Answer:
sphere #1 carries positive charge and #2 carries negative charge
This is because from the laws of static electricity, disconnecting the copper wire makes #1 to be positively charged and #2 to be negatively charged
Answer:20/47 meter per second
Explanation:
Mass of arrow(ma)=0.25kg
Velocity of arrow(va)=12m/s
Mass of target(mt)=6.8kg
Velocity of target(vt)=0 since target is at rest
Conservation of linear momentum says that :
maxva+mtxvt=(ma+mt)V
V=(maxva+mtxvt)/(ma+mt)
V=(0.25x12+6.8x0)/(0.25+6.8)
V=3/(7.05)
V=20/47 meter per second
Answer:
Part 1. 4. 56 mi/h; Part 2. 7. 16 mi/h south; Part 3. 6. 56 mi/h north
Explanation:
Part 1. Average speed
Speed = distance/time
Distance = Austin-Waco + Waco-Austin + Austin-San Antonio
= 100 mi + 100 mi + 80 mi = 280 mi
Time = 5 h
Speed = 280 mi/5 h = 56 mi/h
Part 2. Average velocity
Velocity is a vector. It includes both speed and direction.
Assume south is positive and north is negative.
Distance = -100 mi + 100 mi + 80 mi = +80 mi
Velocity = +80 mi/5h = +16 mi/h = 16 mi/h south
Part 3. Average velocity Austin-Waco
Distance = north
If the student kept to an average speed of 56 mi/h, the average velocity was 56 mi/h north.
It won't be massive enough to make it hot enough to make any further reations.