Answer:
a. 44 m
Explanation:
We don't have the table but we can still answer since the motion is a free-fall motion.
First of all, we calculate the velocity of the body at time t = 4 s, with the equation
where
u = 0 is the initial velocity
g = 9.8 m/s^2 is the acceleration of gravity (we take downward as positive direction)
t is the time
Using t = 4 s,
Now we can calculate the distance covered during the time t = 4 s and t = 5 s using the other suvat equation
where
is the time interval we are considering. Substituting values,
Answer:
B
Explanation:
When something is moving at a constant velocity it's called the centripetal force. And the centripetal force accelerates radially outwards. It's like an ambulance siren. the sound waves are being exerted out into the atmosphere radiallly.
Use the Ideal Gas Law to the air in the tire :
( P ) ( V ) = ( n ) ( R ) ( T )
n = ( P ) ( V ) / ( R ) ( T )
P = P gauge + P baro = 31.2 psig + 14.8 psia = 46 psia
P = ( 46 psia ) ( 1 atm / 14.696 psia ) = 3.13 atm
n = ( P ) ( V ) / ( R ) ( T )
n = ( 3.13 atm ) ( 4.6 L ) / ( 0.08206 atm - L / mol - K ) ( 26.0 + 273.2 K )
n = 0.5864 moles
m = ( n ) ( M )
m = ( 0.5864 mol ) ( 28.96 g/ mol ) = 16.98 g
Answer: The net force is the vector sum of all the forces acting on an object. When an object is in equilibrium (either at rest or moving with constant velocity), the net force acting on it zero. A vector can only have zero magnitude if all of its components are zero. there is more than one force acting on an object, then F is the net force. If two people pull on an object with equal forces in opposite directions, then the net force is zero and the acceleration is zero
Explanation:
