Answer:
Explanation:
Given
mass of hot metal ![m_1=0.06\ kg](https://tex.z-dn.net/?f=m_1%3D0.06%5C%20kg)
specific heat ![c=889\ J/kg-^{\circ}C](https://tex.z-dn.net/?f=c%3D889%5C%20J%2Fkg-%5E%7B%5Ccirc%7DC)
mass of water ![m_2=0.16\ kg](https://tex.z-dn.net/?f=m_2%3D0.16%5C%20kg)
Temperature pf water ![T_2=20^{\circ}C](https://tex.z-dn.net/?f=T_2%3D20%5E%7B%5Ccirc%7DC)
Final Temperature ![T=25^{\circ}C](https://tex.z-dn.net/?f=T%3D25%5E%7B%5Ccirc%7DC)
let
be the temperature of hot metal ball
Heat lost by heat metal bolt is gained by water in calorimeter
Heat lost by hot metal bolt ![Q_1=m\times c\times \Delta T](https://tex.z-dn.net/?f=Q_1%3Dm%5Ctimes%20c%5Ctimes%20%5CDelta%20T)
![Q_1=0.06\times 889\times (T-25)](https://tex.z-dn.net/?f=Q_1%3D0.06%5Ctimes%20889%5Ctimes%20%28T-25%29)
Heat gained by water ![Q_2=m_2\times c_w\times \Delta T](https://tex.z-dn.net/?f=Q_2%3Dm_2%5Ctimes%20c_w%5Ctimes%20%5CDelta%20T)
![Q_2=0.16\times 4184\times (25-20)](https://tex.z-dn.net/?f=Q_2%3D0.16%5Ctimes%204184%5Ctimes%20%2825-20%29)
![Q_1=Q_2](https://tex.z-dn.net/?f=Q_1%3DQ_2%20)
![0.06\times 889\times (T-25)=0.16\times 4184\times (25-20)](https://tex.z-dn.net/?f=0.06%5Ctimes%20889%5Ctimes%20%28T-25%29%3D0.16%5Ctimes%204184%5Ctimes%20%2825-20%29)
![T_1=25+62.75](https://tex.z-dn.net/?f=T_1%3D25%2B62.75)
![T_1=87.75^{\circ}C](https://tex.z-dn.net/?f=T_1%3D87.75%5E%7B%5Ccirc%7DC)
Answer:
0.74 N/cm
Explanation:
The following data were obtained from the question:
Mass (m) = 3 Kg
Extention (e) = 40 cm
Spring constant (K) =?
Next, we shall determine the force exerted on the spring.
This can be obtained as follow:
Mass (m) = 3 Kg
Acceleration due to gravity (g) = 9.8 m/s²
Force (F) =?
F = mg
F = 3 × 9.8
F = 29.4 N
Finally, we shall determine the spring constant of the spring. This can be obtained as follow:
Extention (e) = 40 cm
Force (F) = 29.4 N
Spring constant (K) =?
F = Ke
29.4 = K × 40
Divide both side by 40
K = 29.4 / 40
K = 0.74 N/cm
Therefore, the spring constant of the spring is 0.74 N/cm
Place it in the back of your phone where the old battery was
Answer:
C ) Electric charge.
Explanation:
Amber is used in the experiments related to static electricity.
In electrostatics, elektron was the word used as a variation to amber, by the Greeks. Amber buttons, when rubbed with cloth, attracted hair.
Studies showed that when amber is rubbed with fur, fur became negatively charged and amber became positively charged. That is because amber loses its electrons to fur.
Answer:
the ratio of the smallest division of main scale to the number of divisions of the vernier scale.
Explanation:
difference between the value of one main scale division and one vernier scale division