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vivado [14]
3 years ago
13

Calcium oxide write this in a formula

Physics
1 answer:
kykrilka [37]3 years ago
4 0

The formula for calcium oxide is CaO.

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Plzzz help me fast i have absolutly no f-r-i-c-k-e-n idea what this is or how to do it
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P.E =mgh

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A northbound train and a southbound train meet each other on parallel tracks heading in opposite directions. The northbound trai
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Answer:

50mph,60mph

Explanation:

Let speed of southbound train=x mph

Speed of northbound train,y=x+16 mph

Distance between two trains after 1.5 hour,174 miles.

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Distance=speed\times time

Using the formula

174=1.5x+1.5(x+16)

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A student is trying to demonstrate static electricity, so they rub two identical balloons with a neutral rabbit fur to give them
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A tradesman sharpens a knife by pushing it with a constant force against the rim of a grindstone. The 30-cm-diameter stone is sp
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Answer:

a. 0.21 rad/s2

b. 2.205 N

Explanation:

We convert from rpm to rad/s knowing that each revolution has 2π radians and each minute is 60 seconds

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180 rpm = 180 * 2π / 60 = 18.85 rad/s

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a)So if the angular speed decreases steadily (at a constant rate) from 21 rad/s to 18.85 rad/s within 10s then the angular acceleration is

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I = mR^2/2

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I = 28*0.15^2/2 = 0.315 kgm^2

So the friction torque is

T_f = I\alpha = 0.315*0.21 = 0.06615 Nm

The friction force is

F_f = T_f/R = 0.06615 / 0.15 = 0.441 N

Since the friction coefficient is 0.2, we can calculate the normal force that is used to press the knife against the stone

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