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katrin [286]
3 years ago
14

Which of the following statements are true? Positively charged objects attract other positively charged objects. Negatively char

ged objects attract other negatively charged objects. Positively charged objects attract negatively charged objects. Positively charged objects attract neutral objects. Negatively charged objects attract neutral objects.
Physics
2 answers:
butalik [34]3 years ago
7 0
The statement that is true is that positively charged objects attract negatively charged objects. This is due to a law that states 'like forces attract while unlike forces repel. This same concept applies to magnetism. If you put two similar poles together, for example; if you place two south poles together. You feel a separating force between the two poles. But if you place two opposite poles together they attract each other. Hope i helped. <span />
olasank [31]3 years ago
6 0

Answer:

Positively charged objects attract negatively charged objects

Explanation:

According to fundamental statement about static charges “Like charges repel each other, unlike charges attract each other”. The force between these static charges is called as electric force. Only third option fulfill this criteria. Other options do not satisfy this fundamental statement. Hence, positively charged objects attract negatively charged objects.

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The kinetic energy of the ball and the potential energy of the ball/Earth system were measured and organized in the spreadsheet
marin [14]

Based on the data provided, the thermal energies at the given time intervals are as follows:

  • At time t = 0.0 secs; thermal energy = 0.0 J
  • At time, t = 0.8 secs; thermal energy = 0.0 J
  • At time, t = 2.0 secs; thermal energy = 3.9 J
  • At time, t = 2.8 secs; thermal energy = 6.7 J

<h3>What is the law of conservation of energy?</h3>

The law of conservation of energy states that the total energy in an isolated system is conserved.

For a ball undergoing energy conversion between kinetic and potential energy, the sum of the energy remains constant.

Any reduction in total energy is due to conversion of some energy to thermal energy.

  • Sum of energy: Kinetic + potential + thermal = 15.2 J
  • Thermal energy = 15.2 - (PE + KE)

At time t = 0.0 secs

Thermal energy = 15.2 - (15.2 + 0.0)

Thermal energy = 0.0 J

At time, t = 0.8 secs

Thermal energy = 15.2 - (4.7 + 10.5)

Thermal energy = 0.0 J

At time, t = 2.0 secs

Thermal energy = 15.2 - (7.4 + 3.9)

Thermal energy = 3.9 J

At time, t = 2.8 secs

Thermal energy = 15.2 - (8.5 + 0.0)

Thermal energy = 6.7 J

Therefore, the thermal energies at the given time intervals are as follows:

  • At time t = 0.0 secs; thermal energy = 0.0 J
  • At time, t = 0.8 secs; thermal energy = 0.0 J
  • At time, t = 2.0 secs; thermal energy = 3.9 J
  • At time, t = 2.8 secs; thermal energy = 6.7 J

Learn more about conservation of energy at: brainly.com/question/166559

8 0
2 years ago
A car is traveling at 7.0 m/s when the driver applies the brakes. The car moves 1.5 m before it comes to a complete stop. If the
viva [34]

Answer:

d. 6.0 m

Explanation:

Given;

initial velocity of the car, u = 7.0 m/s

distance traveled by the car, d = 1.5 m

Assuming the car to be decelerating at a constant rate when the brakes were applied;

v² = u² + 2(-a)s

v² = u² - 2as

where;

v is the final velocity of the car when it stops

0 = u² - 2as

2as = u²

a = u² / 2s

a = (7)² / (2 x 1.5)

a = 16.333 m/s

When the velocity is 14 m/s

v² = u² - 2as

0 = u² - 2as

2as = u²

s = u² / 2a

s = (14)² / (2 x 16.333)

s = 6.0 m

Therefore, If the car had been moving at 14 m/s, it would have traveled 6.0 m before stopping.

The correct option is d

4 0
3 years ago
A compact car, mass 664 kg, is moving at 19 km/h toward the east. What is the car's momentum in kg x m/s?
Natasha2012 [34]

Answer:

3504.4 kgm/s

Explanation:

First, convert km/hr to m/s:

19 km/hr x 1000m/1km x 1/60min x 1/60s = 5.28 m/s

p = mv

p = (664 kg)(5.28 m/s) = 3504.4 kgm/s

6 0
3 years ago
A hot-air balloon with a mass of 400 kilograms moves across the sky with 3,200 joules of kinetic energy. The velocity of the bal
kotegsom [21]

Answer:

4 m/s

Explanation:

KE =

Velocity of balloon will be 4 m/s.

!! Hope It Helps !!

4 0
3 years ago
a boy standing by a lake sees a fish in the pond and tries to thrust a spear into it he will success or not​
almond37 [142]

Answer:

yes

Explanation:

8 0
3 years ago
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