Circularity (especially formation of a circle of an orbit)
Answer:
(a): The ball is in the air t= 0.49 sec.
(b): The speed of the ball in the instant it leaves the table is V= 2.44 m/s.
Explanation:
h= 1.2m
d= 1.52m
h= g*t²/2
t=√(2*h/g)
t=0.49 sec (a)
d= V*t
V= d/t
V= 2.44 m/s (b)
Answer:
Explanation:
From Newton's 2nd Law, we have . We can use this to find the acceleration of object after 20 N (force) is applied to the 10 kg object.
Substituting given values, we have:
Now that we have acceleration, we can find the final velocity of object (after 0.5 seconds) using the following kinematics equation:
, where is final velocity, is initial velocity, is acceleration, and is time.
Solving for final velocity:
The momentum of an object is given as . Since we've found the final velocity and mass stays constant, we have:
Answer:
11.3298W
Explanation:
The rate of heat transfer is determined from the enthalpy of vaporization at the give pressure obtained and the mass flow rate. The mass flow rate is determined from the volume of the boiled water, the given time interval and the specific volume of the saturated liquid.
Given that
1atm as the atmospheric pressure
Internal diameter = 20cm = 0.2m
Time = 15mins = (15×60)secs
Latent heat of vaporization (hevap) = 2256.6
Q = mh(evap)
= m/∆t . hevap
= V/αliq∆t ×h(evap)
D^2π∆h/4αliq ∆t × hevap
= 0.2^2 ×π×0.8×2256.5/4×0.001043×15×60
=0.04×3.142×0.08×2256.6/2.00256
= 22.68876/2.00256
Q = 11.3298W
1. Resistor
2. Insulator
3. Current
4. Semiconductor
5. Conductor