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3 years ago

If your town issued an emergency flood warning,what steps would you take?

2 answers:

6 0

Make sure that your house wouldnt be affected by the flood, and if it is be cautious and always watch the news! It will be very informational on what is going on.

FrozenT [24]3 years ago

4 0

Answer:

Explanation:

Personally speaking I would gather all supplies completely necessary for my health. Things like water, food, solar powered flashlights, etc. You never know how long you will need to wait it out and whats to come next.

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Even at such low fractions of the speed of light these stars are moving quite quickly (thousands of kilometers a second) compare

yulyashka [42]

According to Doppler Effect, an observer at rest will perceive a shift in the wavelength or frequency of the radiation emitted by a source in movement.This shift is given by the formula:
$\frac{ \lambda - \lambda_{0} }{ \lambda_{0} } = \frac{-v}{c}$

where:
$\lambda$ = observed wavelength
$\lambda_{0}$ = wavelength at rest
v = speed of source (positive if towards the observer, negative if away from the observer)
c = speed of light

Therefore, we can solve for the observed wavelength:
$\lambda = \lambda_{0} (\frac{-v}{c}) + \lambda_{0} \\ \lambda = \lambda_{0} (1 - \frac{v}{c})$

Substituting the given data:
$\lambda = 656.46 (1 - \frac{300}{299792})$
= 655.80 nm

Hence, the observed wavelength of the line would be 655.80 nm. Note that this value is smaller than the one at rest, which means that we have a blue-shift, as expected for an approaching source.

5 0

3 years ago

A flea jumps by exerting a force of 1.09 ✕ 10−5 N straight down on the ground. A breeze blowing on the flea parallel to the grou

patriot [66]

Answer:

a= 17.877 m/s² : Magnitude of the acceleration of the flea

β = 88.21° : Direction of the acceleration of the flea

Explanation:

Conceptual analysis

We apply Newton's second law:

∑F = m*a (Formula 1)

∑F : algebraic sum of the forces in Newton (N)

m : mass in kilograms (kg)

a : acceleration in meters over second square (m/s²)

Problem development

Look at the flea free body diagram in the attached graphic

The acceleration is presented in the direction of the resultant force (R) applied over the flea .

$R= \sqrt{(F_{x})^{2} + (F_{y})^{2} }$

$R= \sqrt{(10.9)^{2}+(0.340)^{2} } *10^{-6} N$

R= 10.905*10⁻⁶ N

We apply the formula (1) to calculate the magnitude of the acceleration of the flea

∑F = m*a m = 6.1 * 10⁻⁷ kg

R = m*a

a= R/m

a= (10.905*10⁻⁶) / (6.1 * 10⁻⁷ )

a= 17.877 m/s²

β: Direction and magnitude of the acceleration of the flea

$\beta = tan^{-1} (\frac{F_{y} }{F_{x} } )$

$\beta = tan^{-1} (\frac{10.9*10^{-6} }{0.340*10^{-6} } )$

β = 88.21°

5 0

4 years ago

A boat travels north at a rate of 25.0 kilometers per hour (km/hr) relative to the current of the river. The current of the rive

USPshnik [31]

Answer:yes

Explanation:yes

4 0

3 years ago

How many turns of wire are needed in a circular coil 13 cmcm in diameter to produce an induced emf of 5.6 VV

Artemon [7]

Answer:

Number of turns of wire(N) = 3,036 turns (Approx)

Explanation:

Given:

Diameter = 13 Cm

emf = 5.6 v

Note:

The given question is incomplete, unknown information is as follow.

Magnetic field increases = 0.25 T in 1.8 (Second)

Find:

Number of turns of wire(N)

Computation:

radius (r) = 13 / 2 = 6.5 cm = 0.065 m

Area = πr²

Area = (22/7)(0.065)(0.065)

Area = 0.013278 m²

So,

emf = (N)(A)(dB / dt)

5.6 = (N)(0.013278)(0.25 / 1.8)

5.6 = (N)(0.013278)(0.1389)

N = 3,036.35899

Number of turns of wire(N) = 3,036 turns (Approx)

7 0

3 years ago

The thread around a screw is a lever.

monitta

It's a plain, not a lever

7 0

4 years ago

If your town issued an emergency flood warning,what steps would you take?​

If your town issued an emergency flood warning,what steps would you take?