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Explain why the cardboard did not fall to the ground when the glass of water was tipped upside down?
The cardboard did not fall to the ground when the glass of water was tipped upside down because the air pressure on the top surface of the cardboard was greater than the water pressure holding it down. This created a force that pushed the cardboard against the glass and prevented it from falling.
Why do cardboard boxes get squashed by a shovel?
Cardboard boxes get easily squashed by a shovel due to the concentrated force applied by the shovel's edge when pressing down on the box. Cardboard is a relatively soft and easily deformable material, making it susceptible to getting crushed under pressure.
Why does water from an inverted glass not fall when it is covered with cardboard?
As soon as the card drops a little there is 1) a volume expansion that counteracts the displacement and 2) a thin water rim is formed between the edge of the cup and the card. If the weight of the card is low, a few grams , the surface tension of water is sufficient to prevent air from penetrating the cup. Therefore card is kept in place by the capillary force. With a card of somewhat greater weight the width of the capillary rim increases (but there is additional volume expansion to counteract the weight of the heavier card). Since the capillary force decreases with increasing width of the open edge, the weight range of cards is limited. Eventually it can no longer prevent air from rushing in. But with cards with low weights, thus a thin edge and as a consequence a high capillary force it works fine.
What makes a coaster placed over the rim of a glass of water stick even when you invert it?
The air pressure keeps the water from falling out of the glass. The atmospheric pressure i.e. the air pressure outside the glass is greater than the water pressure inside the glass so it holds the coaster onto the glass.
Is gauge pressure the same as absolute pressure?
No, gauge pressure is the pressure measured relative to atmospheric pressure, while absolute pressure is the total pressure including atmospheric pressure.
Which exerts more pressure on the ground a empty cardboard box or the same piece of cardboard after it has been flattened for recycling?
The empty cardboard box exerts more pressure on the ground because its weight is distributed over a smaller surface area compared to the same piece of cardboard that has been flattened. When flattened, the weight of the cardboard is spread out over a larger area, resulting in less pressure.
What will happen to a spineless animal if there's a little pressure on it?
Hey sexy it will get flatened and when the pressure is taken off it will pop back up. Bye babes
Explain why the cardboard did not fall to the ground when the glass of water was tipped upside down?
The cardboard did not fall to the ground when the glass of water was tipped upside down because the air pressure on the top surface of the cardboard was greater than the water pressure holding it down. This created a force that pushed the cardboard against the glass and prevented it from falling.
What is a low pressure refrigerant under EPA's refrigerant recycling regulations?
R22
What refrigerant is a low pressure refrigerant under EPA's refrigerant recycling regulations?
R22
Why do cardboard boxes get squashed by a shovel?
Cardboard boxes get easily squashed by a shovel due to the concentrated force applied by the shovel's edge when pressing down on the box. Cardboard is a relatively soft and easily deformable material, making it susceptible to getting crushed under pressure.
What refrigerant is considered a low-pressure refrigerant under EPA's refrigerant recycling regulations?
R22
What is the best way to cut thick cardboard using a cardboard cutter?
The best way to cut thick cardboard using a cardboard cutter is to first measure and mark the cutting line, then firmly hold the cardboard in place and carefully guide the cutter along the marked line using a straight edge as a guide. Be sure to apply even pressure and make multiple passes if needed to ensure a clean cut.
Which refrigerant is a low pressure refrigerant under epas refigerant recycling regulations?
Under EPA refrigerant recycling regulations, R-134a is classified as a low-pressure refrigerant. Other examples of low-pressure refrigerants include R-12 and R-22. These refrigerants are subject to specific recovery and recycling requirements to minimize environmental impact. Proper handling and disposal are crucial to comply with regulations and protect the ozone layer.
When we take a glass of half filled water and a small piece of cardboard on the top press then invert it.the cardbord remains attached with glass water doesn't falls.why is it so?
The air pressure in the air under the cardboard is pushing up, thus keeping the cardboard and water in the glass.
How do you test the strength of cardboard?
To test the strength of cardboard, you can conduct a compression test by applying pressure to the material until it deforms or breaks, measuring the force required. Alternatively, a bursting test can be performed by applying a controlled force to a specified area until the cardboard ruptures, allowing for the assessment of its bursting strength. Additionally, you can evaluate the cardboard's tensile strength by cutting strips and pulling them apart to determine the force at which they fail. Each method provides insight into different aspects of the cardboard's durability and structural integrity.
How should you pack bicycle wheels for mailing?
A flat cardboard box, lots of cardboard reinforcement around the edges to hopefully stop the rims from being hit. Several foam blocks in between the spokes to help it hold it's shape and not take any pressure onto the spokes. Foam over the axles to stop them piercing through the cardboard.
