MIGRATED: interest and compound: A man wishes his son to receive P200,000 ten years from now

A man wishes his son to receive P200 000 ten years from now. What amount should he invest now if it will earn interest of 10% compounded annually during the first 5 years and 12% compounded quarterly during the next 5 years.

interest and compound: amount of loan payment

jones corporation borrowed P 9000 from Brown Corporation on Jan. 1, 1978 and P12000 on Jan.1,1980.Jones Corporation made a partial payment of P 7000 on Jan. 1, 1981. it was agreed that was the balance of the loan woild be amortizes by two payments one of Jan. 1, 1982 and the other on Jan.1, 1983. The second being 50% larger than the first. If the interest rate is 12%. What is the amount of each payment.

Two particles released from the same height and reached the base at the same time

Problem
Particles A and B are elevated 12 meters high from a given reference base. Particle A is projected down an incline of length 20 meters at the same time particle B is let to freely fall vertically. Find the velocity of projection of particle A if both particles strikes the base at the same time.
 

001-two-particles-released-thesame-point.gif

 

Physics: Temperature increase in the nail after 10 hammer blows

a nail driven into a board inc in temp. if we assume that 60% of the kinetic energy delivered by a 1,8 kg hammer w/ a speed of 7.5 m/s is transformed into heat that flows into the nail and does not flow out, what is the temp inc of an 8 g aluminum nail after it is struck ten times?