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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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A circuit has a resistance of 10 Ω and current of 5 A. What is the voltage?<br><br>​
raketka [301]

Answer: 50 V

Explanation:

V=IR\\V=(5)(10)\\V=50

6 0
3 years ago
To give an idea of sensitivity of the platypus's electric sense, how far from a 80nC n C point charge does the field have this m
SVETLANKA909090 [29]

The question is incomplete. The complete question is :

A platypus foraging for prey can detect an electric field as small as 0.002 N/C.

-To give an idea of sensitivity of the platypus's electric sense, how far from a +80nC point charge does the field have this magnitude?

Solution :

Given electric field,  E = 0.002 N/C

Charge, Q = + 80 nC

$\therefore E = \frac{kQ}{R^2} $

or $R^2=\frac{kQ}{E}$

    $R^2=\frac{9\times 10^9 \times 80 \times 10^{-9}}{0.002}$

   R = 600 m

This is the distance of the charge from the point of observations.

5 0
3 years ago
If the mass of the spacecraft were doubled, how much would the force of gravity would change?
vodka [1.7K]
F=mg
if m doubled, F would double as well

5 0
3 years ago
Why does a force perpendicular to an objects velocity change the direction of the velocity but not its magnitude
inna [77]

Answer:

According to your question although I think an object undergoing uniform circular motion is moving with a constant speed. Nevertheless, it is accelerating due to its change in direction. The direction of the acceleration is inwards,therefore a force perpendicular to an objects velocity change the direction of the velocity but not its magnitude.

3 0
3 years ago
What is he total resistance?<br> A. 20 ohms<br> B. 90 ohms<br> C. 40 ohms<br> D. 30 ohms
ehidna [41]
Imma guess A! Idk if it’s 100% correct tho so I’d check that!
6 0
3 years ago
Read 2 more answers
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