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Why do thunderstorms occur during cold fronts?
Thunderstorms occur during cold fronts because the cold air mass is denser and undercuts the warm air mass, causing it to rise rapidly and form cumulonimbus clouds. This rapid lifting, combined with the instability in the atmosphere, leads to the development of thunderstorms along the leading edge of the cold front.
Why balloon fly upward?
Because of the upward force pushing it up. It is too strong to let gravity pull it down.
Why does a helium balloon rise higher than an air balloon?
Any object surrounded by a fluid is buoyed up by a force equal to the weight of the fluid it displaces. There's an upward force on a cork in water that's equal to the weight of the water it displaces. There's an upward force on a helium balloon that's equal to the weight of the air it displaces. It so happens that a balloon full of helium weighs less than the air it displaces, so the upward force on it is greater than its weight.
What is the relationship between a buoyant object and the water it displaces?
Archimedes' principle states that the upward buoyant force that is exerted on a body immersed in a fluid, whether fully or partially submerged, is equal to the weight of the fluid that the body displaces and acts in the upward direction at the center of mass of the displaced fluid.
What is the meaning of upthrust force?
Upthrust force, also known as buoyant force, is the force exerted by a fluid on an object immersed in it, pushing the object upward. It is equal to the weight of the fluid that the object displaces. Upthrust force is what allows objects to float in a fluid.
Does cold air move up or down?
Cold air is denser than warm air, so it tends to sink downward. As it does, it displaces the warmer air, pushing it upward. This creates a convection current where cold air sinks and warm air rises.
What force allows boats to float?
Buoyancy is the force that allows boats to float. When a boat displaces water, it experiences an upward force equal to the weight of the water it displaces, keeping it afloat.
Which characteristic is not true of cold fronts A they lift upward B they push warm fronts downward C they move more slowly than warm fronts D none of these are true?
None of the choices are true.
What is the force that acts in an upward direction against the force of gravity so it makes an object lighter?
The force that acts in an upward direction to counteract the force of gravity and make an object feel lighter is called buoyancy. This force is exerted by a fluid (such as air or water) on an object immersed in it, pushing the object in the opposite direction of gravity.
What does produces an upward force?
Buoyancy produces an upward force on an object immersed in a fluid, such as water or air. This force is equal to the weight of the fluid that the object displaces - known as Archimedes' principle.
What is it called to shoot the basketball by pushing it upward and outward with one hand?
a shot
Why does an object seem lighter in water?
because of the upthrust in water it weighs less and floats. An object in water will recieve an upthrust equal to the weight of water it displaces . submarines when neutrally ballasted could hang by the periscope that is just under the water raise periscope sub sinks down as water covers periscope starts to rise again, Any floating object displaces its own weight of fluid.
