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bonufazy [111]
3 years ago
13

Please Help Best and Right answer will mark brainliest!!

Physics
2 answers:
evablogger [386]3 years ago
4 0

Answer:

whats the question

Explanation:

?????????????

Sindrei [870]3 years ago
3 0

Answer:

Explanation:

I am sorry but I am not able to see the question

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11. Which of the following forces is a contact force? *
dedylja [7]

Answer:

B

Explanation:

Gravity is an invisible force, and so is magnetism and electricity. Friction involves the rubbing of things together to create energy.

5 0
4 years ago
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Can work done=mass*acceleration*displacement(work=m*a*s)
Airida [17]

no, work is = force * distance or displacement


5 0
4 years ago
By what factor does the peak frequency change if the celsius temperature of an object is doubled from 20.0 ∘c to 40.0 ∘c?
mart [117]

Answer:

it increases by a factor 1.07

Explanation:

The peak wavelength of an object is given by Wien's displacement law:

\lambda=\frac{b}{T} (1)

where

b is the Wien's displacement constant

T is the temperature (in Kelvins) of the object

given the relationship between frequency and wavelength of an electromagnetic wave:

f=\frac{c}{\lambda}

where c is the speed of light, we can rewrite (1) as

\frac{c}{f}=\frac{b}{T}\\f=\frac{Tc}{b}

So the peak frequency is directly proportional to the temperature in Kelvin.

In this problem, the temperature of the object changes from

T_1 = 20.0^{\circ}+273=293 K

to

T_2 = 40.0^{\circ}+273 = 313 K

so the peak frequency changes by a factor

\frac{f_2}{f_1} \propto \frac{T_2}{T_1}=\frac{313 K}{293 K}=1.07

8 0
3 years ago
What are the layers of the earth
AleksAgata [21]

Answer:

CRUST, UPPER MANTLE, LOWER MANTLE, INNER CORE, OUTER CORE,

Explanation:

how do u not know this

8 0
3 years ago
Height-weight charts are an accurate way to measure ideal body weight.
Mademuasel [1]

Answer:

True

Explanation:

Charts are the most accurate way to measure most things. For example, a chart can help you understand how the population of the world has changed since 1998.

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3 years ago
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