I believe the correct answer would be <span>C2H5OH + 3O2 → 2CO2 + 3H2O . A combustion reaction is one that reacts with oxygen and produces carbon dioxide and water. As you can see, option A falls into that category and is a balanced reaction.</span>
We have to speed up the watch so we need to decrease time period of pendulum. So we hv to reduce the length.
Answer:
1500 mph
Explanation:
Take east to be +x and north to be +y.
The x component of the velocity is:
vₓ = 889 cos 0° + 830 cos 59°
vₓ = 1316.5 mph
The y component of the velocity is:
vᵧ = 889 sin 0° + 830 sin 59°
vᵧ = 711.4 mph
The speed is found with Pythagorean theorem:
v² = vₓ² + vᵧ²
v² = (1316.5 mph)² + (711.4 mph)²
v = 1496 mph
Rounded to two significant figures, the jet's speed relative to the ground is 1500 mph.
If the skater isn't holding on to anything, and there's no friction between the skates and the floor, then there's no way for any force to reach her and make her start moving.
-- No matter what the bus does, the skater stays right where she is.
-- But at the same time, the bus starts moving forward.
-- So if the bus-driver looks in his mirror, he see the skater moving down the aisle <em>backwards</em>, away from the driver, towards the <em>back of the bus</em>.