Answer:
the work done by the net external force acting on the skier is 3046.12 J.
Explanation:
Given;
initial speed of the water skier, u = 6.3 m/s
final speed of the water skier, v = 10.9 m/s
mass of the water skier, m = 77 kg
The work done by the net external force is calculated as;
W = ΔK.E
Therefore, the work done by the net external force acting on the skier is 3046.12 J.
The statement that says "Psychological disorders can be very difficult to diagnose" is true about diagnosing psychological disorders.
<h2>What are psychological disorders?</h2>
Psychological disorders are those mental, behavioral, emotional and thinking conditions that interfere with the normal performance of the individual in society.
- Mental disorders are psychiatric conditions that are expressed in a syndrome, verifiable from different diagnostic criteria.
- The steps to obtain a diagnosis include a medical history, physical examination, and possibly laboratory tests and a psychological evaluation.
Therefore, we can conclude that a psychological disorder is an alteration in the mental balance of a person that requires specialized attention adapted to the characteristics of the dysfunction.
Learn more about psychological disorders here: brainly.com/question/6367767
Answer:
165.11 K Pa
Explanation:
Applying Bernoulli theorem ,the problem which deals with the conservation of energy of a flowing fluid , we have
P + 1/2ρ v² + ρgh = constant
P represents pressure , ρ represents density of liquid flowing v is velocity, h is the height from the ground.
P₁ + 1/2ρ v₁² + ρgh₁ =P₂ + 1/2ρ v₂² + ρgh₂
Substituting the values we get
46.4 x 10³ + .5 x 1000 x (4.37)²+ρg( h₁ - h₂) = P₂ + .5 X 1000x(4.37/4)²
46400+ 9548.45 +1000x 9.8 x 11.2 = P₂ +596.78
P₂ = 165.11 K Pa
The melting of an ice cube is considered a physical change.
Answer:
Explanation:
For convenience, let's represent the thermal expansion coefficient by , i.e. .
Given that, for steel °,
initial length, , initial temperature, °, and the final temperature, °.
Let the length of the rod at ° be .
Now, change in length,
Hence, the length of the rod at ° be .