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Paha777 [63]
3 years ago
13

Which best describes a value for density

Physics
1 answer:
scoray [572]3 years ago
8 0
Density can be any number, as long as it has the right units.

A unit of density has to be (a unit of mass) divided by (a unit of volume).
The most common one is gram/cm^3.
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The acceleration of a block attached to a spring is given by a=−(0.324m/s2)cos([2.50rad/s]t) a = − ( 0.324 m / s 2 ) c o s ( [ 2
allsm [11]

Answer:

Looks like you have:

a = -.324 cos 2.5 t

In this case   ω^2 A = .324

ω = 2.5

f = ω / (2 * pi) = 2.5 / 6.28 = .40 / sec

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Which is a sub-atomic particle?
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lcompute the increase in length of 500 m of copper wire when it's temperature changes from 12 degrees celsius to 32 degrees Cels
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Explanation:

step by step explanation

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Steam at 100°C is condensed into a 38.0 g aluminum calorimeter cup containing 280 g of water at 25.0°C. Determine the amount of
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Answer:

7.2g

Explanation:

From the expression of latent heat of steam, we have

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mathematically,

m_{s}c_{w} \alpha _{w} + m_{s}l=m_{w}c_{w} \alpha _{w} +m_{c}c_{c} \alpha c_{c}

L=specific latent heat of water(steam)=2268J/g

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c_{c}=specific heat capacity of calorimeter =0.9J/gk

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m_{c}=38g

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\alpha _{c}=(40-25)=15

\alpha _{w}=(40-25)=15

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Note: the temperature of the calorimeter is the temperature of it content.

From the equation, we can make m_{s} the subject of formula

m_{s}=\frac{m_{w}c_{w} \alpha +m_{c}c_{c}\alpha}{c_{w}\alpha +l}

Hence

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Hence the amount of steam needed is 7.2g

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2 years ago
How does the observed pitch of the buzzer change as it moves
andriy [413]

The answer is

Pitch of the buzzer increased (higher tone) as it moves towards the observer

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