if you want to construct a liquid mirror of focal length 1.79 m, with what angular velocity do you have to rotate your liquid?

Answer: no exact answer

=

Explanation:

Ok so it is working ok!

When a fragment of bone containing carbon-14 isotopes of the element carbon is discovered during an archaeological dig, and it is estimated to be approximately 23,000 years old, one can calculate the proportion of the carbon-14 isotopes that remains.

For such more question on Proportion  

https://brainly.com/question/1496357

#SPJ8

Answer:

The water acts like a lubricant therefore has a smooth motion over the ice.

Answer:15 cm

Explanation: u had 10cm. them u had another 5cm

660 newtons

830 newtons

no

additional force would be 350 newtons

Answer:

The false statement has to be that neruotransmitters are in the spinal cord.

Explanation:

Neruotransmitters are in no was associated with the spinal cord. That is more related to nerves and muscles. Neurotransmitters are in the Phasma Membrane acording to sciencedirect.com.

Answer:

40

Explanation:

because his increasing speed

Answer: B

Explanation:

Answer:

(Example Person) has to push hard to get the skateboard started, but once it begins moving, it takes much less effort to keep it rolling over the smooth, flat pavement. In fact, if (Example Person) tries to stop the rolling skateboard, it may take as much effort to stop it as it did to start it rolling in the first place.

Explanation:

Hope this helps :)

Answer:

The kinetic energy of a spring is equal to its elastic potential energy.

The elastic potential energy is 12.5N-m or 12.5 Joules.

Explanation:

\( = \frac{1}{2} k {x}^{2} \\ = \frac{1}{2} (400)( {.25)}^{2} \\ = 12.5\)

Answer:

The lightbulbs were exploding after several mins of use

Explanation:

Answer:

the lightbulbs were exploding after several minutes of use

Explanation:

a p e x :))

Answer:

(a) - \(R_{eq.}=8 \ \Omega\)

(b) - \(I_1=3 \ A, \ I_2= 1.8 \ A, \ I_3=1.2 \ A\)

(c) - \(\Delta V_1=6 \ V, \ \Delta V_2= 18\ V, \ \Delta V_3= 18 \ V\)

Conceptual:

Things to know about parallel/series resistors:

A resistor takes electrical energy and converts it to some other form of energy, such as heat. In doing so this can alter a circuit's current and divide voltages.

Electrical current is the flow of charged particles.

To put it simply, voltage is what "pushes" current through a circuit.

\(\boxed{\left\begin{array}{ccc}\text{\underline{Ohm's Law:}}\\\\\Delta V=IR\end{array}\right}\)

How you should tackle these types of problems:

I recommend combining resistors until you have one resistor. This one resistor is what your total resistance is, which I call the equivalent resistor. Then work backwards from the equivalent resistor to find any information you need, utilizing Ohm's law and properties of parallel/series resistors.

Step-by-step:

Refer to the attached image(s).

Answer:

5.

i am not sur

bcoz i am giving thos answer only for points

Answer:

c

Explanation:

every other option is a conductor

The density of the N nucleus can be calculated by dividing its mass by its volume, the binding energy per nucleon E of the lithium isotope Li is \(5.6 MeV/nucleon\), the energy needed to remove a proton from the nucleus of the potassium isotope K is \(289.77 MeV\)

The mass number of N is 14 and its atomic number is 7. The number of neutrons in the N nucleus is given by \(14 - 7 = 7\) neutrons.

The mass of one neutron is about 1.008665 atomic mass units (amu) or \(1.67493 \times 10^{-27} kg\).

The mass of the N nucleus = \(7(1.008665) + 7.016004 = 14.04273 $ amu\). Thus, the density of the N nucleus can be calculated by dividing its mass by its volume.

The binding energy per nucleon E of the lithium isotope Li is 5.6 MeV/nucleon. To find its atomic mass of this isotope, the mass defect of the nucleus is calculated using the formula:

Mass defect = (Zmp + Nmn) - M

where

The mass of a proton is approximately \(1.00728 amu\), while the mass of a neutron is approximately \(1.00866 amu\).

The energy needed to remove a proton from the nucleus of the potassium isotope K can be calculated using the formula:

Binding energy = \(E \times A\)

where E is the binding energy per nucleon, A is the mass number. Binding energy of K isotope = 7.43 MeV/nucleon (given)

Thus, the energy needed to remove a proton from the nucleus of the potassium isotope K is \(289.77 MeV\).

Learn more about The density: brainly.com/question/1354972

#SPJ11

Answer:

b) Quartz Clock

Explanation:

It's is a very type of clock which uses the vibration of quartz crystals to measure time accurately

Answer: 1. .090km/h

2. I dont know

3. 1560

Explanation:

1. add all the numbers up and divide by 3 bc thats how many numbers there are.

2. I dont know

3. add all distances up

Answer: I think ions I’m not 100% sure if it’s not let me know

Explanation:

According to Heisenberg's Uncertainty Principle, it is impossible to determine the position and momentum of a particle with absolute certainty at the same time. The Uncertainty Principle is defined as Δx * Δp ≥ h/4π, where Δx is the uncertainty in position, Δp is the uncertainty in momentum, and h is Planck's constant.
For the given problem, the uncertainty in position of a proton with mass 1.673 x 10-27 kg and kinetic energy 1.2 keV can be calculated as follows:

We know that the momentum p of a particle is given by p = mv, where m is the mass of the particle and v is its velocity.
The kinetic energy of the proton can be converted to momentum using the equation E = p²/2m, where E is the kinetic energy.
1.2 keV = (p²/2m)    (1 eV = 1.6 x 10^-19 J)
p²/2m = 1.92 x 10^-16 J
The momentum p of the proton can be calculated by taking the square root of both sides:
p = √(2mE) = √(2 x 1.673 x 10^-27 x 1.6 x 10^-16) = 7.84 x 10^-22 kg m/s

Using Heisenberg's Uncertainty Principle, we can calculate the uncertainty in position as follows:
Δx * Δp ≥ h/4π
Δx ≥ h/4πΔp
Substituting the values of h, Δp, and solving for Δx:
Δx ≥ (6.626 x 10^-34)/(4π x 7.84 x 10^-22)
Δx ≥ 2.69 x 10^-12 m

Therefore, the uncertainty in position of the proton is 2.69 x 10^-12 m.

To know more about momentum visit:-

https://brainly.com/question/30677308

#SPJ11

The energy lost to other forms like sound and heat, is mv². If the velocity of the blocks after collision is zero.

Mass of both the block, m₁ = m₂ = m

Velocity of both the block, v₁ = v₂ = v

Velocity after collision = 0

Combined mass after collision, = m+m = 2m

Initial energy of 1 block, = 0.5mv²

Initial energy of 2 block, = 0.5mv²

Total energy before collision = 0.5mv² + 0.5mv² = mv²

Energy after collision, = (2m)×0² = 0

So energy lost, = mv² - 0 = mv²

This energy converts into thermal energy, and sound energy.

To know more about thermal energy, here

https://brainly.com/question/3022807

#SPJ4

Answer:

because pressure is inversly proportional to the area of the object, i.e if area decreases pressure increases and vice-versa and area is less in sharp knife than in blunt knife hence sharp knives create great pressure than blunt knife.

Answer: 4K1

Explanation:

The ball travelled approximately 18.7 meters.

We can use the following kinematic equation to calculate the distance the ball travelled:

v² = u² + 2as

Where

Substituting the given values, we get:

15² = 1² + 2(6)s

225 = 1 + 12s

224 = 12s

s = 224/12

s ≈ 18.7

Therefore, the ball travelled approximately 18.7 meters.

Learn more about kinematic equation here : brainly.com/question/28788270

#SPJ1

The weight of the satellite at a distance of one Earth radius above the surface of Earth is 40 N.

The given parameters:

The gravitational force on the satellite is calculated by applying Newton's law of universal gravitation is calculated as;

\(F = \frac{Gm_1m_2}{R^2} \\\\F_1 R_1^2 = F_2R_2^2\\\\F_2 = \frac{F_1 R_1^2 }{R_2^2} \\\\F_2 =\frac{200 \times R_1^2}{(2R_1)^2} \\\\F_2 = \frac{200 \times R_1^2 }{4R_1} \\\\F_2 = 40 \ N\)

Thus, the weight of the satellite at a distance of one Earth radius above the surface of Earth is 40 N.

Learn more about Newton's law of universal gravitation here: https://brainly.com/question/9373839

Hello!

We can use Ohm's Law to solve for the potential difference across a resistor given the current and resistance:

\(V = iR\)

V = Potential Difference (? V)
i = Current (1.5 A)

R = Resistance (12 Ω)

Plug in the known values and solve.

\(V = (1.5)(12) = \boxed{18 V}\)

Answer:

A. Pu -239

Explanation:

An isotope is an element with the same atomic number but different mass number. most isotope are unstable, having short half life.

Curium-242 is an isotope produced when Plutonium 239 is bombarded by an alpha particle. This reaction between Plutonium 239 and alpha particle gives curium-242, neutron and a high amount of energy as the products.

Curium oxidizes easily, and it is a dangerous metal which can cause cancer initiation when absorbed by biological materials e.g bones or tissue.