The amount of energy in the universe is remaining constant .
So , option (D) is right ..
Answer:......................................................................................
.Explanation:
Answer:
speed of the bicycle = 2.81 m/s
Explanation:
given data
tuning fork rated f = 488 Hz
beat frequency fb = 8 Hz
speed of sound vs = 343 m/s
solution
we get here frequency that rider is listening that is
rider hearing frequency = 488 Hz + 8 Hz
rider hearing frequency = 496 Hz
and when it bouncing from sheer wall at frequency of related to stationary object
frequency = 488 Hz + 4 Hz
frequency = 492 Hz
so now we get speed of the bicycle that is
speed of the bicycle = ( 
× 343 ) - 343 Hz
speed of the bicycle = 2.81 m/s
Answer:
m_ice = 0.0777 kg
Explanation:
Given
m_w = 0.22 kg
T_w,i = 79.7 C
T_ice,i = -23.8 C
T_eq = 35 C
C_w = 4190 J/kgK
C_ice = 2100 J/kgK
u_f = 334000 J/kg
The corresponding changes in beaker are:
water: Cools down dT = T_w,i - T_eq = 79.7 - 35 = 44.7 C
Q_loss = m_w * C_w * dT = 0.22*4190*44.7 = 41204.46 J
ice: Heats dT_1 = 0 + 23.8 = 23.8 C , phase change , Heats dT_2 = 35 - 0 = 35 C
Q_absorbed = (m_ice * C_ice * dT_1) + (m_ice*u_f) + (m_ice * C_w * dT_2)
Q_absorbed = m_ice * (2100*23.8 +334000 +4190*35) = 530630 *m_ice
Using Energy balance:
Q_loss = Q_absorbed
41204.46 = 530630 * m_ice
m_ice = 0.0777 kg
In my personal opinion, avoiding in not an effective conflict management strategy. When you are avoiding a conflict, you are really just pushing it to the side and it will need to be dealt with sooner or later. Avoiding a conflict is also ammeter thing to do as well, you should take responsibility and handle any situation.
