The winter solstice, the shortest day of the year in the Northern hemisphere, occurs when the Earth is in which position?

Answer: 6899

Explanation:

The mass of a chair that weighs 118 Newtons is 12.04kg

HOW TO CALCULATE MASS:

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Answer:

Gravitational force

Explanation:

Hope this helps :)

Answer:

1.622m/s²

Explanation:

Given the following

mass of 7.36 × 10²² kg

Radius r = 1.74×10^6m

Gravitational constant G = 6.67×10^-11

Acceleration due to gravity us expressed as:

g = GM/r²

Substitute the given values into the formula

g = 6.67×10^-11×7.36 × 10²²/(1.74×10^6)²

g = 49.0912×10¹¹/3.0276×10¹²

g = 16.22×10^{11-12}

g = 16.22×10^-1

g = 1.622m/s²

Hence the acceleration due to gravity on the Moon is 1.622m/s²

1.

6090 J

2.

622 J

I bet so~

Answer:

Radio Waves

Explanation:

Answer:

a)

two like charges always repel each other while two unlike charges attract each other. Since the spring stretches by 0.039 m, the charges have the same sign. both charges are positive(+) or Negative (-)

b)

both q1 and q1 are 8.35 × 10⁻⁶ C or -8.35 × 10⁻⁶ C

Explanation:

Given that;

L = 0.26 m

k = 180 N/m

x = 0.039 m

a)

we know that two like charges always repel each other while two unlike charges attract each other. Since the spring stretches by 0.039 m, the charges have the same sign.

b)

Spring force F = kx

F = 180 × 0.039

F = 7.02 N

Now, Electrostatic force F = Keq²/r²

where r = L + x = ( 0.26 + 0.039 )

we know that proportionality constant in electrostatics equations Ke = 9×10⁹ kg⋅m3⋅s−2⋅C−2

so from the equation; F = Keq²/r²

Fr² = Keq²

q = √ ( Fr² / Ke )

we substitute

q = √ ( 7.02 N × ( 0.26 + 0.039 )² / 9×10⁹ )

q = √ ( 7.02 N × ( 0.26 + 0.039 )² / 9×10⁹ )

q =  √ (0.627595 / 9×10⁹)

q = √(6.97 × 10⁻¹¹)

q = 8.35 × 10⁻⁶ C

Therefore both q1 and q1 are 8.35 × 10⁻⁶ C or -8.35 × 10⁻⁶ C

Answer:

t = 3.88 seconds

Explanation:

Given that,

A ball is thrown horizontally from the top of a 73.9-m building and lands 183 m from the base of the building.

We need to find the time for which the ball is in air. Let the time be t.

[tex]y=y_o+ut+\dfrac{1}{2}at^2[/tex]

Here, a = -g, [tex]y_o=73.9\ m[/tex] and y = 0

u is initial velocity, u = 0

[tex]y_o=\dfrac{1}{2}gt^2\\\\t=\sqrt{\dfrac{2y_o}{g}}\\\\t=\sqrt{\dfrac{2\times 73.9}{9.8}}\\\\t=3.88\ s[/tex]

So, the ball is in the air for 3.88 seconds.

Answer:

a1 = -2.89 units

a2 = 3.17 units

magnitude = 4.2896 units

direction = 132.35 degrees

Explanation:

We can write the vector in component form as: <-2.89, 3.17>

That means that its i and j components are:

a1 = -2.89 units

a2 = 3.17 units

The magnitude of the vector is given by:

[tex]\sqrt{(-2.89)^2 +3.17^2} \approx 4.2896[/tex]

The vectors direction can be found from the tangent function, ad noticing that the vector must reside on the Second Quadrant:

[tex]arctan(-3.17/2.89) + 180^o\approx 132.35^o[/tex]

Answer:

The work done is 5880 J

Explanation:

Recall the formula for work as force times distance, therefore in this case the force is that oppose to the gravitational force on the car(of magnitude m * g), and the distance is 0.5 meters.

Then:

Work = 1200 * 9.8 * 0.5 J = 5880 J

Answer:

2 rad/s²

Explanation:

From the question given above, the following data were obtained:

Mass (m) = 1 Kg

Radius (r) = 0.2 m

Angular speed (w) = 20 rad/s

Time (t) = 10 s

Angular acceleration (a) =?

Angular acceleration is defined as:

Angular acceleration (a) =Angular speed (w) / time

a = w/t

With the above formula, we can obtain the angular acceleration of the sphere as follow:

Angular speed (w) = 20 rad/s

Time (t) = 10 s

Angular acceleration (a) =?

a = w/t

a = 20 / 10

a = 2 rad/s²

Thus, the angular acceleration of the sphere is 2 rad/s²

Answer: Nuclear energy is energy in the nucleus (core) of an atom.

Explanation: Atoms are tiny particles that make up every object in the universe. ... In nuclear fission, atoms are split apart to form smaller atoms, releasing energy. Nuclear power plants use nuclear fission to produce electricity.

Answer:

energy level

s,p

electrons

Explanation:

I already done this trust me

In the notation 1 s² number 1 represents energy levels where electrons are located.The 4 parts on periodic table are s,p,d and f blocks.The 2 in 1 s² represents number of electrons in energy level.

Electrons present in an atom revolve in different orbits which are stationary states and are also called as energy levels. The energy levels are numbered as integers which are also called as principal quantum numbers.

Energy of the stationary state is given as E= -R

1/n² where R

is the Rydberg's constant. When an electron is excited, and it moves from lower to higher energy levels there is absorption of energy, while when it moves from higher energy level to lower energy level it radiates or gives out energy in the form of radiation.

They can also be defined as the distances between electron and nucleus of an atom . Electrons present in K energy level have least energy .Energy level diagrams are studied to understand nature of bonding , placement of electrons in orbits and and elemental behavior under certain conditions.

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Answer:

a) ∑ tau = - 1.9965 N m , b) α = 0.587 rad / s²,  c) F₁ = 5.09 N

Explanation:

a) the torque is given by the expression

             Σ τ = Σ F x r

for this case we assume that the counterclockwise rotations are positive

In the problem, the right arm F₁ = 55 N applied at a distance x₁= 0.04m and the weight of the forearm mass W = 1.84 kg applied to x₂ = 0.11 m gives us two forces, this force has to create a rotation counterclockwise thereby creating positive torque

           ∑ tau = -F₁ x₁ + W x₂

           ∑ tau = - 55 0.04 + 1.85 0.11

           ∑ tau = - 1.9965 N m

b) the angular acceleration can be obtained from Newton's second law for rotations

          τ = I α

           α = τ/I

           α = 1.9965 / 3.4

           α = 0.587 rad / s²

c) what is the strength of the biceps to maintain balance

           ∑ τ = 0

           -F₁ x₁ + W x₂ = 0

            F₁ = [tex]\frac{x_{2} }{ x_{1} }[/tex]  W

            F₁ = [tex]\frac{0.11}{0.04}[/tex]  1.85

            F₁ = 5.09 N

Answer:

All atoms have a dense central core called the atomic nucleus. Forming the nucleus are two kinds of particles: protons, which have a positive electrical charge, and neutrons, which have no charge. All atoms have at least one proton in their core, and the number of protons determines which kind of element an atom is.

Explanation:

Answer:

skalarna wielkość fizyczna charakteryzująca stan układu fizycznego (materii)

jako jego zdolność do wykonania pracy

Answer: B

Explanation: because x is 19.4 and then the y is m/s north

Two ways electromagnetic waves are used in a home computer scanner are:

In terms of science, electromagnetic radiation (EMR) is made up of electromagnetic (EM) field waves that travel over space while carrying electromagnetic radiant energy. It consists of X-rays, gamma rays, microwaves, infrared, visible light, ultraviolet, and radio waves. These waves are all a component of the electromagnetic spectrum.

Electromagnetic waves, which are synchronised oscillations of the electric and magnetic fields, are the traditional form of electromagnetic radiation. The electromagnetic spectrum is created at various wavelengths depending on the oscillation frequency. Electromagnetic waves move at the speed of light in a vacuum.

Hence, option (A) and (B) are correct.

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Answer:

A person believes crossing his fingers brings good luck despite studies demonstrating that it does not.

Explanation:

Hope it helps!

Answer:

physical quantity is a property of a material or system that can be qualified by measurement

[tex] \huge\mathfrak{ANSWER}[/tex]

the quantities by meals of which we describe the law of physics are known as physical quantities.

in order to measure a physical quantity we as you my certain magnitude of this quantity a standard and call its unit of that quantity to express the measurement of any physical quantity two thing must be mentioned.

For Example -:

[tex] \bold{ n_1 (u_1) = n_2(u_2)}[/tex]

Explanation:

if u apply more force to an object, it accelerates at a higher rate

1 m = 1000 mm

So, 7.6 m = 7.6 × 1000 mm = 7600 mm

Given :

Change in internal energy is, ΔE = 10 J.

Heat transferred to the system is, Q = 10 J.

To Find :

The work done by the system.

Solution :

We know, by 1st law of thermodynamics :

ΔE = W + Q

W = ΔE - Q

W = 10 - 10 J

W = 0 J

Therefore, work done by the system is 0 J.

Answer:

0 atomic mass because it widens as the numerical value represents

Answer: ATOMIC MASS

Explanation:

I got it right

Answer:

B

Explanation:

Industrial Society

Answer:

450m

Explanation:

[tex]s = ut + \frac{1}{2} a {t}^{2} \\ s = 0 + t + \frac{1}{2} a {t}^{2} \\ \frac{1}{2 } \times 9 \times {10}^{2} = 450m[/tex]