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2 years ago

What causes heat flow

Physics

1 answer:

Alex787 [66]2 years ago

4 0

Answer:

Heat flow is the movement of heat.

Explanation:

Heat flows in solids by conduction, which occurs when two objects in contact with each other transfer heat between them. That happens because the molecules hit each other, and the faster moving molecules in the hot object spread that energy into the cooler object

Credit to, https://study.com/academy/lesson/heat-flow-in-solids-fluids.html

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A force of 6.0 N acts on a 3.0 kg object at rest for 10 seconds.

MAVERICK [17]

The beginning momentum of the object is zero

Explanation:

The momentum of an object is given by:

$p=mv$

where

m is the mass of the object

v is its velocity

For the object in this problem, we have:

m = 3.0 kg is its mass

v = 0, because it is initially at rest, so its initial velocity is zero

Therefore, the initial momentum of the object is

$p=(3.0)(0)=0$

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5 0

3 years ago

A hot-air balloon of diameter 12 mm rises vertically at a constant speed of 15 m/sm/s. A passenger accidentally drops his camera

jeka94

To solve this problem we will apply the linear motion kinematic equations. With the information provided we will calculate the time it takes for the object to fall. From that time, considering that the ascent rate is constant, we will take the reference distance and calculate the distance traveled while the object hit the ground, that is,

$h = v_0 t -\frac{1}{2} gt^2$

$-18 = 15*t + \frac{1}{2} 9.8*t^2$

$t = 3.98s$

Then the total distance traveled would be

$h = h_0 +v_0t$

$h = 18+15*3.98$

$h = 77.7m$

Therefore the railing will be at a height of 77.7m when it has touched the ground

5 0

3 years ago

A water hose is used to fill a large cylindrical storage tank of

ludmilkaskok [199]

Answer:

maximum possible speed by solving above equation for 7D is

$v_{max} = \sqrt{\frac{49}{5}gD}$

minimum possible value of speed for solving x = 6D is given as

$v_{min} = \sqrt{9gD}$

Explanation:

Let the nozzle of the hose be at the origin. Then the nearest part of the rim of the tank is at (, ) = (6, 2) and the furthest part of the rim is at (, ) = (7, 2).

The trajectory of the water can be found as follows:

$x = (v_o cos45) t$

$y = (v_o sin45) t - \frac{1}{2}gt^2$

Now from above two equations we have

$y = x - \frac{gx^2}{v_o^2}$

now we know that height of the cylinder is 2D so we have

$x - \frac{gx^2}{v_o^2} = 2D$

by solving above equation we have

$x = \frac{v_o^2 \pm v_o^2\sqrt{1 - \frac{8gD}{v_o^2}}}{2g}$

now we know that maximum value of x is 7D

so the maximum possible speed by solving above equation for 7D is

$v_{max} = \sqrt{\frac{49}{5}gD}$

minimum possible value of speed for solving x = 6D is given as

$v_{min} = \sqrt{9gD}$

6 0

3 years ago

Help with Number 4 plz <3

vitfil [10]

Nevermind that one i dont know sorry

8 0

4 years ago

I believe that our solar system formed by the same process as star formation. A huge cloud of dust and gas collapsed and condens

xz_007 [3.2K]

Nebular hypothesis.

Explanation:

The first version of the nebula hypothesis was proposed by Immanuel Kant and Pierre Laplace.
Today the hypothesis has been revised to fit into more current and update realities about how our solar system emerged.
The hypothesis is the widely accepted explanation to the origin and evolution of the solar system.
It suggests that the star and the planets that makes up the solar system were products of a huge cloud of dust called the nebular.
The nebular is a huge mass of interstellar dusts.
The cloud collapsed and condensed under gravitational pull of the materials.
A center core that resulted in the formation of our star, sun emerged and the rest of the particles formed our planet.

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4 0

4 years ago