3 years ago

Explain why an electromagnetic wave is a transverse was and not a compressional wave

1 answer:

4 0

Electromagnetic waves are transverse because the particles that are moving are perpendicular to the wave motion while compressional (also known as longitudinal) wave particles move parallel to the wave motion

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A quantity of N2 occupies a volume of 1.4 L at 290 K and 1.0 atm. The gas expands to a volume of 3.3 L as the result of a change

lions [1.4K]

Answer:

$\rho = 0.50 g/L$

Explanation:

As we know that

PV = nRT

here we have

$P = 1.0 atm$

$P = 1.013 \times 10^5 Pa$

so we have

$V = 1.4 \times 10^{-3} m^3$

T = 290 K

now we have

$(1.013 \times 10^5)(1.4 \times 10^{-3}) = n(8.31)(290)$

$n = 0.06$

now the mass of gas is given as

$m = n M$

$m = (0.06)(28)$

$m = 1.65 g$

now density of gas when its volume is increased to 3.3 L

so we will have

$\rho = \frac{m}{V}$

$\rho = \frac{1.65 g}{3.3 L}$

$\rho = 0.50 g/L$

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3 years ago

When you take your 1900-kg car out for a spin, you go around a corner of radius 53m with a speed of 13m/s. The coefficient of st

anastassius [24]

Answer:

Ff = 6058.5N

Explanation:

The sum of forces is:

$Ff = m*a_c$

$Ff = m*V^2/R$

$Ff = 1900*13^2/53$

$Ff = 6058.5N$

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3 years ago

If the masses of objects increase and their distance from each other remains the same, then the force of gravity between the two

skelet666 [1.2K]

Answer:

the formula for the force of gravity depends inversely of the distance and directly of the masses.

$F_{G} =G\frac{M_{1} M_{2}}{R^{2}}$

This means that if the masses increase and their distance remains the same the force will increase proportionally.

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4 years ago

5 uses of mechanical energy

Oksi-84 [34.3K]

Answer: The 5 uses of mechanical energy are: 1) Hammering a nail

2) Using Dart gun 3) Moon 4) Hydropower plant 5) Sharping a pencil.

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3 years ago

Vector ~A has a magnitude of 29 units and points in the positive y-direction. When vector ~B is added to ~A, the resultant vecto

timurjin [86]

Answer:

The magnitude of vector B is 43 units and it points in the negative y-direction.

Explanation:

Resultant of vectors = vector sum of all the vectors

Vector A = 29j

Vector B = ?

Resultant of vector A and B = R = -14j

R = A + B

-14j = 29j + B

B = -14j - 29j = - 43j

Hence, the magnitude of vector B is 43 units and it points in the negative y-direction.

4 0

3 years ago