Answer:
111 seconds
Explanation:
From research, it takes 4200 J to raise 1 kg of body temperature. Which means that specific heat capacity of human body with is; c = 4200 J/Kg°C
We are told that the temperature starts at 37°C and rises to 39.7°C
Thus: Δt = 39.7 - 37 = 2.7°C
Amount of energy required is given by the formula;
q = mcΔt
We are given m = 68 kg
Thus;
q = 68 × 4200 × 2.7
q = 77112 J
From research, the human body is 25% efficient.
Formula for power with velocity is;
P = F × V
F = mg = 68 × 9.81
V = 15km/h = 4.167 m/s
P = 68 × 9.81 × 4.167
P = 2779.72 W
Since the human body is 25%
Then the power of the utilized is;
25/100 × 2779.72 = 694.93 W
Now, we now that;
Power = work done/time taken
694.93 = 77112/t
t = 77112/694.93
t = 111 seconds.
Thus, it will take home 111 seconds to feel exhausted
The bug has the greater acceleration because it has the smaller mass
The bug has a greater change in velocity (acceleration) due to experiencing equal force as a much smaller mass.
<h3>What is Acceleration ?</h3>
The rate at which the speed and direction of a moving object vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates.
- An object's velocity can alter depending on whether it moves faster or slower or in a different direction. A falling apple, the moon orbiting the earth, and a car stopped at a stop sign are a few instances of acceleration.
Learn more about Acceleration here:
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Answer:
It's Helium.
Explanation:
The superficial layers of the star compress the core as an effect of its own gravity. Therefore, atoms will be closer to each other in the core, allowing them to be combined.
A nuclear reaction occurs when light elements combine into heavier elements (that is known as nucleosynthesis). Different ways in which that can happen exist, but the most common in the Sun, according to its mass, is the Proton-Proton chain reaction. In that fusion reaction two atoms of Hydrogen are combined to form Helium.
Remember that a Helium atom is composed of two Protons and two Neutrons.
The Proton-Proton chain works in the following way:
+ = 
+ 
+ 
Two Protons combine each other () and one Deuterium () is gotten, and one Neutrino (), and one Positron () are emitted from them.
+ = 
+ 
A deuterium and Proton combine each other and a Helium three nucleus() is gotten, and a gamma ray () is emitted.
+ = 
+ +
Two Helium three nucleus combine and a Helium atom () is gotten, and two Protons are emitted.
So, when hydrogen atoms fuse together helium is created.
Answer:
dosimetry
Explanation:
dosimetry is the determination of energy imparted to matter by radiation
Answer:
A. A potential energy function can be specified for a conservative force.
TRUE
because there is no loss of energy in conservative type of forces.
B. A nonconservative force permits a two-way conversion between kinetic and potential energies.
FALSE
It is not true because energy is not conserved in non-conservative forces.
C. The work done by a nonconservative force depends on the path taken.
TRUE
It depends on total path length while in conservative it only depends on initial and final state
D. A potential energy function can be specified for a nonconservative force.
FALSE
Since energy is not stored in non-conservative forces so it is not defined for non conservative forces
E. A conservative force permits a two-way conversion between kinetic and potential energies.
TRUE
Work done against conservative forces is stored in form of potential energy so it is possible to have two way conversion.
F. The work done by a conservative force depends on the path taken.
FALSE
Conservative force work depends only on initial and final state
