4 years ago

Which statement describes Newton's law of universal gravitation?

Physics

1 answer:

Ray Of Light [21]4 years ago

8 0

Last one: Every object in the universe attracts every other object

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Ocean waves are traveling to the east at 3.2 m/s with a distance of 19 m between crests. (a) With what frequency do the waves hi

rjkz [21]

Answer:

(a) Frequency will be 0.168 Hz

(b) Frequency will be 0.0789 Hz

Explanation:

(a) We have given velocity of the ocean waves in east direction v = 3.2 m /sec

Distance between the crest $\Delta x=\lambda =19m$

We know that $v=\lambda f$

So $3.2=19\times f$

$f=0.168Hz$

(b)Velocity of the ocean waves in westward direction v = 1.5 m /sec

Distance between the crest $\Delta x=\lambda =19m$

We know that $v=\lambda f$

So $1.5=19\times f$

$f=0.0789Hz$

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4 years ago

Calculate the kinetic energy of a 4 kg object traveling at 16 m/s

melisa1 [442]

To work out kinetic energy, we use the following formula: KE = 0.5 x mv^2. So, 0.5 x 4 x 16^2 = 512 J

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3 years ago

Weight of an object various replaces on the earth.why?

german

Answer:

Weight change from place to place because it is a strong function of gravity. Recall that mass is universally constant. Hence weight varies becuas gravity varies. ... Other reason for variation of weight across the earth's surface are, rotation of the earth, altitude and local topography of the area.

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3 years ago

A step-up transformer has 50 turns on its primary coil and 2000 turns on its secondary

ryzh [129]

Answer:

Vs= 6000 v

Ip=9.6 A

Explanation:

Ns/Np = Vs/Vp

2000/50 = Vs/150

40 x 150 = Vs

Vs= 6000 v

Vs/Vp=Ip/Is

6000/150=Ip /0.24

Ip=9.6 A

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3 years ago

During a free fall Swati was accelerating at -9.8m/s2. After 120 seconds how far did she travel?

SIZIF [17.4K]

-70560, -9.8/2 = -4.9

120^2 = 14400.

Now you multiply 14400 * -4.9 = -70560m.

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4 years ago