What is one of Kepler's laws of planetary motion?


a.Planets move on elliptical orbits with the Sun at one focus.

b.Gravitational force between two objects decreases as the distance is squared.

c.An object in motion remains in motion.

d.Inner planets orbit in the opposite direction of outer ones.

Answer:

Eight planets.

1. Mercury

2. Venus

3. Earth

4. Mars

5. Jupiter

6. Saturn

7. Uranus

8. Neptune

Increase in speed leads to increase in kinetic energy

Answer:

P = 3 Pa

Explanation:

Given that,

Force exerted by the car, F = 9 N

The area of the car, A = 3 m²

We need to find the pressure exerted by the car. We know that pressure is equal to the force per unit area such that,

[tex]P=\dfrac{F}{A}\\\\P=\dfrac{9\ N}{3\ m^2}\\\\P=3\ Pa[/tex]

So, the pressure exerted by the car is equal to 3 Pa.

Answer:

The mass of the 500 series bullet train is 181.4 tonnes.

Explanation:

The momentum is given by:

[tex] p = mv [/tex]

Where:

m: is the mass =?

v: is the velocity = 261.8 km/h

p: is the momentum = 13194098.64 kg*m/s

By solving the above equation for "m" we have:

[tex]m = \frac{p}{v} = \frac{13,194,098.64 kg*m/s}{261.8 km/h*\frac{1000 m}{1 km}*\frac{1 h}{3600 s}} = 181.4 tonnes[/tex]

Therefore, the mass of the 500 series bullet train is 181.4 tonnes.

I hope it helps you!                

Answer:

The direction of motion of the ball is approximately 68.199º below the +x semiaxis.

Explanation:

The ball has a two-dimension motion, to be exact, a parabolical motion, that is, a motion at constant velocity in the x-direction and free fall motion in the y-motion. Hence, the horizontal velocity of the basketball is 12 meters per second and its direction ([tex]\theta[/tex]), in sexagesimal degrees, is calculated by this trigonometrical expression:

[tex]\theta = \tan^{-1} \frac{v_{y}}{v_{x}}[/tex] (1)

Where:

[tex]v_{x}[/tex] - Horizontal velocity, in meters per second.

[tex]v_{y}[/tex] - Vertical velocity, in meters per second.

If we know that [tex]v_{x} = 12\,\frac{m}{s}[/tex] and [tex]v_{y} = -30\,\frac{m}{s}[/tex], then the direction of motion of the ball is:

[tex]\theta \approx 68.199^{\circ}[/tex] (below the +x semiaxis)

The direction of motion of the ball is approximately 68.199º below the +x semiaxis.

The puppy was not moving relative to Daylon, the wagon, or his collar.

He was moving relative to a point on the sidewalk.

Note that the puppy did NOT get his walk.

Answer:

Displacement = [tex]13.45\ \text{miles}[/tex]

Explanation:

Given that,

Michael walks 9 miles South to pick up his latte. He then drives 10 miles east to COHEA.

We need to find the displacement of Michael. We know that displacement is the shortest path covered by the object. In this case, it is given by :

[tex]d=\sqrt{10^2+9^2} \\\\d=13.45\ \text{miles}[/tex]

So, the displacement of Michael is equal to [tex]13.45\ \text{miles}[/tex].

Answer:

3

ExplSpanisshh

Answer:

Acceleration

Explanation:

Momentum is acceleration because acceleration is movement and momentum is movement.

Momentun = Movement

Acceleration = Movement

Momentum = Acceleration

Answer:

The first one is C, and the second is not clear please show another photo

Explanation:

Answer:

A differentiated body is a body that has been heated to the point where it is are further from the sun larger have no solid surface and have many more moons  Smaller chunks of material vaporize completely as they pass through its atmosphere

Explanation:

A body is said to be differentiated when it has been heated to the extent where it is bigger, farther from the sun, has no hard surface, and has a lot more moons. Smaller pieces of the materials entirely evaporate as they pass through their environment.

An enormous, spherical celestial object known as a planet is neither a star nor a remain. The nebular theory, which states that an interstellar cloud collapses out of a nebula to form a young protostar that orbits the sun by a protoplanetary disk, is now the best argument for planet formation. By slowly accumulating material under the influence of gravity, or accretion, planets form in this disk.

The terrestrial planets Mercury, Venus, Earth, and Mars, as well as the planetary nebulae Jupiter, Saturn, Uranus, and Neptune, total at least eight planets in the Solar System. These planets all rotate around axes that seem to be inclined relative to their corresponding polar axes.

To know more about Planet:

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Answer:

It is also the energy dissipated as heat when an electric current of one ampere passes through a resistance of one ohm for one second. It is named after the English physicist James Prescott Joule (1818–1889).

Explanation:

Answer:

98.

Explanation:

divide

The change in the kinetic energy of the cart is equal to 34875 J.

The energy which is possessed by a moving body because of its motion is known as kinetic energy. Work should be done in order to bring the change in the kinetic energy of a moving object.

The kinetic energy of a moving object can be determined from the formula mentioned below:

K.E. = ½mv²     where ‘m’ and 'v' is the mass and velocity of the object.

Given, the mass of the carriage, m = 450 Kg

The speed of the carriage, u = 18 m/s

The initial kinetic energy of the cart = (1/2) × 450 × (18)²

(K.E.)₁ = 72900 J

The final speed of the cart, v = 13 m/s

The final kinetic energy of of the cart = (1/2) × 450 × (13)²

(K.E.)₂ = 38025 J

The change in the kinetic energy of the cart = (K.E.)₂ - (K.E.)₁

Change in the kinetic energy = 72900 - 38025 = 34875 J

Learn more about kinetic energy, here:

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Answer:

ΔK = -6 10⁴ J

Explanation:

This is a crash problem, let's start by defining a system formed by the two trucks, so that the forces during the crash have been internal and the moment is preserved

initial instant. Before the crash

        p₀ = m v₁ + M 0

final instant. Right after the crash

        p_f = (m + M) v

        p₀ = p_f

        mv₁ = (m + M) v

        v = [tex]\frac{m}{m+M} \ v_1[/tex]

we substitute

        v = [tex]\frac{20}{20+40}[/tex]   3

        v = 1.0 m / s

having the initial and final velocities, let's find the kinetic energy

        K₀ = ½ m v₁² + 0

        K₀ = ½ 20 10³ 3²

        K₀ = 9 10⁴ J

        K_f = ½ (m + M) v²

        K_f = ½ (20 +40) 10³  1²

        K_f = 3 10⁴ J

the change in energy is

       ΔK = K_f - K₀

       ΔK = (3 - 9) 10⁴

       ΔK = -6 10⁴ J

The negative sign indicates that the energy is ranked in another type of energy

Answer:

           h = h₀/2,  the liquid column rises half the height

Explanation:

Pressure is defined as force per area,  

         P = F / A

in a barometer the force is the weights of the liquid column

         F = W = mg

         P = m g/A

if we use the definition of density

         ρ = [tex]\frac{m}{A h}[/tex]

         [tex]\frac{m}{A}[/tex] = ρ h

we substitute

         P = ρ g h

Let's use the index o for the mercury

         P₀ = ρ₀ g h₀

when we change the liquid for another with

          ρ = 2ρ₀

the pressure expression is

         P = 2ρ₀ g h

in the problem they indicate that the pressure is equal to the initial P = P₀

we substitute

           ρ₀ g h₀ = 2ρ₀ g h

           h₀ = 2h

           h = h₀/2

the liquid column rises half the height

Hii!!! The correct answer is true. (:

Answer: 59.5 deg

Explanation: In this problem, we are giving 1.31 as n2 and 1.52 as n1. Using the formula of critical angle= arcsine(n2/n1) we get the equation critical angle=arcsine(1.31/1.52) from there, you divide 1.31 by 1.52, and get 0.862.

On your calculator you then should press 2nd and then the sine button to get sine^-1 (arcsine) and in the parenthesis after arcsine put in 0.862, the answer you get will be 59.5.

Answer:

(a) RC time constant of the circuit is 6.9 × 10⁻⁶ ms

(b) The potential drop across the capacitor 1.00 s after the switch is closed is 0 V

Explanation:

The given parameters are

The length of the graphite pencil, L = 5.00 cm

The diameter of the graphite, D = 0.05 mm

The resistivity of the graphite, ρ = 1.38 × 10⁻⁵ Ω/m

The capacitance of the capacitor, C = 10.0 mF

The voltage of the power source, V = 0.50-V

(a) The RC time constant of the circuit, τ, is given as follows;

τ = R × C

Where;

R = The resistance of the graphite = L × ρ

C = The capacitance of the capacitor

∴ R = 5.00 cm × 1.38 × 10⁻⁵ Ω/m = 6.9 × 10⁻⁷ Ω

RC time constant of the circuit, τ = 6.9 × 10⁻⁷ Ω × 10.0 mF = 6.9 × 10⁻⁶ ms

RC time constant of the circuit, τ = 6.9 × 10⁻⁶ ms

(b) The potential drop after t = 1.00 s is given as follows;

[tex]i = \dfrac{V}{R} \cdot e^{-\dfrac{t}{R\cdot C} }[/tex]

Where;

I = The current in the circuit

V = The voltage in the circuit = 0.50 V

R = resistance in the circuit = 6.9 × 10⁻⁷ Ω

C = The series capacitance = 10.0 mF

t = The time taken = 1.00 s

Plugging in the variable values, gives;

[tex]I = \dfrac{0.5}{6.9 \times 10^{-7}} \cdot e^{-\dfrac{1.00}{6.9 \times 10^{-7}\times 10.0 \ mF} } = 0[/tex]

V(1) = I·R = 0 × R = 0

The potential drop across the capacitor 1.00 s after the switch is closed, V(1)  = 0 V

Answer:

326 kg

Explanation:

m=f/a

3000/9.2=326 kg

Answer:

Hope this helps!! :D

Explanation:

Mechanical energy is power that an object gets from its position and motion. the energy released during nuclear fission or fusion, typically to make electricity.

Thermal energy is the energy given off by hot things like fire.

Chemical energy is energy stored in the bonds of chemical compounds.

Electromagnetic energy is a form of energy that is reflected or emitted from objects in the form of electrical and magnetic waves that can travel.

Electrical energy is energy derived from electric potential energy or kinetic energy.

Nuclear energy is the energy released during nuclear fission or fusion, typically used to generate electricity.

Answer:

0.6m

I hope this help a little bit.

Answer:

The kinetic energy of photoelectrons at the surface grows linearly with the increasing frequency of incident radiation. Measurements for all metal surfaces give linear plots with one slope.

Answer:

acceleration due to gravity: -9.8 m/s^2

Fg=mass of object*(-9.8)

Explanation:

This is a pretty vague question, but I'll answer as best I can.

All matter has gravity. YOU have gravity, although your gravitational pull is small. So, the force of attraction between the Earth and an object on Earth is modeled as

Force of gravity=(Gravitational constant*mass of object 1*mass of object  2)/distance between objects squared

Note that distance between an object on Earth and Earth is the radius of Earth (distance to Earth's core/center of mass)