Answer:
Cement is largely made up of calcium oxide. Cement can harden in the gastrointestinal tract and cause obstruction. Inhaling cement dust can cause coughing, wheezing, and difficulty breathing. The best prevention is to avoid or limit contact with cement.
Explanation:
I’ll link the tutorial of how to do a chair in onshape in the comments
As a free and open operating system, Android allows app developers to generate new ideas and work with a wide range of smartphones to open up hardware options, as companies supply a great variety of devices to choose from and high-end devices become more affordable.25 Jan 2017
Answer:
The speed of transverse wave will be 28.2842 m/sec
Explanation:
We have given length of the card = 75 cm = 0.75 m
Tension on the card = 320 N
Mass of the card = 120 gram = 0.12 kg
So linear density 
We have to find the speed of the transverse wave
Speed is given by 

So the speed of transverse wave will be 28.2842 m/sec