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andrey2020 [161]
3 years ago
9

Which action describes an experimental investigation?

Physics
1 answer:
EastWind [94]3 years ago
3 0
I think the answer is c
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A scientist measuring the resistivity of a new metal alloy left her ammeter in another lab, but she does have a magnetic field p
nalin [4]

Answer:

3.49\times 10^{-8}\ \Omega\text{m}

Explanation:

r = Radius = \dfrac{2}{2}=1\ \text{mm}

B = Magnetic field = 3 mT

1 mm = Distance from the surface of the wire

V = Voltage

x = Distance from the probe = r+1=1+1=2\ \text{mm}

R = Resistance

L = Length of wire = 4.5 m

Magnetic field is given by

B=\dfrac{\mu_0I}{2\pi x}\\\Rightarrow I=\dfrac{B2\pi x}{\mu_0}\\\Rightarrow I=\dfrac{3\times 10^{-3}\times 2\times \pi 2\times 10^{-3}}{4\pi 10^{-7}}\\\Rightarrow I=30\ \text{A}

Voltage is given by

V=IR\\\Rightarrow R=\dfrac{V}{I}\\\Rightarrow R=\dfrac{1.5}{30}\\\Rightarrow R=0.05\ \Omega

Resistivity is given by

\rho=\dfrac{RA}{L}\\\Rightarrow \rho=\dfrac{0.05\times \pi (1\times 10^{-3})^2}{4.5}\\\Rightarrow \rho=3.49\times 10^{-8}\ \Omega\text{m}

The resistivity of the material is 3.49\times 10^{-8}\ \Omega\text{m}.

4 0
3 years ago
the velocity of a curling stone is due east. what will be the direction of the momentum of the curling stone as it moves?
kirill [66]
East.
momentum = mass x velocity
the direction of the momentum is the same as that of velocity.
8 0
3 years ago
Read 2 more answers
What is the name of the theory that led to the development of the theory of plate tectonics
STALIN [3.7K]

Answer:

Continental Drift

Explanation:

Continental drift is the name of the theory that led to the development of theory of plate tectonics. Theory of plate tectonics is basically latest version of Continental drift, a theory which was initially put forward by scientist “Alfred Wegener” in year 1912. But he was unable to to explain the phenomenon of movement of continents around the planet.

Plate tectonics unified all the geologic descriptions & it proposed that one ought to explain all geologic explanations as though driven by the relative motion of these tectonic plates.

7 0
3 years ago
Read 2 more answers
FIRST TO ANSWER CORRECTLY GETS BRAIBLIEST!!
WINSTONCH [101]
Brushes, battery terminals, commutator, armature, magnets
7 0
2 years ago
A girl lifts a 160-N load to a height of 1 min 0.5 s. How much power is used to lift the load?
Aleonysh [2.5K]

Answer: 320 W

Explanation:

P = W/t

W = F * d

F = 160 N

d = 1 m

t = 0.5 s

W = 160 * 1

W = 160 J

P = 160 J / 0.5 s

P = 320 W

8 0
3 years ago
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