Answer:
B. metallic
Explanation:
Cu and Fe are metals, so bond between them are metallic.
Answer:
W = 1526.43 J
Explanation:
Given that,
Force acting on a heavy crate, F = 325 N
The rope will make 29.0° angle with the horizontal
The distance covered by the crate, d = 5.37 m
We need to find the work done by the crate. The work done by an object is given by :
So, the required work done is 1526.43 J.
Answer: 4.41 joules
Explanation:
Given that:
work is done by gravity = ?
Mass of pine cone (m) = 50g
Convert mass in grams to kilograms
Since 1000g = 1kg
50g = (50/1000) = 0.05kg
Height of tree (h) = 9 m
Apply the formula for work,
Work = mass x acceleration due to gravity x height
Acceleration due to gravity has a value of 9.8m/s^2
Work = mgh
Work = 0.05kg x 9.8ms^2 x 9m
Work = 4.41J
Thus, 4.41 joules of work is done by gravity.
Answer:
option (B) is correct.
Explanation:
frequency is directly proportional to the speed of wave and inversely proportional to the wavelength.
For string
frequency , f = v/λ
for tube
frequency ∝ 1 / λ
So, we can say that the frequency is inversely proportional to the wavelength.
thus, the higher the mode means shorter the wavelength.
Explanation:
There are 3.28 feet in a meter.
1100 ft/s × (1 m / 3.28 ft) ≈ 335 m/s
Round as needed.