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What is coefficient of friction between water and PVC tube?
The coefficient of friction between water and PVC is typically low, around 0.2-0.3. This means there is relatively little resistance when water flows through a PVC tube. The smooth surface of PVC helps reduce frictional forces.
Is there any change in resistance of carbon composition resistor due to change in temperature?
yes, calculate it from temperature coefficient of resistance.
In a long-tube vertical evaporator why heat trasfer coefficient is low at the bottom?
It's lower mainly because there's no boiling due to the higher hidrostatic pressure.
What is the coefficient in a linear equation called?
Due to some perversity in human nature, it is called a coefficient!
Find the change in volume of an aluminium sphere of 0.4m radius when it is heated from 0 to 100degree centigrade?
The change in volume of an object due to temperature change is given by the coefficient of volume expansion (α), which for aluminum is about 0.000023 per degree Celsius. Given the initial temperature change from 0 to 100 degrees Celsius, the total change in volume can be calculated using the formula: ΔV = V * α * ΔT, where V is the initial volume, α is the coefficient of volume expansion, and ΔT is the change in temperature. Substituting the values, you can find the change in volume of the aluminum sphere.
Why is coefficient of discharge of venturi meter is more than coefficient of discharge of orifice meter?
In Venturi meter losses are less so coefficient of discharge is higher whereas in orifice meter due to no convergent and divergent cones there are more losses and hence its coefficient of discharge is less.In venturi meter losses are low due to steamline shape of the diffuser and the pressure gradient is not abrupt as in case of orifice meter.
Why does the resistance of a thermistor change when you change its temperature?
The resistance of a thermistor changes when its temperature changes due to the inherent properties of the thermistor material. In a negative temperature coefficient (NTC) thermistor, the resistance decreases as the temperature increases, whereas in a positive temperature coefficient (PTC) thermistor, the resistance increases as the temperature rises. This change in resistance is caused by the variation in the number of charge carriers (electrons or holes) and their mobility within the material as temperature changes.
What happens when you blow over the mouth of a test tube which is half filled with water?
Blowing over the mouth of the test tube will create a decrease in air pressure inside the tube. This decrease in pressure will cause the water in the test tube to rise up due to the higher pressure outside the tube. Ultimately, the water level in the test tube will rise as a result of the change in pressure.
What is the formula for calculating volume change due to heat?
That depends on the exact details. For a gas, the ideal gas law is usually a good approximation: other things being equal, the volume is directly proportional to the absolute temperature (that is, the temperature expressed in kelvin). For a liquid or gas, the expansion is much less than in a gas. You can look up the coefficient of expansion for a specific substance, and then use the definition of the coefficient; that is, the volume change is equal to (volume) times (temperature difference) x (coefficient of volume expansion).
Why do the standard resistance are made of magnin?
due to high resistance and low temprature coefficient
Can be a triode tube PET 25W be damage due to electric fluctuation?
Can a triode tube PET 25W be damaged due to electric fluctuation
How do you create a vacuum on a siphon?
To create a vacuum on a siphon, you need to first fill the siphon tube completely with liquid before beginning the siphoning process. Then cover one end of the tube with your finger or a stopper, and quickly submerge the other end into the liquid source while keeping the tube sealed. Once the submerged end is in place, remove your finger or stopper from the other end to start the siphoning action. The vacuum will be created as the liquid starts flowing through the siphon due to gravity.
