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3 years ago

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Find the resistance of an electric light bulb if a current of 0.08 A flows when the potential difference across the bulb is 120

V.

1 answer:

lora16 [44]3 years ago

8 0

U=RI Ohm's law
then R=U/I
=120/0.08
=2250Ω
hope this helps you

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What does inertia mean?

Georgia [21]

a tendency of a body to do nothing or to remain unchanged.

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3 years ago

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a man drags a 8.10 kg bag of mulch at a constant speed, applying a 29.5 N at 38°. what is the coefficient of friction?

lesantik [10]

Answer:

The coefficient of friction is 0.38.

Explanation:

The free body diagram is drawn below.

Let $f$ be frictional force acting in the backward direction as shown. Let the coefficient of friction be $\mu$ . Let $N$ be the normal reaction force acting on the bag.

Given:

Mass of the bag is, $m=8.10\textrm{ kg}$

Force acting at $\theta = 38$ ° is $F= 29.5\textrm{ N}$

Acceleration due to gravity is, $g=9.8\textrm{ }m/s^{2}$

The force F can be resolved into its components as $F_{x}=F \cos \theta$ and $F_{y}=F \sin \theta$

Therefore,

$F_{x}=29.5\cos(38)=23.25\textrm{ N}\\F_{y}=29.5\sin(38)=18.16\textrm{ N}$

Now, as there is no acceleration in vertical direction, therefore,

Sum of upward forces = Sum of downward forces

$N+F_{y}=mg\\N=mg-F_{y}=8.10\times 9.8-18.16\\N=79.38-18.16=61.22\textrm{ N}$

Now, as the bag is moving at a constant speed, so acceleration in the horizontal direction is also zero as acceleration is the rate of change of velocity.

Therefore, backward force = forward force.

$f=F_{x}\\f=23.25\textrm{ N}$

Now, frictional force is given as:

$f=\mu N\\\mu = \frac{f}{N}=\frac{23.25}{61.22}=0.38$

Therefore, the coefficient of friction is 0.38.

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3 years ago

Inertia is the property of an object that describes:

8_murik_8 [283]

Inertia is the property of an object that basically describes its resistance to change its state of motion.

For instance, if an object is still, inertia describes the "attitude" of the object to stay still (a force should be applied in order to move it). Similarly, if an object is moving by uniform motion (with constant speed), inertia refers to the "attitude" of the object to keep its uniform motion (again, a force should be applied to the object in order to change this state of motion).

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3 years ago

The pressure of a liquid is given by P = pgh. Calculate the pressure (in SI unit) if the

BlackZzzverrR [31]

Answer:

5000 Pa

Explanation:

First collect the data you've been given already and make sure to convert into the right units;

<em>Density</em><em> </em><em>=</em><em> </em><em>1</em><em> </em><em>g</em><em>/</em><em>cm³</em><em> </em><em>.</em><em>.</em><em>.</em><em>.</em><em>.</em><em>.</em><em> </em><em>1</em><em>0</em><em>0</em><em>0</em><em> </em><em>Kg</em><em>/</em><em> </em><em>m³</em>

<em>acceleration</em><em> </em><em>due</em><em> </em><em>to</em><em> </em><em>gravity</em><em> </em><em>=</em><em> </em><em>1</em><em>0</em><em> </em><em>m</em><em>/</em><em>s²</em>

<em>Height</em><em> </em><em>=</em><em> </em><em>5</em><em>0</em><em> </em><em>cm</em><em>.</em><em>.</em><em>.</em><em>.</em><em>.</em><em>.</em><em>0</em><em>.</em><em>5</em><em> </em><em>m</em>

after collecting the data, use the formula to solve

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<em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em>=</em><em> </em><em>5</em><em>0</em><em>0</em><em>0</em><em> </em><em>Pa</em>

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2 years ago

What is a blood caught that shares electrons between two neutral Atoms

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Are u still in need of help

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