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GaryK [48]
3 years ago
12

Nanotechnology is proving ineffective at helping clean up PCB’s. True orFalse

Physics
2 answers:
tester [92]3 years ago
8 0
False, <span>Nanotechnology is proving effective at helping clean up PCB’s.</span>
Eddi Din [679]3 years ago
7 0
It is FALSE just took the test on ed,genuity
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g As observed on earth, a certain type of bacteria is known to double in number every 24 hours. Two cultures of these bacteria a
tangare [24]

Answer:

86.4 hrs

Explanation:

The amount of bacteria is initially 1

It doubles every 24 hrs.

After first 24 hrs, the amount = 2

After next 24 hrs = 4

After next 24 hrs = 8

After next 24 hrs = 16

After next 24 hrs = 32

After next 24 hrs = 64

After next 24 hrs = 128

After next 24 hrs = 256

Total time taken to reach 256 = 24 x 8 = 192 hrs

For the bacteria culture on the rocket that travels at a speed of 0.893c relative to the earth, this time is contracted by the relationship

t = t'(1 - ¥^2)^0.5

Where t is the contracted time =?

t' is the time on earth

¥ = v/c

Where v is the speed of the rocket

c is the speed of light

since v = 0.893c

¥ = 0.893

Substituting, we have

t = 192 x (1 - 0.893^2)^0.5

t = 192 x 0.2025^0.5

t = 192 x 0.45 = 86.4 hrs

8 0
3 years ago
Why hasnt my dad came back yet, he was just buying some milk, please tell me what happened to him.
choli [55]
The world is running dangerously low on milk so he is going all around the world looking for affordable milk just because he loves you so much and needs to get you that milk
8 0
3 years ago
Read 2 more answers
Bonus: What is the velocity of an 8 kg lead shot-put if it has 484 J of energy? Type here to search e​
Dima020 [189]

Answer:

11m/s

Explanation:

Given parameters:

Mass of the lead shot = 8kg

Energy of the shot  = 484J

Unknown:

Velocity of the shot  = ?

Solution:

To solve this problem, we apply the kinetic energy formula;

        K.E  = \frac{1}{2} m v²  

m is the mass

v is the unknown

 Now, insert the parameters and solve;

        484  = \frac{1}{2} x 8 x v²

        484  = 4v²

           v² = 121

            v  = 11m/s

7 0
3 years ago
You are standing on the bottom of a lake with your torso above water. Which statement is correct?
marishachu [46]

Answer:

c. There is a buoyant force that is proportional to the volume of your body that is below the level of the water.

Explanation:

Buoyancy can be defined as a force which is created by the water displaced by an object.

Simply stated, buoyancy is directly proportional to the amount of water that is being displaced by an object.

Hence, the greater the amount of water an object displaces; the greater is the force of buoyancy pushing the object up.

The buoyancy of an object is given by the formula;

Fb = pgV

But, \; V = Ah

Hence, \; Fb = pgAh

Where;

Fb = buoyant force of a liquid acting on an object.

g = acceleration due to gravity.

p = density of the liquid.

v = volume of the liquid displaced.

h = height of liquid (water) displaced by an object.

A = surface area of the floating object.

The unit of measurement for buoyancy is Newton (N).

In this scenario, you are standing on the bottom of a lake with your torso above water. Thus, there is a buoyant force that is proportional to the volume of your body that is below the level of the water.

3 0
3 years ago
HELPPPP QUESTION IS ABOVE
anygoal [31]

Answer:

discount rate

Explanation:

i could be wrong but i believe thats what it is

3 0
3 years ago
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