Different units of power given in the question is: joule/sec (J/s), kilowatt (kW), watt (W), megawatt (MW), kilowatt x hr / year (kWh / yr), gigawatt (GW).
Different units of energy given in the question is: calorie (cal), kilojoule (kJ), kilowatt x hour (kWh), kilocalorie (kcal), joule (J).
What is energy?Energy has the capacity to bring about change, such as motion. To execute tasks (like lifting a box), energy is needed. A battery can store a certain amount of energy, just as a certain quantity of fuel, such as food, can.
The joule is the base unit of energy. This indicates that no matter how quickly a box is picked up, a job like lifting it requires a specific number of joules.
What is power?Power is the ratio of the amount of energy utilized to the time it took to use it. It measures how quickly energy is used or transported. Its watt measurement equals one joule of energy used every second.
Hence, units of energy is equal to products of unit of time and unit of power and they can easily interchange.
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A round stone rolls towards the edge of 21 meter cliff. As it reaches the edge of the cliff,
it is moving forward with a speed of 6.7 m/s. How far, horizontally, from the cliff face
will the rock land?
Answer:
13.9 m
Explanation:
Find time to fall vertically from 21 m to ground then multiply this TIME by the horizontal rate of 6.7 m/s
d = 1/2 a t^2
21 = 1/2 (9.81) t^2 shows t = 2.069 s
2.069 s * 6.7 m/s = 13.9 m
A 4 kilogram object accelerates at 2.5 m/s2. What is the net force in Newtons of the object?
The net force in Newtons of the object is 10N.
Solution:
m1 = 4kg
a = 2.5m/s²
Force m = ma
F = 4 * 2.5 = 10N.
The greater the net force acting on an object the greater its acceleration. Newton's second law of motion summarizes these relationships. We can rewrite the acceleration equation above to find the net force. The net force on an object is the combined effect of all compressive and tensile forces actually acting on the object.
When the forces pushing or pulling an object are unbalanced the object accelerates in the direction of the net force. The net force is the sum of all the individual forces acting on an object. Newton's first law can be viewed as a special case of Newton's second law when the net force F is zero. The acceleration must also be zero.
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(please help answer with solution 50 points)
A golfer can hit a golf ball a horizontal distance of over 300 m on a good drive What maximum height will a 301.5 m drive each if it is launched at an angle of 25.0" to the ground? (Hint: At the top of its flight, the ball's vertical velocity com ponent will be zero.)
The maximum height of the ball is 35.1m.
Solution:
The angle of launch, theta = 25 degree
Let the initial velocity of launch be u
For a horizontal range , R = 301.5 m = u^2 * sin(2*theta) /g
301.5 = u^2 * sin(2*25) /9.81
u = 62.14 m/s
The maximum height , hm = (u * sin(theta))^2 /2g
hm = (62.14 * sin(25) )^2 /(2*9.81) m
hm = 35.1 m
At its highest point, the vertical velocity is zero. As the object falls toward the Earth its vertical velocity increases again, but points in the opposite direction to its initial vertical velocity. This is because gravity acts vertically downward, causing deceleration and making the vertical component of velocity zero. Projectile Motion for Vertical Velocity Calculator is an online tool for calculating the vertical velocity of particles in projectile motion.
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According to the psychoanalytic perspective a personality personality is based on
The psychoanalytic perspective states that a personality is based on the childhood experiences as well as unconscious mind.
What do you mean by psychoanalytic perspective?
In English, the terms psychoanalytic and psychoanalytical are employed. The latter phrase, which is older, originally just meant "related to the investigation of the human psyche." However, both titles evolved to refer to that as psychoanalysis became recognized as a separate therapeutic discipline. Even while both are still in use, psychoanalysis is the more common descriptor nowadays. Humans are defined as having sexual and violent urges from the perspective of a psychoanalytic lens.
Psychoanalytic theory of personality: a psychoanalytic approach that focuses on each person's unconscious thoughts, beliefs, and memories. It says that these traits affect our personalities and behaviors.
The three level of consciousness are:
Consciousness
According to Freud, every human has a conscious mind that stores all of the information they are aware of about their surroundings. Any ideas, emotions, or even easily recalled memories are all included in the conscious mind. It's all we already know and are conscious of.
Preconsciousness
The level immediately beneath aware is known as preconscious. Everything that is not in the conscious mind but may very simply be recalled and become conscious is included in the preconscious mind.
Unconsciousness
The unconscious mind is the third and last degree of consciousness. Anything that is suppressed, seems to have been forgotten, or any emotion or thought that is not conscious is what is known as the unconscious mind. This could include mistreatment or bullying of children toward their parents.
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