Which is NOT a characteristic of background radiation?A.) It is generally safe
B.) It includes cosmic rays
C.) It burns and causes lung cancer
D.) It occurs naturally in the environment

Answer:

U = 56877.4 J

Explanation:

The potential energy of a body is that which it possesses because it is located at a certain height above the surface of the earth and can be calculated using the following formula:

U = mgh Formula (1)

Where:

U is the potential energy in Joules (J)

m is the mass of the body in kilograms (kg)

g is the acceleration due to gravity (m/s²)

h is the height at which the body is found from the surface of the earth in meters (m)

Data

m= 81.4 kg

g= 9.8 m/s²

h = 71.3 m

Potential energy of Sean and the parachute at the top of the tower

We replace data in the formula (1)

U = m*g*h

U = (81.4 kg)*(9.8 m/s²)*(71.3 m)

U = 56877.4 N*m

U = 56877.4 J

Answer: TRUE for ED2020!! I just took the quiz, good luck!! stay safe and healthy!!

Answer:

Part a)

V = 18.16 V

Part b)

Part c)

P = 672 Watt

Part d)

V = 5.84 V

Part e)

Explanation:

Part a)

When battery is in charging mode

then the potential difference at the terminal of the cell is more than its EMF and it is given as

here we have

now we have

Part b)

Rate of energy dissipation inside the battery is the energy across internal resistance

so it is given as

Part c)

Rate of energy conversion into EMF is given as

Now battery is giving current to other circuit so now it is discharging

now we have

Part d)

Part e)

now the rate of energy dissipation is given as

Answer: If a door is perceived as a rectangle even after being viewed from different angles, it is likely because our brain is applying a cognitive concept known as "shape constancy." Shape constancy is a perceptual phenomenon where we tend to perceive an object's shape as being consistent and unchanged, even when viewed from different angles or under varying lighting conditions.

This phenomenon occurs because our brains are constantly processing the visual information we receive and attempting to make sense of it. When we encounter a door, our brain has a preconceived notion that a typical door is rectangular in shape. As a result, even when we see the door from an angle that might distort its appearance, our brain adjusts the perception to maintain the idea that it is a rectangle.

This concept of shape constancy is a part of how our brains simplify the complex visual information we receive from the environment. It helps us recognize objects more easily and efficiently, even when they are presented in different orientations or lighting conditions.

In reality, the door may not appear as a perfect rectangle when viewed from various angles, but our brain's tendency to maintain shape constancy can override these visual discrepancies, and we continue to perceive it as a rectangle. It's important to note that this phenomenon is not limited to doors; it applies to many objects in our everyday lives, helping us make sense of the world around us.

Final answer:

Perception of a door as a rectangle from different angles is due to the flexibility of our visual perception, allowing our brain to adjust based on various factors. This can be observed in experiments where subjects acclimate to visual distortions over time.

Explanation:

When we view a door from different angles, it may still appear as a rectangle due to the way our brains perceive visual information. Our brains automatically adjust our perception based on various factors like lighting conditions, distance, and movement. This flexibility in perception allows us to make sense of the world around us. For example, in an experiment where subjects wore prism glasses to invert their visual field, initially, they perceived objects differently, but after acclimation, their perception returned to normal.

Learn more about Visual Perception here:

brainly.com/question/12530629

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