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2 years ago

12

Lacie kicks a football from ground level at a velocity of 13.9 m/s and at an angle of 25.0° to the ground. How long will the bal

l be in the air before it lands? Round your answer to the nearest tenth

2 answers:

Trava [24]2 years ago

6 0

T= 1.2 seconds
Other questions have been asked about this

avanturin [10]2 years ago

4 0

Answer:

1.2 seconds and the football will travel 15.1 meters

Explanation:

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ρ = 5 g/cm^3

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2 years ago

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The roller coaster is designed according to safety regulations that prohibit the speed of the car from exceeding 20 m/s. find th

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maximum allowed value of the speed in roller coaster is given as

$v = 20 m/s$

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2 years ago

(a) What is the minimum width of a single slit (in multiples of λ ) that will produce a first minimum for a wavelength λ ? (b) W

Kitty [74]

Answer:

The minimum value of width for first minima is λ

The minimum value of width for 50 minima is 50λ

The minimum value of width for 1000 minima is 1000λ

Explanation:

Given that,

Wavelength = λ

For D to be small,

We need to calculate the minimum width

Using formula of minimum width

$D\sin\theta=n\lambda$

$D=\dfrac{n\lambda}{\sin\theta}$

Where, D = width of slit

$\lambda$ = wavelength

Put the value into the formula

$D=\dfrac{n\lambda}{\sin\theta}$

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Put the value into the formula

$D=\dfrac{1\times\lambda}{1}$

$D=\lambda$

(b). If the minimum number is 50

Then, the width is

$D=\dfrac{50\times\lambda}{1}$

$D=50\lambda$

(c). If the minimum number is 1000

Then, the width is

$D=\dfrac{1000\times\lambda}{1}$

$D=1000\lambda$

Hence, The minimum value of width for first minima is λ

The minimum value of width for 50 minima is 50λ

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3 years ago

Find the average speed of a car that travels 45km in 2hours 15minutes

Helga [31]

Answer:

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