An engine pumps oil of 200 kg to a height of 40 m for 30 minutes find the power of the engine

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

Which of the choices below is one of the primary gases found in the atmosphere? a. helium b. carbon dioxide c. nitrogen d. argon

The charge on an electron is 1.60218 × 10−19 c and its mass is 9.10939 × 10−31 kg. how strong a magnetic field must be experienced by the electron if its path is a circle of radius 5.5 cm? answer in units of t.