This is an example of A) alpha decay B) beta decay C) gamma decay D) half-life decay

Answer:

C.Electrical energy to heat and kinetic energy

Answer:

D. 24 m

Explanation:

Running up - velocity     + 30 m/min

Escalator 's moving down  velocity   - 24 m/min

Sum velocity (30 - 24) = 6 m/min

6 m/min * 4 min = 24 m

Answer: Extinction

Explanation: Extinction simply means cessation. A condition whereby an action or behavior exhibited by an individual or organism eventually stops. In psychological parlance, extinction is usually attributed to the discontinuance of a certain behavior usually due to non - reinforcement or eventual absence of the conditioned stimulus.

In the scenario above, the point at which Mary stopped sneezing is called extinction which is due to the removal of the cat which is the cause of Mary's sneezing behavior.

Answer:

answer in photo:

Explanation:

Elements:

Compounds:

A chemical element can be defined as a pure substance that is represented by a symbol and it comprises one type of atom that has the same atomic number (number of protons) in its nuclei.

Basically, a chemical element is a pure substance that can't be broken down, decomposed or transformed into simpler substances by chemical or physical means.

In Chemistry, some examples of a chemical element include the following:

A chemical compound can be defined as a substance that is represented by a formula and it contains two or more types of atoms, which can be chemically broken down.

Some examples of a chemical compound are:

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Answer:

Straining method

Explanation:

Straining method is the method that can be used to separate parts of a liquid mixture when the entire mixture can pass through a filter.

Answer: D) 3.2 × 10^8

Explanation: Insulators are best described as materials which are poor conductors of electricity and hence do not allow passage of electricity through them. Resistivity are hence used to describe property or characteristic of a material which does not allow the flow or passage of electric current.

In summary, materials which high resistivity values are referred to as Insulators. Conversely, those with low resistivity or high conductivity values are called conductors while those with intermediate values are named semiconductors.

In the question given above, the material with a resistivity value of 3.2 × 10^8 - - - has a very high resistivity value (320000000Ω), the other options given have very low resistivity values ; 0.0000000017, etc and are most likely to be conductors due to their excessively low resistivity values.

Answer:

gravitational force increases

Explanation:

Since gravitational force is inversely proportional to the square of the separation distance between the two interacting objects, more separation distance will result in weaker gravitational forces. So as two objects are brought closer to each other, the force of gravitational attraction between them also increases.

The correct answer is B) Giving Congress the power to create courts

Explanation:

One of the principles the Constitution mentions in the preamble is Justice, this is mentioned in "We the people of the United States, in order to form a more perfect union, establish justice..." According to this, a priority is to make the country have justice, which is possible through courts, laws, among others. In this context, the action that would be allowed is "Giving Congress the power to create courts" because this might ensure the justice principle is applied in the U.S.

Answer: The pattern of colors that repeat in a thin soap film is a result of the interference of light waves reflecting off the front and back surfaces of the film. The specific colors seen are determined by the thickness of the film, with different wavelengths of light being reflected or refracted at different angles, creating the characteristic rainbow pattern.

Answer:

d. decreasing the mass of the car

Explanation:

Engineers are trying to improve race cars. Their goal is to increase the acceleration of the car using the same engine, it can be achieved by decreasing the mass of the car, therefore the correct answer is option C.

Newton's Second Law states that The resultant force acting on an object is proportional to the rate of change of momentum.

As given in the problem Engineers are trying to improve a race car. Their goal is to increase the acceleration of the car using the same engine,

The acceleration of the car can be increased by decreasing the mass of the car assuming the engine of the car is producing the same amount of force.

Thus, the acceleration can be increased by decreasing the mass of the car, therefore the correct answer is option C.

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Answer:

Zero (0)

Explanation:

Zero is only counted significant in some cases, and some of those are listed in the question.

For eg, 0.0003 (here 0 is insignificant), however, 3000.003 (here all 0's are significant)

Answer:

1. Possibility of all life being wiped out

2. Ecosystem being imbalanced.

3. Loss of one species triggers the lost of others as the food chain will collapse.

Answer:

a

Explanation:

Answer:

A. It is relative to the sun only when the train is not moving.

Explanation:

Answer:

B

Explanation:

If  the pilot, who has a mass of 80 kg, decides to eject from the airplane. With the reduced total mass,then the new approximate acceleration of the airplane will be 5.2 m/s²

Newton's Second Law states that The resultant force acting on an object is proportional to the rate of change of momentum.

The mathematical expression for Newton's second law is as follows

F = m*a

where F represents the force applied

m is the mass of the object

a is the acceleration of the object

The initial acceleration of an airplane with a total mass of 850 kg has an engine malfunction, causing it to provide a constant horizontal force of 4000 N.

F =m*a

4000 N = 850×a

a= 4.7 m/s²

An acceleration of airplane when the pilot, who has a mass of 80 kg, decides to eject from the airplane. With the reduced total mass,

the horizontal force is the same 4000 N, now the total reduced mass the airplane is 770 kg

F =m*a

4000 =770×a

a = 5.2 m/s²

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Answer:

The correct answer to the question is objects have zero acceleration.

Explanation:

Before answering the question, first we have to understand dynamic equilibrium .

A body moving with uniform velocity is said to be in dynamic equilibrium if the net external forces acting on the body is zero. Hence, the body is under balanced forces.

If the external forces acting on a body is not balanced, then the body will accelerate which will destroy its equilibrium condition. Hence, the necessary and sufficient condition for a body to be in dynamic equilibrium is that the forces are balanced.

When a body is in dynamic equilibrium, the body moves with uniform velocity along a straight line unless and until it is compelled by some external unbalanced forces.

Hence, the rate of change of velocity or acceleration of the body will be zero.

Answer:

objects have zero acceleration.

Explanation:

Answer:

67

Explanation:

Answer:

35

Explanation:

It's a trick question!

Because the younger sister was half the age of Becky when she was 6. She also has to be half the age of Becky today.

So, 70 ÷ 2 = 35

Hope this helps you out! : )

Answer:

Data is pieces of information recorded in an experiment because data are individual pieces of factual answer recorded and used for the analysis

Explanation:

I hope this will help you :)

Answer:

D. 14 AWG

Explanation:

Ampacity is defined as the maximum current carry by a conductor without increasing the temperature rating.

All branch circuit conductors shall have an ampacity of at least 14 AWG.

That is why 14 AWG electric wire is a stranded copper wire widely used in circuits.

Hence, the correct option is D. 14 AWG.

Answer:

7/150

Explanation:

The following data were obtained from the question:

Object distance (u) = 75cm

Image distance (v) = 3.5cm

Magnification (M) =..?

Magnification is simply defined as:

Magnification (M) = Image distance (v)/ object distance (u)

M = v /u

With the above formula, we can obtain the magnification of the image as follow:

M = v/u

M = 3.5/75

M = 7/150

Therefore, the magnification of the image is 7/150.

Answer:

-0.0466

Explanation:

Answer:

A) 9.8m/s this answer is correct.

The acceleration is increasing by 0.9m/s^2 .

so, in each second it will increase by 0.9m/s^2.

Therefore, in 2 second

0.9 * 2

= 1.8m/s

Now,

8 + 1.8

= 9.8m/s

Answer:

D

Explanation:

The correct answer would be in the axle of the wheels while you ride your bicycle.

Options A, B, and C requires that the forces of friction is increased in order to have more control.

However, option D requires that there is a minimal frictional force in the axle of the wheels of a bicycle while riding so that a little effort would be required to keep the bicycle moving.

The lesser the friction, the lower the effort that would be needed to keep the bicycle moving and vice versa.

Answer:

Viscosity is a measure of how much a liquid resists flowing freely.

Answer:

velosity is the anser

Explanation:

sorry for the spelling

Answer: M = 14.3

Explanation:

Given the following :

Object distance (u) = 32cm

Focal length (f) = 30.1 cm

Magnification = image distance (v) / object distance (u)

Recall ; 1/f = 1/u + 1/v

1/30.1 = 1/32 + 1/v

1/v = 1/30.1 - 1/32

1/v = (32 - 30.1) / 963.2

1/v = 2.1 / 963.2

1/v = 0.0021802

v = 1/0.0021802

v = 458.66666 cm

Therefore, Magnification 'M' = v / u

M = 458.66666 / 32

M = 14.333333

M = 14.3

Answer:

M = -15.8

Explanation:

object distance = 32cm

focal length = 30.1 cm

To find M we first need to find di or image distance

I will use the equation: 1/f = 1/di + 1/do

By changing the equation to 1/f - 1/di = 1/do we get 0.0019725

equation with numbers plugged in:

1/30.1 - (1/32) = 0.0019725

To change 1/do to do we divide 1 by 0.0019725

You should get 506.97

Now use the equation

M = -(di/do)

M = -(506.97/32)

You should get M = -15.8

That statement is false. It's exactly the opposite direction.

In circular motion, the "centripetal" force ... and therefore the centripetal acceleration ... points TOWARD the center.

Answer:

False

Explanation:

Took The Quiz

Answer:

The radius of orbit will decrease by 1/4, the satellite will come closer to Earth

Explanation:

The orbital speed of any body revolving in an orbit around another boyd is given by:

v (orbital) = √(G · M(central body)/R)

Where G is the gravitation constant.

If the body, e.g satellite is moving around the Earth, then the mass of central body M will also be a constant. Therefore, the only thing on which the orbital velocity will depend on will be Radius of the orbit R.

v ∝ 1/√R

√R ∝ 1/v

Take square:

R ∝ 1/v²

If the velocity of satellite will doubles, then:

R' ∝ 1/ (2v)²

R' ∝ 1/4v²

R' ∝ (1/4)(1/v²)

R' ∝ (1/4)(R)

The radius of orbit will decrease by 1/4, the satellite will come closer to Earth

Answer:

The correct option is:

B) Kinetic Energy

Explanation:

We know that if a body is placed at a certain height, it possesses Potential Energy, which is represented by 'mgh'. In this case, when the skydiver is present in the plane, before jumping, he has potential energy as he is at height 'h'.

As Kinetic energy is given as '(1/2)mv²' dependent on velocity of the object, when the skydiver jumps of the plane, his height starts decreasing, which decreases his Potential Energy. As energy can neither be created or destroyed, but is converted to one form or another, all this Potential energy starts to convert into Kinetic energy. As Potential Energy decreases with distance, Kinetic energy increases. Hence, line B represents Kinetic Energy.

Answer:

Explanation:

Formula for calculating radius is

r=.529A x n^2 where A=10^-10m

So put n=1,2,3,4............

Answer:

force

Explanation:

Answer:

force

Explanation: