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2 years ago

Help please!!!!!!!!!!

Physics

1 answer:

Juliette [100K]2 years ago

8 0

It's C because no mass is lost or gained in heating and also lava doesn't burn into smoke, like at all.

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A meteoroid is moving towards a planet. It has mass m = 0.78×109 kg and speed v1 = 4.1×107 m/s at distance R1 = 2.8×107 m from t

wariber [46]

Answer:

$PE=81.755\, J$

Explanation:

Given that:

mass of meteoroid, $m=7.8\times 10^8 \,kg$

radial distance from the center of the planet, $R= 2.8\times 10^7 m$

mass of the planet, $M=4.4\times 10^{25}\, kg$

<u>For gravitational potential energy we have:</u>

$PE=G\frac{M.m}{R}$

substituting the respective values:

$PE=6.67\times 10^{-11}\times \frac{4.4\times 10^{25}\times 7.8\times 10^8}{2.8\times 10^7}$

$PE=81.755\, J$

5 0

3 years ago

Calculate delta g for the reaction if the partial pressures of the initial mixture are pcl5 = .0029 atm, pcl3 = .27 atm, and pcl

AnnyKZ [126]

Answer: equation for the reaction is given below

PCL2+PCL3=PCL5

Where pcl2=0.40atm,pcl3=0.27atm

Pcl5=0.0029atm

Using ∆G=-RTin(PCL5/PCl2*PCL3)

Where R=8.314J/K/mol and T=298K

∆G=-8.314*298in(0.0029/0.40*.27)

∆G=8962.6J/mol

Explanation:

7 0

3 years ago

When the resistance in a circuit remains constant, how are the voltage and current related?

solmaris [256]

V=IR, therefore when resistance is constant the voltage and current are directly proportional

6 0

3 years ago

Read 2 more answers

You and your bicycle have combined mass 80.0 kg. When you reach the base of a bridge, you are travelling along the road at 7.50

Sonja [21]

We have that K.E and work done is

$K.E=-1890J$
$W=2186J$

From the Question we are told that

mass= 80.0 kg

Velocity= 7.50 m/s.

vertical distance of 5.20 m

Slowed to 3.00 m/s.

Generally the equation for Kinetic energy is mathematically given as

$K.E=\frac{mv^2}{2}-\frac{mv^2}{2}\\\\K.E=\frac{80*3^2}{2}-\frac{80*7.5^2}{2}$

$K.E=-1890J$

$P.E=mgh\\\\P.E=80*9.8*5.2\\\\P.E=4076$

Therefore

$W=4076-1890J$

$W=2186J$

For more information on this visit

brainly.com/question/12669551?referrer=searchResults

4 0

2 years ago

an airplane flies for 4 hours with a constant speed of 696 km/h and then for another 35 minutes with a constant sppeed of 936 km

Nastasia [14]

Answer:

Total distance covered by airplane is 3330 km

Explanation:

Distance covered in speed of v= 696 km /hr for t = 4 hours is

$x_{1}=v \times t\\x_{1}=696 \times 4\\x_{1}=2784 km$

Convert given speed in km/min, then distance covered in 35 minutes at speed of 936 km/hr is

$x_{2}=\frac{936}{60} \times 35\\x_{2}==546 km$

Total distance covered by airplane is

$x = x_{1}+x_{2}\\x =2784 +546\\x=3330 km$

Total distance covered by airplane is 3330 km

8 0

3 years ago