3. A body has an initial velocity of 4.0m/s. After 6.0s, the velocity is 12.0m/s. Determine the displacement of the body in the 6.0s. (Δs = 0.5(u + v)t

Explanation:

A train moves at a high velocity. Velocity is the rate of motion, speed or action. An example of velocity is a car driving at 75 miles per hour.

Answer:

there are 3 significant figures.

Explanation:

significant figures are 3,4,7.

Answer:

Transfer of heat through electromagnetic waves

Answer:

Transfer of heat through electromagnetic waves.

I got it right in a test

Answer:

Explanation:

1). To calculate the instantaneous velocity of the object, we will calculate the slope of the line CD.

  Since line CD is a straight line, therefore, slope = 0

  Hence instantaneous velocity = 0

2). Distance of the object when it moves from 0 to 9 seconds

    = Distance traveled from (A to B + B to C + C to D + D to E)

    = 3 + (3 + 0.5) + 0 + 0.5

    = 7 m

3). Displacement = Distance between initial and the final positions of the object

    = 3 - 0

    = 3 m

4). Average velocity = [tex]\frac{\text{Displacement}}{\text{Time}}[/tex]

                                 = [tex]\frac{0.5}{5}[/tex]

                                 = 0.1 m per sec

5). Direction changes have been seen at t = 2 sec and t = 4 sec.

   Hence object changed its direction of travel 2 times.

Answer:

The net force on the box is 2N and it will make the box to move in a leftward direction

Explanation:

We should understand first of all that forces are vectors. This means that they have both magnitude and direction.

The next thing we will need to do is to set a coordinate system. Let the leftward forces be negative while the rightward forces are positive.

That means that the equivalent forces on the box will be -5N + 3N = - 2N

Hence, the net force on the box is 2N and it will make the box to move in a leftward direction

Answer:

6.04 hr

Explanation:

The bus first travels a distance of 210 km south at an average velocity of 85 km/h. The time, t it takes to cover this distance is gotten from d = vt and t = d/v where d = distance and v = velocity.

So, t = 210 km/85 km/h = 2.47 h

The bus then stops for 25 min. We convert 25 min to hours by dividing by 60.

So 25 min = 25/60 hr = 5/12 h = 0.42 h

The bus then travels 230 km south at an average velocity of 73 km/h.

The time it takes to cover this distance is t = 230 km/73 km/h = 3.15 h

So, the total time for the trip is the sum of each individual time, which is 2.47 h + 0.42 h + 3.15 h = 6.04 hr

So, it takes 6.04 hr for  the total trip

What does your model look like and the one it's being compared to?

Answer:

you should prolly put the model

Explanation:

Answer:

- increasing the distance between the objects

- decreasing the mass of one of the objects

- decreasing the mass of both objects

Explanation:

Got it right on Edge 2020.

The gravitational force is decreased by increasing the distance between the objects or decreasing mass of one or both of the objects

According to Newton's law of Universal Gravitation;  The force of gravity is directly proportional to the product of the masses between two bodies and inversely proportional to the square of the distance between them.

F = Gm1m2/r^2

Where;

We can see from the formula above, that the following will result in the decrease of the force between two objects;

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Answer:

Answer:

Social aspect:

In the place of origin migration can create a lack of food, accomodation and other basic services and facilities. Because of influence of lanuage, tradition , culture etc carried by immigrants the native language culture and tradition of the target place may get endangered. This may create diverseness of culture language so there can be disunity and factionalism in society. Target place may have to experience unemployment and criminal activities may take a lead.The place of origin may have to suffer from depopulation and slow development as well..

Economic aspect:

Target place may get some more manpower which results in fast development. But if the manpower is enough or more then unemployment can be resulted. This may cause brain drain. Poverty may take a lead. Landlords may exploit labourers ....

Answer:

Stone has what's called a high thermal conductivity, which is simply a fancypants way of saying that it allows heat to flow through it quickly. For example, suppose the piece of stone in question is at room temperature, or 70 degrees. Your body likes to keep an average toasty temperature of 98.6F.

Answer:

1 kerosene is the pure substance, salt and water is the mixture substance

Answer:

pure substansubdiamond nd sulphur. mixture:salt nd oil ,oil nd water

The ionic compound property useful for writing on the chalkboard is hardness and brittleness

Chalk should be an ionic compound. If there is hardness and brittleness so it is useful for writing on the chalkboard. But for other reasons like high melting point, dissolving in water does not impact it.

Therefore, the above option should be considered.

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Answer:hardness and brittleness

Explanation: im doing the same thing rn

Answer:

1 N

Explanation:

Given that two point charges +3 micro coulomb and +8 micro coulomb repel each other with a force of 40N.

Let us first calculate the distance between the two point charges

F = (KQq)/r^2

Where K = 9.0 × 10^9Nm^2C^-2

40 = (9×10^9 × 3×10^-6 × 8×10^-6)/r^2

Make r^2 the subject of formula

r^2 = 0.216/40

r = sqrt (5.4^-3)

r = 0.0735 metres

If a charge of -5 micro coulomb is added to each of them, then the force between them will become?

Using the same formula again

F = ( KQq)/r^2

Where Q = 8 - 5 = +3 × 10^-6 C

q = 3 - 5 = - 2 × 10^-6 C

F = ( 9×10^9 × 3×10^-6 × 2×10^-6 )/5.4×10^-2

F = 0.054/0.054

F = 1 N

The force of attraction between the two point charges will be 1 N

Answer:

18.15m

Explanation:

Speed * Time = Distance

5.5 * 3.3 = 18.15m

The distance traveled by Robin is equal to 18.15 m with an average speed of 5.5 m/s for 3.3s.

The average speed can be explained as the total distance covered by the object in a definite time. The average speed can be considered a scalar quantity as it exhibits magnitude and no direction.

The average speed of a physical system can be determined from the ratio of the total distance traveled by the system to the time taken to cover that distance.

The average speed equation of a physical system can be written as follows:

Average speed =  Total distance/total time taken

Given, the average speed of the Roin, = 5.5 m/s

The time is taken by Robin for jogging = 3.3 s

The average speed of the Robin can be determined as:

Average spped = Distance/ time

5.5 = Distance/3.3

Distance traveled by Robin = 5.5 × 3.3 = 18.15 m

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Answer:

The noble gases are a group of chemical elements that make up Group 18 on the periodic table. These gases all have similar properties under standard conditions: they are all odorless, colorless, monatomic gases with very low chemical reactivity.

Answer:

10 ohm

Explanation:

Since the resistors are arranged in series, their total resistance is their sum.

Hence, Total R = 2+3+5 = 10 ohm

If a substance was described as smooth, square, and tan, what properties are being referred to its physical properties. Option D is correct.

Any measurable property whose value represents a condition of a physical system is referred to as a physical property.

A system's physical attributes can be utilized to characterize its transitions between brief states. Observable is a term used to describe physical qualities. These aren't modal attributes at all.

If a substance was described as smooth, square, and tan, what properties are being referred to its physical properties.

Hence, option D is correct.

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Answer:

The light from a light bulb

Explanation:

The energy in a ball as it is falling is the right example of mechanical energy. Mechanical energy is the sum of kinetic and potential energy.

Mechanical energy is the energy obtained by the things in which work is performed. Mechanical energy is the energy that an item possesses as a result of its motion or location.

The light from a light bulb. and the light from the sun is a  form of light energy, the heat from a fire is an example of the thermal energy,

The energy in a ball as it is falling is the right example of mechanical energy. Because it includes the potential energy which is the virtue of the position and the kinetic energy due to the motion.

Hence option A is correct

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Answer:

400m

Explanation:

distance = speed x time

20 x 20

=400m

Answer:The awnser would be C!

Explanation:

Hope this helped!

Answer:

C. I will make it a priority.

Explanation:

Answer:

They provide structure and support.

Explanation:

Answer:

A) 5.5 m/s

B) 9.2 m/s

Explanation:

A) Given in the y direction:

Δy = 2.75 m

v₀ = 0 m/s

a = 9.8 m/s²

Find: t

Δy = v₀ t + ½ at²

2.75 m = (0 m/s) t + ½ (9.8 m/s²) t²

t ≈ 0.75 s

Given in the x direction:

Δx = 4.1 m

a = 0 m/s²

t = 0.75 s

Find: v₀

Δx = v₀ t + ½ at²

4.1 m = v₀ (0.75 s) + ½ (0 m/s²) (.75 s)²

v₀ ≈ 5.5 m/s

B) Find vᵧ.

v² = v₀² + 2aΔy

vᵧ² = (0 m/s)² + 2 (9.8 m/s²) (2.75 m)

vᵧ ≈ 7.34 m/s

Find v.

v² = vₓ² + vᵧ²

v² = (5.5 m/s)² + (7.34 m/s)²

v ≈ 9.2 m/s

Answer:

1) acceleration is increased by a factor of four 4X

2) the acceleration increases a factor of 2X

3) the correct answer of 400g

Explanation:

This is a kinematics exercise, where you use the velocity equation to obtain the acceleration, with the final velocity equal to zero.

           v² = v₀² + 2 a x

           0 = v₀² + 2 a x

           a = - v₀² / 2 x

In the case of wanting to give the acceleration as a function of g, we can find the relationship between the two quantities

         a / g = - v₀² / (2 x g)

Let's answer the different questions about this equation

1. The initial velocity is doubled, how much the acceleration is worth

       a/g = - (2v₀) 2 / 2xg

       a = 4 (-v₀² / 2xg) g

acceleration is increased by a factor of four 4X

2. if the stopping distance is reduced by 2, that is, x = x₀ / 2

we substitute

        a/g = (- v₀² / 2g) 2/x

        a =2  (-v₀² / 2x₀g)  g

therefore the acceleration increases a factor of 2X

3. the initial velocity of the hockey player is v₀ = 20 m / s and the stopping distance is

x = 5cm = 0.05m

we calculate the acceleration

        a / g = - 20² / (2 0.05)

        a / g = - 4000 / g

        a / g = - 4000 / 9.8 = 408

        a = 408 g

the correct answer of 400g, the value matches exactly if g = 10 m / s2 is taken

Answer:

12N

Explanation:

Force = mass * acceleration.

6 * 2 = 12

Taking into account the Newton's second law, the force required to accelerate a 6 kg bowling ball at 2 m/s² forward is 12 N.

In first place, acceleration in a body occurs when a force acts on a body. There are two factors that influence the acceleration of an object: the net force acting on it and the mass of the body.

Newton's second law states that this force will change the speed of an object because the speed and / or direction will change. These changes in velocity are called acceleration.

So, Newton's second law defines the relationship between force and acceleration mathematically. This law says that the acceleration of an object is directly proportional to the sum of all the forces acting on it and inversely proportional to the mass of the object.

Mathematically, Newton's second law is expressed as:

F= m×a

where:

In this case, you know:

Replacing:

F= 6 kg× 2 m/s²

Solving:

F= 12 N

Finally, the force required to accelerate a 6 kg bowling ball at 2 m/s² forward is 12 N.

Learn more about the Newton's second law:

Answer:

W = 222 N.

Explanation:

The qiestion says" If the acceleration of gravity on the surface of the planet Mercury is 3.7 m / s2, then what would be the weight of a person with mass 60 kg on its surface? "

Mass of the person, m = 60 kg

The acceleration due to gravity on the surface of gravity is 3.7 m/s²

We need to find the weight of a person on the surface of Mercury.

Weight of an object is given by :

W = mg

So,

W = 60 kg × 3.7 m/s²

W = 222 N

Hence, the person will weigh 2222 N on the surface of Moon.