Energy is released or absorbed ,but no loss in total molecules,each of which consists of one atom of oxygen and two of hydrogen,are broken down.!
I would say that it is Meteors, Meteorites, and comets. (METEORS may be wrong)
Answer:
Explanation:
B. Turn the steering wheel while the car is moving.
causes centripetal acceleration.
C. Press the gas pedal while the car is stopped.
causes forward acceleration.
D. Press the brake pedal while the car is moving.
causes rearward acceleration.
Bluish-white, lustrous metal. Brittle at ambient temperatures, however it is malleable at 100 to 150 degrees (C) and is a 'okay' conductor of electricity. The density is 7.140 g/mL. This means the mineral will sink in water and is reasonably heavy. (These are physical, if you need them)
(These will be chemical, what you asked for.) It is based upon sulfide ores. It is roasted in industrial plants to form zinc oxide, ZnO. This may be reduced with carbon to form zinc material. Zinc burns in air at high red heat with evolution of white clouds of the zinc oxide.
Answer:
25.7 N
44.8 N
Explanation:
Draw a free body diagram of the block. There are three forces: weight force mg pulling down, buoyancy force ρVg pushing up, and normal force N pushing up.
Sum of forces in the y direction:
∑F = ma
N + ρVg − mg = 0
N = mg − ρVg
N = (3.5 kg) (9.8 m/s²) − (1000 kg/m³) (3.5 kg / 4000 kg/m³) (9.8 m/s²)
N = 25.7 N
The water pushes up on the block with a buoyancy force of ρVg. According to Newton's third law, the block pushes back down on the water with an equal force of ρVg.
The other forces are weight force Mg pulling down, and normal force N pushing up.
Sum of forces in the y-direction:
∑F = ma
N − ρVg − Mg = 0
N = Mg + ρVg
N = (1.4 kg + 2.3 kg) (9.8 m/s²) + (1000 kg/m³) (3.5 kg / 4000 kg/m³) (9.8 m/s²)
N = 44.8 N