2 years ago

What is the direction of the frictional force exerted on a coffee cup sitting on a stationary table?

Physics

1 answer:

Alla [95]2 years ago

8 0

There is no frictional force.

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You have designed and constructed a solenoid to produce a magnetic field equal in magnitude to that of the Earth (5.0 10-5 T). I

saul85 [17]

Answer:

$I = 0.03637 A$

Explanation:

The given data in the question is

Magnetic field : $B = 5.0 \times 10^{-5} T$

Turns : $N = 350$

Length : $L = 32 cm = 0.32 m$

So, number of turns per unit length :

$n=\frac{N}{L}$

$n=\frac{350\: turns}{0.32 m}$

$n=1093.75 \: turns \: per \: meter$

If current is I , then magnetic field is given by

$B = \mu_{0} \times n \times I$

Also,

$I = \frac{B}{\mu_{0} \times n}$

Insert the values

$I = \frac{5.0 \times 10^{-5}}{4 \pi \times 10^{-7} \times 1093.75} A$

$I = 0.03637 A$

The current will be $I = 0.03637 A$

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4 years ago

Part A

jok3333 [9.3K]

Answer:

Using 3 periods to get an accurate reading:

3T = (6.40 S - 0.90 s) = 5.50 S So, T = 1.83 s

m = 0.250 kg

Using algebra:

k= $\frac{4\pi ^{2}m }{T^{2} }$ = $\frac{4\pi ^{2}0.250 }{1.90^{2} }$ =2.95kg/sec

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2 years ago

Volcanoes are often formed at plate boundaries. This is a convergent plate boundary. From the choices listed, pick the correct d

katen-ka-za [31]

Your answer should be a

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3 years ago

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Inertia describes which of the following?

Mariana [72]

3. how difficult it is to change an object's motion

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3 years ago

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A walkman uses four standard 1.5 V batteries. How much resistance is in the circuit if it uses a current of 0.02A? *

hodyreva [135]

Answer:

75ohms

Explanation:

V= IR

V = 1.5volts

I = 0.02A

1.5 = 0.02×R

Making R the subject

R = 1.5/0.02

R = 75ohms

The resistance in the circuit will be 75ohms

7 0

3 years ago