normally, 100% of the star's light reaches us. estimate how much light reached us during the transit. be sure to report to 4 decimal places. therefore, how much light was blocked by the planet?

Answer:

The speed of the flow of water in the river is 4 m/s.

Explanation:

Given that,

Speed of man = 5 m/s

If this man swims crosses a specific river his speed is 3 m/s.

If he takes the minimum time to cross the river

Let the speed of flow of water be \(v_{r}\)

We need to calculate the speed of the flow of water in the river

Using formula for velocity

\(v_{rs}^2=v_{r}^2+v_{s}^2\)

\(v_{r}^2=v_{rs}^2-v_{s}^2\)

Where, \(v_{s}\) = velocity of swimmer

\(v_{sr}\) = relative velocity

\(v_{r}\) = velocity of river

Put the value into the formula

\(v_{r}^2=5^2-3^2}\)

\(v_{r}=\sqrt{5^2-3^2}\)

\(v_{r}=4\ m/s\)

Hence, The speed of the flow of water in the river is 4 m/s.

my views

Explanation:

Figure (8) shows a rod made up of copper and wood joined together. The rod is heated at the joint in the centre for about a minute. At which point – A, B, C or D, would it show the lowest temperature? PLEASE GIVE REASONS ALSO(MINIMUM 2)

Surprisingly fast orbital speeds are seen for stars located far from the galactic centre.

The quantity of material in a particle or object is represented by the dimensionless quantity mass (symbolised m). The kilogramme is the International System's (SI) preferred unit of mass (kg).

While force, mass, and acceleration are generic terms, they are frequently employed incorrectly. When a physical influence named force is imparted to an item, the object accelerates in the location the force was applied from. An object's mass, which is measured in kilogrammes, is the mass it contains.

Finally, it may be said that the photon, which has no mass, can exert force through its momentum. Care must be used while doing experimental verification because a force may be delivered through absorption or reflection.

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The best way to calculate the volume of a log with a serious defect is to calculate the volume of the defect and subtract it from the total volume of the log which is denoted as option C.

This is referred to as the amount of space occupied by any three-dimensional solid which could be a square, rectangle etc.

In a scenario where a defect is present in the log, then it is  best to consider it by first calculating the volume of the defect after which it is then subtracted from the total volume of the log in other to give an accurate result.

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Answer:

P = 2 pi (L / g)^1/2

Let 1 represent earth and 2 the moon

P2^2 / P1 ^2 = L2 g1 / (L1 g2)       dividing equations

L2 = (P2 / P1)^2 * g2 / g1 * L1

L2 = 1 * 1.62 / 9.80 * 1.9 = .314 m

Explanation:

300 second = 5 minutes

details

500 watts = 500 joules per second

Time = (1.50 x 10^5 joules)/(5 x 10^2 joules per second) = .3 x 10^3 seconds =300 second

Answer:

h

Explanation:

Coulomb's law, or Coulomb's inverse-square law, is an experimental law[1] of physics that quantifies the amount of force between two stationary, electrically charged particles. The electric force between charged bodies at rest is conventionally called electrostatic force or Coulomb force.[2] The law was first discovered in 1785 by French physicist Charles-Augustin de Coulomb, hence the name. Coulomb's law was essential to the development of the theory of electromagnetism, maybe even its starting point,[1] as it made it possible to discuss the quantity of electric charge in a meaningful way.[3]

The law states that the magnitude of the electrostatic force of attraction or repulsion between two point charges is directly proportional to the product of the magnitudes of charges and inversely proportional to the square of the distance between them,[4]

{\displaystyle F=k_{\text{e}}{\frac {q_{1}q_{2}}{r^{2}}}}{\displaystyle F=k_{\text{e}}{\frac {q_{1}q_{2}}{r^{2}}}}

Here, ke is Coulomb's constant (ke ≈ 8.988×109 N⋅m2⋅C−2),[1] q1 and q2 are the signed magnitudes of the charges, and the scalar r is the distance between the charges.

The force is along the straight line joining the two charges. If the charges have the same sign, the electrostatic force between them is repulsive; if they have different signs, the force between them is attractive.

Being an inverse-square law, the law is analogous to Isaac Newton's inverse-square law of universal gravitation, but gravitational forces are always attractive, while electrostatic forces can be attractive or repulsive.[2] Coulomb's law can be used to derive Gauss's law, and vice versa. In the case of a single stationary point charge, the two laws are equivalent, expressing the same physical law in different ways.[5] The law has been tested extensively, and observations have upheld the law on the scale from 10−16 m to 108 m.[5]

A scientific law is an established principle that explains a phenomenon or behavior in the natural world. It is a concise statement that summarizes the results of many observations and experiments and is widely accepted as true because it has been confirmed over and over again.

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Explanation:

The equation 2y = 8 sin (4πt) is a general equation for a particle vibrating in simple harmonic motion. The amplitude of the oscillations is given by the coefficient of the sine term, which is 8 in this equation. Therefore, the amplitude of the particle vibrating in simple harmonic motion is 8 cm.

The angular frequency is given by the coefficient of the variable t, which is 4π in this equation. Therefore, the angular frequency of the particle vibrating in simple harmonic motion is 4π rad/s.

Therefore, the answer is (b) 4 cm and 4π rad.

Answer:

c

Explanation:

Answer:

at the top of the ramp before dropping in

Explanation:

Potential energy is basically the build up of energy before it's released.

Answer:

https://www.khanacademy.org/science/physics/work-and-energy/work-and-energy-tutorial/a/what-is-conservation-of-energy

Explanation:

Look at this website it gives you all the details! :)

Answer:

Ekaryote cells

an organism consisting of a cell or cells in which the genetic material is DNA in the form of chromosomes contained within a distinct nucleus. Eukaryotes include all living organisms other than the eubacteria and archaea.

prokaryote cells

microscopic single-celled organism which has neither a distinct nucleus with a membrane nor other specialized organelles, including the bacteria and cyanobacteria

The greatest number of beats your heart can pump in one minute is option B: Heart Rate.

Your heart beats on average between 60 to 100 times per minute for adults, which is what is known as your heart rate.

Your body adjusts your heart rate naturally to match what you're doing or what's going on around you. Because of this, your heart rate increases at times of activity, excitement, or fear and decreases during times of rest, serenity, or comfort.

Note that your heart rate is a crucial sign of your general health. A high or slow heart rate may indicate a cardiac condition or other health issues. Having the ability to feel your heartbeat all around your body may also help doctors identify medical issues.

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Answer:

C

Explanation

Maximum Heart Rate

Answer:

C

Explanation:

So im not saying this is 100% the answer but from what i read everything else was an inference and watching bubbles form when mixing chemicals made more sense as a observation to me

Answer:

its  A. because since heat energy means thermal i think it is A and also When friction acts between two surfaces that are moving over each other, some kinetic energy is transformed into heat energy.

Explanation: your welcome and i hope its right

The basic difference is that the motion of object remain unchanged in case of balanced forces while it changes when an object experiences unbalanced forces

When the forces experienced by an object have equal strength and are acting in opposite directions, they are known as balanced forces while the forces those differ in strength and are probably acting in any direction except opposite, they are known as unbalanced forces.

The balanced forces cancel out each other, and the motion of the object remains unchanged but unbalanced forces can change the velocity or direction of a moving object

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Answer:

a = F / m = -960 / 320 = -3 m/s^2      force in opposite direction to acceleration

t = (V2 - V1) / a =(-20m/s) /(-3 m/s^2) = 6.67 s

S = V0 t + 1/2 a t^2

S = 20 * 6.67 - 3 / 2 * 6.67^2 = 66.7 m

Answer:

is 10³

Explanation:

cuz the formula of KE is 1/2mv²

covert 50g to kg first then plug in the formula

1/2 × 0.05 × 200 = 10³ J

Considering the coordinates of the radars as well as the direction of the object in order to determine the object's position in terms of distance and angle. Sincе thе radars arе situatеd at (0,0) and thе sеcond radar is on thе еast sidе of thе first onе, wе can assumе that thе first radar is locatеd on thе x-pivot and thе sеcond radar is locatеd on thе positivе y-hub.

Lеt's say thе objеct is dеtеctеd at coordinatеs (x, y). The objесt's y-coordinativity will be negative and its x-coordinativity positive as it approaches the southern direction in the first quadrant.

We can use the distancе formula to determine the object's diameter from its origin (0, 0):

Distancée = (x + y) 2 The angle can be calculated with trigonometry. The angle can be summarized as:

= arctan(y/x) ii) We must consider the circles of overlap for each radar in order to calculate the overlap from the radar signal intersection in the first quadrant.

Due to the fact that both radars have distinctive overlap and divide the covered area into circles, the overlapped area will be the intersection of these circles.

Thе ovеrlapping arеa can bе calculatеd by finding thе arеa of thе intеrsеction of two circlеs. The formula for the area of the intersection of two circles can be complex and depends on the specific radii and dimensions that exist between the circles' centers.

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The area would be 13.1429 Meter².

Answer:

\(\boxed {Area = 13.14 m^{2}}\)

Explanation:

Formula applied :

\(\boxed {Area = \frac{Pressure}{Force}}\)

Given :

Solving :

Sound waves are produced when something is caused to vibrate.

This can be defined as the pattern of disturbance caused by the movement of energy traveling through a medium.

Sound is produced when a substance vibrates leading to movement in surrounding air molecules.

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A DC motor is powered with Ea = 400V, the armature resistance is Ra = 20, the torque constant of the motor is K+ = 1 Nm/A.

The load torque intercepts the motor torque in two places, only one will be positive, drop you will again need to solve = 0. d the given details are Ea = 400VRa = 20K+ = 1 Nm/A

To find; Gear ratio G required to drive this load at its maximum operating speed.

Formula used: θ=K+ * Ia The motor torque, Tm = K+ * Ia The load torque, TL = J * dw / G The armature current, Ia = (Ea - V) / Ra By equating the motor torque and load torque, we have; K+ * Ia = TL The load torque is positive, so we have;TL = J * dw / G Since the load is operating at maximum speed, d w = 0So, TL = 0 = J * 0 / G

Thus, G is not found in the equation.

So, we can conclude that G does not affect the maximum speed of the motor. The maximum speed is determined by the back EMF, Ea, and the motor constants, K+ and Ra.

So, the gear ratio G is irrelevant in determining the maximum speed of the motor.

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Answer:

i think answer is c

Explanation:

as formation water from steam condensed release heat

else all need heat

The radius of the hoop is determined as 1.0 m.

The radius of the hoop is calculated by applying the formula for the period of a simple harmonic motion as follows;

T = 2π √(L/g)

Where;

Make the length, L the subject of the formula;

L = (gT²)/(4π²)

L = (9.8 x 2²) / (4π²)

L = 1 m

Thus, if we must hang a thin hoop on a horizontal nail and have the hoop make one complete small- angle oscillation each 2.00 s, then the hoop’s radius must be 1 m.

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Answer:

A gravitational force exerted by an object on another is a force.

Explanation:

hope it helps

Answer:

i) Power = Force * Velocity = 1100 * 15 = 16500 W = 16.5 kW(ii)  Find the value of k first: F = 400 + k(15^2)                                              k = 28/9    F = 400 +(28/9)(30^2) = 320

Explanation:

Temperature best describes the measurement of the energy in molecules of air in a given area.

Temperature is a bodily quantity that expresses quantitatively the perceptions of hotness and coldness. Temperature is measured by using a thermometer. Thermometers are calibrated in diverse temperature scales that historically have trusted various reference points and thermometric materials for definition.

Temperature plays a vital role in hospital treatment (each people and animals), food, drinks, and agriculture. Our typical health is often reliant upon temperature in many methods as properly. Preserving right temperature degrees in medical cold garage areas is crucial.

The SI unit of temperature as in line with the international machine of units is Kelvin that's represented by the symbol K.

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Answer: 3.775 KG

Explanation:  W = 37 N

                        m = ?

               AS WE KNOW THAT

                        W = mG

                         37 = m 9.8

                         m = 37/9.8

                          m = 3.775 KG