A 2kg rock is at the edge of a cliff 20m above the surface of a lake. It comes loose and falls. Half way down it is falling at 14 m/s. What is its Kinetic Energy at the half way point?

Please show work!

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

Here's the correct choices for the blank questions~

# 1 : position - time graph

#2 : Displacement - time graph

#3 : Motion graphs

#4 : Ticker tape diagram

#5 : Wave

#6 : Amplitude

#7 : Frequency

The answers to the questions are as follows :

Position time graphs are motion graphs that show the change in an object position in relation to time traveled, while a displacement time graph shows if an object is going backwards or forward and unlike distance, she does not consider the direction of movement of an object.

Motion graphs are used for the presentation of the motion of objects visually.

Hence we can conclude that the answers to your questions are as listed above.

Learn more about Ticker tape diagram : https://brainly.com/question/4583195

#SPJ5

A wool sweater worn under a cotton jacket produces more static charges.

Static charge is an imbalance of electric charges within or on the surface of a material or between materials.

Static charges can be produced by two materials together (friction method).

A wool sweater worn under a cotton jacket (in the absence of lubricant like water) creates friction which enables more static charge to be produced.

Thus, a wool sweater worn under a cotton jacket produces more static charges.

Learn more about static charges here: https://brainly.com/question/830809

Answer:

We are given the trajectory of a projectile:

y=H+xtan(θ)−g2u2x2(1+tan2(θ)),

where H is the initial height, g is the (positive) gravitational constant and u is the initial speed. Since we are looking for the maximum range we set y=0 (i.e. the projectile is on the ground). If we let L=u2/g, then

H+xtan(θ)−12Lx2(1+tan2(θ))=0

Differentiate both sides with respect to θ.

dxdθtan(θ)+xsec2(θ)−[1Lxdxdθ(1+tan2(θ))+12Lx2(2tan(θ)sec2(θ))]=0

Solving for dxdθ yields

dxdθ=xsec2(θ)[xLtan(θ)−1]tan(θ)−xL(1+tan2(θ))

This derivative is 0 when tan(θ)=Lx and hence this corresponds to a critical number θ for the range of the projectile. We should now show that the x value it corresponds to is a maximum, but I'll just assume that's the case. It pretty obvious in the setting of the problem. Finally, we replace tan(θ) with Lx in the second equation from the top and solve for x.

H+L−12Lx2−L2=0.

This leads immediately to x=L2+2LH−−−−−−−−√. The angle θ can now be found easily.

Based on the mass and luminosity of the Sun, the time required to convert of its original hydrogen into helium is 7.505 × 10^10 years.

Nuclear fusion is the process whereby nucleus of lighter atoms are fused together to produce heavier atoms with the release of large amounts of energy.

Nuclear fusion occurs at the core of the sun where four hydrogen atoms are fused to form one helium atom with the release considerable energy, and this is known as hydrogen fusion.

The mass of the Sun = 2.0 × 10^30 kg

The Sun’s hydrogen mass is 0.71 × 2.0 × 10^30 kg = 1.42 × 10^30 kg.

The Sun converts 6 × 10^11 kg of hydrogen into helium per second.

Time required to convert all of the Sun's hydrogen to helium = 1.42 × 10^30 kg/6 × 10^11 kg/s

Time required = 2.367 × 10^18 seconds

Converting to years:

3.154 × 10^7 seconds = 1 year

2.367 × 10^18 seconds = 2.367 × 10^18 seconds * 1 year/3.154 × 10^7 seconds

Time required = 7.505 × 10^8 years

Learn more about nuclear fusion at: https://brainly.com/question/17870368

Answer:

density of liquid x = 2000kg/m3

Explanation:

mass of water = mass of bottle with water - mass of bottle

mass of water = 4g - 2g

mass of water = 2g

mass of liquid x = mass of bottle with liquid x - mass of bottle

mass of liquid x = 6g - 2g

mass of liquid x = 4g

since the mass of liquid x is double the mass of the water and the volume of the bottle is the same, the density is doubled

density of liquid x = 1000kg/m3 • 2

density of liquid x = 2000kg/m3

Answer:

600 J

Explanation:

The formula to find the kinetic energy of an object is [tex]\frac{1}{2}mV^2[/tex]

Now, let's plug in the variables we're given and simplify.

Thus, the answer is 600 Joules.

Answer:

1J

Explanation:

Work done = force × distance

1 × 1 = 1

Work done = 1J

J = Joules

Answer:

384 N

Explanation:

F=m×a

F= ?

m= 32kg

a= 12m/s

32×12 = 384 N

N is newton's

hope this helps

The cross-sectional area of the lead bar is [tex]9.188 \times 10^{-4} \ m^2[/tex].

The Young's modulus (E)of lead bar is given as 1.6 x 10¹⁰ Pa.

The cross-sectional area of the bar is calculated as follows;

[tex]E = \frac{stress}{strain} = \frac{F/A}{e/l} = \frac{Fl}{Ae} \\\\A = \frac{Fl}{Ee}[/tex]

where;

[tex]A = \frac{(mg) l}{Ee} \\\\A = \frac{(10^3 \times 9.8) \times 3}{1.6 \times 10^{10} \times 2 \times 10^{-3}} \\\\A = 9.188 \times 10^{-4} \ m^2[/tex]

Thus, the cross-sectional area of the lead bar is [tex]9.188 \times 10^{-4} \ m^2[/tex].

Learn more about Young's modulus here: https://brainly.com/question/6864866

Answer:

A

Explanation:

Because A looks like it's in the 10,700 degree area and also in the 23 luminosity area.

Explanation:

Explanation:

If an object having initial velocity

uExplanation:

If an object having initial velocity

u

is applied an acceleration of

a

for

t

time, its final velocity

v

is given by

v

=

u

+

a

t

and distance covered

S

is given by

S

=

u

t

+

1

2

a

t

2

.

We have

u

=

o

(as the object starts from rest),

t

=

5

sec., and acceleration

a

=

−

1.5

m

sec

2

.

Hence final velocity

v

=

−

1.5

×

5

=

−

7.5

m

sec

.

Distance covered

S

=

1

2

×

(

−

1.5

)

×

5

2

=

−

18.75

m

.

Minus sign indicates that acceleration is in reverse direction.

is applied an acceleration of

a

for

t

time, its final velocity

v

is given by

v

=

u

+

a

t

and distance covered

S

is given by

S

=

u

t

+

1

2

a

t

2

.

We have

u

=

o

(as the object starts from rest),

t

=

5

sec., and acceleration

a

=

−

1.5

m

sec

2

.

Hence final velocity

v

=

−

1.5

×

5

=

−

7.5

m

sec

.

Distance covered

S

=

1

2

×

(

−

1.5

)

×

If an object having initial velocity

u

is applied an acceleration of

a

for

t

time, its final velocity

v

is given by

v

=

u

+

a

t

and distance covered

S

is given by

S

=

u

t

+

1

2

a

t

2

.

We have

u

=

o

(as the object starts from rest),

t

=

5

sec., and acceleration

a

=

−

1.5

m

sec

2

.

Hence final velocity

v

=

−

1.5

×

5

=

−

7.5

m

sec

.

Distance covered

S

=

1

2

×

(

−

1.5

)

×

5

2

=

−

18.75

m

.

Minus sign indicates that acceleration is in reverse direction

5

2

=

−

18.75

m

.

Minus sign indicates that acceleration is in reverse direction.

Answer: Yes it is possible.

Explanation: The reason is being because, people tend to like to see different stuff. Like in the movie Pocahontas she was a totally different person. And John Smith was a different person too. SO it is possible.

Answer:-2.86*10⁻⁴

Explanation: Use the equation change in volume = (change in pressure * original volume) / Bulks Modulus. ΔV = (-Δp*V₀) / B

Plugging in your numbers, you should get ΔV = (-2.29*10⁷*1) / (8*10¹⁰) = -2.86*10⁻⁴

ΔP = P₂-P₁  ----> ΔP = 2.30*10⁷ - 1.00*10⁵ = 2.29*10⁷

Answer:

germany

Explanation:

Answer:

Yes

Explanation:

You included all the stages of matter and described each of them. You're outlining their properties and you've created a clear diagram (and by diagram I mean chart) of solids, liquids, and gas.

Answer:

could you tell me what the question is pls, that way I can help you

Explanation:

I think that mechanism is called a "lens turret".

Answer:

b. horizontal distance/time graph

Explanation:

d is incorrect because object is moving at the same pace the entire time

Thermal equilibrium is attained and the both rods are now at the same temperature.

Two bodies are said to have attained thermal equilibrium when the two bodies at the same temperature. It should be known that when two rods are firmly attached to each other heat flows from one rod to another.

As such, after some time, thermal equilibrium is attained and the both rods are now at the same temperature.

Learn more about thermal equilibrium:https://brainly.com/question/2637015

Answer:

the answer is C. rocket 4.

Explanation:

[tex]a = \frac{f}{m} \\ \\ c) a = \frac{120}{3.25} = 36.923...[/tex]

it's the biggest amongst the four.

rocket one has an acceleration of 34.782...

rocket two has an acceleration of 22.429...

rocket three has an acceleration of 26.666...

rocket four has an acceleration of 36.923

Answer: because when you remove the battery, the the magnet no longer has electricity flowing through it, therefore the magnetic field disappears. Thats why its called a temporary magnet

Explanation:

Awesome to see a chainsaw man fan! Here's your answer!

Answer:
Follow:

Explanation:

Facts  - Key Details Given:

P.E = mgh

P.E = (2)(9.8)(20)

P.E= 392 J

K.E = ¹/₂mv²

where;

v is velocity of the rock at the top of the cliff = 0

K.E = ¹/₂(2)(0)²

K.E = 0

P.E = mg(¹/₂h)

P.E = (2)(9.8)(¹/₂ x 20)

P.E = 196 J

K.E = ¹/₂mv²

where;

v is velocity of the rock at the halfway point = 14 m/s

K.E = ¹/₂(2)(14)²

K.E = 196 J.

Answer:

I can help, but

Explanation:

Where is the question?

We can see from the calculations that the acceleration of the proton is 1.43 * 10^7 ms-2.

Acceleration is the rate of change of velocity with time. We know that the magnetic force is obtained by;

F = qvB

q= 1.6 * 10^-19 C

v = 365 m/s

B =  4.10*10^-5 T

F = 1.6 * 10^-19 C * 365 m/s *  4.10*10^-5 T

F = 2.39 * 10^-20 N

Recall that the mass of the proton is 1.67 × 10−27 kg hence

a = F/m = 2.39 * 10^-20 N/1.67 × 10−27 kg  = 1.43 * 10^7 ms-2

Learn more about acceleration: https://brainly.com/question/12134554

Answer:here’s how you do it

Explanation:

Answer:

the gravitational potential energy is converted to kinetic energy

Explanation:

Because the conversation of the energy as a tool permits the calculation of the velocity just before it hits the surface