PHYSICS HIGH SCHOOL

Which change will always result in an increase in the gravitational force between two objects?

Answers

Answer 1
Answer:

The gravitational force of two objects, by definition, is given by:

Where,

G: gravitational constant

m1: mass of object number 1.

m2: mass of object number 2.

d: distance between both objects.

Therefore, according to the given equation, a change that always results in an increase in gravitational force is:

Increase in the mass of the objects and decrease in the distance between them.

Answer:

A change that will always result in an increase in the gravitational force between two objects is:

Increase in the mass of the objects and decrease in the distance between them.
Answer 2
Answer: The change that will always result in an increase in the gravitational force between two objects is increasing the masses of the objects and decreasing the distance between the objects

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If you rub your hands together, does the entropy of the universe increas, decrease, or stay the same

Answers

Answer:

When you rub your hands together, the entropy of the universe increases. This increase in entropy is a result of the second law of thermodynamics, which states that in any energy transfer or transformation, the total entropy of an isolated system will always increase over time.

In this case, when you rub your hands together, you are converting some of the ordered kinetic energy of your hand motion into thermal energy (heat) due to friction. This process increases the randomness and disorder of the particles involved, including the molecules in your skin and the surrounding air. As a result, the overall entropy of the system, which includes your hands, the air, and everything else involved, increases.

So, the act of rubbing your hands together leads to an increase in entropy in the universe, consistent with the second law of thermodynamics.

Explanation:

Analyze how heat transfer occurs during the processes of conduction and convection.

Answers

During conduction, two substances are in direct contact with one another. When the molecules begin to gain more energy, they move around more and as they bump into one another, energy gets transferred. 
During convection, a continuous current (convection current) transfers heat energy through a liquid/gas. The heat rises, and meets cooler areas. 
Hope that helped you.

A train leaves the station at the 0.0m marker traveling with a constant velocity of 45.0 m/s. How manyseconds later will the train pass the 1500.Om marker? What is the velocity of the train in km/h?

Answers

The train will pass the 1500.0m marker 33.33 seconds after leaving the station. Its velocity is 162.0 km/h.

How to evaluate time the train will pass the 1500.0m marker and it's velocity

To find the time it takes for the train to pass the 1500.0m marker, we can use the formula: time = distance / velocity. Plugging in the values,

time = 1500.0m / 45.0 m/s

time = 33.33 seconds.

To convert the velocity from m/s to km/h, we use the conversion factor: 1 m/s = 3.6 km/h. Therefore,

velocity = 45.0 m/s * 3.6 km/h/m/s

velocity = 162.0 km/h.

In summary, the train will pass the 1500.0m marker approximately 33.33 seconds after departing the station, and its velocity will be 162.0 km/h

Read more about velocity here: here:brainly.com/question/80295

#SPJ3

Answer:

119.88 km/h

Explanation:

1500/45=33.3

use a m/s to km/h calculator

put in 33.3 for m/s and you will get 119.88 km/h.

119.88 km/h.

A series circuit has a lamp, a battery, an ammeter and a switch. What would the ammeter read

Answers

When the switch is open, the ammeter reads zero. When the switch is closed, the meter reads a number that's (battery voltage) divided by (resistance of the lamp), and the lamp glows.
the ammeter would read the current flowing in the circuit

When two objects collide, they experience the exact same amount of force in opposite directions.O True
O False

Answers

Answer:

True

Explanation:

In a collision between two objects, both objects experience forces that are equal in magnitude and opposite in direction. Such forces often cause one object to speed up (gain momentum) and the other object to slow down (lose momentum).
true because they experience the force from the other object, and the other experiences its force.

In a parallel circuit with 3 resistors, the output voltage at the power supply is recorded to be 5 A.   The current flowing through the first resistor is 1 A and the current flowing through the second resistor is .5 A. What is the current flowing through the third resistor?

Answers

In a parallel circuit, the total power supply current is the sum of the
currents through all of the individual branches.

The output current (not the voltage) of the power supply is 5 A.
So the individual currents in the circuit branches is 5 A.

The current through the first 2 resistors is (1 + 0.5) = 1.5 A.

So the current through the 3rd resistor is (5 - 1.5) = 3.5 A.
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