A salmon jumps up a waterfall 2.4 m high. With what minimum speed did the salmon
leave the water below to reach the top?
0 10 m/s
O 26 m/s
O 5 m/s
O 6.9 m/s

Answer: C.

Explanation:  Abrasion is where two things rub together causing friction, which in turn wears the rock down.

The Sun transforms into a red giant when all of the hydrogen inside has undergone fusion.

Energy:

When lighter and heavier nuclei combine through nuclear fusion, the process takes place. During this process, a tremendous amount of energy is generated.

Fusion between hydrogen atoms produces helium. There will be some internal changes following the conversion of a sizable percentage of their hydrogen to helium.

As it gets hot enough, the interior core collapses. Helium will also combine with the carbon at the same moment to create oxygen. A sufficient amount of hydrogen is also present outside the core to fuse into more helium. The Sun turns into a red giant after that.

To know more about energy , visit:

https://brainly.com/question/1932868

#SPJ1

Answer:

Explanation:

Answer:

D.1.4 hours

Explanation:

\(d\ =\ vt\)

\(t\ =\ \frac{d}{v}\)

\(t\ =\ \frac{100}{70}\)

\(t\ =\ 1.42857142857\)

Therefore, the answer is D 1.4 hours

(a) The intensity of a laser beam used to burn away cancerous tissue is 3.59 × 10⁷ W/m².

(b) The intensity of the laser beam is much higher than the average intensity of sunlight which could cause severe damage or blindness.

(a) To calculate the intensity of the laser beam, we first need to determine the energy absorbed by the tissue, which is 90.0% of the total energy.

Total energy absorbed = 0.9 × 500 J = 450 J

Next, we find the area of the circular spot:

Area = π × (diameter/2)² = π × (0.002 m / 2)² ≈ 3.14 × 10⁻⁶ m²

Now, we can calculate the intensity of the laser beam:

Intensity = (Energy absorbed) / (Area × Time)
Intensity = (450 J) / (3.14 × 10⁻⁶ m² × 4 s) ≈ 3.59 × 10⁷ W/m²

(b) The intensity of the laser beam (3.59 × 10⁷ W/m²) is much higher than the average intensity of sunlight (700 W/m²). If the laser beam entered your eye, it could cause severe damage or blindness due to the extremely high intensity. The extent of damage depends on the duration of exposure; longer exposure to the laser beam would result in more severe damage.

Learn more about laser beam here: https://brainly.com/question/13071147

#SPJ11

8n downwards

since downwards force is greater than upwards just minus

Answer:

A barcode reader (or barcode scanner) is an optical scanner that can read printed barcodes, decode the data contained in the barcode and send the data to a computer. Like a flatbed scanner, it consists of a light source, a lens and a light sensor translating for optical impulses into electrical signals.

Explanation:

A barcode reader (or barcode scanner) is an optical scanner that can read printed barcodes, decode the data contained in the barcode and send the data to a computer. Like a flatbed scanner, it consists of a light source, a lens and a light sensor translating for optical impulses into electrical signals.

The value of the shunt resistance Rs is calculated to be approximately (1.02 Ω).To convert a galvanometer into an ammeter with a maximum reading value of 500 mA, a shunt resistance (Rs) needs to be added.

The value of the shunt resistance can be calculated using the formula Rs = (RG * IMax) / (IMax - Max), where RG is the internal resistance of the galvanometer, IMax is the maximum deflection current of the galvanometer (15 mA), and Max is the desired maximum current reading of the ammeter (500 mA).

To convert a galvanometer into an ammeter, a shunt resistance is connected in parallel with the galvanometer.

The shunt resistance diverts a portion of the current, allowing the remaining current to flow through the galvanometer.

By choosing an appropriate value for the shunt resistance, the ammeter can be calibrated to measure higher currents.

In this case, the shunt resistance value (Rs) can be determined using the formula Rs = (RG * IMax) / (IMax - Max), where RG is the internal resistance of the galvanometer, IMax is the maximum deflection current of the galvanometer (15 mA), and Max is the desired maximum current reading of the ammeter (500 mA).

Substituting the given values,

we have Rs = (RG * 15 mA) / (15 mA - 500 mA). Simplifying further, Rs = (RG * 15 mA) / (-485 mA).

Rearranging the equation,

we get Rs = - RG * (15 mA / 485 mA). Since RG is given as (RG-59), we substitute it into the equation to obtain Rs = - (RG-59) * (15 mA / 485 mA).

The result of this calculation gives us the value of the shunt resistance Rs, which is approximately 1.02 Ω. Therefore, a shunt resistance of approximately 1.02 Ω should be added in parallel with the galvanometer to convert it into an ammeter with a maximum reading value of 500 mA.

Learn more about shunt resisitance from the given link:

https://brainly.com/question/31811502

#SPJ11

Throughout the race, sprinters must stay in their allotted lanes and are not permitted to cross them. They begin the 800-meter race in varying positions and have the opportunity to break ahead after the first curve.

Studies show that running at a moderate speed for just just few minutes each day can help reduce your risk of dying from common illnesses including strokes and heart attacks. The same study does, however, also demonstrate that these benefits cease to exist after four hours per week, undermining the necessity of regular long runs.

Between two and four runs per week, lasting around twenty to thirty minutes (or 2 to 4 miles each), are recommended for new runners. You may be familiar with the 10% Rule, but running more frequently every other week is a superior strategy for increasing your mileage. Your body will be assisted in adjusting to your.

To know more about sprinters visit:

https://brainly.com/question/5646238

#SPJ1

Answer:

transferred from one object to another. Charged objects can exert forces on other charged ... Electric charge can be measured using the law for the forces between charges

The electric force exerted by the +2 C on another +2 C when at a distance of 25 m is 5.76×10⁷ N

F = Kq₁q₂ / r²

Where

F = Kq₁q₂ / r²

F = (9×10⁹ × 2 × 2) / (25)²

F = 36×10⁹ / 625

F = 5.76×10⁷ N

Learn more about Coulomb's law:

https://brainly.com/question/506926

Answer:

Amy's speed is 2/3 faster than Bill's

Explanation:

can't believe you don't know how to do this.

Answer:

a) y = 103.21 m

b) t = 4.6 s

Explanation:

a) The height at which the balls was is given by:

\( V_{f}^{2} = V_{0}^{2} - 2g(y_{f} - y_{0}) \)

Where:

\(y_{f}\): is the final height = 0

\(y_{0}\): is the initial height =?

\(V_{f}\): is the final velocity = 45 m/s

\(V_{0}\): is the initial velocity = 0 (is held at rest

g: is the gravity = 9.81 m/s²          

Hence, the height is:

\( y_{0} = \frac{V_{f}^{2}}{2g} = \frac{(45 m/s)^{2}}{2*9.81 m/s^{2}} = 103.21 m \)

b) The time before the ball hit the ground is:

\( V_{f} = V_{0} - g*t \)

\( t = -\frac{V_{f}}{g} = -\frac{- 45 m/s}{9.81 m/s^{2}} = 4.6 s \)

Therefore, 4.6 seconds passed before the ball hit the ground.

I hope it helps you!  

Surface energy released when 1000 droplets of water of surface tension 0.07 N/m, each with a radius of 1 mm, combine to form a single drop is approximately \(8.82 * 10^-7 J.\)

When the 1000 droplets of water combine to form a single drop, the surface area of the resulting drop decreases. As a result, the surface energy of the drop decreases because the surface tension of water is a measure of the energy required to increase the surface area of the water.

The surface area of the combined droplets can be calculated using the formula for the surface area of a sphere:

A = \(4pi*r^2\)

where A is the surface area, and r is the radius of the individual droplets.

Substituting the known value of the radius, we get:

A =\(4pi*(0.001 m)^2\)

A ≈ \(1.26 * 10^-5 m^2\)

The surface energy of the combined droplets can be calculated using the formula:

E = σA

where E is the surface energy, and σ is the surface tension of water.

Substituting the known values, we get:

E = \((0.07 N/m) * (1.26 * 10^-5 m^2)\)

E ≈\(8.82 * 10^-7 J\)

Learn more about surface tension here:

https://brainly.com/question/24165264

#SPJ4

Answer:

I believe that this is a multiple choice answer so

Explanation:

The answer is D or,

"Some of the mass is converted into energy."

Answer : National Aeronautics and Space Administration

Problem : What does N.A.S.A stand for?

Explanation: NASA astronaut Christina Koch is pictured during a spacewalk. NASA stands for National Aeronautics and Space Administration. NASA was started on October 1, 1958, as a part of the United States government. NASA is in charge of U.S. science and technology that has to do with airplanes or space.

Hopefully this helps you!

Please find attached photographs for your answer.

Hope it helps.

Do comment if you have any query.

Explanation:

Let thermal capacity of the vessel be C' J K-1

Heat energy given by hot water = 40 x 4.2 x (60 - 30) = 5040 J

Heat energy taken by cold water = 50 x 4.2 x (30 - 20) = 2100 J

Heat energy taken by vessel = C' x (30 - 20) = 10 C' J

If there is no loss of heat energy,

Heat energy given by hot water = Heat energy taken by cold water and vessel

or 5040 = 2100 + 10 C'

or 10 C' = 2940

or C'= 294 J K-1

Thus, thermal capacity of vessel = 294 J K-1.

The worker's pull has both the horizontal and the vertical component that is : both magnitude and direction.

Draw the force vector graphically, then a horizontal and vertical line that forms a right triangle. It is possible to measure the connections between the horizontal and vertical lines graphically or alternatively by computation.

In mechanics, horizontal and vertical components are frequently seen.

Two forces that are mutually perpendicular to one another can be used to break down a force acting in one direction into its component parts.

Thus we will get the two components the vertical component being the N that is normal and the horizontal component is f = friction.

To know more about force you may visit the link:

https://brainly.com/question/13191643

#SPJ4

The maximum number of electrons that can occupy the third principal energy level is 18.

The number of orbitals associated with an energy level determines the maximum number of electrons that can exist at that level. Each orbital may accommodate a maximum of two electrons. Those electrons in an atom's highest energy level, known as the valence level, are the ones that give the atom its name. They are responsible for determining many of an atom's attributes, notably its level of reactivity.

Bohr and Bury came up with the formula 2n² to figure out the maximum number of electrons that can be accommodated in an orbit. This number may be found by using the formula.

In this case, we are given that the number of orbit (n) is 3.

Hence, the maximum number of electrons:

2n² = 2 × 3² = 18

To learn more about electrons, click here:

https://brainly.com/question/1758834

#SPJ4

The current through resistor R3 is 0.33 A. A circuit with three resistors connected in series is shown below: Circuit diagram of three resistors connected in series As per the given information, R2 has a resistance of 200 ohms and a voltage drop of 30 volts.

Therefore, the voltage drop across R1 is V1 = V - V2 - V3V = voltage supplied to the circuit = voltage drop across R1 + voltage drop across R2 + voltage drop across R3R1 = Resistance of resistor R1.R2 = Resistance of resistor R2 = 200 Ω.V3 = Voltage drop across resistor R3.I3 = Current through resistor R3.To calculate the current in resistor R3, let's follow the steps given below.Step 1: Find the voltage drop across R1.Using Ohm's Law, the voltage drop across R2 is V2 = IR2Substitute the values of V2 and R2 to get the value of current I.I = V2/R2I = 30/200I = 0.15 A

Using Kirchhoff's voltage law, the voltage drop across R1 isV1 = V - V2 - V3V = V1 + V2 + V3Substitute the values of V, V2, and V3 to get the value of V1.V1 = V - V2 - V3V1 = 100 - 30 - V1V1 = 70 VStep 2: Find the current through R3.Using Ohm's Law, the voltage drop across R3 is V3 = I3R3.Substitute the values of V3 and R3 to get the value of current I3.I3 = V3/R3I3 = (V - V1 - V2)/R3I3 = (100 - 70 - 30)/R3I3 = 0.33 A

Therefore, the current through resistor R3 is 0.33 A.

To learn more about circuit visit;

https://brainly.com/question/12608516

#SPJ11

Answer:

The gas law formula that should be used to solve the opportunity is;

Constant temperature, initial P·V = final P·V

Explanation:

From the question we have;

The initial volume of the cylinder, v₁ = 3.0 cc

The initial pressure of the gas in the cylinder, p₁ = 0.8 atm

The initial temperature of the gas in the cylinder, T₁ = Room temperature

The final volume of the cylinder, v₂ = 1.0 cc

The final pressure of the gas in the cylinder = p₂

The final temperature of the gas in the cylinder, T₂ = Room temperature

The gas law formula that should be used to solve the opportunity is Boyle's law which states that at constant pressure the pressure, of a given mass of gas is inversely proportional to the volume of the gas

Mathematically, Boyle's law can be expressed as follows;

P ∝ V

∴ P₁·V₁ = P₂·V₂

Which gives;

Constant temperature, initial P·V = final P·V

The distance from the axis of the force applied is 2.05 m.

The distance from the axis of the force applied is calculated as follows;

The formula for torque;

τ = Fr

where;

Another formula for torque is given as;

τ = Iα

where;

τ = (mr²)α

τ = (25 kg x (0.925 m)²) x (1.84 rad/s²)

τ = 39.36 Nm

The distance is calculated as;

r = τ/F

r = ( 39.36 Nm ) / (19.2 N)

r = 2.05 m

Learn more about torque here: https://brainly.com/question/14839816

#SPJ1

Answer:

The answer is water

Explanation:

it has a netural ph of 7.0

why is the only option milk?

The Ph for milk is about 6.5 to 6.7,  it varies becauses milks gets sour when it rots.

Answer:

the average tangential speed of the biker is approximately 41.89 m/s.

The service disconnecting switch for an installation consisting of a limited load on a single branch circuit should have a rating of not less than 15 ampere.

A service disconnecting switch is a device which disconnects all the conductors of the system from the main source of supply. The limitation of current is due to the high heat produce. As heat in a conductor is a function of current. Like: H = i²Rt

Where I is the current, R is the resistance of the device, and t is the time of current flow. We can see by the formula that heat is directly proportional to the square of the current. More is the current more will be the heat produced.

To know more about resistance, here

https://brainly.com/question/29427458

#SPJ4

Charge q1=1.00 nC is at x1 = 0 and charge q2 = 3.00 nC is at x2 = 2.00 m. At a point 1.00 m away from charge q1, the electric field will be equal to zero.

This can be determined by calculating the electric field at this point, which is given by:E = (1/4πεo) x (q1/x2 - q2/x2), where εo is the electric permittivity of free space and x is the distance from charge q1.
At x = 1.00 m, E = 0.

An electric field is defined as the physical field that surrounds electrically charged particles and exerts force on all other charged particles in the field, which is either attracting or repelling them. It is also refers as the physical field for a system of charged particles.

To know more about charge refer to-

brainly.com/question/3412043#
#SPJ11

The mutual inductance (M) in a two-coil system depends on the number of turns in each coil (N₁ and N₂), the permeability of the medium between the coils (µ), and the geometry of the coils.

Mutual inductance is a measure of the ability of one coil to induce an electromotive force (emf) in the other coil when a current changes in one of them. It depends on several factors.

First, the number of turns in each coil plays a role. The greater the number of turns, the stronger the magnetic field produced by the coil, resulting in a higher mutual inductance.

Second, the permeability of the medium between the coils is important. The permeability determines how easily magnetic flux lines pass through the medium. A higher permeability leads to stronger coupling between the coils and, consequently, higher mutual inductance.

Lastly, the physical arrangement and geometry of the coils affect the mutual inductance. The proximity and alignment of the coils influence the amount of magnetic flux linking them, thereby impacting the mutual inductance.

Learn more about mutual inductance here:

https://brainly.com/question/28585496

#SPJ11

The maximum speed of the photoelectrons emitted from the clean nickel surface is 6.70 × 10⁵ m/s.

Calculate the energy of a photon.E = hc/λwhere, h = Planck’s constant = 6.626 × 10⁻³⁴ Js, c = speed of light = 3 × 10⁸ m/sE = 6.626 × 10⁻³⁴ × 3 × 10⁸/241 × 10⁻⁹E = 8.21 × 10⁻¹⁸ J

Calculate the kinetic energy of the photoelectrons.

K.E. = E – W₀K.E. = 8.21 × 10⁻¹⁸ J – 5.10 × 1.6 × 10⁻¹⁹ J = 7.09 × 10⁻¹⁹ J

K.E. = 1/2 mv² where, m = mass of photoelectron, v = velocity of photoelectron, and K.E. = kinetic energy of photoelectronv = √(2K.E./m) = √[(2 × 7.09 × 10⁻¹⁹ J)/(9.1 × 10⁻³¹ kg)]v = 6.70 × 10⁵ m/s or 0.224c

So, the maximum speed of the photoelectrons emitted from this surface is 6.70 × 10⁵ m/s.

More on photoelectrons: https://brainly.com/question/16048908

#SPJ11

Answer:

velocity term

Explanation:

Answer:velocity term

Explanation: