A person is riding a skateboard on a U-shaped ramp. At which point does the person have the greatest potential energy?(1 point)

on the downswing as the person is dropping into the ramp
on the downswing as the person is dropping into the ramp

at the top of the ramp before dropping in
at the top of the ramp before dropping in

in the middle of the ramp at the lowest point
in the middle of the ramp at the lowest point

on the upswing as the person is coming up the other side of the ramp

Vector is perpendicular to x axis or i component.

Hence i component is 0

j component is 63.5

[tex]\\ \sf\longmapsto \overrightharpoon{A}=0\hat{i} +63.5\hat{j}[/tex]

Speech choirs are performance groups that recite speeches in unison, often with elements of choreography and costuming to help bring the speech to life. Much like musical choirs, dynamic -- volume -- range, expression and accurate coordination of syllables are all important for a successful performance.

Answer:

Charles's law

Explanation:

Answer:

Benjamin was fastest

Explanation:

Allison- 150/2.5= 60mph

Benjamin- 175/2.73= 64.1

Lily- 160/2.58= 62.01

George- 155/2.46= 63.008

Answer:

Hiệu điện thế U=10 V được đặc vào giữ hai đầu một điện trở có giá trị R=25 Q cường độ dòng điện trở bằng bao nhiêu

i think it looks good

yea it correct

BTW yw if it's right

Answer:

-4000

Explanation:

jptjpdjsjsjsfbsjjdbabdjzjwjdjadjzjejxjaA

Answer:

right about everything real life and doing or you love doing

Explanation:

I did the same thing I got a hundred on it

1) workstation

2) Network interface card

3) hub

4) server

Hope this helped you- have a good day bro cya)

Explanation:

volume= 3cm×3cm×6cm=18cm3

Answer:

a device for repeatedly generating static electricity by induction.

Explanation:

Answer:

Putter

Explanation:

I looked it up. It said golf club but putter is the same thing I believe. :)

Answer:

pitching or sand wedge

Explanation:

his club can also be used to get out of sand traps.

Answer:

Explanation:

The kinetic energy of an object can be found by using the formula

[tex]k = \frac{1}{2} m {v}^{2} \\[/tex]

m is the mass

v is the velocity

From the question we have

[tex]k = \frac{1}{2} \times 1000 \times {26}^{2} \\ = 500 \times 676 \\ = 338000[/tex]

We have the final answer as

Hope this helps you

Answer: A person with a life vest floating on water, Ship floating on the ocean, Helium balloon rising in the air, etc.

Explanation: Cause I said so uwu

[tex]{\underbrace{\sf{PHOTO-ELECTRIC~EFFECT }}}[/tex]

The photoelectric effect is a phenomenon in which electrons are ejected from the surface of a metal when light is incident on it. These ejected electrons are called photoelectrons. It is important to note that the emission of photoelectrons and the kinetic energy of the ejected photoelectrons is dependent on the frequency of the light that is incident on the metal’s surface.

Answer:

Photoelectric effect is the phenomenon in which electrically charged particles are released from or within a material when it absorbs electromagnetic radiation. The effect is often defined as the ejection of electrons from a metal plate when light falls on it.

I think the answer is A

Explanation:

the bus has more kg than the car so. the bus need to stop first

Answer:

which wave sound wave or water wave

Answer:

16.7s

2x10^1 s (if you need a 1 significant digit answer)

Explanation:

The formula for average velocity is

Vavg = Δd/Δt

Fill in the known values

6m/s = 100m/Δt

Rearrange the equation

Δt = 100m/6m/s

Δt = 16.7s

note: this answer assumes that the person travels at a constant 6m/s (the person does not slow down or speed up)

The starting angle θθ of a pendulum does not affect its period for θ<<1θ<<1. At higher angles, however, the period TT increases with increasing θθ.

The relation between TT and θθ can be derived by solving the equation of motion of the simple pendulum (from F=ma)

−gsinθ=lθ¨−gain⁡θ=lθ¨

For small angles, θ≪1,θ≪1, and hence sinθ≈θsin⁡θ≈θ. Hence,

θ¨=−glθθ¨=−glθ

This second-order differential equation can be solved to get θ=θ0cos(ωt),ω=gl−−√θ=θ0cos⁡(ωt),ω=gl. The period is thus T=2πω=2πlg−−√T=2πω=2πlg, which is independent of the starting angle θ0θ0.

For large angles, however, the above derivation is invalid. Without going into the derivation, the general expression of the period is T=2πlg−−√(1+θ2016+...)T=2πlg(1+θ0216+...). At large angles, the θ2016θ0216 term starts to grow big and cause 

Answer:

Below

Explanation:

To find the wave speed of a wave you can use this formula :

     wavespeed (v) = (frequency) x (wavelength λ)

Plug in our values :

     v = (10Hz) x (2m)

     v = 20 m/s

Hope this helps!

Now, seriously !

There's a stream of objects flowing past you.

Ten of them pass you every second.

Each one is 2m long.

Don't you think you can figure out how fast they're flowing ?

Answer:

Explanation:

Basically the star slowly burns its hydrogen into Helium. Depending on the mass, the star will have a turbulent core where the Helium will be fully mixed or a radiative core where the helium will settle at the centre (remember it's heavier than Hydrogen). The second case is what happens in the Sun.

Answer:

letter C

Explanation:

Answer:

Given;

V = 230V

Power, P = 100W

time, t = 2hrs = 7200s

from,

P = IV

and Energy, E= Pt

E = 100*7200

E = 720000 Joules

E = 720KJ

Answer:

Formula  E(J) = P(W) × t(s)

3600 Seconds in an hour

7200 seconds in two hours.

watts = 100

100 x 7200 = 720000

Explanation:

Watts to joules calculation

The energy E in joules (J) is equal to the power P in watts (W), times the time period t in seconds (s):

E(J) = P(W) × t(s)

Energy cannot be created or destroyed, only converted from one form to another. These conversions can be shown in Sankey diagrams. Efficiency is a measure of how much useful energy is converted. Attachment 1

Modern energy-saving lamps and LEDs (light-emitting diodes) work in a different way. They transfer a greater proportion of electrical energy as light energy. Attachment 2

From the diagram, you can see that much less electrical energy is transferred, or 'wasted', as heat energy from the energy-saving lamp. It's more efficient than the filament lamp.

Calculating efficiency

The efficiency of a device, such as a lamp, can be calculated:

efficiency = useful energy out ÷ total energy in (for a decimal efficiency)

or

efficiency = (useful energy out ÷ total energy in) × 100 (for a percentage efficiency)

The efficiency of the filament lamp is 10 ÷ 100 = 0.10 (or 10%). This means that 10 per cent of the electrical energy supplied is transferred as light energy (90 per cent is transferred as heat energy).

The efficiency of the energy-saving lamp is 75 ÷ 100 = 0.75 (or 75 per cent). This means that 75 per cent of the electrical energy supplied is transferred as light energy (25 per cent is transferred as heat energy).

Note that the efficiency of a device will always be less than 100 per cent. Occasionally the power is shown in W instead of the energy in J. The equations are the same – just substitute power for energy:

efficiency = useful power out ÷ total power in (for a decimal efficiency)

or

efficiency = (useful power out ÷ total power in) × 100 (for a percentage efficiency)

This is the Sankey diagram for a typical energy-saving lamp:

you can find the resistance using this formula

R = V ÷ I    

where; V is the potential difference in volts, V

I is the current in amperes (amps), A

R is the resistance in ohms, Ω

During rubbing, [tex]^E^L^E^C^T^R^O^N^S[/tex] are transferred between the woolen cloth and the balloon.

Hope this helps!

[tex]GraceRosalia[/tex] here to help

Answer:

be mature, it's the only way to be called independent, I will help my parents with doing chores, you will meet new friends

Explanation:

it's just my own understanding

Answer:

1eating junk food

2 I will be a good girl

Answer:

acceleration=force*mass

a=fm

a=15*2.1

a=31.5

acceleration is 31.5

hope it helps

Answer:

Just convert the answers down, plug in the numbers and move the decimal to where it needs to be equal to.

Answer:

I have already given answer

Explanation:

see in upper comment there is my answer :)