2 is B. 3 is D. 4 is C. I think 5 is A. 6 is A. 7 is D. I think you are all correct. Good Luck!
The operating coefficient or performance coefficient of a heat pump is the ratio between the heating or cooling provided and the electricity consumed. The higher coefficients are equivalent to lower operating costs. The coefficient can be greater than 1, because it is a percentage of the output: losses, other than the thermal efficiency ratio: input energy. Mathematically can be written as,
Replacing,
Therefore the heat is 3.822kJ
Force required to move a block is 1.615 N
Given:
mass of block = m = 150 pounds = 68 kg
distance = d = 5 ft = 1.52 metres
time = t = 8 sec
To Find:
force required to move the block
Solution: Force is defined as product of mass and acceleration and it's unit is N or Newton.
Velocity = displacement/ time = 1.52 / 8 = 0.19 m/s
Acceleration = velocity/time = 0.19/8 =
0.023 m/s^2
Force = mass x acceleration = 68x0.023 = 1.615 N
Hence, force required to move the block is 1.615 N
Learn more about Force here:
brainly.com/question/12970081
#SPJ4
The speed of the wave is mathematically given as
v=2266.66m/s
A long wave with a period of about 15 minutes will travel across the oceans at a speed of approximately v=2266.66m/s
<h3>
Speed of the wave</h3>
Question Parameters:
A long wave with a period of about 15 minutes
Generally the equation for the Wave velocity is mathematically given as
v=\lambda * frequency
Where
f=1/t
Therefore
v=\lambda * frequency
v=\lambda * 1/t
Therefore, with wavelenght of the ocean as 34km
v=34*1000*1/15
v=2266.66m/s
For more information on Speed
brainly.com/question/4931057
