the answer is choice C i took the test and i got it right good luck
Jose wandered for 2 hour with speed at 2 kilometers per hour.
The speed of an item, which is a scalar quantity in everyday usage and kinematics, is the size of the change in that object's position over time or the size of the change in that object's position per unit of time.
The instantaneous speed is the upper limit of the average speed as the duration of the time interval approaches zero. The average speed of an item in a period of time is equal to the distance travelled by the object divided by the duration of the period.
Given parameters:
Distancetravelled by Jose = 4 kilometer.
Speed of Jose = 2 kilometers per hour.
Now from definition of speed:
Total time taken = Distance travelled by Jose ÷ Speed of Jose
= 4 kilometer ÷ 2 kilometers per hour.
= 2 hour.
Hence, Jose wandered for 2 hour.
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The four most common gases in dry air are nitrogen, oxygen, carbon dioxide, and water vapor.
The four most common gases in dry air are nitrogen, oxygen, carbon dioxide, and water vapor.
Nitrogen is the most abundant gas in dry air, making up about 78.6% of the air.
Oxygen is the second most abundant gas, accounting for approximately 20.9% of the air.
Carbon dioxide is present in small amounts, around 0.04%, but it plays an important role in the Earth's carbon cycle and climate. Water vapor, despite being a variable component, can make up around 0.5% of the air.
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the minimum amount of horizontal force that the man will need to apply so
that the tree will start moving?
A. 240 N
B. 360 N
C. 480 N
D. 120 N
Answer:
120 N
Explanation: First we shoud consider the forces acted on a tree
Friction foce - acting opposite to the moving direction
Weight - Directly acting downwards
Reaction - Directly acting on upwards
For minimum required force should be equal to the friction force
F = μ R
F = 0.5×480
= 120N
Answer:
Explanation:
When a person is being tailgated by another vehicle there's a risk of accident, due to the difference of speeds. When someone is being tailgated by another vehicle, it's because they vehicle doesn't work, cannot move by itself, so one vehicle impulse another.
To avoid any accident, the vehicle that's being tailgated must apply breaks often and slowly to try to maintain the same constant distance and speed than the other vehicle. This constant distance is what avoid accidents.
Therefore, the right answer is D.
Answer:
Your answer here is D
Explanation:
Slowly pressing your breaks will help ensure you are not hit by the other car. If they hit you its their fault. Hope this helps :)!