What object in the solar system is always one foci

Answer;

too small to be seen with an optical microscope

Explanation;

• An electron microscope is a type of microscope that is used to observe very tiny specimens whose features can not be observed by other types of microscopes. It uses a beam of electrons to generate an image of a given specimen whose features can be clearly observed and studied.
• Electron microscope has very high resolution and magnification as compared to other optical microscope hence can be observed in the study of micro-organisms such as viruses which would be difficult to study their features using optical microscopes.

An electron microscope is usually used for microorganisms that are too small to be seen with the unaided eye. You can adjust the size of the microorganism to see it more clearly by adjusting its magnification lens. 

Answer:

115.565 km

Explanation:

We know

A bus is traveling at 79.7 kilometers per hour east.

How far does the bus travel in 1.45 hours?

We will solve it by using the Distance formula.

Distance = Speed × Time

We take

79.7 x 1.45 = 115.565 km

So, the bus travels 115.565 km in 1.45 hours.

The photon energy is 75 keV (kilo-electron volts) for polonium, assuming the free electron has no initial kinetic energy.

The maximum characteristic x-ray photon energy from the capture of a free electron into a K-shell vacancy is equal to the difference in binding energies between the K-shell and L-shell in the atom.

For polonium (Po), the atomic number is 84, which means it has 84 electrons. The K-shell of polonium is filled with 2 electrons, and the L-shell is filled with 8 electrons.

The K-shell binding energy for polonium can be found in a table of atomic data to be around 88 keV. The L-shell binding energy can also be found in the same table to be around 13 keV.

Therefore, the maximum characteristic x-ray photon energy from the capture of a free electron into a K-shell vacancy in polonium is:

E = (K-shell binding energy) - (L-shell binding energy)

= 88 keV - 13 keV

= 75 keV

To know more about binding energies refer here

brainly.com/question/30073915#

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Answer:

The question seems to refer to Newton's Laws of Motion. Here are examples of the 1st, 2nd, and 3rd laws:

1st Law (Law of Inertia):

- An object at rest tends to stay at rest, and an object in motion tends to stay in motion with the same speed and direction unless acted upon by an external force.

- Example: When a car suddenly stops, passengers continue to move forward due to their inertia until a seatbelt or airbag applies a force to stop them.

2nd Law (Law of Acceleration):

- The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

- Example: When pushing a heavy box and a lighter box with the same amount of force, the lighter box accelerates more because it has less mass.

3rd Law (Law of Action and Reaction):

- For every action, there is an equal and opposite reaction.

- Example: When you push against a wall, the wall pushes back with an equal amount of force.

It's important to note that these laws are foundational principles in classical physics and are widely applicable in understanding the behavior of objects in motion.

Explanation: