By definition we have to:
It is the capacity that the human being has to think at the moment of acting before certain activities, about the possible risks that these can have, and modify their behavior so as not to receive or produce unnecessary damages.
In other words we can say that prudence means acting with caution in certain activities.
Answer:
Prudence means acting with caution.
c.Caution
B. The force does not result in displacement
C. The force and displacement are perpendicular to each other
D. The force and displacement are in the same direction
Answer:
Work is said to occur when a force is able to cause displacement of an object in the direction of the applied force. It is given by the scalar product of force and displacement.
W = F.s = F s cos θ
Thus, no work is being done when no force is applied ( ∵ F = 0, W = 0) or the force does not result into displacement (∵ s = 0, F = 0) or when the force and displacement are perpendicular to each other (∵ θ =0, cos θ =0, W =0).
Answer: D. The force and displacement are in the same direction
Explanation: The guy above me is trying to hard to put information into his answer...
Answer:
1,803,036.67 W
Explanation:
Data provided in the question:
People per hour that can be moved by lift = 49800
Height of movement, h = 190 m
Average mass per person = 70 kg
Now,
Power = Rate of doing work
Thus,
Power = ΔU
= mgh
here,
m = total mass
g = acceleration due to gravity
or
Power = (70kg × 49800)(9.8)(190)
or
Power = 6,490,932,000 J per hour
also,
Watt = Joule/second
Therefore,
Power = 6,490,932,000 ÷ 3600
= 1803036.67 W
To estimate the maximum total power needed for Squaw Valley ski area to move 49800 people per hour on their lifts, we calculate the work done per person per hour and then divide it by the time taken to travel vertically by 190 m. The estimated maximum total power needed is 3.31 x 10^8 W.
To estimate the maximum total power needed to move 49800 people per hour on a skilift at Squaw Valley, we can calculate the work done per person per hour and then divide it by the time taken to travel vertically by 190m. The work done is equal to the potential energy gained, which is given by the formula mgh, where m is the average mass per person (70 kg), g is the acceleration due to gravity (9.8 m/s^2), and h is the vertical height gained (190 m). Multiplying this by the number of people per hour gives us the total work done per hour. Dividing this by the time taken to travel the vertical height gives us the maximum power needed. The power is given by the formula P = W/t, where W is the work done and t is the time taken.
Using the given values, we have:
Work done per person per hour: (70 kg) x (9.8 m/s^2) x (190 m) = 128660 J
Total work done per hour: 128660 J x 49800 = 6.40 x 10^9 J
Time taken to travel vertically by 190m: 190 m / (9.8 m/s^2) = 19.39 s
Maximum power needed: (6.40 x 10^9 J) / (19.39 s) = 3.31 x 10^8 W
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What will that action cause her body to do? Why?
Which of Newton’s Laws applies to this situation?
Write a paragraph which incorporates all of the above information.
Answer:
In order to get back to the ship, the astronaut must throw the belt in the opposite direction the spaceship.
From Newton's third law of motion:
For every action, there is equal and opposite reaction.
In order to throw the belt away, astronaut would apply some force which cause same amount of force acting on her body in the opposite direction which would take her towards the spaceship.
890 m/s 850 m/s 790 m/s 895 m/s 870 m/s
Car A
Car B
Car C
Car D
Car E
The mass of each car is the same so car D will take the longest time to come to a full stop. Hence, option D is correct.
In mechanics, acceleration is a unit used to describe how quickly the velocity of an object varies in relation to time. The direction of the net force acting on an object determines its acceleration.
Since acceleration has both a magnitude and a direction, it is a vector quantity. Velocity is another vector quantity. Acceleration is defined as the change in velocity vector over a time interval divided by the time interval.
According to the question, we want to determine which automobile will take the longest to fully stop because we know that each one has the same mass and the same velocity. Here, we can assume that all the vehicles slow down uniformly, thus the vehicle traveling at the maximum speed will take the longest to come to a complete stop.
To get more information about acceleration :
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Answer: Car D.
Explanation:
We know that each car has the same mass, and knowing the velocity of each car, we want to know which car will require the longest time to come to a full stop. Here we may assume that all the cars decelerate at the same rate, so the car with the highest speed is the car that will take the longest income to a full stop.
The answer is car D, which velocity is 895 m/s.
B. Interference is observed with light.
C. Diffraction is observed with light.
D. Unlike sound, light waves don't need a medium to self-propagate
The correct answer to the question is : D) Unlike sound, light waves don't need a medium to self-propagate
EXPLANATION:
Before coming into any conclusion, first we have to understand the nature of sound and light.
A sound wave is a longitudinal wave which requires a medium for its propagation. It can not move in space as space contains no material medium for its propagation.
Light is normally considered as electromagnetic wave which does not require any medium for its propagation. It can travel in space also.
The interference and diffraction can not be explained by the particle nature of light.
Hence, the argument that partially support that light behaves just like a particle is the last statement i.e Unlike sound, light waves do not need a medium to self-propagate.