Answer:
(a) 9.0 V (b) 1.5 V (c) 6.0 V
Explanation:
Here we use the simple concept of Kirchhoff's voltage law that potential in series will be added and potential in parallel will be same always. By this concept we answer all 3 parts of this question.
(a) When six 1.5 V batteries are is series means their potential is added.
So, Voltage across six batteries is
So, Net voltage is 9.0 Volts.
(b)When six 1.5 V batteries are in parallel then the net voltage across them will be voltage of either battery.
So, Voltage is
Net voltage is 1.5 Volts.
(c) Now 3 are in series and 3 are in parallel,
the Net voltage of parallel is 1.5 V , now it behaves like <u>four </u>1.5 V are in series so the net voltage become
Net voltage is 6.0 Volts.
Answer:
Explanation:
For elestic collision
v₁ = 
![v_2 = [tex]\frac{(m_2-m_1)u_2}{m_1+m_2} +\frac{2m_1u_1}{m_1+m_2}](https://tex.z-dn.net/?f=v_2%20%3D%20%5Btex%5D%5Cfrac%7B%28m_2-m_1%29u_2%7D%7Bm_1%2Bm_2%7D%20%2B%5Cfrac%7B2m_1u_1%7D%7Bm_1%2Bm_2%7D)
[/tex]
Here u₁ = 0 , u₂ = 22 m/s , m₁ = 77 kg , m₂ = .15 kg , v₁ and v₂ are velocity of goalie and puck after the collision.
v₁ = 0 + ( 2 x .15 x22 )/ 77.15
= .085 m / s
Velocity of goalie will be .085 m/s in the direction of original velocity of ball before collision.
v₂ = (.15 - 77)x 22 / 77.15 +0
= - 21.91 m /s
=Velocity of puck will be - 21.91 m /s in the direction opposite to original velocity of ball before collision.
what type of question is that man ?
Answer:
B followed by D
Explanation:
The heat energy absorbed at B goes into potential energy that breaks the inter-molecular bonds and thus the constant temperature. Once the molecules have gained enough energy they escape the closely bonded structure and thus are free to move in random directions due to high kinetic energy. At this point (part D) an increase in heat energy leads to an increase in the kinetic energy leading to an increase in the temperature.
E the temperature of a substance. Water has a very high specific heat. That means it needs to absorb a lot of energy before its temperature changes. Sand , on the other hand, have lower specific heats. This means that their temperatures change more quickly. When the summer sun shines down on them, they quickly become hot.
