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1 year ago

How do I know if i’m doing number 2 right?

Physics

1 answer:

Ksju [112]1 year ago

8 0

We are given an object that is speeding up on a level ground.

Let's remember that the gravitational energy depends on the change in height, therefore, if the object is not changing its height it means that the gravitational energy remains constant.

The kinetic energy depends on the velocity. If the velocity is increasing this means that the kinetic energy is also increasing.

Now, every change in velocity requires acceleration and acceleration requires a force. The force and the distance that the object moves are equivalent to the work that is transferred to the object and therefore, the change in kinetic energy. This means that the total energy of the system increases as work is transferred to the mass.

We have that the total energy of the system increases in the form of kinetic energy and that the gravitational potential energy remains constant. Therefore, the diagrams should look like pie charts that grow but the area of the segment of the potential energy stays the same. It should look similar to the following.

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Students have been assigned to write reports on cell organelles. Eric’s report is about the organelle that supports and gives st

mojhsa [17]

Eric is writing about the cell wall.
Chloroplast is for photosynthesis.
Mitochondria releases energy from respiration.
Nucleus controls the activities of the cell.
But the cell wall supports and gives structure to the cell.

4 0

3 years ago

Read 2 more answers

If V is a velocity, l a length, and v a fluid property having dimensions of L2T-1, which of the following combinations are quali

olasank [31]

Answer:

(b) Vl/v

Explanation:

The dimension for V is LT-1

The dimension for Length is L

The dimension for time is T

The fluid property v has a dimension of L2T-1, which is equal to square of the length divided by time.

for (a) Vlv

LT-1×L× L2T-1

= L^4T^-2

(b) Vl/v

LT^-1 ×L/ L^2 T^-1

=1. ; this is dimensionless.

(c)V2v

(LT^-1)^2 × L^2 T^-1

= L^4 T^-3

(d) V/(lv)

LT^-1/(LL^2 T^-1)

= L^-2

4 0

3 years ago

When the liquid line is restricted, the supply of refrigerant to the metering device is reduced. What is the effect on suction p

Nimfa-mama [501]

Answer:

The suction pressure decreases and the superheat increases when the liquid line is restricted and the supply of refrigerant to the metering device is reduced.

Explanation:

1. The five components of refrigeration are:

Fluid refrigerant
Compressor
Condenser coil
Evaporator coil
Expansion device.

The compressor limits the vapor released by the refrigerant. This

causes a rise in pressure (in refrigerant), which then pushes the

vapor into the coils on the outside of the refrigerator.

2. Now when the cooler air meets the warm gas present in the coils, it

gets converted into liquid form.

3. Thus, when the liquid form is at high pressure, the refrigerant then

cools down as it flows through the coils placed in the fridge ( in both

freezing and normal sections).

4. The refrigerant also absorbs the warm air present in the fridge, which

causes it to evaporate and flow back through the compressor and the

cycle repeats in the same form.

Thus, when the liquid line is restricted and the supply of refrigerant to the metering device is reduced it causes a decrease in suction pressure and an increase in superheat.

Learn more about refrigeration here:

<u>brainly.com/question/9046279</u>

#SPJ4

8 0

2 years ago

What is the mathematical equation for resistivity

nordsb [41]

Answer:

See below

Explanation:

rho = R A/l R = resistance A = cross sectional area l = length

7 0

2 years ago

A car advertisement states that a certain car can accelerate from rest to

Evgen [1.6K]

Answer:

8 km/h²

Explanation:

a = v-u/t

v is final velocity, u is initial velocity

a = 40-0/5

a = 8.0 km/h²

5 0

3 years ago