In a laboratory experiment, a diffraction grating produces an interference pattern on a screen. If the number of slits in (inclu
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Answer:
V1 = 2221.33 L
Explanation:
The system is about a ideal gas. Then you can use the equation for ideal gases for a volume V1, temperature T1 and pressure P1:
(1)
And also for the situation in which the variables T, V and P has changed:
(1)
R: constant of ideal gases = 0.082 L.atm/mol.K
For both cases (1) and (2) the number of moles are the same. Next, you solve for n in (1) and (2):
Next, you equal these equations an solve for T2:
Finally you replace the values of P2, V2, T1 and T2:
Hence, the initial volume of the gas is 2221.33 L
Jogger moves in three displacements
d1 = 10 blocks East
d2 = 5 blocks South
d3 = 2 blocks East
now we can say
total displacement towards East direction will be
Total displacement towards South
now to find the net displacement we can use vector addition
<em>so magnitude of net displacement will be equal to 13 blocks</em>
1) Work is the scalar quantity
2) The ideal mechanical advantage of the ramp is 2
Explanation:
1)
In physics, there are two types of quantities:
- Scalar quantity: a scalar quantity is a quantity having only a number and its units. Therefore, it has no direction. Examples of scalar quantities are: distance, speed, energy, mass, temperature...
- Vector quantity: a vector quantity is a quantity having both a magnitude (number+units) and a direction. Examples of vector quantities are: displacement, velocity, force, acceleration...
Let's analyze now the quantities given:
- work : it has only a magnitude, so it is a scalar
- displacement : it has a magnitude and a direction, so it is a vector
- parallel component of force : it has a magnitude and a direction, so it is a vector
- perpendicular component of force: it has a magnitude and a direction, so it is a vector
2)
The ideal mechanical advantage (IMA) of a machine is the mechanical advantage in absence of frictional forces, so when there are no loss of energy.
For a ramp, the IMA is calculated as
where
L is the length of the ramp
h is its height
For the ramp in this problem, we have
L = 6.00 m
h = 3.00 m
Therefore, its ideal mechanical advatnage is
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Answer:
2.99 s
Explanation:
To find the time it takes for the car to fall, we just need to analyze its vertical motion.
The motion of the car along the vertical direction is a free-fall motion, so we can use the following suvat equation:
where
s = 43.9 m is the vertical distance covered by the car
g = 9.8 m/s^2 is the acceleration of gravity
t is the time of flight
Solving for t, we find: