Answer:
dR/dt = 10.2 ft / s
Explanation:
Let's work this problem by finding the distance between the balloon and the motorcycle and then drift for the speed change of the distance
Balloon
y = y₀ +
t
Motorcycle
x = v₀ₓ t
Distance, let's use Pythagoras' theorem
R² = x² + y²
R² = (v₀ₓ t)² + (y₀ + t)²
v₀ₓ = 88 ft / s
= 8 ft / s
y₀ = 150 ft
R² = (8 t)² + (150 + 8 t )²
R² = 64 t² + (150 + 8t )²
This is the expression for the distance between the two bodies, the rate of change is the derivative with respect to time (d / dt)
2RdR / dt = 64 2 t + 2 (150 + 8t) 8
dR / dt = [64 t + (1200 + 64t )] / R
dR/dt = (1200 +128 t)/R
Let's calculate for the time of 10 s
dR / dt = (1200 + 128 10) / R = 2480 /R
R = √ [64 10² + (150 + 8 10)²
R = √ [6400 + 52900]
R = 243.5 ft
dR / dt = (2480) / 243.5
dR / dt = 10.2 ft / s
Answer:
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Explanation:
Answer:
D. 0.1
Explanation:
Using transformer equation,
N2/N1 = I1/I2................... Equation 1
Where N2 = secondary coil, N1 = primary coil, I1 = input current, I2 = output current.
make I2 the subject of the equation
I2 = I1/(N2/N1)............ Equation 2
From equation 2 above, For the output current of the secondary coil to be 10 times the input current, N2/N1 = 0.1
Hence the right option is D. 0.1
The net change in their depth in feet = -296 6/7 .Earth’s magnetic field is generated in the fluid outer core by a self-exciting dynamo process.
<h3>What is earth's magnetic field?</h3>
By means of a self-exciting dynamo mechanism, the fluid outer core of the Earth produces the magnetic field. The magnetic field is produced by electrical currents travelling through the slowly moving molten iron. The magnetic field that can be observed at the surface of the globe contains sources in the crust, ionosphere, and magnetosphere in addition to the Earth's core.
The geomagnetic field fluctuates on a variety of scales, and these variations are currently described in both the space and time domains, going from low- to high-frequency fluctuations. The last section explains how the Earth's magnetic field can be useful to modern society while also posing risks. However, techniques for monitoring the magnetic field are first outlined.
Hence, The net change in their depth in feet = -296 6/7 .Earth’s magnetic field is generated in the fluid outer core by a self-exciting dynamo process.
To learn more about earth's magnetic field, refer to
brainly.com/question/10736183
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Answer:
an open circuit (A battery, bulb, wire,switch)
Explanation:
the battery supplies the power the wire carries the current from the battery to the bulb but the circuit is not completed if the switch is not connected (Switch )
