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3 years ago

True or false An object that is not accelerating or decelerating has zero net force acting in it.

Physics

1 answer:

Rashid [163]3 years ago

6 0

False, gravity is always acting on any object

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Find the density of a substance that has a volume of 754 cm3 and a mass of 7,917 grams. Don't forget your units!

Anit [1.1K]

Answer:

$\boxed{\sf Density \ of \ the \ substance = 10.5 \ g/cm^3}$

Given:

Mass (M) = 7917 grams

Volume (V)= 754 cm³

To Find:

Density of the substance

Explanation:

$\boxed{ \bold{\sf Density \ (\rho) = \frac{Mass \: (M)}{Volume \: (V)}}}$

Substituting values of M & V in the equation:

$\sf \implies \rho = \frac{7917}{754}$

$\sf \implies \rho = 10.5 \: g/ {cm}^{3}$

3 0

4 years ago

Suppose that a comet has a very eccentric orbit that brings it quite close to the Sun at closest approach (perihelion) and beyon

Nutka1998 [239]

Answer:

16.63min

Explanation:

The question is about the period of the comet in its orbit.

To find the period you can use one of the Kepler's law:

$T^2=\frac{4\pi}{GM}r^3$

T: period

G: Cavendish constant = 6.67*10^-11 Nm^2 kg^2

r: average distance = 1UA = 1.5*10^11m

M: mass of the sun = 1.99*10^30 kg

By replacing you obtain:

$T=\sqrt{\frac{4\pi}{GM}r^3}=\sqrt{\frac{4\pi^2}{(6.67*10^{-11}Nm^2/kg^2)(1.99*10^{30}kg)}(1.496*10^8m)^3}\\\\T=997.9s\approx16.63min$

the comet takes around 16.63min

8 0

3 years ago

The distance of motion, or displacement, along a fault during an earthquake is known as:

k0ka [10]

<span>A fault slip is the distance of motion, or displacement, along a fault during an earthquake. They can be classified by their relation to the horizontal, for example, if the fault slip happens primarily vertically it is a dip slip.</span>

8 0

3 years ago

Amy walks 32 m right and then 12 m left. She turns and walks another 28 m right and then turns and walks 7 m left. What is Amy's

Karo-lina-s [1.5K]

Her displacement is 41m. First, she walks 32m to the right, then 12m to the left. I subtract 12 from 32 to get 20m. She walks 28m to the right. Add 28 to 20 and you get 48. Finally, she walks 7m to the left. Subtract 7, then you get 41m.

4 0

4 years ago

Sodium undergoes beta decay and becomes magnesium, write an equation. please help...

Tatiana [17]

Remark

There are 2 kinds of Beta Decay. This one is an example of a neutron becomes a proton and the emitted particle is an electron.

$_{11}^{23}\text{Na}\longrightarrow_{12}^{23}\text{Mg}+_{-1}^{ 0}\text{1e-}$

6 0

3 years ago