Why does the skateboarder continue to move forward when he hits the trash?
Answer:
According to Newton's first law: An object at rest will remain at rest unless acted on by an unbalanced force. An object in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
There is a force that moves the skater and his skate forward, after the hit, his speed is reduced, but this force is not completely counteracted, and that's why he continues moving forward.
The diagram below is supposed to show how a sea breeze is created by convection, but only two of the arrows are drawn correctly. Select the arrows that are drawn correctly.
Answer:
cool air and upper air
Explanation:
With three temperature readings all mean the same thing?
A. 100 Kelvin, 0 degrees Celsius, 32 degrees Fahrenheit
B. 273 Kelvin, 100 degrees Celsius, 212 degrees Fahrenheit
C. 373 Kelvin, 100 degrees Celsius, 212 degrees Fahrenheit
D. 273 Kelvin, 0 degrees Celsius, 212 degrees Fahrenheit
Ans: C
Temperature can be expressed in terms of :
Kelvin (K), Celsius (C) or Fahrenheit (F)
The three units are interchangeable.
1) Kelvin(K) and Celsius(C)
K = 273 + C ----(1)
2) Celsius(C) and Fahrenheit(F)
F = (C*9/5) + 32 ---(2)
Option C is correct because:
From eq(1), when C = 100
K = 273 + 100 = 373
From eq(2), when C = 100
F = (100*9/5)+32 = 212
What would happen if guard cells in a plant stopped working?
A.
Photosynthesis would occur more slowly.
B.
Stomata would not open and close.
C.
Diseases would quickly invade the plant.
D.
Chloroplasts would change color.
If guard cells in a plant stop working then the stomata would not open and close.
Answer: B
Explanation
Guard cells are present in leaves of the plants.
It is located in surrounding of each stomata of the plants.
It is located in the leaves such that the stomata can be surrounded by these cells.
Its working is to open and close the stomata in regular intervals.
The regular intervals meant at morning and at night.
At morning, the stomata need to be open so that it can intake oxygen, water and release carbon-di-oxide.
The water taken is stored in the stomata in the night as the guard cells help to close the stomata at night preventing the loss of water.
But if the guard cells fail to work properly, then the stomata will remain either in open condition always or in close condition always.
This will lead to continuous water loss and change in the rate of transpiration of plants which will be harmful for it.
Thus the guard cells failure will lead to block the openings of stomata.
Final answer:
Guard cells regulate the opening and closing of stomata, which are crucial for gas exchange in plants. If guard cells stopped working, the stomata would not open and close, affecting photosynthesis and transpiration. The most direct consequence of nonfunctional guard cells would be that stomata would not open and close.
Explanation:
The stomata and guard cells play critical roles in plant physiology. Stomata are openings on the leaf surface that allow gases to enter and exit the plant, which is essential for photosynthesis and respiration. The guard cells surround each stoma and regulate its opening and closing. If guard cells stopped working, the stomata would not open and close properly. This would lead to a cessation of transpiration and affect the plant's ability to acquire necessary carbon dioxide for photosynthesis, ultimately slowing or stopping this process.
If guard cells did not function correctly, this could potentially lead to water stress due to an inability to conserve water on hot, dry days, as plants close stomata to prevent water loss. Moreover, if stomata remained closed, it would limit the intake of carbon dioxide, needed for photosynthesis. Therefore, if guard cells in a plant stopped working, the most accurate answer would be B. Stomata would not open and close.
On the way to the lungs, air passes through the
(1) trachea
(2) esophagus
(3) intestine
(4) stomach
PLEASE HELP!!!!! I REALLY NEED HELP
Given the following sets of values, calculate the volume in liters.
P = 102.3 kPa
V = ____ L
n = 0.00831 mol
T = 298.15 K
Use R = 8.314 L- kPa/ mol-K
Sarah performs an experiment to see whether bees prefer red flowers or yellow flowers. Look at this table of results from the What is the independent variable?.
it's c.color of flower
If the reaction uses 140 grams of iron, how much rust could be produced?
What is it called when people your age influence how you act or what you do?
A. A healthy friendship
B. Peer pressure
C. Railroading
D. Self-involvement
It is called peer pressure when people your age influence how you act or what you do and the correct option is option B.
What is peer pressure?Peer pressure is the process by which members of the same social group influence other members to do things that they may be resistant to, or might not otherwise choose to do.
Essentially, the person or group doing the pressuring aims to force someone else to do something they do not want to do, or would not do otherwise.
Peer pressure can be either a positive or negative influence that one peer, or group of peers, has on another person.
Therefore, It is called peer pressure when people your age influence how you act or what you do and the correct option is option B.
Learn more about Peer pressure, here:
https://brainly.com/question/18590062
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Instructions: Select the correct answer.
An electromagnet is a device in which moving electric charges (current) in a coil of wire create a magnet.
What’s one advantage of using electromagnets in devices?
A. Electromagnets have a strong, constant magnetic field.
B. Electromagnets are more powerful than permanent magnets.
C. Electromagnets don’t need a source of electricity to work.
D. Electromagnets can easily be turned on and off.
Final answer:
One advantage of using electromagnets is that they can be easily turned on and off, allowing for precise control over their magnetic fields which is useful in many electronic devices and industrial applications. The correct option is (D).
Explanation:
An electromagnet is a device where electric current produces a magnetic field. A major advantage of electromagnets used in devices is that they can be easily controlled; one of the ways this control is manifested is in the ability to easily turn them on and off.
Electromagnets are invaluable in various applications due to their ability to alter magnetic fields rapidly by adjusting the electric current flowing through them, allowing for a diverse range of uses, from industrial machinery to medical imaging equipment.