Answer:
1681714.28571 N/C
Yes it could exist
Explanation:
m = Mass of housefly = 12 m
q = Charge = 70 pC
g = Acceleration due to gravity = 9.81 m/s²
E = Electric field
When an object accumulates charge it means that it is gaining electrons making it negatively charged. This is the concept of static electricity.
Here, the electric force and the graviational force will balance each other
1681714.28571 N/C of electric field would be required to levitate
The direction of the electric field would be upwards vertically.
In air the critical value of electric field is which is more than the critical value of electric field in air. So, the electric field can exist.
Answer:
B. kg
Explanation:
Which of the following units are equivalent to newtons?
A. kg•m/s
B. kg
C. m/s^2
D. kg•m/s^2
Answer:
The correct answer is option 'b':
Explanation:
As we know that the image formed by a plane mirror is at same distance behind the mirror as the object is placed in front of the mirror.
Hence we can conclude that the speed of the image as it moves towards the mirror is equal to the speed of the object as it moves towards the mirror.
Thus the relative speed of the object and the image can be calculated as
where
is the speed of the image towards mirror
is the speed of the object towards mirror
Applying values we obtain the relative speed as
Answer:
The speed of the catapult arm needs to be increased.
Explanation:
If the height needs to stay the same, they can not change the length of the catapult arm because this is the variable that determines the height of the thrown object. To change the horizontal distance the object travels, in other words the object's speed, the rope or counterweigth that pulls the catapult arm can be changed to increase the speed that the object is thrown.
I hope this answer helps.
Answer:
Explanation:
Given that,
The length of the pendulum, l = 2 m
The period of the pendulum, T = 2.2 s
The formula for the time period of a pendulum is given by :
or
So, the free fall acceleration is .