3 years ago

The direction of the flow of heat between two bodies depends upon

Physics

1 answer:

vladimir2022 [97]3 years ago

7 0

The energy that is created between the two

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Calcula la energía cinética der un vehículo de 1860kg 1ue se mueve a 50km/h

PtichkaEL [24]

Answer:

Kinetic energy of the vehicle is

$K = 1.79 \times 10^5 J$

Explanation:

Kinetic Energy of the vehicle is given as

$K = \frac{1}{2}mv^2$

now we have

m = 1860 kg

$v = 50 km/h$

$v = 50 \times \frac{5}{18}$

$v = 13.89 m/s$

now we have

$K = \frac{1}{2}(1860)(13.89)^2$

$K = 1.79 \times 10^5 J$

4 0

3 years ago

How much heat is contained in 100 kg of water at 60.0 °C?

attashe74 [19]

First we need to write down heat capacity for water which is constant.
cp=4186 J/(kg*K)

The equation for Energy that we will be calculating is:

E=cp*m*T
where m is mass and T is absolute temperature (273,15 + 60 in this case). Replacing all the values in equation we get:

E = 4186*100*333,15 = 139 456 590 J

6 0

3 years ago

Suppose an object is moving 2.1 m/s north on a river, but the river is flowing to the east at a velocity of 1.2 m/s. What is the

rewona [7]

Answer:

2.4 m/s

Explanation:

Given:

Velocity of the object moving north = 2.1 m/s

Velocity of the river moving eastward = 1.2 m/s

The resultant velocity is the vector sum of the velocities of object and river.

Since the directions of velocity of object and river are perpendicular to each other, the magnitude of the resultant velocity is obtained using Pythagoras Theorem.

The velocities are the legs of the right angled triangle and the resultant velocity is the hypotenuse.

The magnitude of the resultant velocity (R) is given as:

$R^2=2.1^2+1.2^2\\\\R^2=4.41+1.44\\\\R=\sqrt{5.85}\\\\R=2.4\ m/s$