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4 years ago

2. Why are numbers better than words in a science experiment?

1 answer:

8 0

Why words are more important than numbers: ... Words on the other hand are harder to manipulate, they also tell you why someone voted a particular way and to improve your delivery and thus your customer satisfaction you need to understand the why's...

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Which would be the best way to represent the concentration of a 1.75 M K2CrO4 solution

AlekseyPX

1.75 moles per litre K2CrO4

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4 years ago

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no links never ever in the world give me a link just answer now without links What is the lithosphere? please write a full parag

nasty-shy [4]

Answer:

the solid outerpart of the earth

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3 years ago

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A car weighing 9800 N travels at 30 m/s. What braking force brings it to rest in 100m? In 10 m?

Svetach [21]

As per kinematics equation we know that

final speed of the car = 0 m/s

initial speed is given as 30 m/s

distance moved = 100 m

now we have

$v_f^2 - v_i^2 = 2 a d$

$0 - 30^2 = 2(a)(100)$

$a = - 4.5 m/s^2$

now braking force is given as

$F = ma$

now for mass we know that the weight of car is

$W = mg = 9800 N$

so mass of car is

$m = 1000 kg$

now we have

$F = 1000(4.5) = 4500 N$

Part b)

Again we have

final speed of the car = 0 m/s

initial speed is given as 30 m/s

distance moved = 10 m

now we have

$v_f^2 - v_i^2 = 2 a d$

$0 - 30^2 = 2(a)(10)$

$a = - 45 m/s^2$

now braking force is given as

$F = ma$

mass of car is

$m = 1000 kg$

now we have

$F = 1000(45) = 45000 N$

4 0

3 years ago

A load of 36 N attached to a spring hanging

Annette [7]

Answer: 115.38N

Explanation:

Firstly, let's determine the constant.

Hooke's law was discovered by Robert Hooke in 1660.

Using hooke's law which states that provided the elastic limit of an elastic material is not exceeded, the force is equal to the extension applied provided all factors are kept constant.

Hooke's Law is a principle of physics that states that the force which is needed to extend or compress a spring by some distance is proportional to that distance

Therefore,

Force=kx

K= F/x

Where Force= 75m

x= 0.065m

K= 75/0.065m

K= 1153. 846N

We can use the constant to find the force when the distance that is stretched(x) is known.

Here

Force=kx

F= 1153.846 × 0.10

F= 115.38N

The force required to stretch it by this amount is 115.38N.

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3 years ago

A tree falls and rots on the forest floor the next year new trees begin to grow in that spot what is that an example of

goldfiish [28.3K]

The cycle of life because the tree starts to grow back in that spot.

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4 years ago

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