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2 years ago

Please hurry please

Physics

1 answer:

Ghella [55]2 years ago

4 0

Answer:

0.765m

Explanation:

gravitational potential energy GPE = mass * acceleration due to gravity * height

Given

GPE = 30Joules

Mass m = 4kg

acceleration = 9.8m/s²

Required

Height h

From the formula

h = GPE/mg

h = 30/4(9.8)

h = 30/39.2

h = 0.765m\

Hence the height of the counter is 0.765m

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Digiron [165]

Answer:

Explanation:

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What describes the gravitational force from a planet

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If you could shine a very powerful flashlight beam toward the Moon, estimate the diameter of the beam when it reaches the Moon.

grin007 [14]

To develop this problem it is necessary to apply the Rayleigh Criterion (Angular resolution)criterion. This conceptos describes the ability of any image-forming device such as an optical or radio telescope, a microscope, a camera, or an eye, to distinguish small details of an object, thereby making it a major determinant of image resolution. By definition is defined as:

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$r = 1.22*(\frac{(384*10^3km)(\frac{1000m}{1km})(550*10^{-9}m)}{7*10^{{-2}}})$

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3 years ago

A truck loaded with sand accelerates along a highway. The driving force on the truck remains constant. What happens to the accel

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Answer:

Acceleration will increase.

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F = ma

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$a=\frac{F}{m}$

Since, F is constant, the acceleration of the truck is inversely proportional to the mass.

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