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3 years ago

Whenever an object is moving at a constant rate, the value(s) that equal zero is (are):

Physics

2 answers:

dolphi86 [110]3 years ago

5 0

Answer:

d) all of the above

Explanation:

the speed, velocity, and acceleration all changes to 0 due to no motion.

Xelga [282]3 years ago

3 0

Whenever an object is moving at a constant rate . . .

a). its speed is that constant rate.

b). Its <em>acceleration MAY BE zero</em>, if it's also moving in a straight line.

c). Its velocity is that constant rate if it's moving in a straight line. Otherwise, its velocity could have many different values, depending on the path it's following.

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Planets are not uniform inside. Normally, they are densest at the center and have decreasing density outward toward the surface.

SSSSS [86.1K]

Answer:

a = 9.94 m/s²

Explanation:

given,

density at center= 1.6 x 10⁴ kg/m³

density at the surface = 2100 Kg/m³

volume mass density as function of distance

$\rho(r) = ar^2 - br^3$

r is the radius of the spherical shell

dr is the thickness

volume of shell

$dV = 4 \pi r^2 dr$

mass of shell

$dM = \rho(r)dV$

$\rho = \rho_0 - br$

now,

$dM = (\rho_0 - br)(4 \pi r^2)dr$

integrating both side

$M = \int_0^{R} (\rho_0 - br)(4 \pi r^2)dr$

$M = \dfrac{4\pi}{3}R^3\rho_0 - \pi R^4(\dfrac{\rho_0-\rho}{R})$

$M = \pi R^3(\dfrac{\rho_0}{3}+\rho)$

we know,

$a = \dfrac{GM}{R^2}$

$a = \dfrac{G( \pi R^3(\dfrac{\rho_0}{3}+\rho))}{R^2}$

$a =\pi RG(\dfrac{\rho_0}{3}+\rho)$

$a =\pi (6.674\times 10^{-11}\times 6.38 \times 10^6)(\dfrac{1.60\times 10^4}{3}+2.1\times 10^3)$

a = 9.94 m/s²

7 0

3 years ago

If a bowl of fruit is sitting on a table in a state of rest, what is the net force acting on it?

Setler79 [48]

A balanced force is upon it because balanced means both sides are equal so they cancel each other out, while unbalanced means one side is weaker/stronger than the other and in this case its in a state of rest so the net force would be equal/balanced.

8 0

3 years ago

Read 2 more answers

A particle could have a charge of

tekilochka [14]

The correct answer is
<span> (3) 3.2 × 10^−19 C

In fact, electric charge is quantized: the elementary charge is the charge of the electron, </span> $e=1.6 \cdot 10^{-19} C$ , and every particle can only have an electric charge which is an integer multiple of this value. Of the options listed above, only option (3) is an integer multiple of the elementary charge: in fact, it corresponds to 2 times the electron charge:
$2e=2 \cdot 1.6 \cdot 10^{-19} C=3.2 \cdot 10^{-19} C$

7 0

3 years ago

A Car is moving at a speed of 20 m/s. How Much Distance it will cover in 1 min? Express the answer in km.

natita [175]

Answer:

d=20m/sx60s=1200m=1200/1000Km=1.2km

Explanation:

8 0

2 years ago

What do the spheres in the model represent

Sophie [7]

Answer: no

Explanation: we need a picture

4 0

3 years ago

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