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Lilit [14]
3 years ago
12

A person is singing in the shower. They notice that as certain notes become very loud, the shower walls vibrate. Which statement

describes this effect? (1 point)
The note is one of the harmonic frequencies for the shower.

The note is one of the natural amplitudes for the shower.

The note is one of the nodes for the shower.

The note is one of the antinodes for the shower.
Physics
1 answer:
AysviL [449]3 years ago
8 0

Answer:

the note is one of the harmonic frequencies for the shower.

I just took the quiz, this is correct. Hope this helps:)

Explanation:

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Identify how any organisms from the video showed variation, competition or overproduction. (Make sure to incude the name of the
Masja [62]

Answer:

Overproduction can lead to other side effects, which can be considered an advantage or a disadvantage. When more offspring are produced, it increases the odds of a spontaneous variation.

8 0
3 years ago
An object with a mass of m = 122 kg is suspended by a rope from the end of a uniform boom with a mass of M = 74.9 kg and a lengt
creativ13 [48]

The horizontal rope is under 7,019.4 N of tension.

The pulling force conveyed axially by a string, cable, chain, or another similar device, or by the ends of a rod, is referred to as tension.

The action-reaction pair of forces acting at the ends of the element can also be referred to as tension.

The tension unit is the Newton.

the horizontal rope is tense.

The following formula is used to determine the horizontal rope's tension:

Apply the torque principle;

Mg (L/2) sin + mg L sin = T(L/2) cos

M + 2mg sin/cos = T

(M + 2m)g tan = T

let θ = 66⁰ (The question should include this value)

(M + 2m)g tan = T

T = (74.9 + 2 x 122)(9.8) (tan 66)

T = 7,019.4 N

7,019.4 N is the tension in the horizontal rope.

Learn more about tension here: brainly.com/question/918617

#SPJ1

7 0
2 years ago
The diffuser in a jet engine is designed to decrease the kinetic energy of the air entering the engine compressor without any wo
wariber [46]

Explanation:

Expression for energy balance is as follows.

        \Delta E_{system} = E_{in} - E_{out}

or,          E_{in} = E_{out}

Therefore,  

         m(h_{1} \frac{v^{2}_{1}}{2}) = m (h_{2} \frac{V^{2}_{2}}{2})

          h_{1} + \frac{V^{2}_{1}}{2} = h_{2} + \frac{V^{2}_{2}}{2}

Hence, expression for exit velocity will be as follows.

           V_{2} = [V^{2}_{1} + 2(h_{1} - h_{2})^{0.5}

                      = V^{2}_{1} + 2C_{p}(T_{1} - T_{2})]^{0.5}

As C_{p} for the given conditions is 1.007 kJ/kg K. Now, putting the given values into the above formula as follows.

       V_{2} = V^{2}_{1} + 2C_{p}(T_{1} - T_{2})]^{0.5}                    

                  = [(350 m/s)^{2} + 2(1.007 kJ/kg K) (30 - 90) K \frac{1000 m^{2}/s^{2}}{1 kJ/kg}]^{0.5}

                 = 40.7 m/s

Thus, we can conclude that velocity at the exit of a diffuser under given conditions is 40.7 m/s.

5 0
3 years ago
Se ha quemado magnesio (reacción con el oxígeno) y se obtuvieron 12g de óxido de magnesio (II). ¿Cuánto magnesio se quemó? ¿Qué
Sedaia [141]

Answer:

The first answer is 7,24g Mg

The second answer is 3,36L O2

Explanation:

Atomic masses: Mg= 24,3 ; O=16

Solution: MMgO = 40,3 g/mol

2 Mg + O2 => 2 MgO

1) 12 g MgO x (2x24,3 g Mg / 2x 40,3 MgO) = 7,24 g Mg

2)

At  first calculate moles from Oxygen:

12 g MgO x ( 1 mol from Oxygen/ 2 x 40,3 g MgO ) = 0,15 moles from Oxygen

then ....

0,15 moles from Oxygen x (22,4 lts / 1 mol from Oxygen ) = 3,36 lts

22.4 liters is the constant that we use in this equation, it is a value that is repeated since we are in the presence of a gas with ideal behavior, so it is considered that the normal molar volume of ideal gaseous substances is always 22.4 liters, estimated with a temperature of 0º C and a pressure of 1 atmosphere. (constant temperature and pressure)

7 0
3 years ago
1. Why is the theory that all things are made up of atoms a theory and not a fact?
steposvetlana [31]
Because there is no record of all things. As we have partially unknow information, it can never be held as a fact.
3 0
3 years ago
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