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Bezzdna [24]
3 years ago
5

What do physicist use to help us understand how things move and work?

Physics
1 answer:
Rashid [163]3 years ago
6 0

Answer:

Models,Mathematics

am not sure pliz mark brainliest

Explanation:

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A day is defined as the time it takes for a planet to rotate once on its axis, while a year is defined as the time it takes for
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Venus should be the correct answer
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4 years ago
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True or false: the most appropriate weights to use in the wacc are book value weights.
Veseljchak [2.6K]

This statement is false as the most appropriate weights to use in the wacc are market value weights.  

The weighted average cost of capital (WACC) is the amount that a company anticipates charging on average to all of the holders of its securities in order to fund its assets (WACC).

Each capital source's cost (debt and equity) is multiplied by the appropriate weight by market value when computing WACC, and the results are then added up to arrive at the final calculation.

It matters that the external market, not management, is in charge.

The WACC is the rate of return a company must get on its base of existing assets to appease its owners, creditors, and other financiers; otherwise, they will hunt for alternative investments.

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8 0
1 year ago
Two loudspeakers emit sound waves along the x-axis. The sound has maximum intensity when the speakers are 15 cm apart. The sound
sineoko [7]

Answer:

100 cm

Explanation:

It is given that there are two loudspeakers that produces $\text{sound waves }$ along x-axis.

The maximum intensity of the sound is $\text{when the speakers are}$ at a distance of = 15 cm apart.

The sound intensity becomes zero when the separation between the speakers are increased and becomes 65 cm.

Therefore, the sound waves are in the phase, $\Delta x_1=15 \ cm$

The sound waves are out of phase when $\Delta x_2=65 \ cm$

Therefore,

$\Delta x_2 - \Delta x_1 = \frac{\lambda}{2}$

$\lambda= 2(\Delta x_2 - \Delta x_1)$

  = 2 (65 - 15)

  = 2 x 50

  = 100 cm

Hence the wavelength of the sound is 100 cm.

5 0
3 years ago
The chemical reaction that causes iron to corrode in air is given by
sergiy2304 [10]

Answer :

(A) The value of \Delta G^o at 298 K is, 1521.9 kJ

(B) The value of \Delta G^o at 3652 K is, -301.59 kJ

Explanation :

Part A :

\Delta G^o=\Delta H^o-T\Delta S^o

where,

\Delta G^o = standard Gibbs free energy  = ?

\Delta H^o = standard enthalpy = 1684 kJ = 1684000 J

\Delta S^o = standard entropy = 543.7 J/K

T = temperature of reaction = 298K

Now put all the given values in the above formula, we get:

\Delta G^o=(1684000J)-(298K\times 543.7J/K)

\Delta G^o=1521977.4J=1521.9kJ

Part B :

\Delta G^o=\Delta H^o-T\Delta S^o

where,

\Delta G^o = standard Gibbs free energy  = ?

\Delta H^o = standard enthalpy = 1684 kJ = 1684000 J

\Delta S^o = standard entropy = 543.7 J/K

T = temperature of reaction = 3652K

Now put all the given values in the above formula, we get:

\Delta G^o=(1684000J)-(3652K\times 543.7J/K)

\Delta G^o=-301592.4J=-301.59kJ

5 0
4 years ago
The pin symbolizing the greenhand ffa degree is made of what type of metal and why
max2010maxim [7]
The Greenhand degree is for first year or freshmen high school students. To receive the Greenhand degree, affiliates must have acceptable plans for a Supervised Agricultural Experience Program (SAEP) and make evident knowledge of the principle, code of ethics, motto, salute emblem, official dress, and important dates in FFA history. The Greenhand degree pin is made out of bronze for its strength and stability or durability.
5 0
4 years ago
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