Recall that power is the amount of work done per unit time,
P
=
W
t
When you're lifting a box, you're working against gravity. If you displace a box
1.5
m
in the positive direction, you're doing,
W
=
200
N
⋅
1.5
m
⋅
cos
(
0
°
)
≈
300
J
of work in one second.
Hence, the power required to execute this lift is approximately,
300
J
1.0
s
≈
300
W
Christianity and western art in general allows for depiction of people--saints, holy men and women, children, etc. Islamic art does not allow for the depiction of people. There's an emphasis in Islamic art on geometric form, murals, and vegetation. Animals are rare in Islamic art, but you can occasionally find a piece that incorporates one.<span>
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Your performance on the pacer test is used to measure cardiovascular components of health-related fitness
Answer: 1.1·10^5 m/s
Explanation: speed = wavelength · frequency v = λf and
frequency f = 1/T , in which T = period
Speed v= λ/T = 3.2·10^-7 m /2.8·10^-12 s = 114285,7 m/s
Answer: The volume of an ideal gas will triple in value if the pressure is reduced to one-third of its initial value
Explanation:
We can determine this from the gas laws. Using Boyle's law, which states that "the pressure of a given mass of an ideal gas is inversely proportional to its volume at a constant temperature"
Mathematically, P ∝ (1/V)
Since P ∝ (1/V), we can then write that
P = k(1/V)
Where P is the pressure, V is the volume and k is the proportionality constant
PV = k
We can then write that
P1V1 = P2V2 = P3V3 = ...
Hence, P1V1 = P2V2
Where P1 is the initial pressure of the gas
P2 is the final pressure of the gas
V1 is the initial volume of the gas
and V2 is the final volume of the gas
From the question, we want to determine what will make the new volume be thrice the initial volume.
Hence,
P1 = P
V1 = V
P2= ??
V2 = 3V
Therefore,
P × V = P2 × (3V)
P2 = PV/3V
P2 = P/3 = 1/3(P)
This means the volume of an ideal gas will triple in value if the pressure is reduced to one-third of its initial value