friction between the tire of a moving car and the dry pavement is: A. static B. rolling C. sliding D. riding
1 answer:
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Answer:
potential energy is a stored energy or energy of position (gravitational).
Kinetic energy is a energy of motion.
Explanation:
in the formula K is for the kinetic and the P stand for the potential.
Answer:
Heat transferred = 22.9 watt
Explanation:
Given that:
= 27°C = (273 + 27) K = 300 K
= 600°C = (600 +273) K = 873 K
speed v = 2 m/s
length x = 40 cm = 0.4 cm
width = 1 cm = 0.001 m
The heat transferred from the plate can be calculate by using the formula:
Heat transferred = h×A ×ΔT
From the tables of properties of air, the following values where obtained.
To start with the reynolds number; the formula for calculating the reynolds number can be expressed as:
reynolds number =
reynolds number =
reynolds number =
reynolds number = 52688.11204
Prandtl number =
Prandtl number =
Prandtl number =
Prandtl number = 0.754963
The nusselt number for this turbulent flow over the flat plate can be computed as follows:
Nusselt no =
h = 9.992 W/m.k
Recall that:
The heat transferred from the plate can be calculate by using the formula:
Heat transferred = h×A ×ΔT
Heat transferred =
Heat transferred = 9.992 × (0.4 × 0.01) ×(873-300)
Heat transferred = 22.9 watt