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4 years ago

13

As an astronaut travels from the surface of Earth to a position that is four times as far away from the center of Earth, based o

n the Law of Gravity which of the following statement is true?

1 answer:

nirvana33 [79]4 years ago

3 0

Answer:

Yes

Explanation:

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A hot air balloon is filled with 1.37 × 106 l of an ideal gas on a cool morning (11 °c. the air is heated to 117 °c. what is the

hjlf

So according to Charles's law the volume of a gas is directly proportional to the absorbed absolute temperature assuming constant pressure and a closed system. Or V/T=constant.
(V1/T1)=(V2/T2). Absolute temperature is in degrees Kelvin so:

T1=273.15+11= 284.15 K and T2=273.15 + 117=390.15 K. V1= 1.37*10^6 L.

We need to find V2. V2= (V1/T1)*T2.

Now we plug in the numbers: V2=(1.37*10^6/284.15)*390.15=1881068.1 L.
The volume of the air balloon when we heat the gas inside is
V2=1.88*10^6 L.

8 0

4 years ago

Read 2 more answers

Mario, a hockey player, is skating due south at a speed of 4.79 m/s relative to the ice. A teammate passes the puck to him. The

frez [133]

Mario's velocity vector relative to the ice is

$\vec v_{M/I}=-4.79\,\vec\jmath$

(note that all velocities mentioned here are given in m/s)

The puck is moving in a direction of 17.8 degrees west of south, or 252.2 degrees counterclockwise relative to east. Its velocity vector relative to the ice is then

$\vec v_{P/I}=9.13(\cos252.2^\circ\,\vec\imath+\sin252.2^\circ\,\vec\jmath)=-2.79\,\vec\imath-8.69\,\vec\jmath$

The velocity of the puch relative to Mario is

$\vec v_{P/M}=\vec v_{P/I}+\vec v_{I/M}=\vec v_{P/I}-\vec v_{M/I}$

$\vec v_{P/M}=-2.79\,\vec\imath-3.90\,\vec\jmath$

Then, relative to Mario,

a. the puck is traveling at a speed of $\boxed{\|\vec v_{P/M}\|=4.80}$ , and

b. is moving in a direction $\theta$ such that

$\tan\theta=\dfrac{-3.90}{4.80}\implies\theta=-126^\circ$

which is about $\boxed{35.6^\circ}$ west of south.

5 0

3 years ago

For a force to be balanced, its net force must be __________ N.

Nookie1986 [14]

Answer:

equal

......,.............

........,...

4 0

3 years ago

Hi i can i have some help

Ymorist [56]

Answer:

The temperature-time diagram is attached below

When ethanol is heating -120°C, its temperature rises till -114°C. Then the temperature remains constants at -114°C° till all of the ethanol is converted from Solid to Liquid. After that the temperature starts to rise again till 78°C. Then the temperature remains constants till all the liquid is converted into gas.

The slopes depends on rate of heating and specific heat capacity of ethanol.

The plateaus depend on rate of heating and latent heat of fusion and latent heat of vaporization.

4 0

3 years ago

A skateboarder traveling at 4.45 m/s can be stopped by a strong force in 1.82 s and by a weak force in 5.34 s. The mass of the s

Alex Ar [27]

Answer:

Explanation:

The relation between momentum "P" and impulse "I " is given by the impulse momentum theorem given below,

i.e. impulse is equal to change in momentum.

I= ∆P= P₂ - P₁

F∆t=mv₂ - mv₁

here m is the mass of skateboarder= m= 53.6 kg

initial velocity v₁ = 4.45m/s

final velocity v₂ = 0

now impulse is

I =0 - 53.6 x 4.45 = -235.52 kgm/s

here the final momentum is zero as the final velocity is zero and the initial momentum P₁= mv₁ = 235.52kgm/s

now the strong force that is applied for 1.82 seconds can be calculated as

F= - I / t

F = - 235.52/ 1.82 = - 131 N

in second step the weak force that is applied for 5.34 s can be calculated as

F = - I / t = - 235.52 / 5.34 = - 44.6 N

the negative sign of impulse and applied force indicates that the force is opposite to the direction of motion of the skateboarder.

4 0

3 years ago