Given :
The ball of a ballpoint pen is 0.5 mm in diameter and has an ASTM grain size of 12.
To Find :
How many grains are there in the ball?
Solution :
Volume of ball of the ballpoint is :
Now, grain size of 12 has about 520000 grains/mm³.
Therefore, number of grains are :
Answer:
1. 60m
4. its speed is 20m/s . gravity is 10m/s . 20 ÷ 10 = 2 seconds after these 2 sec are over the velocity will be zero thus it would have fallen.
Explanation:
Am sorry these is what i could answer but i will try to research and get answers for the rest of the questions, hope this helps
Answer:
1800 m
Explanation:
This question requires you to calculate the distance traveled after 6 minutes at a speed of 5m/s
Given speed as 5m/s and time is 6 minutes then;
Change minutes to seconds by multiplying the minutes by 60 seconds
1 minute=60 seconds
6 minutes= 6*60 = 360 seconds
Apply the formula for speed where;
S=D/T where S is speed, D is distance and T is time
To get D , rewrite formula as S*T
where S= 5m/s and T=360s
D= 5*360 =1800m
<span>The students will move away from each other as explained by Newton’s Third Law which states that “To every action, there is an equal and opposite reaction.” If the students are on frictionless skates, their action of throwing the ball will propel them in the opposite direction. Once the motion is initiated, they continue to move away from each other unless stopped by another force.</span><span />
Answer:
The winner of the race is the boat because the it get to the goal a time of t=42.42 seg
Explanation:
The problem has tow steps the first one is the time takes each vehicule to get the top speed.
1.
2.
Now after they take the top speed have to know who get first to the goal
So the speed Vo is now the final velocity calculated before
