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3 years ago

Velocity is a description of an object’s blank

Physics

2 answers:

anzhelika [568]3 years ago

8 0

Velocity is the description of an object's motion from one point to another.

It tells the speed with which the trip is completed, and the direction from the start-point to the end-point. It tells nothing about any twists, turns, loops, bends, or stops along the way.

Alisiya [41]3 years ago

3 0

Change in displacement per unit of time (Ex. 25m/s East)

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Explain:<br><br> What is the relationship between the solar system and the Milky Way?

Black_prince [1.1K]

Answer:

Solar system is a part of Milkyway Galaxy.

Explanation:

Mikyway is a Galaxy or we can compare it with a family of many members (collectively) ane Solar system is a part of mikyway galaxy or we can compare it with a member of the family!

3 0

3 years ago

Read 2 more answers

A projectile is fired vertically from Earth's surface with

scoray [572]

Answer:

$h=25.52\times10^6 m$

Explanation:

Initial speed, v = 10 x 10^3 m/s

Mass of the earth, M = 6 x 10^24 kg

Radius of the earth, R = 6.4 x 10^6 m

Maximum from the surface of earth, h = ?

Let m = Mass of the projectile

Solution:

Potential energy at maximum height = ( Potential + Kinetic energy ) at the surface

$-G M m / ( R + h )=- G M m / R + (1/2) m v^2$

$- G M / ( R + h ) = - G M / R + (1/2) v^2$

$-2\times G M / ( R + h ) = ( - 2 G M / R ) + v^2$

$-2\times6.67\times10^{-11}\times6\times10^{24}/ ( R + h )$

= $( (- 2\times 6.67\times10^{-11}\times6\times10^{24}) /(6.4\times10^6)} +10000^2$

= $-2.50625\times10^7 J$

$=- 8\times10^{14} / ( R + h )=-2.50625\times 10^7$

$R+h=31.92\times10^{6}$

$h=31.92\times10^{6}-6.4\times10^6$

$h=25.52\times10^6 m$

5 0

3 years ago

45. What is the wovelength of a 30. Hertz periodic

Leviafan [203]

The wavelength is 2m.

Hence, Option c) 2m is the correct answer

Given that;

Frequency; $f = 30Hz$

Speed; $v = 60m/s$

Wavelength; $\lambda =\ ?$

using the expression for the relations between wavelength, frequency and speed of wave:

$\lambda = \frac{v}{f}$

Where $\lambda$ is wavelength, f is frequency and v is speed.

We substitute our given values into the equation

$\lambda = \frac{60m/s}{30Hz}\\\\\lambda = \frac{60m/s}{30s^{-1}}\\\\\lambda = 2m$

The wavelength is 2m.

Hence, Option c) 2m is the correct answer.

To learn more about wavelength, click here: brainly.com/question/1347107

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2 years ago

2. A car accelerates down the road. What is the "reaction" to the tires pushing on the road?

Artist 52 [7]

The answer would be friction

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2 years ago

Which of the following results when a crest and trough meet?

kifflom [539]

D. Destructive interference. An easy way to think about it is the waves are opposite each other, so they essentially cancel each other out, or make an effort to.

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3 years ago