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tia_tia [17]
2 years ago
12

Describe the conversions from potential to kinetic energy, or kinetic to potential energy, as a toy car rolls down a ramp.

Chemistry
1 answer:
DiKsa [7]2 years ago
4 0

Answer:

When an object falls, its gravitational potential energy is changed to kinetic energy. You can use this relationship to calculate the speed of the object's descent. Gravitational potential energy for a mass m at height h near the surface of the Earth is mgh more than the potential energy would be at height 0.

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Which of the following observations indicates that an object is falling at terminal velocity?
spayn [35]
I believe that's is answer C because your ask about and increasment on the velocity in this observation
7 0
3 years ago
Calcium + zinc nitrate ------->
Snezhnost [94]

Answer:

c

Explanation:

there will be displacement reaction taking place

8 0
3 years ago
Read 2 more answers
At an elevated temperature, Kp=4.2 x 10^-9 for the reaction 2HBr (g)---> +H2(g) + Br2 (g). If the initial partial pressures o
Damm [24]

Answer : The partial pressure of H_2 at equilibrium is, 1.0 × 10⁻⁶

Explanation :

The partial pressure of HBr = 1.0\times 10^{-2}atm

The partial pressure of H_2 = 2.0\times 10^{-4}atm

The partial pressure of Br_2 = 2.0\times 10^{-4}atm

K_p=4.2\times 10^{-9}

The balanced equilibrium reaction is,

                                2HBr(g)\rightleftharpoons H_2(g)+Br_2(g)

Initial pressure    1.0×10⁻²       2.0×10⁻⁴      2.0×10⁻⁴

At eqm.            (1.0×10⁻²-2p)   (2.0×10⁻⁴+p)  (2.0×10⁻⁴+p)

The expression of equilibrium constant K_p for the reaction will be:

K_p=\frac{(p_{H_2})(p_{Br_2})}{(p_{HBr})^2}

Now put all the values in this expression, we get :

4.2\times 10^{-9}=\frac{(2.0\times 10^{-4}+p)(2.0\times 10^{-4}+p)}{(1.0\times 10^{-2}-2p)^2}

p=-1.99\times 10^{-4}

The partial pressure of H_2 at equilibrium = (2.0×10⁻⁴+(-1.99×10⁻⁴) )= 1.0 × 10⁻⁶

Therefore, the partial pressure of H_2 at equilibrium is, 1.0 × 10⁻⁶

4 0
3 years ago
**<br> H₂ + O2-&gt;<br> Balancing equations from a reaction
goblinko [34]

Answer:

2H2+O2->2H2O

Explanation:

You have to balance the equation, you have 4 hydrogen and 2 oxygen atoms

8 0
3 years ago
Can someone plz help me???? will mark as brainliest!!!!!!!!!!!
Nookie1986 [14]

1=c    2=a     3=b

i hope these answer your questions


7 0
2 years ago
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