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zhenek [66]
3 years ago
10

A particle moving with initial velocity of 5m/s is subjected to a uniform acceleration of -2.5 m/s2.find the displacement for ne

xt 4 second
Physics
1 answer:
LUCKY_DIMON [66]3 years ago
6 0
1/2vt^2-1/2at^2
1/2*5*16-1/2*2,5*16=20
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A traveling electromagnetic wave in a vacuum has an electric field amplitude of 98.9 V/m . Calculate the intensity ???? of this
Pani-rosa [81]

Answer:

intensity = 12.98 W/m^2

Energy = 3.93 J

Explanation:

As we know that the magnitude of electric field intensity is given as

E = 98.9 V/m

now we know that intensity of the wave is given as the product of energy density and speed of the wave

intensity = \frac{1}{2}\epsilon_0 E^2 c

intensity = \frac{1}{2}(8.85 \times 10^{-12})(98.9)^2(3\times 10^8)

intensity = 12.98 W/m^2

so intensity is the energy flow per unit area per unit of time

so the energy that flows through the area of 0.0259 m^2 in 11.7 s is given as

Energy = Area \times time \times intensity

Energy = 0.0259(11.7)(12.98)

Energy = 3.93 J

7 0
3 years ago
Only one symbol must be included in every circuit diagram. What symbol is it?
qaws [65]

Explanation :

A pictorial representation of a circuit is called as circuit diagram.

The three important components of a circuit are : Power source, wires and load.

Load means a bulb or any other electrical equipment and power source means a battery.

<em>Out of three components, battery must be included in every circuit diagram because it provides voltage and without voltage there is no electric current.</em>

<u><em>The figure shows the symbol of a battery.</em></u>

7 0
4 years ago
If the 50 kg objects slows down to a velocity of 1 m/s how much kinetic energy does it have?
Bogdan [553]

It has 50kg with a velocity of 1 m/s times the speed of the cart divided by 2 and multiplied by kinectic x plus 5

3 0
3 years ago
Read 2 more answers
What is the speed acquired by a freely falling object 4 seconds after being dropped from a rest position? Use units of meter per
gizmo_the_mogwai [7]

speed = 40 m/s

Explanation:

Since the object is dropped, V0y = 0.

Vy = V0y - gt

= -(10 m/s^2)(4 s)

= -40 m/s

This means that its velocity is 40 m/s downwards. Its speed is simply 40 m/s.

6 0
3 years ago
A plane travels 395,000 meters in 9,000 seconds. What was its speed?
sladkih [1.3K]

When a plane travels 395,000 meters in 9,000 seconds its speed is 395,000 ÷ 9000 = 43.888888 (the 8 repeats) meters per second.

8 0
3 years ago
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