Answer: Weather on Earth is caused by heat from the sun and movement of the air. All weather happens in the lower layer of Earth's atmosphere, which is a layer of gases surrounding Earth. The sun's heat warms the air in this layer to different temperature levels in different places. ... This movement of air is what we call wind.
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Explanation:
Answer:
0.799 m/s if air resistance is negligible.
Explanation:
For how long is the ball in the air?
Acceleration is constant. The change in the ball's height depends on the square of the time:
,
where
- is the change in the ball's height.
- is the acceleration due to gravity.
- is the time for which the ball is in the air.
- is the initial vertical velocity of the ball.
- The height of the ball decreases, so this value should be the opposite of the height of the table relative to the ground. .
- Gravity pulls objects toward the earth, so is also negative. near the surface of the earth.
- Assume that the table is flat. The vertical velocity of the ball will be zero until it falls off the edge. As a result, .
Solve for .
;
;
;
.
What's the initial horizontal velocity of the ball?
- Horizontal displacement of the ball: ;
- Time taken:
Assume that air resistance is negligible. Only gravity is acting on the ball when it falls from the tabletop. The horizontal velocity of the ball will not change while the ball is in the air. In other words, the ball will move away from the table at the same speed at which it rolls towards the edge.
.
Both values from the question come with 3 significant figures. Keep more significant figures than that during the calculation and round the final result to the same number of significant figures.
There could be a number of factors that affect the movement of surface water in sources such as, streams and rivers. These may include wind, bed slope, type of rocks, obstructions (say by vegetation), bed shape, etc.
The wind creates currents and causes motion. Bed slope or steepness of bed may also define how fast or slow the surface water will move. A steeper slope is associated with higher velocities, while a gentle slope will cause slow flow. Higher velocities will also enable movement of materials carried by river (such as silt), while slower velocities would force the settlement of such material, causing obstructions in its own path. Any obstruction in the path of water causes change of course (depending on the size or magnitude of obstructions). This can be seen in embankments and cutting by the streams. The rock types in the region and bed also affect the water motion. Another important factor related to the flow is the interaction between surface and groundwater.
link: https://www.enotes.com/homework-help/what-three-factors-describe-movement-surface-water-507498
Hope this helps.
Answer:
Explanation:
= radius of the loop
= mass of the block
= speed of the block at top of the loop at point A
= magnitude of acceleration of block at A
At point A, the block moves in a circle and hence experience centripetal force. Due to this centripetal force, the centripetal acceleration of the block can be given as