2 years ago

. While at the dentist’s office, Marion noticed the x-ray images of her teeth looked very

Physics

1 answer:

kkurt [141]2 years ago

7 0

Answer:

Explanation:

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Which of following is typical stored energy used to power todays vehicles?

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Electrical energy.................

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3 years ago

How many paths through which charge can flow would be shown in the circuit diagram of a series circuit?

Natalka [10]

A) one ... same current passes through each cpt

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2 years ago

A boy is whirling a stone around his head by means of a string. The string makes one complete revolution every second, and the t

slega [8]

Answer:

The tension increases to four times its original value.

Explanation:

v = Velocity

r = Radius

m = Mass of stone

The centripetal force is

$F_c=m\dfrac{v^2}{r}$

The tension will balance the centripetal force

$T=m\dfrac{v^2}{r}$

$\\\Rightarrow T\propto v^2$

$\dfrac{T_1}{T_2}=\dfrac{v_1^2}{v_2^2}\\\Rightarrow \dfrac{T_1}{T_2}=\dfrac{v_1}{2^2v_1^2}\\\Rightarrow \dfrac{T_1}{T_2}=\dfrac{1}{4}\\\Rightarrow T_2=4T_1$

The new tension will be 4 times the old tension

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2 years ago

A wave with a frequency of 17 Hz has a wavelength of 4 meters. At what speed (in m/s) will this wave travel?

Molodets [167]

Answer:68m/s

Explanation:

Frequency=17Hz

Wavelength=4metre

Wave speed=frequency x wavelength

Wave speed =17 x 4

Wave speed =68m/s

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2 years ago

The magnitude of a vector can never be less than the magnitude of one of its components. Group of answer choices True False

pogonyaev

Answer:

True

Explanation:

As the formula for magnitude of a vector v and their components $v_1, v_2, v_3, v_4,..., v_n$ is

$v^2 = v_1^2 + v_2^2 + ... +v_n^2$

Since $v_1^2, v_2^2, v_3^2, v_4^2,..., v_n^2 \geq 0$ , this means the sum of them, $v^2$ , is always greater or equal to $v_1^2, v_2^2, v_3^2, v_4^2,..., v_n^2$

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2 years ago