A rectangular concrete slab is 0.80m long, 0.60m wide, and 0.05m thick A- calculate its volume in m'2
B- the mass of the concrete slab is 60 kg. Calculate its density in kg/m'2

Waves that cause the most damage during an earthquake are a. surface waves c. s waves b. p waves d. ocean waves

Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10^−2 cm , mounted coaxially within a cylindrical anode with a radius of 0.5580 cm . the potential difference between the anode and cathode is 260 v . an electron leaves the surface of the cathode with zero initial speed (v initial=0). find its speed vfinal when it strikes the anode.

For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat