1. A
50 m
45°
100 m
YO
Ground, Y=0
με 0,3
An object with mass of 4 kg is thrown with initial velocity of 20 m/s from point A and
follows track of ABCD.
A) Determine YD.
B) Determine velocity of object at D. (CD = 5m) (20p)
C) Determine time required for object to reach ground. (20p)

An architect plans to use solar energy to heat the next house he designs. what principle of absorption and infrared energy can be applied to the design of the new house? how could she apply to those principals?

Currents in dc transmission lines can be 100 a or higher. some people are concerned that the electromagnetic fields from such lines near their homes could pose health dangers. for a line that has current 150 a and a height of 8.0 m above the ground, what magnetic field does the line produce at ground level? express your answer in teslas and as a percentage of the earth’s magnetic field, which is 0.50 g. is this value cause for worry?

Are formed where bumps from two surfaces come into contact ?