Make the following conversion.
24.7 mL = _____ cm3
247
2470
2.47
24.7
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24.7.....................................
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Answers
E = Q /(4πε₀r²)
Note:
1 /(4πε₀) = k = 8.99 * 10⁹ Nm²/C²
Q = 6 μC = 6 * 10⁻⁶ C. r = 0.5m
E = kQ / r²
E = (8.99 * 10⁹ * 6 * 10⁻⁶) /(0.5²) Use a calculator
E = 215.6 * 10³ N/C
Electric field strength = 215 600 N/C.
I hope this helps.
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The initial velocity of the ball is v = 23.8 m/s
How to find the initial speed?
We know that kinetic energy is given by:
KE = m*v²/2
Where m is the mass in kg, and we know that the energy transfer is 20% of the intial 65J, then we can write:
0.2*65 = (0.046)*v²/2
Solving this equation for v, the velocity, we get:
v = √[0.2*65*2/0.046]
v = 23.8 m/s
Learn more about kinetic energy:
#SPJ3
kinetic energy supplied to golf ball = 20% of 65 = 0.2 * 65 = 13J,
kinetic energy of ball = [mass * Velocity²]/2,
mass = 46gm = 0.046Kg,
[0.046 * V²]/2 = 13, or 0.046 *V² = 26,
V² = 26/0.046 = 565.22,
V = 23.77 m/sec = initial velocity of golf ball after hitting.
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mass of 1 staple = 0.032380952 g
Hope that helps!!
Answer:
210/6.8 = 1/x
210x = 6.8
x = 0.03238 grams = 32.4 milligrams
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