PHYSICS HIGH SCHOOL

When the temperature of water increases from room temperature to 90ºC the process of heating the water is... Question 9 options: A. adiabatic
B. exothermic
C. isothermic
D. endothermic
E. all of the above

Answers

Answer 1
Answer:

Answer : The correct option is, (D) Endothermic

Explanation :

Adiabatic : It is a process in which a heat is constant. That means no heat is lost or gained by the system.

Isothermic : It is a process in which a temperature is constant.

Exothermic : It is a process in which heat released from system to surrounding. In this process, surrounding temperature increases and system temperature decreases.

Endothermic : It is a process in which heat required from the surrounding. In this process, surrounding temperature decreases and system temperature increases.

When the temperature of water increases from room temperature to 90ºC the process of heating the water is endothermic.

Hence, the correct option is, (D) Endothermic

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A conducting coil of 1850 turns is connected to a galvanometer, and the total resistance of the circuit is 30 Ω. The area of each turn is 4.00 × 10-4 m2. This coil is moved from a region where the magnetic field is zero into a region where it is nonzero, the normal to the coil being kept parallel to the magnetic field. The amount of charge that is induced to flow around the circuit is measured to be 8.0 × 10-3 C. Find the magnitude of the magnetic field.

Two 100 kg bumper cars are moving toward each other in opposite directions. Car A is moving at 8 m/s and Car B at –10 m/s when they collide head–on. If the resulting velocity of Car B after the collision is 8 m/s, what is the velocity of Car A after the collision?(I saw this question was asked previously, but the person did not provide the correct answer...)

Answers

Answer:

v_a = -10 m/s

so car A will move with speed 10 m/s in opposite direction

Explanation:

As we know that when two cars collide then the momentum of two cars will remains conserved

so here we have

P_i = P_f

mass of two cars = 100 kg

speed of car A = 8 m/s

speed of car B = - 10 m/s

after collision the speed of car B = +8 m/s

now by momentum conservation equation

m_1v_(1i) + m_2v_(2i) = m_1v_(1f) + m_2v_(2f)

so we have

100(8) + 100(-10) = 100(v_a) + 100(8)

so we have

v_a = -10 m/s

so car A will move with speed 10 m/s in opposite direction

What are the four forms that water takes when it returns to earth from the clouds?

Answers

Precipitation from the sky to the earth can come in several forms. Four types are:1) Rain2) Snow3) Sleet (think of a more liquidity slushy snow)4) Hail (pretty much solid chunks of ice)

Current can also be calleda. voltage.
b. electricity.
c. moving charges.
d.
b. and
c.

Answers

Electrical current is the flow of moving charges.
D. It is electricity and moving charges

Explain the difference between the following three substances: carbon c. , carbon dioxide (CO2), and oxygen (O2)

Answers

Carbon and oxygen are diatomic atoms. Carbon is made up of two elements.

Answer:

Carbon and oxygen are diatomic atoms. Carbon is made up of two elements.

Explanation:

Currently, Earth's tilt is closest to _____.A. 0°
B. 14.5°
C. 23.5°
D. none of these because, Earth's tilt changes dramatically with each orbit

Answers

The answer is C. 23.5°. It's because of this tilt that the Earth experiences seasons as it orbits around the Sun. Imagine the Sun is at the center of a spinning record.

Opposite electric charges will repel, and like charges will attract.

Answers

As it stands now, that statement is false.

There are two ways to make the statement true:

#1).  Exchange the places of the words "Opposite" and "like".

#2).  Exchange the places of the words "repel" and "attract".

Either ONE of these changes will make the statement true.
Doing BOTH of these changes will leave it false.

Answer:

False. Opposite electric charges will attract, and like charges will repel.
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