Speed of Sound Waves and Mediums Medium

Density of the Medium

Speed of Sound

A

1,500 kg/m3

3500 ms

B

997 kg/m3

1500 ms

C

1.331 kg/m3

350 ms

D

583 kg/m3

1800 ms

Which medium is MOST LIKELY a gas and why?
A
Medium C because it has the lowest density causing sound to travel the slowest.
B
Medium A because it has the highest density causing sound to travel the fastest.
C
Medium D because it has the second lowest density and the second highest frequency.
D
Medium B because it has an average density, causing the sound waves to travel at an average speed.

electromagnetic waves travel through space with vacuums. give me brainliest if right.

answer: the correct answer is 1.

explanation: there are various process in which a radioactive nuclei decays:

1) alpha decay: in this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle. the mass number is reduced by 4 units.

2) electron capture: in this decay process, a parent nuclei absorbs an electron and gets converted into a neutron. simply, a proton and an electron combines together to form a neutron. mass number does not change in this process.

3) gamma ray emission: it is a decay process in which an unstable nuclei gives excess energy by a spontaneous electromagnetic process. this decay releases . this process does not change the mass number.

4) positron emission: it is a type of decay process, in which a proton gets converted to neutron and an electron neutrino. this is also known as -decay. in this the mass number remains same.

from the above information, we see that only alpha-decay is producing a change in the mass number of the nucleus.

this is a good question! i'll do some research and come back when i have the answer!