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A stone is thrown upward from the top of a building at an angle of 30.0° to the
horizontal and with an initial speed of 20.0 m/s. The point of release is 45.0 m above the
ground.
a. How long does it take to hit the ground?
b. Find the stone’s speed impact.
c. Find the horizontal range of the stone.
A stone is thrown upward from the top of a building at an angle of 30.0° to the
horizontal and with an initial speed of 20.0 m/s. The point of release is 45.0 m above the
ground.
a. How long does it take to hit the ground?
b. Find the stone’s speed impact.
c. Find the horizontal range of the stone.
work done on the steady flow system is 30 kJ/kgm. Calculate the heat in HP
if the mass flow rate of fluid is 10 kg per minute given that the internal energy
is decreased by 10 kJ/kgm and the fluid flow is increased by 20 kJ/kgm. Also,
identify if the heat is added to the system or rejected by the system
A point charge Q1 at x= 1 m and a charge Q2 at x= d. What is the relationship between these charges if the resulting electric field is zero at the following points: a) x= d/2 b) x= 2d c) x= -d/2?
(Answer: a) Q1/Q2= 1 b) Q1/Q2= -4 c) Q2/Q1= -9)
A load at rest on the floor is subjected to a force making it move a certain distance. The work produce is 2000 J. The load was acted on by the force for 2 seconds. What is the amount of power?
A force of 500 N acts horizontally on a load at rest on the floor. The load moves a distance of 20 m in 10 s. What is the amount of power?
An airliner must reach a speed of 110m/s to take off. If the available runway is 2.4 km and the aircraft accelerates uniformly from rest at one end, what minimum acceleration must be available if it is to take off?
The length of the mercury column in a non-calibrated mercury thermometer is 5.5 cm
when its bulb is immersed in melting ice and 24.5 cm when the bulb is in the steam above
boiling water at sea level.
Determine the:
i. temperature for a length of 14 cm
ii. length for a temperature of 75 ℃
iii. length that would correspond to a temperature of – 6 ℃
A point of charge 10×10^-6C has a potential of 4×10^4V from a point 2mm from it. Calculate the potential due to the charge when the distance is now 16mm.
A copper rod whose length at 30m is 10.0m is heated to 50oc . Find its new length liner expansityfor copper as 0.00017k-1
