Q1. On a cool morning, while the temperature is 13.0 C, you measure the pressure in your car tires to be 20.0. After driving 40.0 on the freeway, temperature of your tires is 44.0 C. what will the pressure gauge now show?

Q2. The virtual image formed by a convex mirror is one fifth the size of the object.

(a) If the object is 25 cm in front of the mirror, what is the image distance? (Include the sign of each answer.)

(b) What is the focal length of this mirror?

Q3. An electron gun fires electrons at a screen of a television tube. The electrons start from rest and are accelerated through a potential difference of 16500 V. What is the energy of the electrons when they hit the screen? The elemental charge is 1.6 × 10 19 C and the mass of an electron is 9.11 × 10-31 kg. Answer in units of J