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1 year ago

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

Physics

1 answer:

Dvinal [7]1 year ago

7 0

Answer:

False

Explanation:

Because it is 60 hz

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Look at the picture of a person about to get the soccer ball. Then drag and drop the pins to correctly complete newtons second l

svlad2 [7]

Answer:

force

Explanation:

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6 0

3 years ago

A car runs along a horizontal path at speed of 20m/s.The driver observes the rain hitting his car at 60 to vertical.If rain is a

Mama L [17]

Answer:

The speed of the raindrop is 11.55 m/s.

Explanation:

We need to find the speed of the rain in the "y" direction. We have:

$v_{r}$ : speed of the raindrop at 60° (vertical) =?

$v_{c}$ : speed of the car = 20 m/s (in the "x" direction)

Hence, the speed of the car and the speed of the raindrop are related by:

$tan(\theta) = \frac{v_{c}}{v_{r}}$

$v_{r} = \frac{v_{c}}{tan(60)} = \frac{20}{tan(60)} = 11.55 m/s$

Therefore, the speed of the raindrop is 11.55 m/s.

I hope it helps you!

7 0

3 years ago

Find the frequency of light emitted in the transition from the 148th orbit to the 139th orbit. Find the frequency of light absor

Romashka-Z-Leto [24]

Answer:

$f=3\times 10^8\times 64.90=19.4\times 10^9 s^{-1}$

$f=3\times 10^8\times39.9537=119.8613\times 10^8\ /sec$

Explanation:

for the transition from 148th orbit to 138th orbit

we know the formula

$\frac{1}{\lambda }=R\times \left ( \frac{1}{n^2_{final}}-\frac{1}{n^2_{initial}} \right )$

where R is Rydberg constant whose value is $1.0974\times 10^7 /m$

putting this value in equation

$\frac{1}{\lambda }=1.0974\times 10^7 \left ( \frac{1}{139^2}-\frac{1}{148^2} \right )$

$\frac{1}{\lambda }=64.9075$

$f=c\lambda$

$f=3\times 10^8\times 64.90=19.4\times 10^9 s^{-1}$

for the transition from 165th to 174th orbit

we know the formula

$\frac{1}{\lambda }=R\times \left ( \frac{1}{n^2_{final}}-\frac{1}{n^2_{initial}} \right )$

where R is Rydberg constant whose value is $1.0974\times 10^7 /m$

putting this value in equation

$\frac{1}{\lambda }=1.0974\times 10^7 \left ( \frac{1}{165^2}-\frac{1}{174^2} \right )$

$\frac{1}{\lambda }=39.95377$

$f=c\lambda$

$f=3\times 10^8\times39.9537=119.8613\times 10^8\ /sec$

8 0

3 years ago

Studies have shown that viewing violent actions in the media __________ the inhibition against performing those actions, especia

Airida [17]

Answer:

Decreases

Explanation:

4 0

3 years ago

Read 2 more answers

What do borrowers use to secure a mortgage loan? Check all that apply.

Musya8 [376]

Answer:

a house or a land is used to secure a mortgage loan

5 0

2 years ago