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Arada [10]
4 years ago
12

A gas expands from an initial volume of 0.040 m^3 and an initial pressure of 210 kPa to a final volume of 0.065 m^3 while its te

mperature is kept constant. How much work is done by the system?
Physics
1 answer:
USPshnik [31]4 years ago
7 0

Answer:

286

Explanation:

p1v1/T1=p2v2/T2

then subtitude your values

T2=760*0.65*273/210*0.040

T2=135/8.4=16+273=289

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Two particles with positive charges q1 and q2 are separated by a distance s. Part A Along the line connecting the two charges, a
liraira [26]

Answer:

x=s*\frac{q_{1} +-\sqrt{q_{1}q_{2}}}{q_{1}-q_{2}}

we choose the sign, in order to x<s

Explanation:

x=distance from q1

E_{1} =E_{2}

k*q_{1}/x^{2}=k*q_{2}/(s-x)^2}

q_{1}*(s^{2}-2sx+x^{2})-q_{2}x^{2}=0

(q_{1}-q_{2})x^{2}-2sq_{1}x+q_{1}*s^{2}=0

this is a quadratic equation:

x=\frac{-b+-\sqrt{b^{2}-4ac} }{2a}=\frac{2sq_{1} +-\sqrt{(-2sq_{1})^{2}-4(q_{1}-q_{2})q_{1}s^{2}}} {2(q_{1}-q_{2})}

x=s*\frac{q_{1} +-\sqrt{q_{1}q_{2}}}{q_{1}-q_{2}}

4 0
4 years ago
Mars rotates on its axis once every 1.02 days (almost the same as Earth does). (a) Find the distance from Mars at which a satell
Virty [35]

Answer:

r= 2.03*10^7m

V = 1.45x10^3 m/s

Explanation:

number of days in sec = 1.02days * 86400s = 88128 s              

Mass of Mars is 6.42*10^23 Kg

gravitational constant G = 6.674*10^{-11}

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

\frac {88128^2}{(9.22*10^{-13})} = r^3

r= 2.03*10^7m

(b) V=\frac{2 \pi*r}{T}

V=\frac{(2 \pi(2.03*10^7))}{(88128)} = 1.45x10^3 m/s

V

4 0
4 years ago
How much kinetic energy does Bryan have?
denpristay [2]
Bryan? NEED INFO, GIVE ME MOOOOOAR
6 0
4 years ago
A snowboarder starts from rest at the top of a slope. They accelerate to 35 m/s over 9 seconds. What is their acceleration?
leonid [27]
  • a=v-u/t

v=35m/s

t=9

  • a=35/9
  • a=3.88m/s²
4 0
3 years ago
PLEASE ANSWER NEED HELP!!!!!!!! PLEASE THE CORRECT ANSWER!!!!!!
In-s [12.5K]

Answer:

I'm no expert, but multitasking is a no bueno. Because multitasking reduces your efficiency and performance because your brain can only focus on one thing at a time. When you try to do two things at once, your brain lacks the capacity to perform both tasks successfully.

Therefore I would choose A, considering he could easily workout another time, whilst the test is a one time thing. He can't redo the test, but he can workout again. So my answer is A.

If he HAS to workout and study at the same time, then C would be appropriate.

I hope this helps!

5 0
3 years ago
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