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3 years ago

Suppose you have a 100-watt light bulb that you leave turned on for one minute. How much energy does it use?

Physics

1 answer:

velikii [3]3 years ago

6 0

Answer:

The energy that 100-watt light bulb consume when is turned for one minute is 1.667 J, Joules are the units of energy or work

Explanation:

The relation between the power and the energy we have to know the units of each

$power= \frac{kg*m^{2} }{s^{3} } \\ energy = \frac{kg*m^{2} }{s^{2} } \\\\energy=\frac{power}{time} \\energy=\frac{100 W}{1 min}*\frac{1 min}{60s} \\ energy= \frac{100 W}{60s}\\ energy=1.6667 J$

The energy in one minute is 1.667 Joules

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The most common liquid on planet earth is

son4ous [18]

The most common liquid on planet earth is water

3 0

4 years ago

A car slows down uniformly from a speed of 22 m/s to rest in 4.0 seconds. How far did it travel in that time

krek1111 [17]

Answer:

$\boxed{\sf Distance \ travelled = 44 \ m}$

Given:

Initial speed (u) = 22 m/s

Final speed (v) = 0 m/s (Rest)

Time taken (t) = 4 seconds

To Find:

Distance travelled by car (s)

Explanation:

From equation of motion of object moving with uniform acceleration in straight line we have:

$\boxed{ \bold{s = (\frac{v + u}{2} )t}}$

By substituting value of v, u & t in the equation we get:

$\sf \implies s = ( \frac{0 + 22}{2} ) \times 4 \\ \\ \sf \implies s = \frac{22}{2} \times 4 \\ \\ \sf \implies s = 11 \times 4 \\ \\ \sf \implies s = 44 \: m$

$\therefore$

Distance travelled by car (s) = 44 m

4 0

4 years ago

The element oxygen forms molecules that each contain two oxygen atoms. The elements carbon and oxygen form molecules that each c

disa [49]

Answer:

The elements carbon and oxygen form molecules that each contain one carbon atom and two oxygen atoms is TRUE.

Explanation:

The elements carbon and oxygen form molecules that each contain one carbon atom and two oxygen atoms is true because a compound can only be formed from the combination of two or more elements but not from one element.

The molecule formed from one carbon element (C) and 2 oxygen elements (O) is CO2. CO2 which is known as carbon(IV)oxide is a compound which is made up of carbon and oxygen elements.

5 0

4 years ago

an object is shot vertically upward into the air with an initial velocity of 20 m/s? which of the following correctly describes

Drupady [299]

Answer:

Answer is (C)

Explanation:

For acceleration

• If the motion is vertically, then acceleration is 9.8 m/s²

» Upward motion, acceleration is negative (-9.8)

» Downward motion, acceleration is positive (+9.8)

For velocity

${ \rm{v = u + gt}} \\ { \rm{v = 20 + ( - 9.8 \times 4)}} \\ { \rm{v = - 19.2 \: m {s}^{ - 1} }}$

5 0

2 years ago

Find the magnitude of the force that our planet's magnetic field exerts on this wire if it is oriented so that the current in it

laila [671]

Answer: F = 2.1 x 10^-4N

Explanation: Question is incomplete.

The complete question is; A straight, 2.5-m wire carries a typical household current of 1.5 A (in one direction) at a location where the earth’s magnetic field is 0.55 gauss from south to north. Find the magnitude and direction of the force that our planet’s magnetic field exerts on this wire if it is oriented so that the current in it is running (a) from west to east.

Given parameters; l = 2.5m, I = 1.5A, B = 0.55 guass = 0.55 x 10^-4 Tesla , theta = 90 (from West to East), F = ?

F = BILsin(theta)

F = 0.55 x 10^-4 x 1.5 x 2.5 x sin 90

F = 2.1 x 10^-4 N.

According to right hand rule, it's direction is upward.

6 0

3 years ago