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Gekata [30.6K]
3 years ago
12

Which statement describes the relationship between gravitational force and strong nuclear force? (2 points) Select one: a. Stron

g nuclear force is the stronger force; it is related to weight. b. Gravity is the weaker force; it is related to mass. c. Strong nuclear force is the weaker force; it is related to size. d. Gravity is the stronger force; it is not related to weight.
Physics
2 answers:
Tamiku [17]3 years ago
6 0

Answer:

b. Gravity is the weaker force; it is related to mass.

Explanation:

Gravity is the force of gravitational attraction of earth on all objects near its surface

This force on all objects depends on the mass of the objects

This force is given by

F = \frac{GMm}{r^2}

F = mg

so here it is a weak force as it depends on mass and acceleration due to gravity while strong nuclear force is independent of mass and it only depends on the distance between the nuclei.

So as we will change the distance between the nuclei the force between them will change

So here correct answer is

b. Gravity is the weaker force; it is related to mass.

White raven [17]3 years ago
6 0

Answer:

d

Explanation:

because I am in college

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Between a plate and the body of a bolt, the projected area is equal to the product of the bolt _______ and the plate _______.
Elan Coil [88]

Answer:

Projected area= Diameter of the bolt* thickness.

Explanation:

Between a plate and the body of a bolt, the projected area is equal to the product of the bolt _Diameter of the bolt______ and the plate ___thickness____.

Projected area= Diameter of the bolt* thickness.

Projected area is a 2-dimensional area measurement of a 3-dimensional body by projecting its surface on an arbitrary plane

8 0
3 years ago
A river flows with a speed of 0.600 m/s. A student first swims upriver 0.500 km, then turns around and returns to his starting p
DerKrebs [107]

Answer:

a) 1111.0 seconds

b) 833.3 s

c) Because of proportions

Explanation:

a) Total time of round trip is the sum of time upriver and time downriver

t_{total}=t_{up}+t_{down}

Time upriver is calculated with the net speed of student and 0.500 km:

t_{up}=\frac{d_{istance}}{|v_{swimmer}|} ;\\v_{swimmer}=v_{relative to river}+v_{river}=-1.2+0.6=-0.6 m/s\\t_{up}=\frac{500 m}{0.6 m/s}=833.3 s

(Becareful with units 0.5 km= 500m) Similarly of downriver:

t_{down}=\frac{d_{istance}}{|v_{swimmer}|} ;\\v_{swimmer}=1.2+0.6=1.8 m/s\\t_{down}=\frac{500 m}{1.8 m/s}=277.7 s

So the sum is:

t_{total}=1111.0s

b) Still water does not affect student speed, so total time would be simply:

t_{total}=\frac{1000 m}{1.2 m/s}=833.3 s

c) For the upriver trip, student moved half the distance in half speed of the calculation in b), so it kept the same ratio and therefore, same time. So the aditional time is actually the downriver.  

6 0
3 years ago
Which of these boxes will not accelerate? A. B. C. D.
serg [7]

Answer: The correct answer is Image B.

Explanation: For an object to accelerate, there should be unbalanced forces present. An object will move in the direction of net force.

Balanced forces are defined as the forces acting on the same object which are equal in magnitude but act in opposite direction. The net forces are 0.

Unbalanced forces are defined as the forces acting on the same object which are unequal in magnitude. The net force is non-zero.

For the given images:

Image A: This box will accelerate easily because the net force is non-zero and is moving in right direction.

Image B: This box will not accelerate because the net force is zero as all the forces are balancing one another. Hence, the object will stay at rest.

Image C: This box will accelerate easily because the net force is non-zero and  is acting in between the normal and applied force.

Image D: This box will accelerate easily because the net force is non-zero and is moving in right direction.

Hence, the correct option is Image B.

7 0
3 years ago
Read 2 more answers
Question 10(Multiple Choice Worth 7 points)
nataly862011 [7]

Organisms that existed over a limited period

Explanation:

Index fossils are organisms that existed within a limited period in the geologic record.

These fossils are indicator fossils that serves as guide to define the relative ages of rocks in a sequence.

Here are some characteristics of index fossils:

  • they must have existed over a limited period in their history.
  • they must be very distinctive with short evolutionary tend.
  • they must be abundant and highly widespread in the stratigraphic column.

Learn more:

Fossils brainly.com/question/7382392

#learnwithBrainly

5 0
3 years ago
A bungee jumper feels weightless as she falls toward the earth.what accounts for her weightless feeling when she fall freely?1.
Ann [662]

The feel of weight comes due to the normal reaction force given by the support. Hence, the condition of weightlessness is when the normal reaction force becomes zero. So, during free fall there is no support which can provide the normal reaction. Hence, the bungee jumper feels weightless as she falls towards the earth because of the lack of support force that balances gravity.

Hence, the answer is 3.

8 0
3 years ago
Read 2 more answers
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