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hram777 [196]
3 years ago
15

Calculate the work done when a 100-W lightbulb is lit for 30 seconds.

Physics
1 answer:
Mila [183]3 years ago
8 0

Answer:

3000 J

Explanation:

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How to play track and field
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Explanation:

Track and Field is a sport, which is includes disciplines of running, jumping, and throwing events. The sport traces back to Ancient Greece. The first recorded examples of this sport were at the Ancient Greek Olympics. In Ancient Greece, only one event was contested, the stadion footrace. Later on, the game expanded to more events.Events of track and field are divided into three: track events, field events, and combined events. Track events consist of Sprints, middle-distance, long distance, hurdles and relays; Field events consist of jumps and throws; while combined events consist of pentathlon, heptathlon, and decathlon. Track and field is usually played outdoors in stadiums. The usual features of a track and field stadium are the outer running track, and the field within the track

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4 years ago
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A single-slit diffraction pattern is formed on a distant screen. Assuming the angles involved are small, by what factor will the
Law Incorporation [45]

Answer:

y and length is directly relation

Explanation:

Given data

A single-slit diffraction pattern is formed on a distant scree

angles involved = small

to find out

what factor will the width of the central bright spot on the screen change

solution

we know that  for single slit screen formula is

mass ƛ /area = sin θ and y/L = sinθ

so we can say mass ƛ /area =  y/L

and y = mass length  ƛ / area       .................1

in equation 1 here we can see y and length is directly relation so we can say from equation 1 that  the width of the central bright spot on the screen change if the distance from the slit to the screen is doubled

8 0
3 years ago
Explain how sound is produced?​
Vitek1552 [10]

Answer:

Sound is produced when an object vibrates, creating a pressure wave.As the particles vibrate, they move nearby particles, transmitting the sound further through the medium. The human ear detects sound waves when vibrating air particles vibrate small parts within the ear.

6 0
3 years ago
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Why can steam at 100°C cause more severe burns than the same mass of liquid water at 100°C?
harina [27]
The answer is B.The steam has more thermal energy than the liquid water.
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3 years ago
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A physics student devised the following method of measuring the muzzle velocity of a rifle: She fires a bullet into a 4.648 kg w
mrs_skeptik [129]

Answer:

Initial velocity of the bullet will be 307.63 m /sec

Explanation:

We have given that mass of the bullet 7.87 gram m= 0.00787 kg

Mass of the block M = 4.648 kg

So total mass M+m = 4.648 +0.00787= 4.655 kg

Spring constant k = 142.7

Compression x=9.46 cm = 0.0946 m

Now according to energy conservation

\frac{1}{2}(M+m)v^2=\frac{1}{2}kx^2

\frac{1}{2}\times 4.655\times v^2=\frac{1}{2}\times 142.7\times 0.0946^2

v=307.63m/sec

So initial velocity of the bullet will be 307.63 m /sec

4 0
4 years ago
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