Dr.phil can help you with that answer also the answer is 21.3
Answer:
W = -148.8 J
Explanation:
given,
mass = 9.2 kg
initial speed = 1.42 m/s
pulling force = 94 N
angle θ = 19.6°
coefficient of kinetic friction = 0.400
the crate is pulled = 4.92 m
to calculate of work done by the gravitation force
gravitation force
W = ( m g sin θ ) x
W = 9.2 × (-9.8) × sin 19.6° × 4.92
W = -148.8 J
Work done by the gravitation force is taken as negative because gravitation force act opposite to the force applied.
Answer:
The heat rejected is 146J.
The work done by the engine is 54J.
The thermal efficiency is 0.27
Explanation:
The efficiency of the carnot engine, which is working between a hot source at a temperature and a cold source at a temperature , is given by:
The normal boiling point of water is 373 K. ()
The temperature of triple point of water is 273.15 K ()
Explanation:
the unknown resistance is 9ohm
Answer: Yes it is possible to turn a vector to a scalar.
Explanation:
Vectors and scalars represent different types of physical quantities. However, it is sometimes necessary for them to interact. Adding a scalar to a vector is impossible because of their different dimensions in space. Although It is possible to multiply a vector by a scalar.