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Soloha48 [4]
4 years ago
14

Describe how water may be treated before people use it

Physics
2 answers:
kramer4 years ago
7 0
They purify the water so that people can use it for things and drinking. They chloride, boil, or use ultraviolet light to kill bacterias that can harm us
brilliants [131]4 years ago
3 0
Water is treated by purifying it by adding slaked lime or potash alum

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a car starts from the rest and accelerates at 9.54m/s for 6.5 seconds. what is the distance covered by the car​
uysha [10]

Answer:

= 201.53 meters

Explanation:

A car started from rest and accelerated at 9.54 m/s^2 for 6.5 seconds. How much distance was covered by the car?

Use the formula  d = \frac{at^{2} }{2} ,

where d is the distance, t is the time and "a" is the acceleration.
d=\frac{9*54*6*5^{2} }{2} = 201.53 m

3 0
2 years ago
Calculate the work done by a force of 30 N in lifting a load of 2 kg to a height of 10 m (g = 10 m/s2)
Mars2501 [29]

Answer:

<u>300 J</u>

Explanation:

Given :

  1. Applied force = 30 N
  2. Mass = 2 kg
  3. Height = 10 m
  4. g = 10 m/s²

Work done by the force :

  • Work done = Force x Displacement
  • Work done = mg x h
  • Work done = 30 N x 10 m
  • Work done = <u>300 J</u>

<u></u>

<u><em>Note</em></u> :

  • What you have calculated is the work done by gravitational force on the object (that too, incorrectly)
  • But in the end, it asks for work done by the force of 30N
  • Hence, the given answer ~
3 0
2 years ago
If a bullet travels 2500 meters at a speed of 5 m/s, how long did it<br> take?
MatroZZZ [7]
It would take 500 seconds, because 2500 divided by 5 is 500
3 0
3 years ago
Constructive interference definition physics
elena-14-01-66 [18.8K]

Answer:

the interference of two or more waves of equal frequency and phase, resulting in their mutual reinforcement and producing a single amplitude equal to the sum of the amplitudes of the individual waves.

8 0
3 years ago
A book has a weight of 15 N. What is the mass of the book
Ahat [919]

Answer:

m = 1.531kg

Explanation:

F = mg

m = F/g

m = 15/9.8 = 1.531kg (Approximately)

6 0
3 years ago
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