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MariettaO [177]
3 years ago
13

A scientist wants to test ways to reduce pollution in lake . What is the bestway of doing this

Physics
2 answers:
siniylev [52]3 years ago
7 0

Clean it up hope it's right have a good day



JulijaS [17]3 years ago
6 0

i would think by taking all the water out and storing it somewhere else and filtering it or cleaning it then put it back

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Define energy and provide examples of potential and kinetic energy
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Energy is the capacity for doing work..

Kinetic energy - Moving car

Potential energy - flowing water up the hill

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3 years ago
The largest tendon in the body, the Achilles tendon, connects the calf muscle to the heel bone of the foot. This tendon is typic
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Tension on tendon = 1669800N

Explanation:

Detailed explanation and calculation is shown in the image below

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A hot cube of iron was heated up using 1500 J of thermal energy and was placed in a beaker of water. Before it was heated, the i
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Answer:

451.13 J/kg.°C

Explanation:

Applying,

Q = cm(t₂-t₁)............... Equation 1

Where Q = Heat, c = specific heat capacity of iron, m = mass of iron, t₂= Final temperature, t₁ = initial temperature.

Make c the subject of the equation

c = Q/m(t₂-t₁).............. Equation 2

From the question,

Given: Q = 1500 J, m = 133 g = 0.113 kg, t₁ = 20 °C, t₂ = 45 °C

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4 0
3 years ago
What best describes gravity?
DanielleElmas [232]
 F = G*((m sub 1*m sub 2)/r^2) 
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3 years ago
A man throws a ball straight up to his friend on a balcony who catches it at its highest point. The ball was thrown with an init
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Answer:

The maximum height reached by the ball is 16.35 m.

Explanation:

Given;

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the final velocity of the ball at the maximum height, v = 0

The maximum height reached by the ball is given by;

v² = u² + 2gh

During upward motion, gravity is negative

v² = u² + 2(-g)h

v² = u² -  2gh

0 = u² -  2gh

2gh = u²

h = u² / 2g

h = (17.9)² / (2 x 9.8)

h = 16.35 m

Ttherefore, the maximum height reached by the ball is 16.35 m.

3 0
3 years ago
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