The heat of combustion of hydrogen (the energy released by burning hydrogen with oxygen) is 1.43×108J/kg. What mass of hydrogen would have to be burned in the sun in one second to release the same amount of energy (i. e., generate the same power) as is released by fusion? Express your answer in kilograms to two significant figures. View Available Hint(s)

In which situation is the acceleration of a car negative? question 5 options: a)the velocity of a car was 75 km/hr over 4 hours. b)the velocity of a car reduced from 50 km/hr over one minute. c)the velocity of a car increased from 40 km.h to 75 km/h over 15 minutes. d)the velocity of a car was 45 km/hr at 2: 00pm and at 4: 00pm its velocity was 85 km/ht.