Exercise of First Semester

Thermal Physics I

When you are asked to design a container of liquid, what factors should you consider in designing? Give reasons and calculate the volume of container to hold 5 L of liquid

Are rail pad made as one piece long or pieces? Give reasons

If you are asked to design a thermometer for measuring the temperature of boiling water, which liquid (beside alcohol and mercury) is the best? You can find the supporting data by yourself

Thermal Physics II

Are wooden house hotter than cement house? Give reason

Explain how convection related to land breeze

A 500 watt heater is going to boil 2 kg of -5 C ice, how long will this process take? Draw the heating cooling graph, if necessary

1 kg of -5 C ice will be immersed in 1 kg of boiling water. What will be the final temperature?

Wave

What is the type of wave and how many waves are formed from the picture below?

If total time taken is 20 seconds and total length of the wave is 100 cm, calculate the frequency, period, wavelength, speed of wave and amplitude!

What is the type of wave and how many waves are formed from the picture below?

If total time taken is 15 seconds and total length of the wave is 30 cm, calculate the frequency, period, wavelength, speed of wave!

State 4 behaviors of wave!

What are the spectrums of EM wave? Which spectrum has the shortest and the longest wavelength? Which spectrum has the highest and lowest frequency?

Sound

The range of audibility of human ear is between _________ to ___________
The sound with frequency above the range of audibility of human ear is called_______________ while the sound with frequency below the range of audibility of human ear is called_______________

Sound needs ___________ to travel and it travels fastest in _______________, followed by_____________ and the slowest in __________________

A boat transmits sonar pulse to the bottom of the sea and receives the echo 1,5 s after the transmission. If the speed of sound in the water is 1.500 m/s, then calculate the depth of the sea.

A gun is fired between two parallel vertical walls. The echo from one wall is heard 1 s later. The echo from other wall is heard after 3 s later. How far apart are the walls if the speed of sound in air is 340 m/s?

Sketch some transverse to show voice with:
a.high and low pitch
b.Loud and weak sound

Merssene’s law investigates the relation between frequency string with length, area, density and tension of string. What will happen if:
a.Longer string is used?
b.Thinner string is used?
c. Denser string is used?
d.Greater tension is applied?

Explain the main idea of Doppler’s effect!

If you confused, just send an email to idiredja.gunawan@gmail.com or try to meet me during the break.