Anyone can help me with this

Answer:

Multiply the time by the acceleration due to gravity to find the velocity when the object hits the ground. If it takes 9.9 seconds for the object to hit the ground, its velocity is (1.01 s)*(9.8 m/s^2), or 9.9 m/s.

Explanation:

Answer:it's 92 my friend

Explanation:

have a great day

Answer:

92

Explanation:

0.4 · 230 = 92

Answer:

the molecules form new chemical bonds

Explanation:

The circumstance which will not occur when water undergoes a physical change is that the molecules form new chemical bonds. Thus, the correct option for this question is B.

Physical change may be defined as a type of change within the compound or things that significantly do not change the chemical properties of the matter. It usually involves the process of transition from one state to another.

When water undergoes a physical change means liquid to solid, solid to liquid, or gas, the motion of the molecules, kinetic energy, and density alter with respect to the state of matter. So, all these attributes are classified into the category of physical change.

Therefore, the molecules forming new chemical bonds is the option that will not occur at any point in time when water undergoes a physical change. Thus, the correct option for this question is B.

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Answer:

organic material

Explanation:

Answer:2.5 meters per second

Explanation:

10/4=2.5

Answer:

Haha

Explanation:

Explanation:

The force would be net positive.

Answer:

answer below

Explanation:

2: net force

3: balanced force

4: unbalnced force

i hope this is right

Answer:

b. A steel paper clip near a magnet

Explanation:

A steel paper clip near a magnet is an object that most likely has magnetic domains because of its inner composition.

A magnetic domain is a part or region within a magnetic substance in which the magnetization is present in a uniform direction.

So we can conclude that a steel paper clip near a magnet is an object that most likely has magnetic domains because of its inner composition.

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Answer:

An image can be seen in the mirror because the light reflected from an object falls on the mirror and it is reflected.

Răspuns:

1,054 × 10 ^ -6Combombs

Explicaţie:

Conform legii coloumbs, forța de atracție sau repulsie între sarcină este exprimată ca;

F = kq1q1 / r²

F este forța atracției

q1 și q2 sunt taxele

r este distanța dintre sarcini

Deoarece taxele sunt egale, q1 = q2 = q

Ecuația devine

F = kq² / r²

Dat

F = 0,1N

r = 10cm = 0,1m

Necesar

q

Înlocuiți parametrii dați în formulă;

0,1 = 9 × 10 ^ 9q² / 0,1

0,1 × 0,1 = 9 × 10 ^ 9q²

0,01 = 9 × 10 ^ 9q²

q² = 0,01 / 9 × 10 ^ 9

q² = 0,01 / 9.000.000.000

q² = 1,11 × 10 ^ -12

q = √1.11 × 10 ^ -12

q = 1,054 × 10 ^ -6Combombs

Prin urmare, sarcina electrică pe una dintre sfere este de 1,054 × 10 ^ -6Combombs

Answer:

C) 350 m/s N

Explanation:

Velocity is measured in miles per hour or metres per second.

Answer:

i vigilate

Explanation:

Answer:

Clouds are made up of tiny water droplets. ... As more and more droplets join together they become too heavy and fall from the cloud as rain. Warm air can hold more moisture than cool air. When the warmer air is cooled and the moisture condenses, it often rains more heavily.

Explanation:

hope it helps

sorry Idk the answer ..???

Answer:

(a) s(t) = 4.9t²

(b) s(1) = 4.9 m

(c) s(2) = 19.6 m

Explanation:

(a)

the position time equation can be formed by using 2nd equation of motion:

s = Vi t + (1/2)gt²

where,

s = position

Vi = Initial velocity = 0 m/s

t = time

g = 9.8 m/s²

Therefore,

s = (0 m/s)t + (1/2)(9.8)t²

s(t) = 4.9t²

(b)

s(1) = 4.9(1)²

s(1) = 4.9 m

(c)

s(2) = 4.9(2)²

s(2) = 19.6 m

We want to get the motion equations of a ball, and we want to use them to find the position of the ball at different times.

The solutions are:

We know that the ball starts from rest (so the initial velocity is zero) from the position x = 0.

The ball has a constant acceleration of 2.4 m/s^2

Then the acceleration equation is:

A(t) = 2.4 m/s^2

To get the velocity equation we integrate, remember, the initial velocity is zero, so we don't have a constant of integration:

V(t) = (2.4 m/s^2)*t

To get the position equation we integrate again, and because the initial position is x = 0, we don't have a constant of integration:

P(t) = 0.5*(2.4 m/s^2)*t^2

a) The position equation is:

P(t) = (1.2 m/s^2)*t^2

b) The position of the ball at t = 1s is given by:

P(1s) =  (1.2 m/s^2)*(1s)^2 = 1.2m

The ball position at t = 1s is x = 1.2m

c) Similar to the above case:

P(2s) = (1.2 m/s^2)*(2s)^2 = 4.8 m

x = 4.8m

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Answer:

Height h = 37.8 m

Explanation:

Given :

Velocity of car (v) = 98 km / h

Acceleration of gravity = 9.8 m/s²

Computation:

Acceleration of gravity = 9.8 m/s²

Acceleration of gravity = (98)(1,000 m / 3,600 s)

Acceleration of gravity = 27.22 m/s

By using law of conservation of energy ;

(1/2)mv² = mgh

h = v² / 2g

h = 27.22² / 2(9.8)

Height h = 37.8 m

The height from which the car would have to be  dropped to have the same kinetic energy is 37.81 meters.

Given the following data:

To find the height from which the car would have to be  dropped to have the same kinetic energy:

First of all, we would convert the value of velocity in km/h to m/s.

Conversion:

[tex]98 = \frac{98}{3600} \times 1000 = 27.22 \;m/s[/tex]

Applying the law of conservation of energy:

[tex]P.E = K.E\\\\mgh = \frac{1}{2} mv^2\\\\gh = \frac{1}{2}v^2\\\\h= \frac{v^2}{2g}[/tex]

Substituting the given parameters into the formula, we have;

[tex]h = \frac{27.22^2}{2\times 9.8} \\\\h=\frac{741.05}{19.6}[/tex]

Height, h = 37.81 meters

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Answer:

s = t⁴/108+6t+24

v = t³/27 + 6

Explanation:

Given the equation of acceleration expressed as a = kt²

t is in seconds

To get the velocity, we will integrate the acceleration function

a = kt²

Integrate both sides

a = kt²

v = ∫kt² dt

v = k ∫t² dt

v = kt³/3 + C1..... *

s = ∫kt³/3 dt+ ∫C1 dt

s = kt⁴/12+C1t + C2

At t = 0, S= 24

24 = k(0)⁴/12 + C1(0)+ C2

24 = C2

s = kt⁴/12+C1t + 24

If at t = 6 seconds, s = 96m

Substitute;

96 = k6⁴/12+6C1+ 24 .... **

Also at t = 6, v = 18m/s

Substitute into *

v = kt³/3 + C1..

18 = k6³/3 + C1..... ***

Solve ** and *** simultaneously and get k and C1

96 = k6⁴/12+6C1+ 24

k6⁴/12+6C1+ = 72 × 1

k6³/3 + C1 = 18 × 6

---------------------------

k6⁴/12+6C1+ = 72

k6⁴/3 + 6C1 = 108

Subtract

[(6⁴k)-4(6⁴k)]/12 = 72-108

-3(6⁴k)/12 = -36

6⁴k/12 = 12

6⁴k = 144

k = 144/1296

k = 1/9

Substitute k = 1/6 into k6³/3 + C1 = 18 and get C1

1/6(216/3) + C1 = 18

12+ C1= 18

C1 = 18-12

C1 = 6

Write s in terms of t;

s = kt⁴/12+C1t + 24

s = 1/9t⁴/12+6t+24

s = t⁴/108 + 6t + 24

Write v in terms of t;

v = kt³/3 + C1

v = 1/9(t³/3)+6

v = t³/27 + 6

Answer:

3552.6N

Explanation:

F=mg

=3.72*955

=3552.6N

Answer:

3552.6N

Explanation:

Answer:

Explanation:

Given the magnitude of the forces, 7N and 2N, the minimum combining force acting on the forces are when the force's is acting in opposite direction.

Magnitude of the force in opposite direction is 7N - 5N = 2N

The maximum combining force occurs when they act in the same direction. Magnitude of the force in the same direction is 5N+7N = 12N

Hence the range of magnitude requires is 2N≤F≤12N

Answer:

The average acceleration of the cyclist is 5 m/s²

Explanation:

Given;

initial velocity of the cyclist, u = 10 m/s

final velocity of the cyclist, v = 20 m/s

initial time of the cyclist, t₁ = 4 seconds

final time of the cyclist, t₂ = 6 seconds

The average acceleration is given by;

[tex]a = \frac{dv}{dt}\\\\a = \frac{v-u}{t_2-t_1}\\\\a = \frac{20-10}{6-4}\\\\a = 5 \ m/s^2[/tex]

Therefore, the average acceleration of the cyclist is 5 m/s²

Answer:

The percentage of the cube that floats = 80%

The percentage of the cube that sinks =20%

Explanation:

Given that the density of the cube material, [tex]\rho= 0.2 kg/l[/tex]

Length of the sides of the cube, [tex]a= 9 cm[/tex]

So, the volume of the cube, [tex]v=a^3=(9cm)^3=729 cm^3[/tex]

As [tex]1000cm^3= 1 l,[/tex]

so the volume of the cube [tex]v= 729/1000 l = 0.729 l.[/tex]

Hence, the mass of the cube, [tex]m=\fho v = 0.2 \times 0.729 = 0.1458 kg[/tex].

The gravitational force acting on the cube in the downward direction,

[tex]F_c= mg[/tex] [g is the acceleration due to gravity]

[tex]\Rightarrow F_g=0.1458g[/tex] Newtons ...(i)

At equilibrium condition, let x cm of the cube sinks in the water.

So, the volume of the water replaces,

[tex]v_w=9\times 9\times x = 81x cm^3.[/tex]

Or, [tex]v_w= 81 x/ 1000 l = 0.081x l[/tex]

The density of the water, [tex]\rho_w= 1 kg/l[/tex]

So, the mass of water replaced,

[tex]m_w= \rho_w v_w = 1\times 0.081x= 0.081x kg.[/tex]

Now, the buoyancy force acting on the cube in the upward direction,

[tex]F_b = m_w \times g[/tex] [ g is the acceleration due to gravity]

[tex]\Rightarrow F_b= 0.081x\times g[/tex] Newtons ...(ii)

At equilibrium condition, the gravitational force acting on the cube in the downward direction is equal to the buoyancy force acting on the cube in the upward direction, so by from equations (i) and (ii), we have,

[tex]F_g= F_b\\\\\Rightarrow 0.1458g = 0.081x\times g \\\\\Rightarrow 0.081x=0.1458 \\\\\Rightarrow x= 0.1458/0.081 = 1.8 cm[/tex].

So, the part of the cube that sinks = 1.8 cm

As the remaining portion of the cube is floating, so the part of the cube that floats [tex]= 9-1.8= 7.2 cm[/tex].

The percentage of the cube that floats

= [tex]\frac {7.2}{9}\times 100 = 80\%[/tex]

The percentage of the cube that sinks

[tex]= \frac {1.8}{9}\times 100 = 20\%[/tex]

Please note that none of the given options are correct.

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 = 1000 × 2

We have the final answer as

Hope this helps you

when a glacier came through the Bronx approximately 240,000 years ago it blocked part of the original path of the Bronx river and subsequently reshaped and modified the path of the river over the past 200 years the rivers course has been altered dramatically by human impact and industry.

have a great day ☺

Answer:

Kinetic energy=1/2mvsquare

1/2 x 1400 x 25 x25

Therefore kinetic energy= 437500Joules

Explanation:

Answer:

437,500 Joules

Explanation:

KE= 1/2 × M

x V^2, where

M = Mass,

V = Velocity

KE = 1/2 × 1400 × 25^ 2

KE= 1/2 × 1400 × 625

KE = 437,500 Joules.

Answer:

GAIA is composed of three main parts; the astrometry instrument, the photometric instrument, and the radial-velocity spectrometer. The astrometry instrument is used to determine the angular positions of stars to better measure their distances and motions. The photometric instrument measures the luminosity of stars to help determine stellar properties such as temperature, mass, age, and what elements the stars are made up of. The radial-velocity spectrometer will determine the speed of galactic objects along the line of sight.

Explanation:

The three main parts that make up GAIA are :

The functions of the main parts of GAIA are as follows

Hence we can conclude that the three main parts that make up GAIA are astrometry , photometric instrument and radial-velocity spectrometer

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