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3 years ago

if an object's density is decreasing but its mass stays constant, what must be true of the object's volume?

Physics

1 answer:

astra-53 [7]3 years ago

8 0

<h2>Answer</h2>

The volume will be <u>increased</u>

<h2>Explanation</h2>

Look at the formula

$Density = Mass/Volume$

If the mass increase the density will be increased because of their direct relationship. But in the case of constant mass. The volume increase the density will decrease because there is an inverse relationship exists between them. In the inverse relationship, the two objects perform differently. for example, if you are going to inflate the balloon, its volume will increase but density decrease

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Silicon sodium krypton potassium. which has the least metalic character

umka21 [38]

Krypton is the least metallic. Because it is a noble gas. The elements go from left to right in order of most to least metallic. Krypton is the farthest right out of all of the elements you listed.

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4 years ago

What is the maximum kinetic energy of electrons ejected from barium when illuminated by white light, to 750 nm?

Ugo [173]

Answer:

$1.0045\times10^{-19}$ J

Explanation:

The complete statement is given as

What is the maximum kinetic energy of electrons ejected from barium (Wo = 2.48 eV) when illuminated by white light, 400 nm to 750 nm ?

$\lambda$ = wavelength of the white light = 400 nm = 400 x 10⁻⁹ m

$c$ = speed of white light = 3 x 10⁸ ms⁻¹

Energy of the white light is given as

$E = \frac{hc}{\lambda} = \frac{(6.63\times10^{-34})(3\times10^{8})}{400\times10^{-9}}\\E = 4.9725\times10^{-19} J$

$W_{o}$ = Work function of barium = 2.48 eV = 2.48 x 1.6 x 10⁻¹⁹ J

$K$ = Maximum kinetic energy

Using photoelectric equation we have

$E = W_{o} + K\\4.9725\times10^{-19} = 2.48\times1.6\times10^{-19} + K\\K = 1.0045\times10^{-19} J$

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3 years ago

Describe a line that indicates moving backward on a graph

Vladimir [108]

Answer:

time speed accelaration negatives backwards

Explanation:

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3 years ago

What is the mass of a school bus if it can accelerate from rest to 15.5 m/s over 8.25

alexandr1967 [171]

The mass of a school bus if it can accelerate from rest to 15.5 m/s over 8.25s with 7,500 N of force is 3989.4kg.

HOW TO CALCULATE MASS:

The mass of an object can be calculated by dividing the force applied to the object by its acceleration.

According to this question, a bus can accelerate from rest to 15.5 m/s over 8.25s. The acceleration can be calculated as follows:

a = (v - u)/t

a = 15.5 - 0/8.25

a = 15.5/8.25

a = 1.88m/s²

The mass of the bus = 7500N ÷ 1.88m/s²

The mass of the bus = 3989.4kg

Therefore, the mass of a school bus if it can accelerate from rest to 15.5 m/s over 8.25s with 7,500 N of force is 3989.4kg.

Learn more about mass at: brainly.com/question/20259048?referrer=searchResults

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3 years ago

The competitive exclusion principle states that _______.

nikdorinn [45]

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4 years ago

Read 2 more answers