A foot strikes the floor with a force of 520N at an angle of 20 degrees. what is the friction force exerted by the foot?

Answers

Answer 1

Answer:

Answer:

Friction force on the ground is 488.6 N

Explanation:

As we know that the force of reaction which is along the horizontal surface in tangential direction is known as Friction force while other perpendicular component of the force is Normal force

Here we know that force is inclined at 20 degree with the horizontal

so we have

$F_f = F cos\theta$

here we know

F = 520 N

$\theta = 20 degree$

so we have

$F_f = 520 cos20$

$F_f = 488.6 N$

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Nuclei of u-238 atoms are

Answers

Nuclei of U-238 atoms are unstable and radioactive isotope of uranium . It decays naturally and emits alpha (α) particle.

What is Nuclei of uranium ?

The actinide series includes the metallic, silver-gray element uranium (U). It serves as the primary fuel for nuclear reactors and is also a component of nuclear weapons.

Since uranium has an atomic number of 92, its atomic structure consists of 92 protons and 92 electrons. The nucleus of U-238 contains 146 neutrons, but this number can range from 141 to 146. Due to its radioactivity, uranium constantly emits particles and transforms into new elements.

There is a recognized radioactive decay series for uranium. The most prevalent uranium isotopes are U-238 and U-235 (which has 143 neutrons). All three isotopes of uranium (U-238, 235, and 234) are present in nature, and variations from the typical composition are rarely greater than 0.01%.

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Nuclei of u-238 atoms are unstable and spontaneously emit alpha particles.

Which body system processes into a useable source of energy

Answers

possibly limpathic or respiratory system

When a potassium atom forms an ion, it loses one electron. What is the electrical charge of the potassium ion? A.
-1

B.
-2

C.
+1

D.
+2

Answers

The correct answer is answer choice C. +1. Since electrons have negative charges, losing one electron will cause the atom to have a positive charge of 1. This charge comes from the protons, which, until one electron was lost, balanced out the negative charge of the electrons and caused the atom to be neutral.

Which is an example of a decomposer a hawk a mouse a flower or a mushroom

Answers

A mushroom is a decomposer

A mushroom definetly

true or false? constructive interfernce occurs when a crest meets up with another crest at a given location along the medium

Answers

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A converging lens can produce both real and virtual images depending on the position of the object. Explain when converging lenses can produce virtual images and describe the image produced.A) A virtual image is produced if the object is on the focal point, the image is upright, enlarged and on the same side of the lens as the object.

B) A virtual image is produced if the object is on the focal point, the image is inverted, enlarged and on the opposite side of the lens from the object.

C) A virtual image is produced if the object is between the focal point and the lens, the image will be upright, enlarged and on the same side of the lens
as the object.

D) A virtual image is produced if the object is between the focal point and the
lens, the image will be upright, reduced and on the opposite side of the
lens from the object.

Answers

A virtual image is produced if the object is between the focal point and the lens.

What is a converging lens?

A converging lens is a lens that can produce both real and virtual images depending on the position of the object.

A virtual image is produced if the object is between the focal point and the lens, the image will be upright, enlarged and on the same side of the lens as the object.

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Answer: C

Explanation:

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