Unlike a phonograph record that has a constant angular speed, a CD scans information at a constant linear speed (130 cm/s). Does
1 answer:
You might be interested in
Answer:
4Q
Explanation:
Case 1 :
= mass of the metal
= specific heat of the metal
= Change in temperature = 7 - 4 = 3 C
Amount of heat required for the above change of temperature is given as
Case 2 :
= mass of the metal
= specific heat of the metal
= Change in temperature = 19 - 7 = 12 C
Amount of heat required for the above change of temperature is given as
Hence the correct choice is
4Q
2.04 meters distance is traveled by the sled before stopping.
Mass of the sled = m
The initial speed of the sled = 2 m/s
Coefficient of kinetic friction between sled and ice = 0.100
Let the distance the sled moves before it stops be d.
Gravity = 9.8 m/ s²
Let the initial kinetic energy sled be
The work done by the frictional force is,
Work done by frictional force= Initial kinetic energy of the sled
So, the distance traveled by the sled before stopping is
Therefore, the distance traveled by the sled before stopping is 2.04 meters.
To know more about work done, refer to the below link:
#SPJ4