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3 years ago

At which position does the diver have the most gravitational potential energy

2 answers:

4 0

Directly vertical. The surface area is the smallest, allowing for the water upthrust to be kept to a minimum, whilst the mass is the same, which keeps the same weight and gravitational pull.

Ray Of Light [21]3 years ago

3 0

Potantial energy formula = m.g.h
m: mass
g: gravitational acceleration
h: height

m and g are the same. So, we must to look at to the height. At the vertical position, the potantional energy increase.

When the h increase, the energy will increases.

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A car increased its velocity to 62m/s in 10s starting from rest. Calculate the distance it covers during this time?

Roman55 [17]

Answer:

distance= velocity ×time

distance= 62×10

distance=620m

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3 years ago

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What is the intensity in W/m2 of a laser beam used to burn away cancerous tissue that, when 85.0% absorbed, puts 470 J of energy

Advocard [28]

Answer:

26036485.6433 W/m²

Explanation:

E= Energy = 470 J

t = Time = 4 seconds

d = Diameter = 2.6 mm

Power is given by

$P=\dfrac{E}{t}$

Intensity is given by

$I=\dfrac{P}{\pi r^2}\\\Rightarrow 0.85I=\dfrac{E}{t\dfrac{\pi}{4} d^2}\\\Rightarrow I=\dfrac{470}{0.85\times 4\times \dfrac{\pi}{4}\times (2.6\times 10^{-3})^2}\\\Rightarrow I=26036485.6433\ W/m^2$

The intensity of the laser beam is 26036485.6433 W/m²

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4 years ago

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timama [110]

Answer:

Showing results for Two point charge q, separated by 1.5cm have change value of +2.0 and -4.0AND/C respectively what is the magnitude of the Electric force midway between them?

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2 years ago

Help me, Ive been stuck for 15 minutes

natita [175]

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3 years ago

The distance between two successive peaks on adjacent waves is its

yKpoI14uk [10]

Answer:

Wavelength

Explanation:

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A continuous propagating wave repeats its wavelength over the distance.

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Wave is defined as a disturbance of any parameter repeated in a cyclic manner over the given time.

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3 years ago