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3 years ago

How are water bottles recycled?

2 answers:

8 0

They are crushed down and melted, the full bottle doesn't get recycled because it is made of toxins so some of each bottle has to be thrown away into some landfill to decompose. But this is bad because plastic toxins take years to decompose and it is adding up

Schach [20]3 years ago

3 0

Cause they are plastic

You might be interested in

An apple is thrown across the cafeteria with a force of 10 N and at an acceleration of 6 m/s2. What is the mass of the apple? ..

Komok [63]

Answer:

Explanation:

F = m * a

The apple's acceleration is not influenced by the acceleration due to gravity for this question. In real life it most certainly is influenced by gravity.

F = m * a

F = 10 Newtons.

a = 6 m/s^2

m = 10/6 = 1.66 kg. Mighty large apple

7 0

4 years ago

A plane takes off from an airport and flies to town A, located d1 = 335 km from the airport in the direction 20.0° north of east

gtnhenbr [62]

Answer:

R = 545.38 m ; θ = 28.43°

Explanation:

given,

for town A : d₁ = 335 km at an direction of 20° north of east

for town B : d₂ = 245 km at 30.0° west of north from town A

x = 335 cos 20° + 245 sin 30°

x = 437.29 m

y = 335 sin 20° + 245 cos 30°

y = 326.75 m

$resultant = \sqrt{x^2+y^2}$

$R =\sqrt{437.29^2+326.75^2}$

R = 545.38 m

$tan \theta = \dfrac{326.75}{437.29}$

θ = 28.43°

4 0

4 years ago

The tape in a videotape cassette has a total

xxMikexx [17]

Answer:

$w=19.76 \ rad/s$

Explanation:

<u>Circular Motion </u>

Suppose there is an object describing a circle of radius r around a fixed point. If the relation between the angle of rotation by the time taken is constant, then the angular speed is also constant. If that relation increases or decreases at a constant rate, the angular speed is given by:

$w=w_o+\alpha \ t$

Where $\alpha$ is the angular acceleration and t is the time. If the object was instantly released from the circular path, it would have a tangent speed of:

$\displaystyle v_t=w.r$

We have two reels: one loaded with the tape to play and the other one empty and starting to fill with tape. They both rotate at different angular speeds, one is increasing and the other is decreasing as the tape goes from one to the other. We'll assume the tangent speed is constant for both (so the tape can play correctly). Let's call $w_1$ the angular speed of the loaded reel and $w_2$ that from the empty reel. We have

$w_1=w_{o1}+\alpha_1 \ t$

$w_2=w_{o2}+\alpha_2 \ t$

If $r_f=35\ mm=0.035\ m$ is the radius of the reel when it's full of tape, the angular speed for the loaded reel is computed by

$\displaystyle w_{01}=\frac{v_t}{r_f}$

The tangent speed is computed by knowing the length of the tape and the time needed to fully play it.

$t=1.8\ h=1.8*3600=6480\ sec$

$\displaystyle v_t=\frac{x}{t}=\frac{249\ m}{6480\ sec}=0.0384 \ m/s$

$\displaystyle w_{01}=\frac{0.0384}{0.035}=1,098 \ rad/s$

If $r_e=10\ mm=0.001\ m$ is the radius of the reel when it's empty, the angular speed for the empty reel is computed by

$\displaystyle w_{02}=\frac{0.0384}{0.001}=38.426 \ rad/s$

The full reel goes from $w_{01}$ to $w_{02}$ in 6480 seconds, so we can compute the angular acceleration:

$\displaystyle \alpha_1=\frac{w_{02}-w_{01}}{6480}$

$\displaystyle \alpha_1=\frac{38.426-1.098}{6480}=0.00576 \ rad/sec^2$

The empty reel goes from $w_{02}$ to $w_{01}$ in 6480 seconds, so we can compute the angular acceleration:

$\displaystyle \alpha_2=\frac{1.098-38.426}{6480}=-0.00576 \ rad/sec^2$

So the equations for both reels are

$w_1=1.098+0.00576 \ t$

$w_2=38.426-0.00576 \ t$

They will be the same when

$1.098+0.00576 \ t=38.426-0.00576 \ t$

Solving for t

$\displaystyle t=\frac{38.426-1.098}{0.0115}$

$t=3240 \ sec$

The common angular speed is

$w_1=1.098+0.00576 \ 3240=19.76 \ rad/s$

$w_2=38.426-0.00576 \ 3240=19.76 \ rad/s$

They both result in the same, as expected

$\boxed{w=19.76 \ rad/s}$

6 0

4 years ago

An element has three stable isotopes. One has a mass number of 63 and an abundance of 50%. The second has a mass number of 65 an

Svetlanka [38]

63x1/2 + 65x0.3 + 67x1/5

64.4 average atomic mass

3 0

4 years ago

You use 35j of energy to move a 7n object. How far did you move it ?

musickatia [10]

Explanation:

Given parameters:

Energy = 35J

Force on object = 7N

Unknown:

Distance moved = ?

Solution:

The energy on the car will cause the car to do work . When work is done, a force moves a body in particular distance. We can see that energy and force are related:

Energy = force x distance

Distance = $\frac{Energy}{force}$

Inputting the parameters:

Distance = $\frac{35}{7}$ = 5m

Learn more:

Work done brainly.com/question/9100769

#learnwithBrainly

8 0

4 years ago