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zubka84 [21]
3 years ago
6

Which changes of state occur between solids and gases? Check all that apply.

Physics
2 answers:
KatRina [158]3 years ago
8 0

Answer:

deposition, sublimation

Explanation:

lapo4ka [179]3 years ago
3 0

Answer:

vaporization

sublimation

(i think)

Explanation

think of the definitions and apply them to changes

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What is the direction of the normal contact force of the road on the wheels?
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Explanation:

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2 years ago
A spring stretches by 0.0208 m when a 3.39-kg object is suspended from its end. How much mass should be attached to this spring
sashaice [31]

Answer:

COMPLETE QUESTION

A spring stretches by 0.018 m when a 2.8-kg object is suspended from its end. How much mass should be attached to this spring so that its frequency of vibration is f = 3.0 Hz?

Explanation:

Given that,

Extension of spring

x = 0.0208m

Mass attached m = 3.39kg

Additional mass to have a frequency f

Let the additional mass be m

Using Hooke's law

F= kx

Where F = W = mg = 3.39 ×9.81

F = 33.26N

Then,

F = kx

k = F/x

k = 33.26/0.0208

k = 1598.84 N/m

The frequency is given as

f = ½π√k/m

Make m subject of formula

f² = ¼π² •(k/m

4π²f² = k/m

Then, m4π²f² = k

So, m = k/(4π²f²)

So, this is the general formula,

Then let use the frequency above

f = 3Hz

m = 1598.84/(4×π²×3²)

m = 4.5 kg

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They say nothing about the acceleration at intermediate points - the equation just says that his average speed increased from 4 m/s to 7 m/s during a 5 sec period

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3 years ago
When most chemical reactions take place, some ____ in the reactants must be broken, a process that requires energy.
BabaBlast [244]

Answer:

compound I believe number 1

6 0
3 years ago
Read 2 more answers
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