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liq [111]
3 years ago
14

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

Physics
2 answers:
FinnZ [79.3K]3 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]3 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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That it will erupt upon contact. Hope it helps!
6 0
3 years ago
The atoms in a sidewalk on a hot summer day are vibrating _____ the atoms in the sidewalk on a freezing day in winter.
Karolina [17]

Answer:

(A) more rapidly than

Explanation:

With higher temperatures, object's molecules (and atoms) have higher kinetic energy which is due to faster "jiggling" (vibrations). On a hot day these vibrations in the material the sidewalk is made of are more rapid than on a cold day, just as their temperatures differ.

7 0
3 years ago
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A box of Thanksgiving presents slides across a waxy floor at 20m/s. It comes to a stop in 4 seconds. What distance did the box t
mars1129 [50]

Answer:

V = d/t = 20

20=d/4 so d = 80

6 0
3 years ago
What would the final temperature be if 8.94 X 10 3 joules of heat were added to 454 grams of copper at 23.0 o C?
ozzi

Answer: 74.1^0C

Explanation:

The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.

Q=m\times c\times \Delta T

Q = Heat absorbed=8.94\times 10^3 Joules

m= mass of copper = 454 g

c = specific heat capacity = 0.385J/g^0C

Initial temperature of the copper = T_i = 23.0°C

Final temperature of the water = T_f  = ?

Change in temperature ,\Delta T=T_f-T_i

Putting in the values, we get:

8.94\times 10^3=454\times 0.385\times (T_f-23.0)^0C

T_f=74.1^0C

The final temperature of copper will be 74.1^0C

8 0
3 years ago
There is a current I flowing in a clockwise direction in a square loop of wire that is in the plane of the paper. If the magneti
nevsk [136]

Answer:

Explanation:

The magnetic moment of the coil  M = current x area of loop

= I x L x L

M = L² I .

Magnetic field = B

Torque = M x B

= MB sinθ where θ is angle between M and B . Direction of M is perpendicular to face of loop

Torque  = MB sin90

= MB

=  L² I B .

3 0
3 years ago
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