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What can you say about the pressure at a point as the direction of the funnel changes?
Wiki User
∙ 7y ago
The pressure will change. How it will change will depend on where, within the funnel, the point is.
Wiki User
∙ 7y ago
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How voltage become zero in centre point?
If you have an alternating current, which changes direction, and we graph the direction in terms of positive and negative, then at some point, as the current changes from positive to negative, and from negative to positive, it must pass through zero. If you imagine a car, driving forwards, that then changes direction and drives in reverse, there must be a point when it is not moving. Changes of direction, or voltage, are not instantaneous.
Is the velocity of an oscillating charge changes when it moves to and fro in a wire?
Of course it changes. For example, at some point it is moving in one direction; half a cycle later it is moving in the opposite direction.
Does the speed of an object change when the speed changes?
Yes. The velocity changes when the direction of motion changes, because the definition of 'velocity' is 'speed and the direction'. If either speed or direction changes, then we say the velocity has changed. Notice that if the direction changes, then the velocity changes even if the speed doesn't. "Velocity" is not just a bigger word that you use for 'speed' when you want to sound smart. They mean different things.
Why must the boiling point be measured at constant atmospheric pressure?
because otherwise the measurement will be different. This is because the boiling point of thingss is changes at a low atmospheric pressure.
When a vibration is at maximum displacement what is its velocity?
Zero. That's the instant at which its velocity changes direction. In order to do that, its magnitude has to be zero at that point in time.
The point at which the curve changes direction is called the?
inflection point
How voltage become zero in centre point?
If you have an alternating current, which changes direction, and we graph the direction in terms of positive and negative, then at some point, as the current changes from positive to negative, and from negative to positive, it must pass through zero. If you imagine a car, driving forwards, that then changes direction and drives in reverse, there must be a point when it is not moving. Changes of direction, or voltage, are not instantaneous.
what are the changes in the boiling point of water in high air pressure?
The boiling point increase at high pressure.
Does melting point and boiling point of liquid changes from altitude to altitude?
The boiling point depends on altitude (pressure). The effect on the melting point is not significant.
What should you do if the combination of extremity elevation and direction and direct pressure do not control the bleeding?
Add pressure to the appropriate pressure point
What is the temperature at which matter changes from a liquid to a solid?
the freezing point or melting point, depending on the direction of change.
What is the meaning of thermodynamic melting point?
Thermodynamic melting point is the temperature and pressure at which a solid will be in equilibrium with a liquid of the same composition. It is not a single point, rather it is a two-dimensional function of temperature and pressure. For most substances, the effect of pressure is rather gradual so that large changes in pressure are required to cause any significant changes in the melting point temperature.
Is the velocity of an oscillating charge changes when it moves to and fro in a wire?
Of course it changes. For example, at some point it is moving in one direction; half a cycle later it is moving in the opposite direction.
What is the point at which a graph changes directions?
Turning points are the points at which a graph changes direction from increasing o decreasing or decreasing to increasing.
Why does a funnel cloud happen?
Funnel clouds form when a tornado or developing tornado pulls in moist air. As the air is pulled inward it experiences a pressure drop which cools it to the point that the moisture condenses. For how tornadoes form see the link below.
What is your understanding of effects of pressure changes on the boiling point of a liquid?
The effects of changing pressure on the boiling point of a liquid is that the water becomes temperature becomes higher. The boiling point will continue to rise depending on the amount of pressure applied.
How does blowing air through a funnel pick up a ping-pong ball?
I think you're referring to the funnel apparatus where the large end of the funnel is pointed down. The funnel itself is just a little larger than the ping-pong ball. Air is blown through the funnel downward towards the ping-pong ball, but the ball doesn't drop. Instead it is held fast inside the funnel. The explanation lies with the Bernoulli Principle. This principle states that along any streamline of air (a streamline is the path that an air molecule takes), if the velocity of the air drops then the static pressure at that point will rise, and vice-versa. So what happens with the funnel and ping-pong ball is that the air coming out of the funnel has to flow around the ball and therefore it becomes constricted against the sides of the funnel. It doesn't have much room to get by, in other words. That means it has to flow faster over the top of the ball. Faster = lower pressure. When it gets by the ball and expands in the funnel, it slows down. Slower = higher pressure. This pressure difference (high pressure below, low pressure above) is what keeps the ball suspended in the funnel.
