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3 years ago

When an object reflects all the light waves that strike it looks white or black?

Physics

1 answer:

egoroff_w [7]3 years ago

3 0

Light waves can be from any color, depends on what it is bouncing no or reflecting off of.

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A baseball pitcher throws a ball at 40.0 m/s towards home plate. The ball is thrown horizontally. How far will it drop on its wa

Finger [1]

Answer:

0.992 m

Explanation:

x = (horizontal vi)t + (1/2)at²

18 = (40)t + 0

t = 0.45 s

y = (vertical vi)t + (1/2)gt²

y = 0 + (1/2)(9.8)(0.45)²

y = 0.992 m

7 0

3 years ago

How does the tide cycle affect erosion along a sea coast?

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<span>The tides are a constant pulling and pushing against the land. Causing erosion.</span>

4 0

3 years ago

Which equation would you use to solve the following problem? An object is moved 29 m with a force of 289 N. What is the work don

Ksivusya [100]

Work, scientifically speaking, is done when a force is applied to an object which consequently moves the object at a certain direction. Work in formula, is force multiplied with distance.
W = F x d

4 0

3 years ago

A 30.0-Î¼F capacitor is connected to a 49.0-Î© resistor and a generator whose rms output is 30.0 V at 60.0 Hz. (a) Find the rms

Natali5045456 [20]

Explanation:

Given that,

Capacitor = 30μC

Resistor = 49.0Ω

Voltage = 30.0 V

Frequency = 60.0 Hz

We need to calculate the impedance

Using formula of impedance

$Z=\sqrt{R^2+X_{c}^2}$ .....(I)

We need to calculate the value of $X_{c}$

Using formula of $X_{c}$

$X_{c}=\dfrac{1}{2\pi f c}$

$X_{c}=\dfrac{1}{2\times\pi\times60.0\times30\times10^{-6}}$

$X_{c}=88.42\ \Omega$

Put the value of $X_{c}$ into the formula of impedance

$Z=\sqrt{(49.0)^2+(88.42)^2}$

$Z=101.08\ \Omega$

(a). We need to calculate the rms current in the circuit

Using formula of rms current

$I_{rms}=\dfrac{V}{Z}$

$I_{rms}=\dfrac{30.0}{101.08}$

$I_{rms}=0.30\ A$

The rms current in the circuit is 0.30 A.

(b). We need to calculate the rms voltage drop across the resistor

Using formula of rms voltage

$V_{rms}=I_{rms}\times R$

Put the value into the formula

$V_{rms}=0.30\times49.0$

$V_{rms}=14.7\ V$

The rms voltage drop across the resistor is 14.7 V

(c). We need to calculate the rms voltage drop across the capacitor

Using formula of rms voltage

$V_{rms}=I_{rms}\times X_{C}$

$V_{rms}=0.30\times88.42$

$V_{rms}=26.53\ V$

The rms voltage drop across the capacitor is 26.53 V.

Hence, This is the required solution.

4 0

3 years ago

Two sound waves are traveling through the same medium. They have the same amplitude, wavelength, and direction of travel. If the

Sloan [31]

Answer:

Constructive interference

Explanation:

Here, the medium is same, same wavelength, same frequency, same amplitude and same direction of propagation.

Let the intensity of waves be I which is same for both

The formula for the net intensity is

$I^{2}=I_{1}^{2}+I_{2}^{2}+2I_{1}I_{2}Cos\phi$

where, Ф be the phase difference

So, $I_{R}^{2}=I^{2}+I^{2}+2IICos6\pi$

Here, IR is maximum so the interference is constructive in nature.

7 0

4 years ago