Answer:
Explanation:
Given
First charge of 
is placed at 
Second charge 
is placed at 
Electric field is given by
Electric field due to 
is away from it
Electric field due to 
Net electric field will be vector addition of two
Magnitude of Electric field is
Answer:
Explanation:
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In this case, since equilibrium temperature problems involve the mass, specific heat and temperature change for the substances at different temperatures, we can write:
Thus, since we are talking about water and they both have the same specific heat, we can write:
Now, we plug in the temperatures to obtain:
Next, since the total volume of water is 800 L, since it has a density of 1kg/L, we infer the total mass is 800 kg; that is why we can write a 2x2 system of simultaneous equations:
Thus, the masses of both cold and hot water turn out:
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1.)the microwaves are absorbed by the water molecules in the cocoa. this causes the water molecules to vibrate very fast.
2.)this fast vibration causes the molecules to heat themselves up by means of bumping into each other (friction).
Answer:
4375 N, 7875 N
Explanation:
since the body is equilibrium
total upward force = total downward force
w weight of the bridge = FL + FR
when the car was introduced,
total downward force = total upward force
FL₁ + FR₁ = w + (m × acceleration due to gravity) with w = FL + FR
then FL₁ + FR₁ = FL + FR + Mcg
FL₁ + FR₁ - FL - FR = Mcg
ΔFL + ΔFR = 1250 × 9.8 = 12250 N
taken the left as the pivot point and using the principle of moment
ΔFR × 14 m = 12250 N × 5 m + (ΔFL × 0 m) since the left is the pivot point.
ΔFR = 61250 / 14 = 4375 N
but
ΔFL + ΔFR = 12250 N
ΔFL = 12250 - 4375 = 7875 N
