7.9 g/cm3 means that iron weighs 7.9 grams per cubic centimeter. Ten cubic centimeters of iron would weigh ten times as much as one cubic centimeter or iron, or 79 grams.<span>
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Answer: what are the awnser choices
Explanation:
Answer:
induced emf = 28.65 mV
Explanation:
given data
diameter = 7.3 cm
magnetic field = 0.61
time period = 0.13 s
to find out
magnitude of the induced emf
solution
we know radius is diameter / 2
radius = 7.3 / 2
radius = 3.65 m
so induced emf is dπ/dt = Adb/dt
induced emf = A × ΔB / Δt
induced emf = πr² × ΔB / Δt
induced emf = π (0..65)² × ( 0.61 - (-0.28)) / 0.13
induced emf = 0.0286538 V
so induced emf = 28.65 mV
Answer:
Explanation:
Initial is all kinetic energy
final is all potential energy (spring)
½kx² = ½mv²
x = √(mv²/k) = √(1.3(2.8²) / 800) = 0.01274 m or about 1.3 cm
L = L₀ - x = 0.439 - 0.013 = 0.426 m
F = kx = 800(0.01274) = 10.192 or about 10.2 N