Podcast
Questions and Answers
What is the kinetic energy of a 1,000 kg car moving at 20 m/s?
What is the kinetic energy of a 1,000 kg car moving at 20 m/s?
200,000 J
Calculate the gravitational potential energy of a 300 N rock climber standing 100 m from the base of a rock wall.
Calculate the gravitational potential energy of a 300 N rock climber standing 100 m from the base of a rock wall.
30,000 J
What is the power output of a stage manager raising a curtain by doing 5,976 J of work in 12 seconds?
What is the power output of a stage manager raising a curtain by doing 5,976 J of work in 12 seconds?
498 W
A light bulb is on for 12 seconds, using 1,200 J of energy. What is its wattage?
A light bulb is on for 12 seconds, using 1,200 J of energy. What is its wattage?
What is the work done when a 60 N force pushes a chair 5 m?
What is the work done when a 60 N force pushes a chair 5 m?
Use Ohm's Law to find the voltage if the current is 2 A and resistance is 12 Ω.
Use Ohm's Law to find the voltage if the current is 2 A and resistance is 12 Ω.
How much power is supplied by a 12 V car battery using 700 A?
How much power is supplied by a 12 V car battery using 700 A?
Calculate the density of a container filled with mercury if its mass is 4,810 g and volume is 355 mL.
Calculate the density of a container filled with mercury if its mass is 4,810 g and volume is 355 mL.
How much work is done pushing a car 20 m with a force of 300 N?
How much work is done pushing a car 20 m with a force of 300 N?
Calculate the energy content in Calories of a peanut that releases 8,368 J of energy.
Calculate the energy content in Calories of a peanut that releases 8,368 J of energy.
Determine the atomic mass of gallium, which is 60% Ga-69 and 40% Ga-71.
Determine the atomic mass of gallium, which is 60% Ga-69 and 40% Ga-71.
What is the potential energy of a book weighing 13 N at a height of 1.5 m?
What is the potential energy of a book weighing 13 N at a height of 1.5 m?
Find the resistance if a voltage of 300 V produces a current of 15 A.
Find the resistance if a voltage of 300 V produces a current of 15 A.
What is the kinetic energy of a 2 kg object moving at 3 m/s?
What is the kinetic energy of a 2 kg object moving at 3 m/s?
A 500 W heater is used for 2 hours. How much energy is consumed?
A 500 W heater is used for 2 hours. How much energy is consumed?
How much charge flows if a 2 A current runs for 10 seconds?
How much charge flows if a 2 A current runs for 10 seconds?
Calculate the acceleration if a force of 10 N is applied to a 2 kg mass.
Calculate the acceleration if a force of 10 N is applied to a 2 kg mass.
A car increases velocity from 10 m/s to 30 m/s in 5 seconds. What is its acceleration?
A car increases velocity from 10 m/s to 30 m/s in 5 seconds. What is its acceleration?
Flashcards
Kinetic Energy
Kinetic Energy
Energy due to motion.
Gravitational Potential Energy
Gravitational Potential Energy
Energy due to an object's position or height.
Power
Power
The rate at which work is done, or energy is transferred.
Wattage
Wattage
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Work
Work
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Ohm's Law
Ohm's Law
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Calories (Energy)
Calories (Energy)
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Atomic Mass
Atomic Mass
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Resistance
Resistance
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Current
Current
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Charge
Charge
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Acceleration
Acceleration
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Mass
Mass
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Volume
Volume
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Weight
Weight
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Volume
Volume
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Force
Force
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Density
Density
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Energy
Energy
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Power
Power
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Study Notes
- Calculations and examples are provided for various physics and chemistry concepts
Kinetic Energy
- Kinetic Energy equals (1/2) * mass * velocity squared
- The kinetic energy of a 1,000 kg car moving at 20 m/s is 200,000 J
- Kinetic energy of a 2 kg object moving at 3 m/s is 9 J
Gravitational Potential Energy
- Gravitational Potential Energy equals weight multiplied by height
- The gravitational potential energy of a 300 N rock climber standing 100 m from a rock wall is 30,000 J
- The potential energy of a book weighing 13 N at a height of 1.5 m is 19.5 J
Power
- Power equals Work divided by Time, or Voltage multiplied by Current
- The power output of a stage manager raising a curtain by doing 5,976 J of work in 12 seconds is 498 W
- A light bulb is on for 12 seconds, using 1,200 J of energy; its wattage is 100 W
- A 12 V car battery using 700 A supplies 8,400 W of power
Work
- Work equals Force multiplied by Distance
- The work done when a 60 N force pushes a chair 5 m is 300 J
- The work done pushing a car 20 m with a force of 300 N is 6,000 J
Ohm's Law
- Voltage equals Current multiplied by Resistance
- The voltage, if the current is 2 A and resistance is 12 Ω, is 24 V
- Resistance equals Voltage divided by Current
- Resistance if a voltage of 300 V produces a current of 15 A, is 20 Ohms
Density
- Density equals Mass divided by Volume
- The density of a container filled with mercury, with a mass of 4,810 g and a volume of 355 mL, is 13.55 g/mL
Energy Conversion
- Energy in Calories equals Energy in Joules divided by 4,184 J
- The energy content of a peanut that releases 8,368 J of energy is 2 Calories
Atomic Mass
- Calculated by summing the weighted average of each isotope
- The atomic mass of gallium, which is 60% Ga-69 and 40% Ga-71, is 69.8
Energy Consumption
- Energy equals Power multiplied by Time
- A 500 W heater used for 2 hours consumes 3,600,000 J of energy
Charge
- Measured in Coulombs, equals Current multiplied by Time
- The charge that flows if a 2 A current runs for 10 seconds is 20 C
Acceleration
- Acceleration equals Force divided by Mass, or (Final Velocity - Initial Velocity) divided by Time
- The acceleration when a force of 10 N is applied to a 2 kg mass is 5 m/s²
- When a car increases velocity from 10 m/s to 30 m/s in 5 seconds, its acceleration is 4 m/s²
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Description
Explore calculations involving kinetic energy, gravitational potential energy, power, and work. Examples are provided for each concept, illustrating the relationships between mass, velocity, height, force, distance, time, voltage and current.
