Answer:
friction reduces the efficiency of machines, thus we must reduce the friction force that is acting upon it.
Answer:
r = 0.22m
Explanation:
To find the radius of the circular trajectory, you first take into account that the centripetal force of the charged particle, is equal to the electric force between the particle that is moving and the particle at the center of the orbit.
Then, you have:
(1)
m: mass of the particle = 20g = 20*10-3 kg
ac: centripetal acceleration = ?
q: charge of the particle = 5*10^-6C
Fe: electric force between the charges
The electric force is given by:
(2)
r: radius of the orbit
q': charge of the particle at the center of the orbit = -5*10^-6C
Furthermore, the centripetal acceleration is:
(3)
v: speed of the particle = 7m/s
You replace the expressions (2) and (3) in the equation (1) and solve for r:

Finally, you replace the values of all parameters in the previous expression:

The radius of the circular trajectory is 0.22m
Answer:
9.81 m/s² constant
Explanation:
Any object which is falling has only the acceleration due to gravity acting on it. The value of acceleration due to gravity is 9.81 m/s² which is constant. This is the case if air resistance is not taken into consideration.
The air resistance is a result of the surface area of the object which is falling. This will slow down the object and the velocity reached is called the terminal velocity.
Answer:
Acceleration is -30000 mi/h²
Distance travelled in the 3 seconds of deceleration is 261.888 feet
Explanation:
t = Time taken for the car to slow down = 3 s =
u = Initial velocity = 75 mi/h
v = Final velocity = 50 mi/h
s = Displacement
a = Acceleration
Equation of motion

Acceleration is -30000 mi/h²

Converting to feet
1 mile = 5280 feet
0.0496 mile = 0.0496×5280 = 261.888 feet
Distance travelled in the 3 seconds of deceleration is 261.888 feet
Hello!
The answer to your questions is C.
Chemicals in the air- olfactory epithelium- olfactory receptors- cilia-olfactory bulb- brain
~Hope this Helps!~