3 years ago

How are problems best solved by scientists?

Physics

2 answers:

spin [16.1K]3 years ago

3 0

One scientist proposes an idea and other scientists repeat his or her experiments so they can Accept the Idea.

jekas [21]3 years ago

3 0

Usually Ask for Help or Solve it themselves by using Hypotheses .⇵

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A mechanic test driving a car that she has just given a tune-up accelerates from rest to 50.0 m/s in 9.8 s. How far (in meters)

Stels [109]

Answer:

245 m

Explanation:

v = at + v₀

50.0 m/s = a (9.8 s) + 0 m/s

a = 5.10 m/s²

x = x₀ + v₀ t + ½ at²

x = 0 m + (0 m/s) (9.8 s) + ½ (5.10 m/s²) (9.8 s)²

x = 245 m

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4 years ago

Betty (mass 40 kg), standing on slippery ice, catches her leaping dog (mass 15 kg) moving horizontally at 3.0 m/s. Show that the

MA_775_DIABLO [31]

Answer:

v = 2.18m/s

Explanation:

In order to calculate the speed of Betty and her dog you take into account the law of momentum conservation. The total momentum before Betty catches her dog must be equal to the total momentum after.

Then you have:

$Mv_{1o}+mv_{2o}=(M+m)v$ (1)

M: mass Betty = 40kg

m: mass of the dog = 15kg

v1o: initial speed of Betty = 3.0m/s

v2o: initial speed of the dog = 0 m/s

v: speed of both Betty and her dog = ?

You solve the equation (1) for v:

$v=\frac{Mv_{1o}+mv_{2o}}{M+m}=\frac{(40kg)(3.0m/s)+(15kg)(0m/s)}{40kg+15kg}\\\\v=2.18m/s$

The speed fo both Betty and her dog is 2.18m/s

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3 years ago

The one invention that has made many complex machines possible is the invention of the:

Dafna11 [192]

Hello!

We can point to the invention of the wheel . The wheel invention made possible the production of hundreds of complex machinery.

Hugs!!
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4 years ago

If you cut a apple and leave it in the open air and it turns brown what kind of chemical change is that

barxatty [35]

Answer:

Oxidation

Explanation:

The browning of the apple after you cut it undergoes a natural chemical change called oxidation, wherein the apple's enzymes react with the oxygen in the environment.

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3 years ago

WILL UPVOTE EVERY ANSWER! MULTIPLE CHOICE QUESTION!

Nitella [24]

B hardness

Giddy UP!!!!!

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3 years ago