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3 years ago

Sound travels at a speed of 1188 km in one hour. How many meters will it travel in one second?

Physics

2 answers:

Nana76 [90]3 years ago

7 0

The answer to this question would be 330 m/sec

Darya [45]3 years ago

7 0

Answer: 330 m

Explanation:

Do some unit conversion.

$\frac{1188 km}{1 hr} *\frac{1 hr}{3600 s} \\$ = 0.33 km/s.

So in 1 second, it will travel 0.330 km, or 330 m.

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An athlete whose mass is 97.0 kg kg is performing weight-lifting exercises. Starting from the rest position, he lifts, with cons

SIZIF [17.4K]

Answer:

470 N.

Explanation:

Using equations of motion:

S = vi*t + 1/2*(a*(t^2))

Given:

S = 0.65 m

t = 1.5 s

vi = 0 m/s

0.65 = 1/2 * (a * (1.5)^2)

a = 1.3/2.25

= 0.578 m/s^2

Force = mass * acceleration due to gravity

= 92 * 0.578

= 53.16 N

Total force = 420 + 53.16

= 473.16 N

= 470 N.

6 0

3 years ago

In the Hydrogen atom, the energy spacing between the is 4.07 x 101 J (Joules). When an is the frequency of the photons emitted?

agasfer [191]

Answer:

The frequency of the photon is $3.069\times10^{14}\ Hz$ .

Explanation:

Given that,

Energy $E=4.07\times10^{-19}\ J$

We need to calculate the energy

Using relation of energy

$E_{4}-E_{2}=\Delta E$

Where, $\Delta E$ = energy spacing

$4h\nu-2h\nu=4.07\times10^{-19}$

$\nu=\dfrac{4.07\times10^{-19}}{2h}$

Put the value of h into the formula

$\nu=\dfrac{4.07\times10^{-19}}{2\times6.63\times10^{-34}}$

$\nu=3.069\times10^{14}\ Hz$

Hence, The frequency of the photon is $3.069\times10^{14}\ Hz$ .

4 0

3 years ago

Carbon dioxide can be represented by the chemical formula

Vitek1552 [10]

Answer:

Your answer is B co2

Explanation:

8 0

3 years ago

Read 2 more answers

How many type of expansion physic

Yuki888 [10]

Answer:

Three types of thermal expansion are linear expansion,s superficial expansion,cubical expansion

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3 years ago

HELP DUE TODAY BEST ANSWER GET BRAINLIE

Aleonysh [2.5K]

I uploaded the answer to a file hosting. Here's link:

tinyurl.com/wpazsebu

3 0

3 years ago