Ask question

Ask question

All categories

3 years ago

10

When water flows from a faucet, the water molecules

2 answers:

vladimir1956 [14]3 years ago

8 0

Answer:

Answer Expert Verified.

Explanation:

The fundamental force responsible for the cohesion of the water molecules leaving the faucet is the electromagnetic force.

joja [24]3 years ago

8 0

Answer:

The water molecules are attracted to each other because of the electromagnetic force.

Explanation:

You might be interested in

Rusting metal is an example of a _________ change. A) phase B) state C) chemical D) physical

sergeinik [125]

Answer:

C. Chemical Change

Explanation:

6 0

3 years ago

Read 2 more answers

How do Newton's laws of motion explain why it is important to keep the ice smooth on a hockey rink so that players can

lord [1]

Answer:

I'm not sure..but please refer to your teacher later.

Answer: Based on Newton's First law of motion (where inertia is involved), smooth ice increases the forceused to accelerate the hockey puck.

Explanation;

smooth ice reduces the resistances between the surface of the figure skates and the ice itself.
based on inertia theory ; the heavier the weight, the larger the inertia.. which explains it takes alot of force to move a heavier object than the lighter ones.. it also hard to *stop* the motion of heavier objects than the lighter ones.
now let's look at the design of the player shoe itself, they have a sharp blade at the bottom of the figure stakes.. which takes us to the law of the force.. the smaller the surface area, the more forces acting on it. So, players force (weight, F= mg) acts on the tip of the blade and on the ice
high inertia (run fast) and high force (attack opponent and pass puck) enables them to perform well in playing hockey
Thus if there's no resistance and the inertia of the player is high then they could run and pass the puck quickly

6 0

3 years ago

Read 2 more answers

A 2200 kilogram car is accelerating at 3.4 m/s/s. what is the NET force?

sdas [7]

We Know, F = m*a
F = 2200 * 3.4
F = 7480 Kg m/s²

So, your final answer is 7480

7 0

3 years ago

A student standing in a canyon yells "echo", and her voice produces a sound wave of frequency of f = 0.61 kHz. The echo takes t

klasskru [66]

Answer:

$d=627.9\ m$ is the distance from the obstacle of reflection.

wavelength $\lamb=0.5279\ m$

Explanation:

Given that:

frequency of sound, $f=610\ Hz$

time taken for the echo to be heard, $t=3.9\ s$

speed of sound, $v=322\ m.s^{-1}$

We know,

$\rm distance = speed \times time$

<em>During an echo the sound travels the same distance back and forth.</em>

$2d=v.t$

$2d=322\times 3.9$

$d=627.9\ m$ is the distance from the obstacle of reflection.

<u>Now the wavelength of sound waves:</u>

$\lambda=\frac{v}{f}$

$\lambda=\frac{322}{610}$

$\lamb=0.5279\ m$

3 0

3 years ago

The driver of a car going 96.0 km/h suddenly sees the lights of a barrier 39.0 m ahead. It takes the driver 0.75 s to apply the

arsen [322]

Answer:

21.42m/S

Explanation:

Hello!

To solve this problem we must perform the following steps.

1. Find the distance traveled from until the driver reacts, this is achieved using the equation for constant speed movement.

X1=VT

where

x= distance traveled

v=initial speed

T=time=0.75s

X1=0.75Vo

we must take into account that the total distance is the sum of the distance at which the pilot reacts (x1) and when it starts to decelerate (x2)

39=0.75Vo+X2

X2=39-0.75Vo

2. Now we use the equation that defines a movement with constant acceleration.

$Vo =\sqrt{Vf^2 - 2(a)(x2)}$

where

Vf = final speed=0m/s

Vo = Initial speed

A = acceleration =-10m/s2

X2 = displacement

now we use the ecuation of step 1

$Vo =\sqrt{Vf^2 - 2(a)(39-0.75Vo)}$

solving

$Vo =\sqrt{0 - 2(-10))(39-0.75Vo)}\\Vo^2=780-15Vo\\Vo^2+15Vo-780=0$

Now we solve the quadratic equation and find the value of Vo

the solutions are 21.42m/S, -36.41m/S

as the speed must be positive we conclude that the answer is 21.42m/S

6 0

3 years ago