Understand what each symbol stands for.<span><span><span>Vi</span> stands for “initial velocity”</span><span><span>Vf</span> stands for “final velocity”</span><span>a stands for “acceleration”</span><span>t stands for “time”</span></span>
Answer:
coordination
Explanation:
I know because I just took the test and got the answer right.
Answer:
Explanation:
From the first law of thermodynamics
Q=ΔU+W
Q=heat supplies to the system
ΔU=change in internal energy of the system
W= work done by the gas by the system
Q =12 KJ
ΔU==(mR/k-1)ΔT
ΔU=*(460-400)
=14.924 KJ
Q=ΔU+W
W=-2.924 KJ
=+
=work done by the air
= P(V2-V1)
=mRT2-mRT1
=mR(T2-T1)=0.138*0.287*(460-300)=
=6.33 KJ
=+
=-2.924-6.33
=-9.26 KJ
Answer:
(a) W= 44N
(b)W= 31.65 N
Explanation:
Data
T=44 N : Maximum force that the rope can withstand without breaking
Newton's second law:
∑F = m*a Formula (1)
∑F : algebraic sum of the forces in Newton (N)
m : mass in kilograms (kg)
a : acceleration in meters over second square (m/s²)
(a) We apply the formula (1) at constant speed , then, a=0
W: heaviest fish that can be pulled up vertically
∑F = 0
T-W =0
W = T
W= 44N
(b) We apply the formula (1) , a= 1.26 m/s²
W: heaviest fish that can be pulled up vertically
W= m*g
m= W/g
g= 9.8 m/s² : acceleration due to gravity
∑F = 0
T-W = m*a
T= W+(W/g)*a
44=W*(1+1/9.8)* (1.26 )
44= W* 1.39
W= 44/1.39
W= 31.65 N
The concept required to solve this problem is hydrostatic pressure. From the theory and assuming that the density of water on that planet is equal to that of the earth we can mathematically define the pressure as
Where,
= Density
h = Height
g = Gravitational acceleration
Rearranging the equation based on gravity
The mathematical problem gives us values such as:
Replacing we have,
Therefore the gravitational acceleration on the planet's surface is