A girl on a skateboard (total mass of 40kg) is moving at a speed of 10m/s at the bottom of a long ramp. The ramp is inclined at 20 degrees with respect to the horizontal. How far must she travel upward along the ramp before stopping?

Answer:

10 m to 1000 m

Explanation:

Using,

V = λf........... Equation 1

Where V = speed of electromagnetic wave, λ = wavelength, f = frequency

λ = V/f.......... Equation 1

Given: v = 3×10⁸ m/s, f = 3×10⁵ Hz to 3×10⁷ Hz

From the question,

The lowest wavelength is

λ' = 3×10⁸/3×10⁷

λ' = 10 m

While the highest wavelength is

λ = 3×10⁸/3×10⁵

λ  = 1000 m

Hence the range of wavelenths of the eave is 10 m to 1000 m

Your answer would be C.

A step-up transformer is a transformer that raises voltage from main to secondary by having more secondary winding turns than primary winding turns.

Hope this helps; have a great day!

Answer:

b

Explanation:

because the metalloids are the thing in the middle

Answer: 2

Explanation:

The average speed of the inchworm 1 at 2 minutes in the given graph is determined as 0.025 m/s.

The average speed of an object is the rate of change of displacement of the object with time.

The average speed of the inchworm 1 at 2 minutes is calculated as follows;

v = D/t

v = 3 m/(2 min x 60 s)

v = 0.025 m/s

Thus, the average speed of the inchworm 1 at 2 minutes is 0.025 m/s.

Learn more about average speed here: https://brainly.com/question/6504879

Answer:

Long-period comets have orbital periods longer than 200 years. ... Since it is the sublimation of these volatiles from the nucleus of the comet as it nears the Sun that gives rise to the coma and highly-visible tails, long-period comets have more material with which to put on a show.

Explanation:

Answer:

C) Unscrew one light. If the other lights turn off, it's a series circuit.

Explanation:

THIS IS THE COMPLETE QUESTION BELOW;

A strand of 10 lights is plugged into an outlet. How can you determine if the lights are connected in series or parallel? A) Unscrew one light. If the other lights stay on, it's a series circuit. B) Unplug the strand. If the first light stays on, it's a series circuit. C) Unscrew one light. If the other lights turn off, it's a series circuit. D) Cut the strand in half. If the plugged in half stays on, it's a series circuit.

SERIES CIRCUIT

In this circuit, the components there are in the same path, the entire circuit has the same current, each of the components posses different voltage drop. Hence, failure of one components to work, there will be break in entire circuit then other components cease to work.

PARALLEL CIRCUIT

This circuit has equal voltage drop across all the components, any problem in a component will not has effect on other components.

Therefore, if one want to determine if a light connection is in series or in parallel, one of the light can be unplugged if others stop working it means it's series, if other works it's parallel.

Explanation:

Cells are divided by the reproductive means in unicellular organisms; whereas in multicellular organism they are the means for tissue development and maintenance in multicellular organisms. In adults, tissue renewal rather than development is the most common cell division in which several forms of cells are constantly replaced.

Answer:

The Answer is gonna be B. The normal force (magnitude and direction)

Answer:

solution given ;

mass[m]=55kg

acceleration due to gravity [g]=10m/s²

weight[W]=mg=55×10=550 Newton

Answer:

The observable universe is a ball-shaped region of the universe comprising all matter that can be observed from Earth or its space-based telescopes and exploratory probes at the present time

Explanation:

Answer:

its c

Explanation:

Answer: Electric field is given as

E = V/d

E = 220 v / 0.0056m

E = 39285.71 v/m

Or

E = 39285.71 N/C

Explanation: Therefore electric field is 39285.71 V/m

Answer:

Answer: Electric field is given as

E = V/d

E = 220 v / 0.0058m

E = 37931.03 v/m

Or

E = 37931.03 N/C

Explanation:

e=v/d

The balanced formula is B.

Answer:

Hightail ur butt to walmart and get a squash, cut off the top and scoop out a hole the size of the egg, put the egg in but make sure there's as little space as it can be so the egg wont move around in it, then put the top of the squash back on and cover it in duct tape to keep the top from flying off.

Explanation:

Answer:

Aceleración media = 0.5 m/s²

Explanation:

Dados los siguientes datos;

Velocidad inicial = 15 m/s

Velocidad final = 20 m/s

Tiempo, t = 10 segundos

Para encontrar la aceleración;

Aceleración se puede definir como la tasa de cambio de la velocidad de un objeto con respecto al tiempo.

Esto simplemente significa que la aceleración viene dada por la resta de la velocidad inicial de la velocidad final a lo largo del tiempo.

Por lo tanto, si restamos la velocidad inicial de la velocidad final y la dividimos por el tiempo, podemos calcular la aceleración de un objeto. Matemáticamente, la aceleración viene dada por la fórmula;

[tex] Aceleracion = \frac{final \; velocidad - inicial \; velocidad}{tiempo}[/tex]

Sustituyendo en la fórmula, tenemos;

[tex] Aceleracion = \frac{20 - 15}{10}[/tex]

[tex] Aceleracion = \frac{5}{10}[/tex]

Aceleracion = 0.5 m/s²

Por tanto, la aceleración media es igual a 0.5 metros por segundo al cuadrado.

Answer:

1,3,7,8

Explanation:

Edge 2021

it's C

because the faster an object moves the more kinetic energy it has.

Answer:

I think its dense and solid and located near a star.

Explanation:

Hope this helps, good luck.

Answer:

sunspots

Sunspots are areas in the sun that has a magnetic field is about 2 thousand times stronger than Earth's. Also is much higher than anywhere else on the Sun.

Answer: 4 s

Explanation:

Given

The applied force is 70 N

mass of the rock is 28 kg

initial velocity [tex]u=25\ m/s[/tex]

final velocity [tex]v=15\ m/s[/tex]

Deceleration provided by force is

[tex]a=-\dfrac{70}{28}=-2.5\ m/s^2[/tex]

using the equation of motion

[tex]v=u+at\\\Rightarrow 15=25-2.5t\\\Rightarrow 2.5t=10\\\Rightarrow t=4\ s[/tex]

Answer:

V = -0.4 m/s

Explanation:

Given that,

Mass of cart 1, m₁ = 3 kg

Speed of cart 1, v₁ = 2 m/s

Mass of cart 2, m₂ = 2 kg

Speed of cart 2, v₂ = -4 m/s (left)

aWe need to find the velocity of the carts after the collision if they stick together. Let the common speed be V. Using the law of conservation of momentum to find it such that,

[tex]m_1v_1+m_2v_2=(m_1+m_2)V\\\\V=\dfrac{m_1v_1+m_2v_2}{(m_1+m_2)}[/tex]

Put all the values,

[tex]V=\dfrac{3\times 2+2\times (-4)}{(3+2)}\\\\=-0.4\ m/s[/tex]

So, the velocity of the carts after the collision is equal to 0.4 m/s to the left.

Answer:

Answer: there are two factors on which centre of mass depends

*its shape and

*the way mass distributed on its shape.

These two factor decide whether centre of mass of gravity lie inside the body or outside the body.

If the body is regular the centre of mass lies inside the body if it is not regular then it lies outside the body

Explanation:

Answer:

[tex]n=4.5\times 10^{13}[/tex]

Explanation:

Initial charge, [tex]q_1=10\mu C[/tex]

After conduction, charge on the body becomes,  [tex]q_2=-2.8\mu C[/tex]

We need to find the number of electrons gained by this charged body.

Net charge,

[tex]q=q_1+q_2\\\\=10+(-2.8)\\\\=7.2\ \mu C[/tex]

Let n be the number of electrons gained by this charged body. So,

[tex]q=ne\\\\n=\dfrac{q}{e}\\\\n=\dfrac{7.2\times 10^{-6}}{1.6\times 10^{-19}}\\\\=4.5\times 10^{13}[/tex]

So, [tex]4.5\times 10^{13}[/tex] electrons gained by this charged body.

Answer:

we need the graph to answer the question.

Answer:

The gravity from the person's hand is weaker than the gravity from the pull of the earth

Explanation:

The gravity from the person's hand is weaker than the gravity from the pull of the earth

Answer:

Y

Explanation:

The fulcrum is the point where the scissor blades are joined together. The force or effort is the end or handle of the scissors. The parts of a pair of pliers are similar to the scissors.