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liq [111]
4 years ago
14

Pablo wants to enter the science fair. Which question could be answered through scientific investigation?

Physics
2 answers:
FinnZ [79.3K]4 years ago
8 0
D.What is the best angle to throw a ball for maximum distance?  Because this is the only question in above all of them which has some scientific investigation like angle that is use in many of the physics relations.
Zinaida [17]4 years ago
3 0

The correct choice is

D.What is the best angle to throw a ball for maximum distance

A)  Incorrect . Since the which sport is fun varies person to person.

B) Incorrect. This question does not need a scientific investigation to be carried out to answer it. instead we can search the for the records of the pitcher of the last hundred years and then do a comparison.

C) Incorrect. This is more of general knowledge question

D) Correct.    we can carry out a scientific investigation by throwing a ball at same speed and various angles and check at which angle does the ball travel the maximum distance.

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1. Which word or phrase best describes entropy?
Mama L [17]
The answer to this question is:

D) Disorder
7 0
4 years ago
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When you are on a huge water slide what forces are there? when will you experience a net force?
Pani-rosa [81]
When you are on a huge water slide, the force present as you slide is the gravitational force. It is because the gravity enables you to slide down the water slide. The net force is the overall forces of the object, so as you slide the water slide, you may experience the net force once you slide down with the gravity and water sliding you down.
3 0
3 years ago
How many protons are in this atom if it has a balanced charge
Lerok [7]
It would be 20 protons left because 1-19= 20
7 0
3 years ago
It takes 130 J of work to compress a certain spring 0.10m. (a) What is the force constant of this spring? (b) To compress the sp
Ede4ka [16]

Explanation:

Given that,

Work done to stretch the spring, W = 130 J

Distance, x = 0.1 m

(a) We know that work done in stretching the spring is as follows :

W=\dfrac{1}{2}kx^2\\\\k=\dfrac{2W}{x^2}\\\\k=\dfrac{2\times 130}{(0.1)^2}\\\\k=26000\ N/m

(b) If additional distance is 0.1 m i.e. x = 0.1 + 0.1 = 0.2 m

So,

W=\dfrac{1}{2}kx^2\\\\W=\dfrac{1}{2}\times 26000\times 0.2^2\\\\W=520\ J

So, the new work is more than 130 J.

6 0
3 years ago
What is the mass of a large ship that has a momentum of 1.60×109kg·m/s, when the ship is moving at a speed of 48.0 km/h? (b) Com
erastova [34]

a) The mass of the ship is 1.2\cdot 10^8 kg

b) The ship has a larger momentum than the shell

Explanation:

a)

The momentum of an object is given by:

p=mv

where

m is the mass of the object

v is its velocity

For the ship in this problem, we have

p=1.60\cdot 10^9 kg m/s is the momentum

v=48.0 km/h \cdot \frac{1000 m/km}{3600 s/h}=13.3 m/s is the velocity

Solving for m, we find the mass of the ship:

m=\frac{p}{v}=\frac{1.60\cdot 10^9}{13.3}=1.2\cdot 10^8 kg

b)

The momentum of the artillery shell is given by

p=mv

where

m is its mass

v is its velocity

For the shell in this problem,

m = 1100 kg

v = 1200 m/s

Substituting,

p=(1100)(1200)=1.32\cdot 10^6 kg m/s

So, we see that the ship has a larger momentum.

Learn more about momentum:

brainly.com/question/7973509

brainly.com/question/6573742

brainly.com/question/2370982

brainly.com/question/9484203

#LearnwithBrainly

6 0
3 years ago
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