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You are on a recently discovered planet in our solar system that has the same mass
density as earth, but twice the radius.
A. Do you weigh more or less on this planet than you do on earth? By what factor does
your weight change?
B. What is the escape speed of the planet?
C. What is the shortest possible period for a satellite orbiting this planet?
D. If the mass of the sun is Ms = 1:99 1030 kg, how far away must this new planet be
to have the same period as earth?
A PAF helicopter is flying with a horizontal speed of 8.00 m/s distributing relief goods to lahar stricken families in Pampanga. A family stranded on the roof of their house is about 6.00 m below the chopper. With what velocity does the package hit the roof? *
Two fire trucks are moving toward each other at a rate of 25 m/s. If the first
fire truck emits a frequency of 10000Hz and the ambient temperature is 400C,
what will be the observed frequency of the second fire truck?
A trumpet emits a sound frequency equivalent to 100Hz. If the person using
the trumpet is moving towards the listener, what would be the perceived
frequency of the listener if the velocity of the sound is 350 m/s and the man
using the trumpet is moving at the rate of 5 m/s?
A car is moving at a rate of 50 m/s when suddenly the driver hit the horn that
emits 20000Hz frequency. What will be the perceived frequency of a man
standing at the sidewalk if the speed of the sound is 340 m/s and the car is
moving away from the location of the man?
Find the specific gravity and the density of an object with a dimension of 25cm
x 60cm x 80 cm with a mass of 9000g.
Suppose you heat 1,000 g of water to boiling and mix it with 3,000 g of water at 160C contained in an aluminum pail of mass 50 g. What is the temperature of the resulting mixture? Show your complete solution.
The temperature in your body is 750F. If the answer is 23.90C in Celsius scale and 296.9K in Kelvin scale, how will you get these answers?
1. A boy weighing 150 N goes up and down a flight of stairs. The vertical distance between the floor is 5.5 m. How much work is done by gravity?
The density of gold at 20°C is 19,300kg/m3. Find the density at 100°C?
