Thermal equilibrium between two objects exists when
the heat capacities of both objects are the same
the quantity of heat in both objects are the same
the temperatures of both objects are equal
one object loses heat continuously to the other
What effort will a machine of efficiency 90% apply to lift a load of 180N if its efforts are arm is twice as long as its load arm
100N
90N
80N
120N
The focal length of a concave mirror is 2.0 cm. If an object is placed 8.0 cm from it, the image is at
2.7m
2.3m
2.5m
2.0m
What is the cost of running five 500 W lamps and four 100W lamps for 10 hours if electrical energy costs 2 kobo per kWh?
₦0.13
₦0.65
₦3.90
₦39.00
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