please help i’m so lost✋:
Place the following events describing the production of electrical energy from a nuclear fission reactor in the correct order. Write the numbers 1 (first) through 7 (fast) in the spaces provided.

Answer:

2.47 m/s

Explanation:

Momentum = Mass X Velocity

If they were locked together, it means its a perfectly inelastic collision. Therefore,

Total momentum before = Total momentum after

Total momentum before = (20 X 20) - (18 X 17)

= 94

Total momentum after = 94

Y = Object speed after collision

94 = (20+18)Y

Y = 2.47368421 m/s

Since the rod is held perpendicular to the direction of motion of the spaceship, the rod is 1.00 m long to an Earth observer.

To answer the question, we use the principle of length contraction in relativity.

The principle of length contraction states that the length of an object would only contraction when it is in the direction of motion.

So, since the 1.00 m long rod is in the spaceship is held perpendicular to the direction of motion of the spaceship, there is no length contraction and thus, an observer on the Earth measures the same length of 1.00 m.

So, Since the rod is held perpendicular to the direction of motion of the spaceship, the rod is 1.00 m long to an Earth observer.

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Answer:

900 N

Explanation:

F = ma

  = 300 (3) = 900 N

Answer:

it way the most on jupiter and the least on mars

Explanation:

Answer:

0.66 s

Explanation:

∆x = v∆t → 2 × 115 = 350 ∆t → ∆t = 230/350 = 0.66 s

Answer:

Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors. Conditions like these are found deep within the Earth or where tectonic plates meet.

Based on the fact that the student is moved twice as far from the center of the earth, her new weight will be 112.5 N.

When the student was moved by the same distance from the center of the earth, her weight was halved.

When she was then moved twice as far, her weight was halved again.

This means that her new weight is:

= 450 x 1/2 x 1/2

= 450 x 1/4

= 112.5 N.

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Answer:

The first vehicles fitted with an alternator was vehicles during WWll.

Chrysler Corporation fitted an alternator on the Valiant 1960 as standard equipment

Explanation:

Answer:

The first car fitted with an alternator, rather than a direct current dynamo was the 1960 Plymouth Valiant.

Answer:

Q = M kg* 3.33E5 J / kg = .234 * 3.33E5 = 7.79E4 Joules

As a check (using 80 cal/gm as latent heat of fusion for water)

234 g * 80 cal/gm = 18720 cal

1 cal = 4.19 J

18720 cal * 4.19 J / cal = 7.7E4 J       agrees with value found above

the power developed when, 20 joules of work are done in 4.0 second.

power= workdone/ time

here workdone= 20 joules

time taken= 4.0s

so putting these values in the above formula, we get:

power= 20/4.0

=5.0 watts

answer= option b) 5.0 watts

[tex]\bold\blue{Formula : }[/tex]

[tex]\bold{Power = \frac{energy}{time} }[/tex]

[tex]\bold\blue{Given : }[/tex]

[tex]\bold\blue{ Solution : }[/tex]

[tex]\bold{Power = \frac{energy}{time} }[/tex]

[tex]\bold{Power = \frac{20}{4.0} }[/tex]

[tex] \bold{ Power = 5.0}[/tex]

So , B.) 5.0 watts is answer .

No, Saman didn't travel at constant speed

v₁ = 90/35 = 2.57 m/s

v₂ = 0

v₃ = 90/75 = 1.2 m/s

Average speed = total distance/time

Average speed = (90+90)/(35+70+75) = 1 m/s

Answer:

the answer is 374.15 kelvins

Answer:

b that is density at object moves

A material that doesn't conduct electricity well - such as a plastic/rubber covering, acting as the electrical insulator.

Hope this helps!

The volume of one rubber ball and the cost of producing one ball and the profit will it make on each ball will be 20.58 cm³, $0.09261, and $0.40739 respectively.

It is concerned with the geometry, region, and density of various 2D and 3D shapes.

The given data in the problem is;

r is the Rubber balls = 1.7 cm

V is the volume

C is the cost of production

P is the profit

The volume of the rubber ball is  found as;

[tex]\rm v= \frac{4}{3} \pi r^3 \\\\ \rm v= \frac{4}{3} \times 3.14 (4.913)^3 \\\\ \rm v= 20.58 cm^3[/tex]

If the price of the rubber required to make a ball is $0.0045/cm3, the ball's production cost will be $0.0045/cm3.

The cost of a ball is the multiplication of the cost of one ball and the selling price of the ball;

C = 0.0045 x 20.58

C = $0.09261

P is the profit gained and profit is the subtraction of the selling price and cost price.

P = S.P.-C.P.

P=0.5 - 0.09261

P = $0.40739

Hence the volume of one rubber ball and the cost of producing one ball and the profit will it make on each ball will be 20.58 cm³, $0.09261, and $0.40739 respectively.

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Answer:  

1: C

2: C

3: A

Explanation: just did it

Answer:

The three reasons for this is because of high enrgy density, self-discharge, and small amount of energy.

Explanation:

These are why that happens.

Hope this helps!

-Justin

Answer:

donates (loses) electrons

Explanation:

Atoms are most stable when they have zero valence electrons (full octets) and have the same electron configuration as the Noble Gases.

Atoms that have 1-3 valence electrons are most likely to donate them to reach this stable configuration.

An example is Sodium (Na) has 1 valence electron, as it is group one of the periodic table, and it often forms as a positive cation (Na+1) by donating its valence electron.

The x and y coordinates of the particle at this moment is (6x + 4.5y) m.

The position of the particle at any instant is determined from the velocity and acceleration of the particle as shown below.

v² = u² + 2as

where;

v² = 0 + 2as

v² = 2as

s = v²/2a

[tex]s_x = \frac{v^2}{2a_x} = \frac{6^2}{2(3)} = 6\ m\\\\s_y = \frac{v^2}{2a_y} = \frac{6^2}{2(4)} = 4.5 \ m\\\\s = (6 x \ + 4.5y)m[/tex]

Thus, the x and y coordinates of the particle at this moment is (6x + 4.5y) m.

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Answer:

temperature is essentially the speed of the molecules.

Explanation:

temperature is the kinetic energy of molecules, and kinetic energy is dependent on velocity.

[tex]\qquad\qquad\huge\underline{{\sf Answer}}♨[/tex]

Amplitude and frequency are two properties of sound waves that decreases as distance from source decrease.

Therefore, as the ambulance moves away,

So, correct choice is D

Answer:m1v1 + m2v2 = (m1f + m2f)vf. 3000kg(10.0m/s) + (15000kg)(0.0m/s) = (18000kg)(vf).

Explanation:

Answer:

Sponges

Explanation:

It would be either sponges or flatworms.

I apologize if it is incorrect-
I hope it helps! Have a great day!

Anygays-

Answer:

[tex]50\; {\rm m\cdot s^{-1}}[/tex], assuming that the force on the golf ball was constant.

Explanation:

Assume that the force the golf club exerted on the golf ball a constant force of magnitude [tex]F[/tex]. Let [tex]\Delta t[/tex] denote the duration the club was in contact with the golf ball. The impulse of this force would be:

[tex]J = F\, \Delta t[/tex].

Let [tex]\Delta p[/tex] denote the change in the momentum of this golf ball. By the impulse-momentum theorem, this [tex]\Delta p\![/tex] would be equal to the impulse on the golf ball.

[tex]\Delta p = J = F\, \Delta t[/tex].

The momentum [tex]p[/tex] of this golf ball is the scalar product between the mass [tex]m[/tex] of this golf ball and the velocity [tex]v[/tex] of this golf ball. The mass of this golf ball stays the same. Thus, when the momentum of this golf ball changes by [tex]\Delta p[/tex], the velocity of this golf ball would change by [tex](\Delta p) / (m)[/tex].

The change in the velocity of this golf ball would thus be:

[tex]\begin{aligned}\Delta v &= \frac{\Delta p}{m} & \genfrac{}{}{0em}{}{(\text{change in momentum})}{}\\ &= \frac{J}{m} & \genfrac{}{}{0em}{}{(\text{impulse on the golf ball})}{}\\ &= \frac{F\, \Delta t}{m} \\ &= \frac{500\; {\rm N} \times 0.01\; {\rm s}}{0.1\; {\rm kg}} \\ &\approx 50\; {\rm m\cdot s^{-1}}\end{aligned}[/tex].

(Note that [tex]1\; {\rm N} = 1\; {\rm kg \cdot m^{2}\cdot s^{-2}}[/tex].)

Answer:

B

Explanation:

Formula

Mechanical advantage = length of the ramp / height

Givens

Length of the ramp = 8

Mechanical advantage = 2

height = ?

Solution

2 = 8feet / height                                  Multiply both sides by height

2* height = 8 feet * height / height      Combine

2* height  = 8 feet                                 Divide by 2

2*height/2 = 8 feet/2                              

height = 4 feet.

Answer:

One of the indirect proofs that orbits change is actually in the growth of our own teeth when we were children. our teeth are some of the most basic, and primitive

parts of our bodies. They grow on a 9 day cycle, which was an ancient full moon to full moon cycle when the Earth and the Moon were a lot smaller, and closer together, and the co-orbital period was only 9 days, not the 29.5 days that it is currently.

So Given any two " Planets " that co-orbit a common gravitational center, the larger planet will grow larger far faster than the smaller planet, and the larger planet will accelerate the smaller planet to a higher orbit with a longer period, and decelerate itself to a lower orbit with a longer period, and the absolute value of the center to center distance will increase, and the orbital period will increase. The two orbs and their common gravitational center will remain co-linear through out the gradual growing and changing process.

This is an important process for the enlargement of the solar system as time passes, and an important process for larger galaxies as they attract and merge with smaller galaxies.

All of the planets grow larger at an accelerating rate, and thus systems spiral outward concentrating mass into larger and fewer galaxies, solar systems, and planet - moon systems.

Answer:

The magnitude of the average force to supply to the ball in order to stop the ball is 9.68 N.

Explanation:

Let's think Newton's 2nd Law: F = ma.

We are given the mass of the ball: 219 g ⇒ .219 kg.

We are given the initial velocity, time, and final velocity of the ball ∴ we can solve for acceleration.

We are trying to find the force needed to stop the ball.

Let's find the acceleration of the ball first.

Now, we can plug these known values into this kinematic equation and solve for acceleration, a.

Substitute acceleration and mass into F = ma and solve for the force.

The magnitude of the average force to supply to the ball in order to stop the ball is 9.68 N.

The angular velcoity of this cylinder when the downward speed of the elevator is 1.2 m/s would be 6 rad/s.

Given the following data:

Radius of cylinder = 0.20 meter.

Linear velocity = 1.2 m/s.

Angular velocity can be defined as the rate of change of angular displacement of an object with respect to time. Thus, it is a measure of how fast and quickly an object revolves or rotates relative to another point or how its angular position changes with respect to time.

Mathematically, angular velcoity is given by this formula:

[tex]V =r\omega\\\\\omega =\frac{V}{r}[/tex]

Substituting the given parameters into the formula, we have;

[tex]\omega = \frac{1.2}{0.2}[/tex]

Angular velocity = 6 rad/s.

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The principle of cause and effect is applied in every life as is seen in damage caused to cells by exposure to large amounts of ultravoilet rays.

Cause and effect refers to the principle in which for every effect received or observed, an underlying cause is present.

Based on cause and effect;

Cells can repair small amounts of damage caused when a person is exposed to large amounts of gamma rays.

If a certain amount of exposure time in the sun is dangerous for adults, would result in a similar damage to a child.

A lot of sun exposure over time will cause an individual to develop a high risk of cell damage just as a shorter exposure time to X-rays gives the same risk.

Ultraviolet light can damage a cell especially with over 5 minutes of exposure to UVB light.

New vaccine studies are sometimes tested on pigs because humans have an immune system very similar to pigs.

Therefore, cause and effect is applied in every activities.

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