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puteri [66]
3 years ago
9

Two sounds, one at 440 Hz and the other at 444 Hz, occur at the same time. What beat

Physics
1 answer:
Alex777 [14]3 years ago
3 0

Answer:

Number of beats per second is equal to the difference between the two combining frequencies. Hence, there will be 444-440=4  

Explanation:

Look above! Hope I helped! Check out my profile for more answers!

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A food packet is dropped from a helicopter during a flood-relief operation from a height of 750 meters. Assuming no drag (air fr
Leviafan [203]

1. Velocity at which the packet reaches the ground: 121.2 m/s

The motion of the packet is a uniformly accelerated motion, with constant acceleration a=g=9.8 m/s^2 directed downward, initial vertical position d=750 m, and initial vertical velocity v_0 = 0. We can use the following SUVAT equation to find the final velocity of the packet after travelling for d=750 m:

v_f^2 -v_i^2 =2ad

substituting, we find

v_f^2 = 2ad\\v_f = \sqrt{2ad}=\sqrt{2(9.8 m/s^2)(750 m)}=121.2 m/s

2. height at which the packet has half this velocity: 562.6 m

We need to find the heigth at which the packet has a velocity of

v_f=\frac{121.2 m/s}{2}=60.6 m/s

In order to do that, we use again the same SUVAT equation substituting v_f with this value, so that we find the new distance d that the packet travelled from the helicopter to reach this velocity:

v_f^2-v_i^2=2ad\\d=\frac{v_f^2}{2a}=\frac{(60.6 m/s)^2}{2(9.8 m/s^2)}=187.4 m

Which means that the heigth of the packet was

h=750 m-187.4 m=562.6 m

3 0
3 years ago
A car accelerates for 10 seconds. During this time, the angular
bagirrra123 [75]

Answer:

the angular acceleration of the car is 1.5 rad/s²

Explanation:

Given;

initial angular velocity, \omega_i = 10 rad/s

final angular velocity, \omega_f = 25 rad/s

time of motion, t = 10 s

The angular acceleration of the car is calculated as follows;

a_r = \frac{\omega_f - \omega_i }{t} \\\\a_r = \frac{25-10}{10} = 1.5 \ rad/s^2

Therefore, the angular acceleration of the car is 1.5 rad/s²

4 0
3 years ago
Sound
Ann [662]
Longitudinal, because the sound can only travel at one direction
3 0
3 years ago
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The total amount of kinetic energy and potential energy within a system is called Question 4 options: A. thermal energy B.electr
dolphi86 [110]
I'm pretty sure the answer is C. :)
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3 years ago
Which is a property of light a: mass b: density c: wavelength d: pitch
Reptile [31]
Im pretty sure its C- Wavelength
6 0
3 years ago
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