2 years ago

An alternating current of 60hz changes direction 100 times per second.

Physics

1 answer:

Dvinal [7]2 years ago

7 0

Answer:

False

Explanation:

Because it is 60 hz

You might be interested in

A wooden block with mass 1.60 kg is placed against a compressed spring at the bottom of a slope inclined at an angle of 30.0° (p

andreyandreev [35.5K]

Answer:

The amount of potential energy that was initially stored in the spring is 88.8 J.

Explanation:

Given that,

Mass of block = 1.60 kg

Angle = 30.0°

Distance = 6.55 m

Speed = 7.50 m/s

Coefficient of kinetic friction = 0.50

We need to calculate the amount of potential energy

Using formula of conservation of energy between point A and B

$U_{A}+k_{A}+w_{A}=U_{B}+k_{B}$

$U_{A}+0-fd=mgy+\dfrac{1}{2}mv^2$

$U_{A}=\mu mg\cos\theta\times d+mg h\sin\theta+\dfrac{1}{2}mv^2$

Put the value into the formula

$U_{A}=0.50\times1.60\times9.8\cos30\times6.55+1.60\times9.8\times6.55\sin30+\dfrac{1}{2}\times1.60\times(7.50)^2$

$U_{A}=88.8\ J$

Hence, The amount of potential energy that was initially stored in the spring is 88.8 J.

7 0

3 years ago

The amount of energy transported by a wave is most closely related to the wavelength of the wave. True or False?

Artemon [7]

I think its false............ Im pretty sure

3 0

3 years ago

Read 2 more answers

which element is less reactive, an element whose atoms have seven valence electrons or an element whose atoms have eight valence

Agata [3.3K]

Which element is less reactive, an element whose atoms have seven valence electrons or an element whose atoms have eight valence electrons? Why?<span>an element with 8 valence electrons because it doesn't require any additional electrons to become stable</span>

5 0

3 years ago

Which is a possible result of higher air temperatures caused by global warming?

atroni [7]

Answer: C. rapid evaporation of water in the soil :)

6 0

3 years ago

Read 2 more answers

Assume that two cars have the same kinetic energy, but that the red car has twice the speed of the blue car. We then know that t

Anna71 [15]

Answer:

equal