240[N][/tex]

c)

Acceleration can be found by means of Newton's second law, which tells us that the sum of the forces in a body or the resulting force is equal to the product of mass by acceleration.

∑F = m*a

where:

m = mass = 2250 [kg]

a = acceleration [m/s²]

[tex]240=2250*a\\a=0.1067[m/s^{2} ][/tex]

Answer:

pushes or pulls

Explanation:

hope this helps....

Answer:

A Both physical and chemical changes.

Explanation:

Answer:

P = 0

Explanation:

Momentum is defined as the quentity of motion contained in a body. Mathematically, it can be defined as the product of mass and velocity. So, in order to determine the Volkswagen Beetle, at rest, we can use the simple formula, as follows:

[tex]P = mv[/tex]

where,

P = Momentum of Volkswagen Beetle = ?

m = Mass of Volkswagen Beetle = 750 kg

v = Velocity of Volkswagen Beetle = 0 m/s (since, it is at rest)

Therefore,

[tex]P=(750)(0)[/tex]

P = 0

The answer is B- the slope of a velocity vs. time graph.

Answer: The amplitude or height of a wave is measured from the peak to the trough

Explanation: The wavelength is measured from peak to peak. Otherwise wavelength is directly related to the frequency of a given wave form

Answer:

X is ammeter and Y is voltmeter

Explanation:

The resistance of a wire is directly proportional to the length of the wire. That is the longer the length of the wire, the higher the resistance and the shorter the length of the wire, the smaller the resistance.

Ammeter is a measuring instrument used to measure the current in a circuit by connecting the meter in series with the circuit.

Ammeter is a measuring instrument used to measure the potential difference between two points by connecting the meter in parallel to the points.

Meter X is an ammeter since it is connected in series and meter Y is a voltmeter because it is connected in parallel.

Answer:

the rate of change of velocity

Answer:

12.6

Explanation:

Answer:

Total displacement = 0

Explanation:

He lives his front porch and still returns to his front porch.

Now, displacement is a vector quantity and as such, it is the distance between the initial point of movement and the final point of movement.

In this case the initial point is the same as the final point and thus the displacement is zero.

Answer

Potential energy

Explanation:

When the pencil is sitting on the desk, it has maximum potential energy and minimum kinetic energy. As it falls, its velocity increases, which increases the kinetic energy

The one that is best set to use for separating a mixture of water, sugar, and pebbles is a filter and a hot plate. The correct option is B.

A mixture is made up of one or more pure substances that have varying compositions.

Mixtures are classified into two types: heterogeneous and homogeneous. Heterogeneous mixtures have distinct components, whereas homogeneous mixtures appear uniform throughout.

During distillation, the sugar solution is heated, causing water to evaporate and leaving the sugar behind.

After that, the water vapor is passed through an inclined tube. It cools due to the cold water around it and condenses to form water in a separate container.

Filters can generally separate mixtures of solids in liquids, solids in gases, and solids in solids. Filtration is the separation of unwanted particles from desired particles.

Thus, the correct option is B.

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Answer:

It will have the same KE ( 450 J ) just before it hits the ground. The GPE transferred to KE is the same in both cases and the original KE is the same in both cases so the total will be the same.

The one thrown sideways will take longer to get to the ground but it will have the   same   velocity ( and therefore KE ) as the       thrown down stone.

Explanation:

Answer:

18

Explanation:

EDGE2021

An alert driver must be able to react of the unexpected actions of other drivers. Hence, option A is correct.

Traffic is made up of people using public ways (roadways) for movement, such as walkers, cars, trains, and animals being ridden or herded.

The road rules include traffic rules and unwritten guidelines that may have evolved through time to help ensure the timely and orderly flow of traffic. Traffic laws control and regulate traffic. In general, organized traffic has lanes, right-of-ways, priorities, and intersection traffic control.

In many jurisdictions, traffic is formally structured with designated lanes, junctions, intersections, junctions, traffic signals, or signage.

The three main categories of traffic are heavy motor vehicles, other vehicles, and pedestrians. Speed restrictions and easements may be shared by different classes, or they may be segregated.

Therefore, an alert driver must be able to react as per the other drivers, so it can prevent any mishappening.

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Answer:it’s c

Explanation:

Answer:

an unstable atomic nucleus emits energy

Explanation:

just toke quiz

Answer:

inversely proportional

Explanation:

I know this because I'm learning this right now. My teacher told me that Coulomb's Law is important because it shows us the positive and negative attraction between the two charges. It also tells us that if we have two like charges, then they're going to repel, but the closer they get, the bigger charge it's going to have. Coulomb's Law tells us the force between charged particles is inversely proportional to their charges.

Answer: A  a mechanical wave travels through empty space, while an electromagnetic wave travels through matter.

Explanation: A mechanical wave travels through empty space, while an electromagnetic wave travels through matter. A mechanical wave has a short wavelength, while all electromagnetic waves have long wavelengths.

Answer:

floating is important in swimming because if you are ever in a bad position possibly in the ocean and get tired of swimming you can float.

Explanation:

Answer:

The answer is A, I just took the quiz :)

ik you already got the answer, but just in case anyone else who gets this question looks here, the person who said A was right!!

The total mass of the product nuclei is greater than the mass of the target nucleus

"Nuclear fission products are the atomic fragments left after a large atomic nucleus undergoes nuclear fission. Typically, a large nucleus like that of uranium fissions by splitting into two smaller nuclei, along with a few neutrons, the release of heat energy (kinetic energy of the nuclei), and gamma rays."

"Change in the identity or characteristics of an atomic nucleus, induced by bombarding it with an energetic particle. The bombarding particle may be an alpha particle, a gamma-ray photon, a neutron, a proton, or a heavy ion."

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Answer:

B) an alcohol-inspired coma

There are three types of alcohol one is primary second is secondary and third is tertiary. Therefore, the correct option is option B that is  an alcohol-inspired coma.

Alcohol is a chemical molecule with a functional group called hydroxyl linked to a saturated carbon atom. Alcohols classified as primary have just one alkyl group on which the carbon atom of the hydroxyl group (OH) is connected.

Secondary alcohols are those that have two alkyl groups on either side of the carbon atom of the hydroxyl group. In tertiary alcoholic group, the carbon that is bonded to hydroxyl group is bonded to three alkyl groups. If a person rapidly drinks a large amount of alcohol, it could lead to what is known as an alcohol-inspired coma.

Therefore, the correct option is option B.

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Answer:

True

Explanation:

The Gravitational potential energy is given by:

G = mgh

m = mass of body ; g = acceleration due to gravity ; h = height

G for a ball of mass 10kg ; height of 20 meters above the ground

G = 10kg * 9.8m/s² * 20m = 1960 kgm²/s²

G for a ball of mass 1000kg at height, 0 meters :

G = 1000 * 9.8 * 0 = 0

1960 > 0

Hence, Gravitational potential energy for 10kg ball at height 20m is greater Thammfor a 1000kg ball on the ground.

Answer:

Voltage or electromotive force

Explanation:

The voltage or electromotive force in an electrical circuit causes current to flow from a point of higher electrical potential to that of a lower electrical potential in the electric circuit. So, when Priscilla closes the circuit, the electromotive force makes current to flow in the circuit and thus turn on the bulb.

Answer:

Eelas = 5 [J]

Explanation:

Elastic energy is associated with the ability that has a spring or any other material with elastic properties.

We can calculate the elastic energy by means of the following equation:

[tex]E_{elas}=\frac{1}{2} *k*x^{2}[/tex]

where:

k = constant spring = 2.5 [N/m]

x = distance stretched = 2 [m]

[tex]E_{elas}=\frac{1}{2} *2.5*(2)^{2}\\E_{elas}=5[J][/tex]

Answer:

A. heat

Explanation:

heat isn't a physical thing like all the rest of the options