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2 years ago

Please Help with this ASAP: A wave vibrates 45 times in 30 seconds, calculate its frequency

Physics

2 answers:

JulijaS [17]2 years ago

4 0

Th answer would be 1.5

11111nata11111 [884]2 years ago

3 0

It’s gonna be 45/30 which is equal to 9/6=1.5

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The environment contains

Alchen [17]

It might help if this is in the biology area but i'll answer anyways. Your answer is C. Every environment has living and nonliving things. Tree, plants, animals, grass, tree bark, water, etc.

8 0

2 years ago

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If it takes you 5 minutes to dry your hair using a 1200-W hairdryer plugged into a 120-V power outlet, how many Coulombs of char

Kazeer [188]

Answer:

The charge pass through your hair dryer is 3000 C.

Explanation:

Given that,

Power = 1200 W

Voltage = 120 V

Flow time = 5 min

We need to calculate the current

Using formula of power

$P=VI$

$I=\dfrac{P}{V}$

Put the value into the formula

$I=\dfrac{1200}{120}$

$I=10\ A$

We need to calculate the charge pass through your hair dryer

Using formula of current

$I=\dfrac{Q}{t}$

$Q=It$

Put the value into the formula

$Q=10\times5\times60$

$Q=3000\ C$

Hence, The charge pass through your hair dryer is 3000 C.

7 0

2 years ago

What is the speed of a wave with a wavelength of 3.0 m and a period of 0.40 s?

Zolol [24]

The formula you need for this is
v = f λ
(velocity = frequency • wavelength)
A built-in reminder for this relationship is the units:
meters / second = meters • 1/seconds (aka hz, frequency)
therefore v = 3m / 0.4 seconds = 7.5 m/s

8 0

2 years ago

Is friction slowed objects down True or False

yan [13]

Answer: Yes

Explanation:

7 0

2 years ago

For your science fair project you need to design a diffraction grating that will disperse the visible spectrum (400-700 nm) over

elixir [45]

Answer:

Explanation:

If d be the distance between two lines , for bright fringe in first order

d sinθ = λ

700 nm must be positioned at 30⁰

d sin30 = 700 x 10⁻⁹

d = 7 x 10⁻⁷ / .5

= 14 x 10⁻⁷

no of lines per m

1/ 14 x 10⁷

= 7.14 x 10⁵

3 0

2 years ago