I need help with this

Answer:

the distance traveled by the dog is 27.18 m.

Explanation:

Given;

initial velocity of the dog, u = 7.92 m/s

final velocity of the dog, v = 3.22 m/s

time of motion, t = 4.88 s

The distance traveled by the dog is calculated as;

[tex]s = (\frac{v+u}{2} )t\\\\s = (\frac{7.92 + 3.22}{2} )(4.88)\\\\s = 27.18 \ m[/tex]

Therefore, the distance traveled by the dog is 27.18 m.

Answer: The distance traveled by the car once around the racetrack = 100 meters.

Explanation:

Given: The length of the track = 100 meters

Then, the distance traveled by the car around the racetrack = Length of the track = 100 meters.

Hence, the distance traveled by the car once around the racetrack = 100 meters

Answer:

at T = 0ºC the change of state is from the solid state to the gaseous state

Explanation:

In this exercise we are asked about the changes of state, from the data we will assume that the material is water.

Water can exist in three solid states, liquid and gas, in a graph of pressure ℗ against temperature (T) there is a point called triple at T = 0.01ºC, below this point the curve has two states at high pressure solid and low pressure gas.

As a result of the previous ones at T = 0ºC the change of state is from the solid state to the gaseous state

Answer:

wind turbine

Explanation:

Answer:

g wind turbine

Explanation:

look up the song dancing in the sky

Answer:

1.5X10^-4C

Explanation:

Expression for the electric force between the two charges is given by -

F = (k*q1*q2) / r^2

Here, k = constant = 9 x 10^9 N*m^2 / C^2

q1 = unknown

F=25N

q2 = 1.9x10^-6 C

r = 0.32 m

Substitute the given values in the above expression -

25=9x10^9 *(q1) * 1.9 x10^ -6/ (0.32m)^2

25= 17,100* (q1)/ 0.1024

multiply both sides by 0.1024 to get rid of the denominator

2.56=17,100*(q1)

Divide both sides by 17,100 to isolate q1

q1=1.5x10^-4C

Answer:

100 cm away from you

Explanation:

Found a good example demonstrating this problem I think:

Answer:

False.

Explanation:

Behavior modification is a therapeutic process that is focused on changing any undesirable negative behavior in an individual through the use of positive or negative consequence and biofeedback.

This simply means that, behavior modification typically involves the process in which a desired behavior is reinforced while withholding reinforcement for any undesired behaviors.

Behavior modification is typically based on operant conditioning principles, through negative or positive reinforcement, undesirable behaviors developed by an individual are mainly replaced with more desirable ones.

Hence, behavior modification can be used to correct human behaviors or disorders such as enuresis (bed-wetting), Obsessive-Compulsive Disorder (OCD), generalized anxiety disorder, Attention-Deficit/Hyperactivity Disorder (ADHD), phobias, etc.

However, behaviors can still come back or be exhibited by an individual even if they have been extinguished through operant conditioning.

Operant conditioning can be defined as an associative learning process which involves reinforcing the strength of a behavior.

Answer:

Flase

Explanation:

edge2021

Answer:

[tex]a=12.5\ m/s^2[/tex]

Explanation:

Given that,

The speed of the bucket tied to a rope, v = 5 m/s

The radius of the circle, r =2 m

We need to find the magnitude of the centripetal acceleration of the bucket. The formula for the centripetal acceleration is given by :

[tex]a=\dfrac{v^2}{r}\\\\a=\dfrac{(5)^2}{2}\\\\a=12.5\ m/s^2[/tex]

So, the centripetal acceleration of the bucket is [tex]12.5\ m/s^2[/tex].

Answer:

A. True

Explanation:

It is true that when there is no temperature difference between a substance and its surrounding, no net energy is transferred as heat.

The term used for this is thermal equilibrium. Thermal equilibrium occurs when two substances or even places are at the same temperature.

Answer:

95 x 1.6 = 51.78 is your answer

Explanation:

the question is asking for the weight of the object so you multiply and get 51,78

An astronaut has a mass of 95 kg so his weight on earth's moon where the acceleration due to gravity is 1.6 m/s² is 152 N.

The acceleration that an object experiences as a result of the gravitational force is known as acceleration due to gravity. ms² is its SI unit. It has a direction and a magnitude. It is a vector quantity as a result.

The letter g stands in for the acceleration brought on by gravity. Its typical value at sea level on the surface of the earth is 9.8 ms2. The second law of motion and the law of universal gravitation of Newton serve as the foundation for its computation formula.

According to the question, the given values are :

Mass, m = 95 kg

Acceleration due to gravity, g = 1.6 m/s²

The formula is :

W = m × g

W = 95 × 1.6

W = 152 N

So, the astronaut's weight on the Earth's moon will be 152 N.

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Answer:

The work done in winding the spring gets stored in the wound up spring in the form of elastic potential energy (i.e potential energy due to change in shape). ... During this process, the potential energy stored in it gets converted to kinetic energy. This turns the wheels of the toy car.

Explanation:

Answer:

Both elastic potential energy and kinetic energy at t initial are converted to internal energy t f.

Explanation:

Apply the principle of Conservation of Energy to the system, where friction is present. Between t i and t f, the elastic potential energy in the spring and the kinetic energy of motion are being transformed into internal energy.

(I can't put t and f together because it got censored so that's why there is a space. Usually they are together.)

It would be a parallel circuit.

Answer:

c

3 half lifes have passed to get to 1/8

1/2 then 1/4 then 1/8

so 15*3

Explanation:

Answer:

Southern Hemisphere

Explanation:

Answer:

0.5sec

Explanation:

Parameters

Height(H) =20m

Initial velocity(u) = 5m/s

Acceleration due to gravity(g) =10m/s^2

Method one

Using the second law of motion

H=ut-1/2gt^2

20=5t-1/2×10×t^2

20=5t-5t^2

dh/dt = 5-10t

where any constant is zero therefore the 20 is zero

5-10t=0

Collect like terms

-10t= -5

t=1/2 = 0.5sec

2nd method

Parameters

Height(H) =20m

Initial velocity(u) = 5m/s

Acceleration due to gravity(g) =10m/s^2

Using the time taken formula

t=u/g

t=5/10

t=0.5sec

Answer:

A Matter is not created or destroyed and the same amount of mass remains

Explanation:

In a chemical reaction, according to the law of conservation of matter, "matter is neither created nor destroyed and the same amount of mass remains in such a process".

Answer:

yeah physical quantities are the quantities which can be meaured

Answer:

10N

Explanation:

Given data

Work done = 200J

distance= 20m

We want to find the applied force

From

Work done= Force * distance

substitute

200= F*20

F= 200/20

F= 10N

Hence the force applied is 10N

Answer:

Acceleration is the rate of change of velocity.

Answer:Condensation

Explanation:

Answer:

Condensation

Explanation:

Condensation is the process by which water vapor in the air is changed into liquid water.

"Water vapor"

"Becomes"

"Liquid water"

The water vapor converted into liquid water, which is the process of condensation.

Hope it helped!

Have a supercalifragilisticexpialidocious day!

The number of electrons is the atomic number of an atom. It is equal to the number of protons as well. Bromine  has a central nucleus composed of 35 protons and 45 neutrons, surrounded by an electron cloud containing 35 electrons.

Bromine is 35th element in periodic table. It is a non-metal in the 17th group known as halogen family. Bromine is relatively electronegative and forms ionic compounds with metals.

The atomic number of an atom is the number of electrons in its neutral state. In a neutral atom the number of electrons and protons are equal. Mass number of an atom is the sum of number of protons and neutrons.

Atomic number of Br is 80. Hence, the number of electrons and protons in it is 35. Its mass number is 80. Thus, number of neutrons is 80 - 35 = 45. Thus, option D is correct.

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Answer:

weight gravitational force

Explanation:

I hope it helps you

Answer:

mass depends on acceleration due to gravity and weight

w=mg

m=w/g

If the speed of an object does NOT change, the object is traveling at uniform speed.

Answer:

answer is uniform

Explanation:

Answer:

true if it is less dense than the liquid its in it will float

Explanation:

Answer: The density of an object determines whether it will float or sink in another substance. An object will float if it is less dense than the liquid it is placed in. An object will sink if it is more dense than the liquid it is placed in.

so yes it will float

Answer:

a) F =489.95 N

b) W = 490 N

c) both have same value

Explanation:

a)

The force of gravitation between two objects is given by Newton's Law of Gravitation. According to this law:

[tex]F = \frac{Gm_{1}m_{2}}{r^{2}}\\[/tex]

where,

F = Gravitational Force between the person and Earth = ?

G = Universal Gravitational Constant = 6.67 x 10⁻¹¹ Nm²/kg²

m₁ = mass of peerson = 50 kg

m₂ = mass of earth = 5.98 x 10²⁴ kg

r = distance between person and earth = radius of earth = 6.38 x 10⁶ m

Therefore,

[tex]F = \frac{(6.67\ x\ 10^{-11}\ Nm^{2}/kg^{2})(50\ kg)(5.98\ x\ 10^{24}\ kg)}{(6.38\ x\ 10^{6}\ m)^{2}}\\\\[/tex]

F = 489.95 N

b)

The weight of the person will be given as:

[tex]W = m_{1}g\\W = (50\ kg)(9.8\ m/s^{2})[/tex]

W = 490 N

c)

Both have same value

Answer:

simple answer is C ok you

Answer:

The velocity of the rat after he pushes the cheese is 5 m/s

Explanation:

The question relates to the Law of conservation of linear momentum, which states that the total momentum in an isolated system is constant

The given parameters are;

The mass of the rat, floating, m₁ = 2.2 kg

The velocity with which the rat pushes the cheese away from himself, v₃ = 10 m/s = The final velocity of the cheese

The mass of the cheese, m₂ = 1.1 kg

Assuming that the initial velocity of the rat, v₁ = The initial velocity of the rat, v₂ = 0 m/s

Let, 'v₄', represent the velocity of the rat after he pushes the cheese, by the law of conservation of linear momentum we have;

The total initial momentum = The total final momentum

The total initial momentum = m₁·v₁ + m₂×v₂ = 2.2 kg × 0 m/s + 1.1 kg × 0 m/s = 0 kg·m/s

The total initial momentum = 0 kg·m/s

The total final momentum = m₁·v₄ + m₂×v₃ = 2.2 kg × v₄ + 1.1 kg × 10 m/s = 2.2·v₄ kg·m/s + 11 kg·m/s

The total final momentum = 2.2·v₄ kg·m/s + 11 kg·m/s

By the equality of the total initial momentum and the total final momentum, we have;

0 kg·m/s = 0 = 2.2·v₄ kg·m/s + 11 kg·m/s

2.2·v₄ kg·m/s + 11 kg·m/s = 0

2.2·v₄ kg·m/s = -11 kg·m/s

v₄ = -11 kg·m/s/(2.2 kg·m/s) = 5 m/s

The velocity of the rat after he pushes the cheese = v₄ = 5 m/s.

Answer: its slowing down

Explanation:

The car is slowing down because its on the corner of the track.

If it were to go the same speed the other cars are going while on the straight part of the track it would go off the track therefore the car must slow down to stay in the race

The pickup truck has a changing velocity as it is slowing down. This is because the truck is on the corner of the truck.

An object can change its velocity in a number of different ways as it can slow down, it can speed up, or it can change its direction of motion. A change in the speed, or a change in the direction of motion, or a change in both the speed and direction of motion of the object means that the object has an overall change in velocity.

The pickup truck is slowing down because it is on the corner of the track. If it were to go on with the same speed as the other cars are going in the direction while on the straight path of the track it would go off the track and therefore the car must slow down to stay in the race of vehicles.

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Answer:

work done to move a charge from one point to another point is known as potential difference between the points