Answer:
Explanation:
Energy consumed per day = (2.2 x 1.5 + 4 x .075 x 5 + 2.5 x 1 + 2.3 )kWh
= 3.3 + 1.5 + 2.5 + 2.3
= 9.6 kWh
Energy consumed in a month = 9.6 x 30
= 288 kWh
cost = 288 x .105
= $ 30.24
b ) 288 kWh = 288 x 60 kW
= (288 x 60)/ 4.2 kcal
= 4114.28 kcal
coal required per month = ( 4114.28 / 7500) x (1 / .37 )
= 1.48 kg
coal required per month= 1.48 x 12
=17.76 kg
=
According to the second law of motion, force is equal to the product of mass and acceleration. This means force is proportional to mass. Hence when mass increases, it is understood that force should increase as well. In this case,the answer to this problem is A.
Answer:
work done would be I don't know
Acoustics is the interdisciplinary science that deals with the study of mechanical waves in gases, liquids, and solids including vibration, sound, ultrasound, and infrasound. Cheers.
c. II and III only (the object has 0 acceleration and the object has constant velocity.)
Why?
Let's discard each of the given options to find the correct one(s).
<h3>
- There are no forces acting on the object:</h3>
False, if an object has a constant speed, it does not mean that there are no forces acting on it, in fact, there will be always acting forces, like frictional force, gravity force, air resistance, and others.
<h3>
- The object has a 0 acceleration:</h3>
True, in an object is moving at constant speed, it means that there is no acceleration, the speed will be the same all the time during motion.
<h3>
- The object has constant velocity:</h3>
True, <u>if an object is moving in a straight line at constant speed</u> the velocity will be also constant. The velocity of an object is referring to its speed and its direction, if the object is moving in a straight line, the direction will be the same, so, if the speed is constant, the velocity will be also constant.
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