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sergij07 [2.7K]
3 years ago
5

A message is sent from the Galileo spacecraft orbiting Jupiter to earth at a distance of 928,000,000km. If it took the signal 51

.6 minutes to arrive, what is the calculated the speed of the signal in km/s?
Physics
2 answers:
expeople1 [14]3 years ago
6 0
<span>The answer would approximately be 299,741.60</span>
Blababa [14]3 years ago
6 0

speed of signal = 299742 km/s

Explanation:

V=\frac{d}{t}

d= distance=928,000,000 km

t= time=51.6 min= 51.6 (60)= 3096 s

so v= 928,000,000/3096

v=299742 km/s

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1. I drop a penny from the top of the tower at the front of Fort Collins High School and it takes 1.85 seconds to hit the ground
ladessa [460]

The acceleration of gravity on Earth is  9.8 m/s² .
The speed of a falling object keeps increasing smoothly,
in such a way that the speed is always 9.8 m/s faster than
it was one second earlier.

If you 'drop' the penny, then it starts out with zero speed. 
If you also start the clock at the same instant, then

         After  1.10 sec,  Speed = (1.10 x 9.8) = 10.78 meters/sec


         After  1.85 sec,  Speed = (1.85 x 9.8) = 18.13 meters/sec

But you want this second one given in a different unit of speed.
OK then:

     =  (18.13 meter/sec) x (3,600 sec/hr) x (1 mile/1609.344 meter)

     =    (18.13 x 3,600 / 1609.344)  (mile/hr)  =  40.56 mph  (rounded)

We did notice that in an apparent effort to make the question
sound more erudite and sophisticated, you decided to phrase
it in terms of 'velocity'.  We can answer it in those terms, if we
ASSUME that there is no wind, and the penny therefore doesn't
acquire any horizontal component of motion on its way down.

With that assumption in force, we are able to state unequivocally
and without fear of contradiction that each 'speed' described above ...
with the word 'downward' appended to it ... does become a 'velocity'.

3 0
3 years ago
Which formula gives the value of velocity ratio of wheel and axle?​
aleksandrvk [35]

Answer:

measurement of force amplification

8 0
3 years ago
For an unknown sample of the experiment, students measure 1679 counts when they first receive their sample and 1336 counts four
Tpy6a [65]

Answer:

Half life of the sample, t_{\frac{1}{2}} = 12.15 min

Given:

Initial amount, N = 1679

Final count of amount, N' = 1336

Time elapsed, t = 4 min = 240 s

Solution:

Now, To calculate the half life, using the relation:

N' = N(\frac{1}{2})^{\frac{t}{t_{\frac{1}{2}}}}

Now, substituting the given values in the above mentioned formula:

\frac{1336}{1679} = (\frac{1}{2})^{\frac{4}{t_{\frac{1}{2}}}}

0.796 = 0.5^{\frac{4}{t_{\frac{1}{2}}}}

Taking log on both the sides:

ln(0.796) = \frac{4}{t_{\frac{1}{2}}}ln(0.5)

0.329 = 4t_{\frac{1}{2}}

t_{\frac{1}{2}} = 12.15 min

6 0
3 years ago
A 0.14-kg baseball is moving at 41 m/s. A 0.058-kg tennis ball is moving at 67 m/s. Which of the two balls has higher kinetic en
lbvjy [14]

Answer:

The kinetic energy of tennis ball is higher than that of baseball.

Explanation:

mass of baseball m_{b} = 0.14 kg

velocity of baseball v_{b} = 41 m/s

mass of tennis ball m_{t}  = 0.058 kg

velocity of tennis ball v_{t}= 67 m/s

To find: the kinetic energy of baseball KE_{b} and tennis ball KE_{t}

We know that the kinetic energy is given by the equation,

KE = \frac{mv^{2}}{2}

the kinetic energy of baseball KE_{b} = \frac{m_{b}v_{b}  ^{2}}{2}

                                                           = \frac{0.14 * 41^{2}}{2}

                                                           = 117.67 J

the kinetic energy of tennis ball KE_{t} = \frac{m_{t}v_{t}  ^{2}}{2}

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                                                             = 130.181 J

Hence KE_{t} > KE_{b}, the kinetic energy of tennis ball is higher than that of baseball

6 0
3 years ago
15. If heat energy is decreased, the particles of a substance<br> and
astraxan [27]

Answer:

slow down and move closer together

Explanation:

hope this helps

8 0
3 years ago
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