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ddd [48]
3 years ago
12

To determine a waves' frequency, you must know the

Physics
2 answers:
kykrilka [37]3 years ago
7 0
B. number of oscillations in a given period of time.
Lena [83]3 years ago
7 0

Answer : Frequency equals number of oscillations in a given period of time.

Explanation :

The number of oscillations in a given period of time is known as the frequency of the wave. It is denoted by \nu. Its SI unit is hertz (Hz).

It is also defined as the inverse of time period i.e.

\nu=\dfrac{1}{T}

T is the time period.

Hence, the correct option is (B) " number of oscillations in a given period of time ".

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A printer is connected to a 1.0 m cable. if the magnetic force is 9.1 × x10-5 n, and the magnetic field is 1.3 × 10-4 t, what is
Valentin [98]
The magnetic force on a current-carrying wire due to a magnetic field is given by
F=ILB
where
I is the current
L the wire length
B the magnetic field strength

In our problem, L=1.0 m, F=9.1 \cdot 10^{-5} N and B=1.3 \cdot 10^{-4}T, so we can re-arrange the formula to find the current in the wire:
I= \frac{F}{LB}= \frac{9.1 \cdot 10^{-5} N}{(1.0 m)(1.3 \cdot 10^{-4} T)} =0.7 A
5 0
3 years ago
Evaluate tan(249).<br> O A. 1.36<br> B. 0.45<br> C. 0.41<br> D. 0.91
vodomira [7]

Answer:

tan 249 = 2.61

tan 249 = tan (249 - 180) = tan 69 = 2.61

3 0
3 years ago
Which one of Newton's Laws fits this statement:
BabaBlast [244]

Answer:

First Law

Explanation:

I learned this in 6th grade

5 0
3 years ago
A merry go round (mass of 200kg and radius 5m) is rotating so that the outside edge is moving 10m/s. A giant bug of 6kd at a dis
romanna [79]

Answer:

2 rad/s

Explanation:

For a rotating object, the linear velocity is given by

v=\omega r

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\omega=\dfrac{v}{r}

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\omega=\dfrac{10 \text{ m/s}}{5 \text{ m}} = 2 \text{ rad/s}

8 0
3 years ago
When fireworks explode, sound and light are produced. These are examples of
ki77a [65]

Answer: Macroscoptic Output

Explanation:

Answers to the rest:

1. B) macroscopic outputs.

2.A) a microscopic change creating a macroscopic output

3.B) Because the energy levels of the electrons in different metals are usually not the same, different metals usually emit different colors of visible light.

4.A) Heat is applied to a solid, causing its molecules to move quickly.

5.A) strontium, sodium, copper, potassium

6 0
2 years ago
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