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DedPeter [7]
3 years ago
11

Sound travels at a speed of 1188 km in one hour. How many meters will it travel in one second?

Physics
2 answers:
Nana76 [90]3 years ago
7 0
The answer to this question would be 330 m/sec
Darya [45]3 years ago
7 0

Answer: 330 m

Explanation:

Do some unit conversion.

\frac{1188 km}{1 hr} *\frac{1 hr}{3600 s} \\ = 0.33 km/s.

So in 1 second, it will travel 0.330 km, or 330 m.

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3 years ago
A shell is fired at an angle of 35° above the horizontal at a velocity of 40 m/s. (a) What is it's speed at the highest point of
Fudgin [204]

Answer:

Part a)

v_f = v_x = 32.77 m/s

Part b)

T = 4.68 s

Explanation:

Part a)

Shell is fired at speed of 40 m/s at angle of 35 degree

so here we have

v_x = 40 cos35 = 32.77 m/s

v_y = 40 sin35 = 22.94 m/s

since gravity act opposite to vertical speed of the shell so at the highest point of its trajectory the vertical component of the speed will become zero

so at the highest point the speed is given

v_f = 32.77 m/s

Part b)

After completing the motion we know that the displacement of the object will be zero in Y direction

so we have

\Delta y = 0

0 = v_y t - \frac{1}{2}gt^2

T = \frac{2v_y}{g}

T = \frac{2(22.94)}{9.81} = 4.68 s

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3 years ago
An object initially at rest experiences an acceleration of 9.8 m/s2. How much time will it take to achieve a velocity of 58 m/s?
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