Answer:
250 cm³
Explanation:
given,
Length of the Box, L = 5 cm
Width of Box, W = 5 cm
height of the box, H = 10 cm
Volume of the Box = L W H
V = 5 x 5 x 10
V = 250 cm³
Volume of the box is equal to 250 cm³
If a car travels 80 km in 1 hour, then it travels 3 * 80 km in 3 hours.
Answer:
Option D. 23.5 m
Explanation:
From the question given above, the following data were obtained:
Frequency = 200 Hz
Speed of sound in brass = 4700 m/s
Wavelength of sound in brass =?
We can obtain the wavelength of the sound in the brass by using the following formula as illustrated below:
Wave speed = wavelength × frequency
4700 = wavelength × 200
Divide both side by 200
Wavelength = 4700 / 200
Wavelength = 23.5 m
Thus, the wavelength of the sound in the brass is 23.5 m
Answer:
The store energy is 2113109.72 J.
Explanation:
Given that,
Radius = 0.11 m
Mass = 6.5 kg
Spins = 70000 rpm
Suppose we need to find how much kinetic energy is stored by the flywheel when it is rotating at its maximum rate
We need to calculate the moment of inertia
Using formula of moment of inertia
Put the value into the formula
We need to calculate the rotational kinetic energy
Using formula of rotational kinetic energy
Put the value into the formula
Hence, The store energy is 2113109.72 J.