SYSAK Temperature and Heat A&I (GCHSS)

Choose ALL the basic quantities:

• Electric current

• Speed

• Energy

• Temperature

• Amount of substance

Answer explanation

There are six basic quantities recognized in physics: mass, length, time, temperature, electric current, and amount of substance.

The other options include derived quantities

Choose all the basic quantities:

• Mass

• Time

• Length

• Force

• Area

Answer explanation

There are six basic quantities recognized in physics: mass, length, time, temperature, electric current, and amount of substance.

The other options include derived quantities

Which of the following is NOT a method of heat transfer?

• Radiation

• Convection

• Absorption

• Conduction

Answer explanation

Absorption is not a method of heat transfer; it refers to the process of taking in energy. The correct methods of heat transfer are radiation, convection, and conduction.

• Work done in mechanical energy transfer

• Work done in chemical energy transfer

• Work done in electrical energy transfer

• Work done in thermal energy transfer

Answer explanation

The equation W=VIt represents the work done in electrical energy transfer, where W is work, V is voltage, I is current, and t is time. This formula quantifies energy transferred in electrical circuits.

What does PE stand for in physics?

• Pressure Energy

• Physical Energy

• Pulsed Energy

• Potential Energy

Answer explanation

In physics, PE commonly stands for Potential Energy, which is the energy stored in an object due to its position or configuration.

The other terms are invented and non-sensical.

• Voltage equals resistance divided by current

• Voltage equals current divided by resistance

• Voltage equals current plus resistance

• Voltage equals current times resistance

Answer explanation

The equation V=IR represents Ohm's Law, where V is voltage, I is current, and R is resistance. It shows that voltage equals current times resistance, making the correct choice 'Voltage equals current times resistance'.

Mark all correct statements about energy,

• Energy can be transferred

• Energy is conserved

• Energy can change form

• Energy can be created and destroyed

Answer explanation

Energy can be transferred, conserved, and change form, reflecting the principles of thermodynamics. However, energy cannot be created or destroyed, as stated in the law of conservation of energy.

• Work done equals power times periodic time

• Wavelength equals potential times time

• Wattage equals pressure times temperature

• Work done equals power times time

Answer explanation

The equation W=Pt indicates that work done (W) is equal to power (P) multiplied by time (t). Therefore, the correct interpretation is 'Work done equals power times time', making this the right choice.

Which of the following is a form of energy?

• Thermal Mass

• Potential Force

• Static Energy

• Kinetic Energy

Answer explanation

Kinetic energy is the energy associated with the motion of an object.

Thermal mass is a term related to the capacity to store heat.

Potential force and Static energy are not a valid scientific term. They don't make any sense.

What is the relationship between power (P), current (I), and voltage (V)?

Answer explanation

The correct relationship between power (P), current (I), and voltage (V) is given by the formula P=IV. This means power is the product of current and voltage, which is fundamental in electrical circuits.