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4 years ago

A spring gun is used to project a 0.5 kg ball, in order to perform this experiment the spring was initially

Physics

1 answer:

yaroslaw [1]4 years ago

5 0

Answer:

Explanation:

Given that,

Mass of ball M = 0.5kg

Spring compressed x = 0.005m

Spring constant K = 395N/m

Speed of ball?

Using conservation of energy

Energy stored in the spring is equal to the kinetic energy of the ball

U = K.E

½kx² = ½mv²

½ × 395 × 0.005² = ½ × 0.5 × v²

4.9375 × 10^-3 = 0.25v²

v² = 4.9375×10^-3 / 0.25

v² = 0.01975

v =√0.01975

v = 0.14m/s

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Find the current in amperes if 96 mC of charge pass through a wire in 8.4 s.

olganol [36]

Answer:

Approximately 11.43

Explanation:

Using the formula charge=current×time

then current=charge/time. That then will be C=96/8.4=11.4285714286 so approximately 11.43

6 0

3 years ago

A non-reflective coating that has a thickness of 198 nm (n = 1.45) is deposited on top of a substrate of glass (n = 1.50). What

spin [16.1K]

Answer:

The wavelength is $\lambda_ 1 = 574.2 nm$

Explanation:

From the question we are told that

The thickness is $t = 198 nm = 198 *10^{-9 }\ m$

The refractive index of the non-reflective coating is $n_m = 1.45$

The refractive index of glass is $n_g = 1.50$

Generally the condition for destructive interference is mathematically represented as

$2 * n_m * t * cos (\theta) = n * \lambda$

Where $\thata$ $\theta$ is the angle of refraction which is 0° when the light is strongly transmitted

and n is the order maximum interference

$\lambda = \frac{2 * n * t * cos (\theta )}{n}$

at the point n = 1

$\lambda _1 = \frac{2 * 1.45 * 198*10^{-9} * cos (0 )}{1}$

$\lambda_1 = 574.2 *10^{-9}$

$\lambda_1 = 574.2 nm$

at n =2

$\lambda _2 = \frac{\lambda _1 }{2}$

$\lambda _2 = \frac{574.2*10^{-9} }{2}$

$\lambda _2 = 2.87 1 *10^{-9} \ m$

$\lambda _2 = 287. 1 nm$

Now we know that the wavelength range of visible light is between

$390 \ nm \to 700 \ nm$

So the wavelength of visible light that is been transmitted is

$\lambda_ 1 = 574.2 nm$

6 0

4 years ago

A truck is carrying a refrigerator as shown in the figure. The height of the refrigerator is 158.0 cm, the width is 60.0 cm. The

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The maximum acceleration the truck can have so that the refrigerator does not tip over is 1.86m/s².

<h3>What is acceleration?</h3>

Acceleration is the change in velocity with time.

The maximum acceleration is obtained by taking moments about the tipping point of rotation.

Moment = force * perpendicular distance
Clockwise moment = Anticlockwise moment

F₂ * 1.58 m = F₁ * 0.67 m

where

F₂ is tipping force = mass * acceleration, a

F₁ is weight = mass * acceleration due to gravity, g

The weight acts at a distance half the width of the refrigerator = 30 cm or 0.3 m

Height of refrigerator is 158 cm 0r 1.58 cm

m * a * 1.58 = m * 9.81 * 0.30

a = 1.86 m/s²

The maximum acceleration the truck can have so that the refrigerator does not tip over is 1.86m/s².

In conclusion, if the maximum acceleration is exceeded, the refrigerator will tip over.

Learn more about acceleration at: brainly.com/question/14344386

#SPJ1

8 0

2 years ago

Pulling a rubber band back and then letting it fly across the room is an example of

Cloud [144]

Answer:

Explanation:

because a elastic band uses elastic energy

7 0

3 years ago

8. What is the S.l unit for mass?<br> A. kg<br> B. m/s2<br> D.N<br> C. m/s

katrin2010 [14]

Answer:

the answer is kg

Explanation:

because the s.i unit for mass is kilogram

3 0

3 years ago