do you think you know this???

Answer:

This question appear incomplete

Explanation:

This question appear incomplete because of the absence of options but when you slam on the brakes when riding a bike or other vehicles, the bike undergoes deceleration. Deceleration is a type of acceleration with a negative value which usually points in the opposite direction of the velocity. As described in the question, deceleration is usually brought about by a decrease in magnitude of a velocity.

Answer:

Radioactivity means: the emission of ionizing radiation or particles caused by the spontaneous disintegration of atomic nuclei.

Explanation: I hope this helps! :)

Answer:

sending out harmful radiation caused when the nuclei (=central parts) of atoms are broken up.

Answer:

The acceleration is negative and very close to zero.

Very Small, because it slowly comes to a stop, which means there is nothing to stop it any faster

It would keep traveling in that direction without slowing down

Explanation:

Answer:

A,B,C

Explanation:

A) because the ball is slowing down that means that the acceleration is changing and is slowing. It also means that it has negative acceleration because it is going the opposite way of velocity. When it stops then there is no more acceleration

B) Net force is calculated by the sum of the forces that are acting on the object. If the net force is unbalanced then it will speed up, slow down, or change direction. So basically, net force is an unopposed force that causes a change in motion. First, it has a net force because it's moving and is not in equilibrium. Second, the net force would be changing as it is stopping. When it stops then it would be in static equilibrium. Basically, the net force is changing as the speed slows down until it comes to a state of equilibrium.

C) If it was in space then it would never stop. Because of the law of inertia, an object in motion will stay in motion as long as there are no other opposing forces. Because there really aren't opposing forces in space, it would keep on going forever.

Answer:

A. Neon and argon

General Formulas and Concepts:

Explanation:

Elements that have a full valence shell (the outermost shell), are in Group 18 of the Periodic Table.

Because their outermost shell is full, they are inert, meaning that they do not like to bond or react with other elements.

Therefore, these gases with a stable full valence shell are known as Noble Gases.

A. would be the correct answer.

Answer:argon and krypton

Explanation:

Noble gases

Answer:

The time taken for the paint ball to hit the ground is [tex]t = 2.143 \ s[/tex]

The distance of the landing point from the tower is [tex]d = 192.86 \ m[/tex]

Explanation:

From the question we are told that

   The height of the tower is [tex]h = 45 \ m[/tex]

    The speed of the paintball in the horizontal direction is  [tex]v_x = 90 \ m/s[/tex]

Generally from kinematic equation we have that

      [tex]h = ut + \frac{1}{2} at^2[/tex]

Here u is the initial  velocity of the paintball in the vertical direction and the value is 0 m/s , this because the ball was fired horizontally

         a is equivalent to [tex]g = 9.8\ m/s^2[/tex]

        t is the time taken for the paintball to hit the ground

   So    

       [tex]45 = 0* t + \frac{1}{2} 9.8 * t^2[/tex]

=>    [tex]t = 2.143 \ s[/tex]

Generally the distance of its landing position from the tower is

         [tex]d = v * t[/tex]

=>      [tex]d = 90 * 2.143[/tex]

=>    [tex]d = 192.86 \ m[/tex]

Answer:

D...............................

Answer:

The inner planets (in order of distance from the sun, closest to furthest) are Mercury, Venus, Earth and Mars. After an asteroid belt comes the outer planets, Jupiter, Saturn, Uranus and Neptune

Explanation:

Answer:

The inner planets (in order of distance from the sun, closest to furthest) are Mercury, Venus, Earth and Mars. After an asteroid belt comes the outer planets, Jupiter, Saturn, Uranus and Neptune

Explanation:

Answer:

20000

Explanation:

f=m*a

mass=5000

a=4

5000*4=20000

Complete Question

While john is traveling along a straight in interstate highway, he notices that the mile marker reads 242 km. John travels until he reaches the 147 km marker and then retraces his path to the 161 km marker. What is John's resultant displacement from the 242 km marker? How far has he traveled answer in units of km

Answer:

The resultant displacement [tex]\Delta x _{1 , 3} = 81 \ km[/tex]

The total distance traveled by john is  [tex]x_t =109 \ km[/tex]

Explanation:

From the question we are told that

      The first position of john from the finish point   is [tex]x_1 = 242 \ km[/tex]

       The second position of john from the finish point is   [tex]x_2 = 147 \ km[/tex]

        The third position of john from the finish point is [tex]x_3 = 161 \ km[/tex]

Generally the displacement from the 242 km  marker is mathematically represented as

          [tex]\Delta x _{1 , 3} = x_1 - x_3[/tex]

Here we used [tex]x_3[/tex] instead of  [tex]x_2[/tex] because [tex]x_3[/tex] is further than [tex]x_2[/tex] from the finish point

=>       [tex]\Delta x _{1 , 3} = 81 \ km[/tex]

Generally the total distance traveled by John is  mathematically evaluated as

         [tex]x_t = [x_1 - x_2 ] + [x_3 - x_2][/tex]

=>       [tex]x_t = [242 - 147 ] + [161 - 147][/tex]

=>       [tex]x_t =109 \ km[/tex]

Answer:

11250 seconds or 187.5 mins

Explanation:

The formula to be used here is that of speed.

Speed (in m/s) = distance (meter) ÷ time (secs)

The speed provided is 32 meters per second

The distance provided will have to be converted to meters; 360 km = 360 × 1000 = 360000 meters

Thus,

32 = 360000 ÷ time

time = 360000 ÷ 32

time = 11250 seconds or 187.5 mins

It will take Naomi 11250 seconds to get to New York

Answer:

DA ≅ DC (since BD is equidistant to A and C)

Explanation:

A line bisector is one that divides a given line into two equal parts. And which is equidistant from the ends of the bisected line.

Given: BD is the perpendicular bisector of CA.

Thus:

BD is equidistant to A and C

Also, BD is a common side to ΔBDA and ΔBDC

DA ≅ DC (since BD is equidistant to A and C)

<BDA ≅ <BDC (congruent property)

<ADB ≅ <DBC (alternate angle property)

<CDB ≅ <ABD (alternate angle property)

Thus,

ΔBDA ≅ ΔBDC (Side-Angle-Side, SAS, congruent property)

I don't understand the question

Answer:

As the ball falls from C to E, potential energy is converted to kinetic energy. The velocity of the ball increases as it falls, which means that the ball attains its greatest velocity, and thus its greatest kinetic energy, at E. 19.

Explanation:

Answer:

The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another.

Explanation:

Hope this helped, Have a Great Day!!

The answer is C, 50J

Please mark brainliest Have a nice day :)

Answer:

d) 2Fr

Explanation:

We know that the work done in moving the charge from the right side to the left side in the k shell is W = ∫Fdr from r = +r to -r. F = force of attraction between nucleus and electron on k shell. F = qq'/4πε₀r² where q =charge on electron in k shell  -e and q' = charge on nucleus = +e. So, F = -e × +e/4πε₀r² = -e²/4πε₀r².

We now evaluate the integral from r = +r to -r

W = ∫Fdr

= ∫(-e²/4πε₀r²)dr

= -∫e²dr/4πε₀r²

= -e²/4πε₀∫dr/r²

= -e²/4πε₀ × -[1/r] from r = +r to -r

W = e²/4πε₀[1/-r - 1/+r] = e²/4πε₀[-2/r} = -2e²/4πε₀r.

Since F = -e²/4πε₀r², Fr = = -e²/4πε₀r² × r = = -e²/4πε₀r and 2Fr = -2e²/4πε₀r.

So W = -2e²/4πε₀r = 2Fr.

So, the amount of work done to bring an electron (q = −e) from right side of hydrogen nucleus to left side in the k shell is W = 2Fr

Answer:

because the gravitational pull is maximum at the poles and decreases as it comes down toward the equator.

Answer:

Two atoms from column 1. Each would give 1 electron to the Oxygen. Oxygen will be 2- and each group 1 ion will be 1+

Explanation:

Sorry if Im wrong

Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 3000 × 2

We have the final answer as

Hope this helps you

Answer:

m = 5 [mg]

Explanation:

We must remember that the definition of linear momemtum is defined as the product of mass by distance.

P = m*v

P = momentum = 40 [mg*m/s]

m = mass [mg]

v = velocity = 8 [m/s]

Now clearing m:

m = P/v

m = 40/8

m = 5 [mg]

Answer:

We might know that the greater the acceleration of, say, a car moving away from a stop sign, the greater the displacement in a given time. But we have not developed a specific equation that relates acceleration and displacement. In this section, we develop some convenient equations for kinematic relationships, starting from the definitions of displacement, velocity, and acceleration already covered.

Explanation:

Answer:9 meters?

Explanation:

Answer:

waning crescent

Explanation:

Waxing Crescent - Rises before noon, transits meridian before sunset, sets before midnight

Answer:

new moon

Explanation:

yea im sure

can i get the brainliest? or not ok T-T im always alone i know and nobody doesnt like me so yes u are right im always alone for forever

and nobody doesnt wanna chat with me ok i got it bcoz thats all my bad im a bad person :(

Answer:

[tex] \boxed{{160 \: m(s)}^{ - 1} }[/tex]

Explanation:

[tex]if \:the \: frequencies \: are \to \\ f_{1} = 640Hz \\ and \\f_{2} = 480Hz \: \\ but \: \boxed{v = f \gamma }: f = \frac{v}{ \gamma } \\ if \: \gamma_{1} - \gamma _{2} = 1 = \gamma \\ f_{1} - f_{2} = 640 - 480 = \boxed{ 160Hz} = f \\ v = f \gamma = 160 \times 1 = \boxed{{160 \: m(s)}^{ - 1} }[/tex]