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2 years ago

A shell is launched with an initial velocity at an angle of 40.0° above horizontal

Physics

1 answer:

olasank [31]2 years ago

7 0

Answer:

122.17 m/s

Explanation:

x cos 40 = horizontal velocity

1500 m / x cos 40 = time in the air = 1958.11 / x

x sin 40 = vertical velocity

find when shell vertical velocity = 0 (this is max height....1/2 way through its flight) , the time when it hits the ground will be twice this...

0 = x sin 40 - 9.8 t

t = x sin40 / 9.8 time in the air is twice this = .13118 x

Equate the two times from above to solve for x

1958.11/ x = .13118 x

x = 122.17 m/s

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julsineya [31]

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3 years ago

Usain Bolt accelerates at a rate of 3.7

MissTica

Answer:

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4 years ago

In the flow past a compression corner, the upstream Mach number and pressure are 3.5 and 1 atm, respectively. Downstream of the

yulyashka [42]

Answer:

$\theta=23.7^{\circ}$

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3 years ago

A ticker timer makes 50 dots per second. When a body is pulled by a tap through the timer, the distance between the third and fo

fenix001 [56]

Answer:

The acceleration is 1 cm/s^2.

Explanation:

The acceleration is defined as the rate of change of velocity.

Here, initial velocity, u = 3/1 = 3 cm/s

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time, t = 1 s

Let the acceleration is a.

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3 years ago

The loudness l of a sound, measured in decibels, is given by l=10log10r, where r is the sound's relative intensity. suppose one

marishachu [46]

Answer

given,

I is the loudness of sound

I = 10 Log₁₀ r

r is relative intensity

at when relative intensity is 10⁶

I = 60 dB

how much louder when 100 people would be talking together

I = 10 Log₁₀ r

I = 10 Log₁₀ (10⁶ x 100)

I = 10 Log₁₀ (10⁸)

I = 80 dB

hence, the intensity will be increased by (80 dB -60 dB) 20 dB when 100 people start talking together.

5 0

3 years ago