a ball is thrown upward at 25 m/s from the ground. what is the average velocity and average speed of the ball after 5 seconds?
Answers
When the ball reaches the highest point, its velocity will be zero. So final velocity is v=0m/s
Here, the time to reach highest point is equal to time to hit ground from highest point.
Consider upward motion, the acceleration of the ball is a=−g=−9.8m/s
2
(minus for motion opposite to gravity)
If t be the required time.
Using v=u+at,
0=25+(−9.8)t
⟹ t=2.5s
Thus the ball hits the ground after 2.5 seconds after reaching its highest point.
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Answer: hydroxyl ion
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When base is dissolved in water it dissociate and produce an hydroxyl ion
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2) C would need the least effort, because the longer the effort distance, the least the effort applied.
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polar easterlies
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doldrums
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Just need to type something more to be able to post
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Explained
Explanation:
The proteins(sometimes are called celluar ligands) outside the cell can bind to a receptor protein( generally found on the cell membranes) on the cell surface, causing it( receptor protein) to change the shape and sending a signal inside the cell.
Final answer:
A protein exterior to a cell can influence intracellular processes through receptors on the cell's surface. This change can affect DNA transcription, regulate cell cycle, or stimulate cell death. Malfunctions in these proteins can lead to health issues like cancer, asthma, and hypertension.
Explanation:
A protein outside the cell can cause events to happen inside the cell with the help of the protein receptors on the cell's plasma membrane. When a molecule binds to the receptor on the cell's surface, it triggers a change in the receptor's structure. This change then affects the microfilaments inside the cell, which in turn initiates a series of chemical signals inside the cell affecting the transcription of DNA. This process can regulate activities such as the cell cycle or initiate cell death, also known as apoptosis, under certain conditions.
For example, external events such as cellular crowding or hormonal changes can influence cell division. Another example can be seen in T-cells. They target foreign cells for destruction by the immune system. If these T-cells accidentally target the cells of their own organism, this can lead to autoimmune diseases. In such cases, the T-cell binds to the 'self' proteins which triggers apoptosis to remove the harmful cell.
Errors in the structure of these receptor proteins can lead to various health issues like hypertension, asthma, heart disease, and cancer.
Learn more about Cellular Communication here:
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b) Be half as great
c) Be one fourth as great
d) Will be 1/16 as great
e) Be four times greater
Answers
Answer:
e) Be four times greater
Explanation:
Here we have to use Newton's gravitational law that relates the gravitational force between two objects with their masses ( &
) and the distance between them (
) in the next way:
(2)
Now if distance between asteroids is halved:
Note that because (1) is F so:
It's four times greater!