Question on attachment

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Answer 1

Answer: The idea that Jacob uses photocells for all the energy need in the park is a good idea. In this way, he is saving so much electricity because photocells are renewable source of energy. The energy can be used for a lifetime, however, its main disadvantage is that no electricity will be produced if sunlight is not present.

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Срочно нужно решение задания 5, пожалуйста!!!!!

What is the difference between an isotope and an ion? Thanks! :)

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An isotope has two or more copies of a component whereby the atoms have the corresponding amount of protons. While ion is a combination of atoms exhibiting electrical explosives such as the sodium and chlorine atoms in a seasoning extract.

In 2005, the space probe Deep Impact launched a 370 kg projectile into Comet Temple 1. Observing the collision helped scientists learn about the comet’s characteristics. The comet is estimated to have a mass of about 9.0 x 10^13 kg.a. Assuming the estimated mass of the comet at that time was correct, at what distance from the comet’s centre was the gravitational force between the comet and the projectile 32 N?

b. Deep Impact also released a probe to fly by the comet and record images of the collision. Determine the strength of the comet’s gravitational field at the probe’s distance of 5.0 x 103 km from the comet.

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Parta a.

Equation: F = G*m1*m2/d^2

Where
F = 32 N
G = 6.67*10^-11 N.m^2/kg^2
m1 = 9.0*10^13kg
m2 =370 kg
d = distance that separate the center of the two objects.

d^2 = G*m1*m2 / F = 6.67*10^-11 N.m^2/kg^2 * 9.0*10^13 kg *370 kg / 32N = 69,409.69 m^2

d = √69,409.69m^2 = 263.5 m

Part B.

The gravitational field of the comet is g = G*m1/d^2

Notice that it does not depend on the mass of other objects.

Notice also that I will use a distance of 5.0 * 10^3 km, because I think that that is the number that you intended to write in the part b. If that is not the number you can put the right number instead because the solution is written step by step.

g = (6.67*10^-11 N*m^2/kg^2)*(9.0*10^13kg)/(5.0*10^3*10^3m)^2 = 2.4*10^-4 N/kg = 2.4*10^-4 m/s^2

List two examples of energy transformation necessary for the sporting event to take place.

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1. in commentary electrical to sound
2. battery loudspeakers are used chemical to sound
hope it helps

Answer:

1. in commentary electrical to sound

2. battery loudspeakers are used chemical to sound

hope it helps

Explanation:

i copied the other person and my teacher said i got it right

A piston above a liquid in a closed container has an area of 1m2. The piston carries a load of 350 kg. What will be the external pressure on the upper surface of the liquid?

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Pressure is defined as the force exerted per unit of area. From the information given, the force exerted can be attributed to the mass of the load carried by the piston. This means that its weight is equivalent to the force it exerts.

Weight = mass(9.81) = 3433.5 Newtons
Area of piston = 1 m^2
Pressure = Force/Area = 3433.5/1 = 3433.5 N/m^2 or Pascals.

Answer:

3.43 kPa

Explanation:

Um I don't remember how to do this, help :(

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Pressure is a measure of force per unit area:

P = F/A

The water exerts a pressure of 202 kPa = 202,000 Pa on the diver, who has a surface area of 1.50 m². Then the force exerted by the water is F such that

F = PA

F = (202,000 Pa) (1.50 m²)

F = 303,000 N = 303 kN

Matter behaving like a wave rather than like a particle is best illustrated by which phenomenon?

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The photoelectric effect is about electrons being ejected from metals when light is shined on metals. The electrons do not behave like waves in the photoelectric effect. Black body radiation is all about the radiation emitted by warm bodies and not about those bodies behaving like waves. The emission spectra of atoms is all about what light is given off by atoms when electrons in those atoms jump down to lower energy levels from higher levels. That also has nothing to do with matter behaving as a wave. Interference is classically defined as the generation of a new wave with an amplitude modulated according to the waves that interfere to form that new wave. Note its emphasis on the wave part.

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