Question 1

What pressure, in PSI pounds per square inch, is a scuba diver subjected when he / she descends to an ocean depth of 125 feet?

Accepted Answer

At sea level, the atmospheric pressure is approximately 14.7 psi. For every 33 feet of seawater, the pressure increases by about 14.7 psi. At 125 feet, the calculation is as follows: (125 / 33) * 14.7 + 14.7 (atmospheric pressure at sea level) = 54.12 psi.

Question 2

Causes matter to change and does not have the properties of matter.

Accepted Answer

Energy causes matter to change its state or motion and does not possess mass, volume, or any other properties of matter. Inertia, gravity, and density are properties or effects related to matter itself.

Question 3

Calculate the amount of work accomplished by a three foot table holding up a two pound book.

Accepted Answer

Work is calculated as force times distance. However, in this scenario, the table holding up a book is not moving the book through a distance in the direction of the force (gravity), so no work is being done in the physics sense. The options provided and the premise of the question seem to misunderstand the concept of work as defined in physics. The correct understanding is that no work is done by the table on the book in the context of physics principles. However, if we were to mistakenly apply the formula for work (work = force x distance) with an incorrect interpretation that holding up an object constitutes work, and misinterpreting the given options as attempting to apply this formula, one might incorrectly choose an option based on multiplying the weight of the book by the height of the table. But, since none of the explanations or calculations align with the fundamental physics principles of work, the provided answer choice and explanation highlight a misunderstanding.

Question 4

A principle used to explain a bodies ability to resist motion.

Accepted Answer

Inertia is the principle that explains a body's ability to resist changes in its state of motion. It is a property of matter that keeps an object at rest or in uniform motion in a straight line unless acted upon by an external force.

Question 5

Calculate the amount of work accomplished when a weight is lifted 240 ft by a force of 600 lbs.

Accepted Answer

Work = force x distance = 600 lbs x 240 ft = 144,000 ft-lb.

Question 6

Stored energy

Accepted Answer

Stored energy is referred to as potential energy, which is the energy held by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors.

Question 7

A cylinder 4 cm in diameter and 40 cm long is made of brass. (Density = 8.5 g/cm3) Calculate its weight. Show your work! (V= $\pi$r²h) W = DV

Accepted Answer

First, calculate the volume (V) of the cylinder using the formula V = πr^2h, where r is the radius (half of the diameter, so 2 cm) and h is the height (40 cm). V = π(2^2)(40) = 3.14 * 4 * 40 = 502.4 cm^3. Then, calculate the weight (W) using the formula W = DV, where D is the density (8.5 g/cm^3) and V is the volume we just calculated. W = 8.5 * 502.4 = 4270.4 grams.

Question 8

What current in amps, will flow through a conductor with a resistance of 20 ohms if the potential difference is 120 volts? 	 $\quad $I = V ÷ R

Accepted Answer

Using Ohm's Law, I = V ÷ R, where I is the current in amps, V is the potential difference in volts, and R is the resistance in ohms. Substituting the given values, I = 120 volts ÷ 20 ohms = 6 amps.

Question 9

An electric motor on a centrifugal pump has a total resistance of 6 ohms. If the motor uses 21 amps of current, what voltage does the motor need?
I = V ÷ ÷ R $\quad $ or  $\quad $V = IR

Accepted Answer

Using the formula V = IR, where I = 21 amps and R = 6 ohms, the voltage V = 21 amps * 6 ohms = 126 volts.

Question 10

Steam enters a turbine at 412ºF at atmospheric pressure. Six hundred pound steam flows through the turbine each hour during normal operation. Formula:	Rh = Ws X c X ∆T
Rh = ?
Ws = 600 lbs/hr
c = 0.48
Tin = 412ºF
Tout = 212ºF
∆T = ?

Accepted Answer

The answer of Steam enters a turbine at 412ºF at...

Question 11

On question 31, calculate the HP output.
Formula: HP = (Rh) heat rate X 0.000393
= _______ HP

Accepted Answer

The answer of On question 31, calculate the HP output.
Formula:...

Question 12

Identify the steam turbine's thermal efficiency.

Accepted Answer

The answer of Identify the steam turbine's thermal efficiency.
...

Question 13

Determine the Thermal Efficiency of the Heat Exchanger

Accepted Answer

The answer of Determine the Thermal Efficiency of the Heat...

Question 14

A balanced lever arm rests on a fulcrum at its center. A 600-lb force is applied 5 ft from the fulcrum. To maintain equilibrium, how far from the fulcrum, on the other lever arm, should a 1200-lb force be applied?
Solution:

Accepted Answer

The answer of A balanced lever arm rests on a...

Quiz 13: Applied Physics Two

What pressure, in PSI pounds per square inch, is a scuba diver subjected when he / she descends to an ocean depth of 125 feet?

Causes matter to change and does not have the properties of matter.

Calculate the amount of work accomplished by a three foot table holding up a two pound book.

A principle used to explain a bodies ability to resist motion.

Calculate the amount of work accomplished when a weight is lifted 240 ft by a force of 600 lbs.

Stored energy

A cylinder 4 cm in diameter and 40 cm long is made of brass. (Density = 8.5 g/cm3) Calculate its weight. Show your work! (V= $\pi$ r²h) W = DV

What current in amps, will flow through a conductor with a resistance of 20 ohms if the potential difference is 120 volts? $\quad$ I = V ÷ R

An electric motor on a centrifugal pump has a total resistance of 6 ohms. If the motor uses 21 amps of current, what voltage does the motor need? I = V ÷ ÷ R $\quad$ or $\quad$ V = IR

Steam enters a turbine at 412ºF at atmospheric pressure. Six hundred pound steam flows through the turbine each hour during normal operation. Formula: Rh = Ws X c X ∆T Rh = ? Ws = 600 lbs/hr c = 0.48 Tin = 412ºF Tout = 212ºF ∆T = ?

On question 31, calculate the HP output. Formula: HP = (Rh) heat rate X 0.000393 = _______ HP

Identify the steam turbine's thermal efficiency.

Determine the Thermal Efficiency of the Heat Exchanger

A balanced lever arm rests on a fulcrum at its center. A 600-lb force is applied 5 ft from the fulcrum. To maintain equilibrium, how far from the fulcrum, on the other lever arm, should a 1200-lb force be applied? Solution:

Quiz 13: Applied Physics Two

What pressure, in PSI pounds per square inch, is a scuba diver subjected when he / she descends to an ocean depth of 125 feet?

Causes matter to change and does not have the properties of matter.

Calculate the amount of work accomplished by a three foot table holding up a two pound book.

A principle used to explain a bodies ability to resist motion.

Calculate the amount of work accomplished when a weight is lifted 240 ft by a force of 600 lbs.

Stored energy

A cylinder 4 cm in diameter and 40 cm long is made of brass. (Density = 8.5 g/cm3) Calculate its weight. Show your work! (V= π\piπ r2h) W = DV

What current in amps, will flow through a conductor with a resistance of 20 ohms if the potential difference is 120 volts? \quad I = V ÷ R

An electric motor on a centrifugal pump has a total resistance of 6 ohms. If the motor uses 21 amps of current, what voltage does the motor need? I = V ÷ ÷ R \quad or \quad V = IR

Steam enters a turbine at 412ºF at atmospheric pressure. Six hundred pound steam flows through the turbine each hour during normal operation. Formula: Rh = Ws X c X ∆T Rh = ? Ws = 600 lbs/hr c = 0.48 Tin = 412ºF Tout = 212ºF ∆T = ?

On question 31, calculate the HP output. Formula: HP = (Rh) heat rate X 0.000393 = _______ HP

Identify the steam turbine's thermal efficiency.

Determine the Thermal Efficiency of the Heat Exchanger

A balanced lever arm rests on a fulcrum at its center. A 600-lb force is applied 5 ft from the fulcrum. To maintain equilibrium, how far from the fulcrum, on the other lever arm, should a 1200-lb force be applied? Solution:

A cylinder 4 cm in diameter and 40 cm long is made of brass. (Density = 8.5 g/cm3) Calculate its weight. Show your work! (V= $\pi$ r²h) W = DV

What current in amps, will flow through a conductor with a resistance of 20 ohms if the potential difference is 120 volts? $\quad$ I = V ÷ R

An electric motor on a centrifugal pump has a total resistance of 6 ohms. If the motor uses 21 amps of current, what voltage does the motor need? I = V ÷ ÷ R $\quad$ or $\quad$ V = IR