The Jovian planets contain a large percentage of the gases Hydrogen and Helium.
Aerodynamics is a way to reduce drag that uses car manufacturers.
Aerodynamics is the motion of the air. airplane flies cause of aerodynamics.
Aerodynamics is the study of forces that are resulted by motion of the air.
To reduce the aerodynamic drag further, the manufacturers use character lines on the exteriors of the car's body right from its concept stage. These lines help the air to pass smoothly over the body and thus, reducing the air resistance.
cars have flat vertical face in front. When it moves through air, drag force directly proportional to the velocity applies on the car which opposes motion of the car. after studding aerodynamics when we make triangular like shape to the front body of the car, it cuts the air and front air goes from side of the car which reduces oppose to the motion, and car can have more speed.
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The answer would be 79J because when you multiply 8.1*0.99*9.8 you get 7.89, which rounds to 7.9.
Answer choice (B).