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4 years ago

An object is moving with constant velocity. Which of the following statements is true?

1 answer:

5 0

I think the correct answer from the choices above is option D. The object is moving with constant velocity because there is no frictional force acting on the object. There is no resistance that will cause the object to change its velocity or to stop it.

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The ability to distinguish between acceleration and velocity will be critical to your understanding of many other concepts in th

Sauron [17]

Answer:

Object could only be moving with increasing speed.

Explanation:

Let us consider the general formula of acceleration:

a = (Vf - Vi)/t

Vf = Vi + at -------- equation 1

where,

Vf = Final Velocity

Vi = Initial Velocity

a = acceleration

t = time

FOR POSITIVE ACCELERATION:

Vf = Vi + at

since, both acceleration and time are positive quantities. Hence, it means that the final velocity of the object shall be greater than the initial velocity of the object.

Vf > Vi

It clearly shows that if an object moves with positive acceleration. It could only be moving with increasing speed.

Solving the same equation for negative acceleration shows that the final velocity will be less than initial velocity and object will be moving with decreasing speed.

And for the constant velocity final and initial velocities are equal and thus, acceleration will be zero.

7 0

3 years ago

A 2-kW electric heater takes 15 min to boil a quantity of water. If this is done once a day and power costs 10 cents per kWh, wh

frozen [14]

Answer:

Explanation:

Given data

power P= 2 kW

time t= 15 min to hours = 15/60= 1/4 h

cost of power consumption per kWh= 10 cent = $0.1

We are expected to compute the cost of operating the heater for 30 days

but let us computer the energy consumption for one day

Energy of heater for one day= 2* 1/4 = 0.5 kWh

the cost of operating the heater for 30 days= 0.5*0.1*30= $1.50

Hence it will cost $1.50 for 30 days operation

4 0

3 years ago

What is electrical circuit

n200080 [17]

Path for transmitting electric current. An electric circuit includes a device that gives energy to the charged particles constituting the current, such as battery or a generator; devices that use current, such as lamps, electric motors, or computers; and the connecting wires or transmission lines

5 0

4 years ago

Могут ли быть сообщающиеся сосуды неодинаковы пр своей форме

Rudik [331]

Answer:

Explanation:

they cannot because they contain the same amount of liquid

8 0

4 years ago

Read 2 more answers

Learning Task 3: Read the characteristics of mixtures given in the second column. Identify if it is homogeneous or heterogeneous

madreJ [45]

1. Components can be separated by physical means [heterogenous]

2. The additive component is so finely dispersed in the main ingredient such that it can't be seen [homogenous]

3. Particles are uniformly distributed [homogenous]

4. The substances are identified in different phases [heterogenous]

5. Particles are non-uniformly distributed [heterogenous]

A homogenous mixture is a type of mixture in which the composition is uniform throughout the mixture.

Characteristics of a homogenous mixture:

the mixture is uniform
the composition is the same
it consists of one phase

A heterogenous mixture is a type of mixture in which the composition of the mixture is not uniform

Characteristics of heterogenous mixture include;

it contains two or more ingredients or phases.

different phases mixed together, which are physically separated

samples obtained from different parts of the mixture may have a different composition

In the given characteristics of the mixture in the question we can classify them as follows;

1. Components can be separated by physical means --heterogenous

2. The additive component is so finely dispersed in the main ingredient such that it can't be seen --- homogenous

3. Particles are uniformly distributed ---- homogenous

4. The substances are identified in different phases ---- heterogenous

5. Particles are non-uniformly distributed ---- heterogenous

Learn more here: brainly.com/question/18224061

6 0

3 years ago