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Given that the moon has about has the same angular size as the new 20 peso coin, held at 1m from the eye and that the diameter of the moon is 3.5 x 10^6 m estimate the distance from the earth to the moon.
5.0-g bullet traveling at a speed of 300 m/s enters a tree and exits the other side with a speed of 150 m/s. Where did the bullet’s lost kinetic energy go, and how much energy was transferred?
Describe the mode of operation of one instrument which uses the radiation heat transfer
mechanism
For a certain gas, R=0.277 kJ/kg.K and k=1.384. (a) What are the value of cp and cv? (b) what massof this gas would occupy a volume of 0.425 cu m at 517.11 kPa and 26.7°C? (c) if 31.65 kJ are transferred to this gas at constant volume in (b), what are the resulting temperature ans pressure?
Calculate the volume of water (in cm3 ) that overflows when a Pyrex beaker filled to the brim with 250 cm3 of water at 20 oC is heated to 60 oC. **Do not enter the units.
Coefficients of Volume Expansion:
Substance Coefficient ×10−4 /oC.
Water 2.1
Pyrex glass 0.09
**Do not enter the units in your final answer
Problem Solving: Show your complete Solution.
- In an atom an electron moves about its nucleus in a circular path of radius 5.30 x 10-11 m, with a speed of 2.20 x 106 m/s. Find the acceleration of the electron and the centripetal force. (mass of electron = 9.11 x 10-31 kg)
2.A ball weighing 1.5 kg is whirled in a circular path at a speed of 12.0 m/s. If the radius of the circle is 5.6 m, what is the centripetal force?
A 15g bullet traveling at 500m/s strikes an 0.8kg block of wood that is balanced on the table edge 0.8m above the ground. If the bullet buries itself in the block . Find the distance D at wich the block hits the floor.
A 2kg block is released 4m from a massless spring with a force constant K=100N/m that is aong a plane inlined at 30°. If the coefficient of kinetic friction between the plane and the block is 0.2, find the maximum compression.
Two vehicles are approaching an intersection. One is a 2500-kg pick up travelling at 14.0 m/s from east to west ( the -x direction), and the other is a 1500-kg sedan going from north to south ( the + y direction) at 23.0 m/s. What is the x components of the net momentum for this system?
A uniform solid cylinder, sphere and hoop roll slipping from rest at the top of an incline. Find out which object would reach the bottom first
