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Alexus [3.1K]
3 years ago
13

Develop a power point presentation to which you explain how convection works by using ocean water as an example. In your present

ation, give details about where the water is moving during convection and why it is moving. Describe how water temperature is measured, and how you would measure to show thermal energy transfer.
Physics
1 answer:
Ede4ka [16]3 years ago
4 0
I wonder what is going to change when you can be used for the day and the temperature changes to a substance that you have learned to eat and drink a lot more water and water you have a water.
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Rzqust [24]
6. Drop to one quarter of its original value
7 0
2 years ago
(a) Calculate the force (in N) needed to bring a 1100 kg car to rest from a speed of 85.0 km/h in a distance of 125 m (a fairly
nasty-shy [4]

(a) -2451 N

We can start by calculating the acceleration of the car. We have:

u=85.0 km/h = 23.6 m/s is the initial velocity

v = 0 is the final velocity of the car

d = 125 m is the stopping distance

So we can use the following equation

v^2 - u^2 = 2ad

To find the acceleration of the car, a:

a=\frac{v^2-u^2}{2d}=\frac{0-(23.6 m/s)^2}{2(125 m)}=-2.23 m/s^2

Now we can use Newton's second Law:

F = ma

where m = 1100 kg to find the force exerted on the car in order to stop it; we find:

F=(1100 kg)(-2.23 m/s^2)=-2451 N

and the negative sign means the force is in the opposite direction to the motion of the car.

(b) -1.53\cdot 10^5 N

We can use again the equation

v^2 - u^2 = 2ad

To find the acceleration of the car. This time we have

u=85.0 km/h = 23.6 m/s is the initial velocity

v = 0 is the final velocity of the car

d = 2.0 m is the stopping distance

Substituting and solving for a,

a=\frac{v^2-u^2}{2d}=\frac{0-(23.6 m/s)^2}{2(2 m)}=-139.2 m/s^2

So now we can find the force exerted on the car by using again Newton's second law:

F=ma=(1100 kg)(-139.2 m/s^2)=-1.53\cdot 10^5 N

As we can see, the force is much stronger than the force exerted in part a).

8 0
3 years ago
Gravitational forces is ------ force​
mel-nik [20]

Answer:

Gravitational force is <u>noncontact</u> force

Explanation:

Contact force occurs due to the contact between two different objects. Non-contact force occurs due to either attraction or repulsion between two objects such that there is no contact between these objects. There is no field linked with the contact force. ... Gravitational force is an example of a non-contact force.

7 0
2 years ago
1.Sobre a queda-livre,assinale V para verdadeiro e F para falso
lisov135 [29]

Answer:pelo o que eu sei é ..

V

V

V

F

F

F

Explanation:

8 0
3 years ago
Which one of the following substances is a liquid fuel used in rocket engines?
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The substance which is a liquid fuel used in rocket engines is liquid oxygen. The correct answer is A.
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