Podcast
Questions and Answers
What is pressure?
What is pressure?
- A measure of the weight of an object
- A force pulling on a surface
- A substance that can easily flow
- A force pushing on a surface (correct)
What are some examples of pressure?
What are some examples of pressure?
- Holding an object in hand
- Leaning against a wall (correct)
- Sitting on a chair
- Walking on the ground
Why does the woman wearing snow shoes stay on top of the snow while the two girls sink into the snow?
Why does the woman wearing snow shoes stay on top of the snow while the two girls sink into the snow?
- The woman's weight is less than the two girls
- The snow is less dense where the woman is standing
- The woman's snow shoes have a larger area distributing her weight (correct)
- The woman is exerting less force on the snow
What is the unit for pressure?
What is the unit for pressure?
In fluids, how do molecules exert pressure against the surfaces they touch?
In fluids, how do molecules exert pressure against the surfaces they touch?
How is pressure calculated?
How is pressure calculated?
What is fluid pressure?
What is fluid pressure?
What is the average air pressure at sea level?
What is the average air pressure at sea level?
Why doesn't the pressure of the air around you crush you?
Why doesn't the pressure of the air around you crush you?
What happens when you drive up the side of a mountain and your ears 'pop'?
What happens when you drive up the side of a mountain and your ears 'pop'?
Why does water pressure increase as depth increases?
Why does water pressure increase as depth increases?
What are some parts of your body that contain air?
What are some parts of your body that contain air?
Why does air exert pressure?
Why does air exert pressure?
What is the force that produces average air pressure at sea level?
What is the force that produces average air pressure at sea level?
What causes your ears to 'pop' when you swim down to the bottom of a deep pool or lake?
What causes your ears to 'pop' when you swim down to the bottom of a deep pool or lake?
What balances the pressure of the air outside your body?
What balances the pressure of the air outside your body?
What is the speed of light in space?
What is the speed of light in space?
What size range do light waves fall into?
What size range do light waves fall into?
What is the classification of objects that do not allow light to pass through?
What is the classification of objects that do not allow light to pass through?
What classification allows some light to go through, but not clearly?
What classification allows some light to go through, but not clearly?
What term is used for white light made up of all the colors of the rainbow?
What term is used for white light made up of all the colors of the rainbow?
What happens when light strikes an object and it bounces off, mainly as heat?
What happens when light strikes an object and it bounces off, mainly as heat?
What causes an object to appear a certain color?
What causes an object to appear a certain color?
Which color does a black object reflect?
Which color does a black object reflect?
What does a white object do to light?
What does a white object do to light?
How does the subtractive color system create color?
How does the subtractive color system create color?
What is the primary purpose of lenses?
What is the primary purpose of lenses?
What is the additive color system based on?
What is the additive color system based on?
What is the purpose of a polarizing filter?
What is the purpose of a polarizing filter?
What type of reflection occurs when an object surface is smooth and you see an image?
What type of reflection occurs when an object surface is smooth and you see an image?
What happens to light as it goes from space to air, and then to water or glass?
What happens to light as it goes from space to air, and then to water or glass?
Which combination of primary colors of light produces white light?
Which combination of primary colors of light produces white light?
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