Answer:
When you rub a balloon on a sweater or your hair, the <u>electrons</u> are transferred to the balloon giving it a <u>negative</u> charge. The balloon will then <u>repel</u> any object that has a different charge.
hope this helps :)
Answer:
Explanation:
The speed of the astronaut can be found with the help of law of conservation of momentum .
mv = MV , M is mass of astronaut , m is mass of object thrown , v is velocity of object thrown and V is velocity of astronaut.
Putting the values
77.5 x V = .94 x 12
V = .14554 m /s
This will be the uniform velocity of astronaut.
Distance to be covered = 37.3 m
time taken = distance / velocity
= 37.3 / .14554
= 256.28 s
= 4.27 minutes.
Answer:
The acceleration of each mass is the same, and approximately equal to 
Explanation:
Notice that the mass of the whole system is: 30 kg + 40 kg = 70 kg
If we use a net force of 100 N on the combined system, we can find the acceleration imparted to the masses via Newton's second law:
