Answer: 2.9
Explanation:
from the question we are given the following:
mass of rock = 220 g
volume of displaced water = 75
the density of an object is gotten from the formula density =
From the question, we were given the mass of a rock and volume of water the rock displaces.
When water is placed in a graduated cylinder and a rock is placed in the water, the volume of water the rock displaces is the increase in the reading of water after the rock has been put in it. The amount of water displaced is known as the volume of the rock.
therefore volume of the rock = volume of water displaced
density = = 2.9
Answer:
The value is
Explanation:
From the question we are told that
The diameter of the storm is
The wind speed is
Generally the radius is mathematically represented as
=>
=>
Generally the angular velocity is mathematically represented as
=>
=>
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