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4 years ago

List things in your house and put them in order of density

Physics

2 answers:

Mandarinka [93]4 years ago

7 0

Like appliances? lamp,tv,tables,fridge,etc?

ELEN [110]4 years ago

3 0

I don't know what's in your house! lol. try naming things like: ball, lamp, cup, bowl.

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A car, initially traveling 28.0ft/s, steadily speeds up to 44.0ft/s in 4.50s. Determine all unknowns and answer the following qu

dexar [7]

Explanation:

hi do u mind helping me with something lmak

5 0

3 years ago

What is the length of the x-component of the vector shown below?

kondaur [170]

If you shine a light straight down onto that vector, then the length of its shadow on the x-axis is

x-component = 88 · cosine(13°)

x-component = 88 · (0.9744)

x-component = 85.74

5 0

3 years ago

Read 2 more answers

Draw the vector C⃗ =1.5A⃗ −3B⃗ .

hammer [34]

If A is the measurement in the x-axis and B is the direction in the y-direction,

Magnitude = √(1.5² + (-3)²)
Magnitude = 3.35 units

Direction:
tan∅ = y/x
tan∅ = 3/1.5
∅ = 63.4°
Tan is negative in the second and fourth quadrants, and the values of x and y indicate that it is in the fourth quadrant. Therefore, the direction is 63.4° below the positive x-axis.

8 0

3 years ago

An electromagnetic wave with frequency 65.0Hz travels in an insulating magnetic material that has dielectric constant 3.64 and r

lakkis [162]

Answer:

The wavelength of the wave is $1.06\times10^6 m$

Explanation:

Lets calculate

We know an electromagnetic wave is propagating through an insulating magnetic material of dielectric constant K and relative permeability $K_m$ ,then the speed of the wave in this dielectric medium is $\nu$ is less than the speed of the light c and is given by a relation

$\nu=\frac{c}{\sqrt{KK_m} }$ --------- 1

In case the electromagnetic wave propagating through the insulating magnetic material , the amplitudes of electric and magnetic fields are related as -

$E_m_a_x= \nu B_m_a_x$

The magnitude of the 'time averaged value' of the pointing vector is called the intensity of the wave and is given by a relation

$I = S_a_v$

$\frac{E_m_a_xB_m_a_x}{2K_m\mu0}$ ----------- 3

now , we will find the speed of the propagation of an electromagnetic wave by using equation 1

$\nu=\frac{c}{\sqrt{KK_m} }$

Putting the values ,

= $\nu= \frac{3.00\times10^8}{\sqrt{(3.64)(5.18)} }$

= $0.6908\times10^8m/s$

= $6.91\times10^7m/s$

Now , using this above solution , we will find the wavelength of the wave -

$\lambda=\frac{\nu}{f}$

Putting the values from above equations -

$\frac{6.91\times10^7m/s}{65.0Hz}$

$\lambda= 1.06\times10^6 m$

Hence , the answer is $\lambda= 1.06\times10^6 m$

8 0

3 years ago

A variety of non-metal materials - fiberglass, Styrofoam, rubber -- are thermal insulators; that is, when there is a

Vitek1552 [10]

Answer: B.) High specific heat capacity

Explanation:

Thermal insulators are materials that are bad conductors of thermal energy.

On the other hand, the specific heat capacity of a material is defined as the amount of heat needed to raise the temperature of 1 kg of the material by 1K.

So:

If a material has a low specific heat capacity, it means that it takes a short time to absorb the heat, hence a temperature increase occurs shortly. These are excellent thermal conductors.

But if a material has high specific heat capacity, it will take longer to absorb heat and is therefore an excellent thermal insulator.

6 0

3 years ago