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3 years ago

A closed path that allows electrical energy to flow is called a(n)

Physics

2 answers:

Bumek [7]3 years ago

4 0

Answer:

Circuit

Explanation:

Tresset [83]3 years ago

4 0

Circuit jwodnsdnsokdoxx

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What is the strength of the electric field 3.0 cm from a small glass bead that has been charged to + 8.0 nc ?

Debora [2.8K]

Thinking the small glass bead as a single point charge, the electric field generated by it is given by
$E(r) = k_e \frac{Q}{r^2}$
where
$k_e = 8.99 \cdot 10^9 N m^2 C^{-2}$ is the Coulomb's constant
$Q=8.0 nC=8.0 \cdot 10^{-9} C$ is the charge of the bead
$r=3.0 cm=0.03 m$ is the distance at which we calculate the field.

Using these data, we find:
$E=(8.99 \cdot 10^9 N m^2 C^{-2} ) \frac{(8.0 \cdot 10^{-9} C}{0.03 m)^2}=8.0 \cdot 10^4 N/C$

6 0

3 years ago

i got the right answer for this question (pretty sure i guessed or just asked me teacher the answer?) but can someone explain ho

Bingel [31]

Well for you to get 980 Hz you divided 344 m/s with .35 m

6 0

3 years ago

A 20 kg truck drives in a circle of radius 4 m at 10m/s. What causes

jek_recluse [69]

Answer:

Normal force

Explanation:

The force is centipetral force

Calculating :-

Mass=m=20kg
Radius=r=4m
Velocity=10m/s=v

We know

$\boxed{\sf F_c=\dfrac{mv^2}{r}}$

$\\ \sf\longmapsto F_c=\dfrac{20(10)^2}{4}$

$\\ \sf\longmapsto F_c=\dfrac{20(100)}{4}$

$\\ \sf\longmapsto F_c=\dfrac{2000}{4}$

$\\ \sf\longmapsto F_c=500N$

6 0

3 years ago

An ice skater spins at 2.5 rev/s when his arms are extended.He draws his arms in and spins at 6.0 rev/s. By what factor doeshis

Amiraneli [1.4K]

To solve this problem we will apply the concept related to Angular momentum. Said conservation momentum says that its initial state must be equal to that of the final state, that is,

$L_f = L_i$

$\omega_f I_f = \omega_i I_i$

Here,

I = Moment of Inertia

$\omega =$ Angular velocity

Rearranging to find the ratio between the moment of inertia we have,

$\frac{I_f}{I_i} =\frac{\omega_i}{\omega_f}$

Replacing,

$\frac{I_f}{I_i}= \frac{2.5}{6.0}$

$\frac{I_f}{I_i} = 0.42$

Therefore the correct option is C.

7 0

3 years ago

Compare an altitude and a median of a triangle

Nesterboy [21]

The best and most correct answer among the choices provided by your question is the first choice.
<span>The altitude of a triangle is the height of the triangle and the median of a triangle intersects each side.</span>
I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!

3 0

3 years ago