Answer:
The elongation (or change in length) of a specimen divided by the original length, sometimes referred to as percent elongation.
Explanation:
Strain is defined mathematically as follows .
strain = Δ L/ L
Δ L is change in length of a wire when some force is applied on it to stretch it along its length and L is original length of a wire .
Stress is The elongation (or change in length) of a specimen divided by the original length, sometimes referred to as percent elongation.
Answer:
a. petrification
Explanation:
tar seeps = natural trade that, because of its close proximity to the ground surface, seeps from the cracks in the Earth or between rocks forming pits or pools (tar pits)
amber = fossilized resin produced by extinct coniferous trees, typically yellow in color
mummification = a process in which the skin and flesh of a corpse can be preserved by embalming and drying
Answer:
The apple fell at a distance of 4.17 m.
Explanation:
Work is defined as the force that is applied on a body to move it from one point to another. When a force is applied, an energy transfer occurs. Then it can be said that work is energy in motion.
When a net force is applied to the body or a system and this produces displacement, then that force is said to perform mechanical work.
In the International System of Units, work is measured in Joule. Joule is equivalent to Newton per meter.
The work is equal to the product of the force by the distance and by the cosine of the angle that exists between the direction of the force and the direction that travels the point or the object that moves.
Work=Force*distance* cosine(angle)
On the other hand, Newton's second law says that the acceleration of a body is proportional to the resultant of forces on it acting and inversely proportional to its mass. This is represented by:
F=m*a
where F is Force [N], m is Mass [kg] and a Acceleration [m / s²]
In this case, the acceleration corresponds to the acceleration of gravity, whose value is 9.81 m / s². So you have:
- Work= 9 J
- F=m*a=0.22 kg*9.81 m/s²= 2.1582 N
- distance= ?
- angle=0 → cosine(angle)= 1
Replacing:
9 J= 2.1582 N* distante* 1
Solving:
distance= 4.17 m
<u><em>The apple fell at a distance of 4.17 m.</em></u>
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They maintain the same distance between each other throughout the fall
Answer:
The difference in the amount of energy transferred by the two bulbs is 1200 J.
Explanation:
The energy transferred by the two lightbulbs can be calculated with the given equation:
Where P is the power and t is the time
For the 60 W lightbulb:
For the 100 W lightbulb:
Hence, the difference in the amount of energy transferred is:
Therefore, the difference in the amount of energy transferred by the two bulbs is 1200 J.
I hope it helps you!