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tekilochka [14]
3 years ago
10

Mixing baking soda with vinegar is an example of an oxidation-reduction

Physics
1 answer:
34kurt3 years ago
4 0

Answer:

B. False

Explanation:

The reaction of baking soda and vinegar produces carbon dioxide gas. It is an example of precipitation reactions.

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A suspension bridge is 60.0 m above the level base of a gorge. A stone is thrown or dropped from the bridge. Ignore air resistan
Alexxx [7]

Answer:

a)t_{1}=3.49s

b)t_{2}=2.00s

c)Xmax=80.71m

Explanation:

<u>a)Kinematics equation for the Stone, dropped:</u>

v(t)=v_{o}-g*t

y(t)=y_{o}+v_{o}t-1/2*g*t^{2}

y_{o}=h=60m       initial position is bridge height

v_{o}=0m/s       the stone is dropped

The ball reaches the ground, y=0, at t=t1:

0=h-1/2*g*t_{1}^{2}

t_{1}=\sqrt{2h/g}=\sqrt{2*60/9.83}=3.49s

<u>b)Kinematics equation for the Stone, with a initial speed of 20m/s:</u>

v(t)=v_{o}-g*t

y(t)=y_{o}+v_{o}t-1/2*g*t^{2}

y_{o}=h=60m       initial position is bridge height

v_{o}=-20m/s       the stone is thrown straight down

The ball reaches the ground, y=0, at t=t1:

0=h+v_{o}t_{2}-1/2*g*t_{2}^{2}

0=60-20t_{2}-1/2*9.83*t_{2}^{2}

t2=-6.01       this solution does not have physical sense

t2=2.00

<u>c)Kinematics equation for the Stone, with a initial speed of 20m/s with an angle of 30° above the horizontal:</u>

v(t)=v_{o}-g*t

y(t)=y_{o}+v_{o}t-1/2*g*t^{2}

y_{o}=h=60m       initial position is bridge height

v_{o}=20sin(30)=10m/s       the stone is thrown with an angle of 30° above the horizontal

The ball reaches the ground, y=0, at t=t3:

0=h+v_{o}t_{3}-1/2*g*t_{3}^{2}

0=60+10t_{3}-1/2*9.83*t_{3}^{2}

t3=-2.62       this solution does not have physical sense

t3=4.66

the movement in x:

v=constant=20cos(30)m/s

x(t)=v*t

Xmax=v*t3=20cos(30)*4.66=80.71m

3 0
3 years ago
34.1 grams / 1.1 mL =
nataly862011 [7]

Answer:

31,000kg/m^3

Explanation:

Hopefully this helps

6 0
3 years ago
Why is it realistic to say all living organisms are solar powered
Naddika [18.5K]
Beucase for example: humans rely on the sun for vitamins and to keep theyre skin healthy, animals for the same reason and plants rely on it for photosynthesis. hope that helps!
3 0
3 years ago
Suppose the coefficient of kinetic friction between mA and the plane in the figure(Figure 1) is μk = 0.15, and that mA=mB=2.7kg.
luda_lava [24]
A ) 
T = mB g + mB a
T + mA a - mA g sin 35° = (Mi) mA g cos 35°
------------------------------------------------------------
T = 2.7 · 9.81  + 2.7 a
T = 26.487 + 2.7 a
26.487 + 2.7 a + 2.7 a - 2.7 · 9.81 · 0.574 = 0.15 · 2.7 · 9.81 · 0.819
5.4 a + 26.487 - 15.2023 = 3.2539
5.4 a = 8.0296
a = 1.487 ≈ 1.5 m/s²
B )
T = 2,7 · 9.81 = 26.487 
26.487 - 15.2035 = (Mi) · 2.7 · 9.81 · 0.819
11.2835 = (Mi) · 21.69
(Mi) = 11.2835 : 21.69 = 0.52
4 0
3 years ago
REALICE UN ANALISIS DEL TEMA, INDICANDO LAS IDEAS PRINCIPALES
katen-ka-za [31]

Answer:

De cual Tema??? jajaja no se que necesitas

8 0
3 years ago
Read 2 more answers
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