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Ugo [173]
3 years ago
5

Consider a particle with initial velocity v⃗ that has magnitude 12.0 m/s and is directed 60.0 degrees above the negative x axis.

What is the x component v⃗ x of v⃗ ? What is the y component v⃗ y of v⃗ ?
Physics
1 answer:
tresset_1 [31]3 years ago
6 0
We are given with the data that the angle of velocity is above the negative axis. hence, the angle lies in the second quadrant with negative x axis and positive y axis. In this case, the x component is -12 cos 60 equal to -6 m/s while the y-component is 12 sin 60 equal to 6 sqrt of 3 m/s. 
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Which of the following statements most accurately differentiates potential and kinetic energy? A. Any object that has no motion
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Answer:

B. Any object that has motion has potential energy, wow any object not in motion light with the potential to do work and kinetic.

Explanation:

Potential Energy is the energy possessed by a body by virtue of its position relative to others, stresses within itself, electric charge, and other factors. Kinetic Energy is energy which a body possesses by virtue of being in motion.

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Which gas would have the slowest rate of diffusion, assuming that all gases are at the same temperature?
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A. krypton (atomic mass 83.8 amu)

B. argon (atomic mass 39.95 amu)

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6 0
3 years ago
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Sue and Jenny kick a soccer ball at exactly the same time. Sue’s foot exerts a force of 52.6 N to the north. Jenny’s foot exerts
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3 years ago
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S To minimize neutron leakage from a reactor, the ratio of the surface area to the volume should be a minimum. For a given volum
goblinko [34]

To minimize neutron leakage from a reactor, the ratio of the surface area to the volume should be a minimum. For a given volume V ,  ratio for (c) a parallelepiped of dimensions × 2 a will be \frac{6.29961}{c^\frac{1}{3} }

What will be the ratio of surface area and the volume of the parallelepiped

We will proceed by stating the equations of the surface area and the volume of each shape, and then identifying each of the surface area and the volume, we will take their ratios, and as it is asking for the shape which has the minimum surface area to volume ratio, therefore at some given volume, V=const.

The parallelepiped whose dimension is given as

2a,a,a

the surface area and the volume is given respectively by:

A=2(2a \times a)+2(a \times 2a)+2(a \times a)=10a^{2}

V=2a^{3}

Let the volume be equal to the constant c, we get:

V=c=2a^{3}\\a=(\frac{c}{2} )^\frac{1}{3}

Hence the ratio is given by:

\frac{A}{V} =\frac{10a^{2}}{2a^{3}}=\frac{5}{a}

Calculating the constants, by substituting the value of a in (3), we get:

\frac{A}{V}=\frac{6.29961}{c^\frac{1}{3} }

To learn more about parallelepiped, refer to:

brainly.com/question/27975136

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5 0
1 year ago
An elevator's electric hoist is rated at 8.0 kW and has an efficiency of 90.0%. The hoist lifts the elevator car, mass 1225 kg,
Nataly_w [17]

Part a)

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P = 8 kW

P = 8 \times 10^3 W

now the mass that is lifted above is given as

m = 1225 kg

height of the elevator lifted is

h = 9 m

now the potential energy is given as

U = mgh

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now power is defined as rate of energy

P = \frac{W}{t}

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t = 13.5 s

so it will take 13.5 s to lift up

Part b)

Electrical energy used

efficiency = 90

0.90 = \frac{Output}{Input}

0.90 = \frac{108045}{Input}

Input = 120050 J

so electrical energy used in this process will be 120050 J

6 0
4 years ago
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