Use trigonometry to find the missing values of the sides of the triangles below.

Answer:

¿Qué sistemas? ¿Hubo otra parte de la pregunta que quizás hayas olvidado hacer?

Explanation:

In english:

(question) In the systems listed below, indicate where you think the energy they use comes from and clarify whether they only use or can accumulate

(answer) What systems? Was there another part of the question you might've forgotten to put?

Answer:

g

Explanation:

bhhhhhhjjjhhuydszzzzzzzxz

Answer:

Disconnections and discrepancies 

between school-based norms and values and those of 

some pupils, especially those from 

nondominant cultures, are referred to 

as cultural discontinuity.

☆-----------------------------☆

☆Hope it helps...

☆Have a great day!!!

Answer:

Explanation:

Newton's 2nd Law say that F = ma which is the sum of the forces acting on an object is equal to the object's mass times the acceleration at which it is moving. That means that the forces acting on this tree are F which is the Force the man needs to exert to move the tree, and f which is the force the tree is exerting in an effort to stay right where it is. That alters our 2nd Law equation to F - f = ma. BUT if the tree isn't moving, the acceleration is 0, making the whole right side of that equation go to 0. That means that F = f. Phew! Let's do that.

f = μ[tex]F_n[/tex] where f is the frictional force, μ is the coefficient of static friction, and [tex]F_n[/tex] is the weight of the object, which are given as 670 N. Filling in:

f = .5(670) so

f = 335 N (that is not using the rules of significant digits properly, but if you use them properly, the answer is not one of the choices, so...)

C is the one you want.

Answer:

Iron has a higher heat capacity than copper

Explanation:

The heat capacity of a substance is defined as the amount of heat required to raise the temperature of an object by 1°C.

The higher the heat capacity of a substance, the longer the time it takes for the substance to become hot when heated.

Since the copper rod becomes too hot to hold much sooner than the iron rod, it means that iron has a higher heat capacity than copper.

the International System of Units, the fundamental units are: The meter (symbol: m), used to measure length. The kilogram (symbol: kg), used to measure mass. The second (symbol: s), used to measure time. The ampere (symbol: A), used to measure electric current.

Answer:

The electromagnetic spectrum comprise a lot of waves length. Usually, different waves length are called as different lights, and a light source can emit in more than a different wave length, as the sun does, for example. The sun emit the visible light, UV light, infrared, etc.

Answer:

[tex]25\%[/tex] of the wavelength is between resonances in a closed end tube.

Explanation:

In an one end closed tube, the fundamental resonance occurs when a node is created at the closed end and an antinode is created in the open end.

Thus, for fundamental resonance, the entire length of the tube encloses one-fourth of the wavelength of the standing wave.

The formula to calculate the percentage of the wavelength in a closed end tube is given by

[tex]f=\frac{L}{\lambda}\times100\%........................(1)[/tex]

Here, [tex]f[/tex] is the required percentage, [tex]L[/tex] is the length of the tube and [tex]\lambda[/tex] is the wavelength of the standing wave.

Substitute [tex]\frac{\lambda}{4}[/tex] for [tex]L[/tex] into equation (1) o calculate the required percentage.

[tex]f=\dfrac{\frac{\lambda}{4}}{\lambda}\times100\%\\~~~=25\%[/tex]

Answer:

The frequency you will hear is 2,639.7 Hz

Explanation:

Given;

source frequency, Fs = 2300 Hz

velocity of the source, Vs = 30 m/s

observed velocity, Vo = 18 m/s

speed of sound in air, V = 343 m/s

Apply Doppler effect, the frequency you will hear is known as observed frequency;

The observed frequency will be greater than the source frequency, since the distance between the source and the observer decreases.

[tex]F_s = F_0(\frac{V- V_0}{V + V_s} )\\\\2300 = F_0 (\frac{343 - 18}{343 + 30} )\\\\2300 = F_0(\frac{325}{373} )\\\\F_0= 2300(\frac{373}{325}) \\\\F_0 = 2,639.7 \ Hz[/tex]

Note: the aim is to increase the observed frequency.

Subtracting the observed speed from the speed of sound for the numerator will ensure an increase in the observed frequency, also adding the source speed to the speed of sound for the denominator will equally ensure an increase in the observed frequency.

Answer:

D. Electric Charges

Answer:

The capacitance of the other capacitor is 1333.3 pF.

Explanation:

C' = 200 pF, V' = 100 V, C'' , V''= 0

Common potential, V = 60 V

Use the formula of the common  potential

[tex]V = \frac{C' V' + C'' + V''}{C'+ C''}\\\\60 = \frac{200\times 100 + 0}{200 + C''}\\\\1200+ 6 C''= 2000\\\\C'' = 1333.3 pF[/tex]

Complete question:

A hydraulic jack is used to lift a car by applying a force of 120N at the pump piston, if the area of the ram and pump piston are 100cm squared and 1m squared respectively. What is the weight of the car?

Answer:

the weight of the car is 1.2 N

Explanation:

Given;

applied force, F₁ = 120 N

area of the effort (pump), A₁ = 1 m²

area of the load (ram), A₂ = 100 cm² = 1 x 10⁻² m²

let the weight of the car = F₂

The applied pressure is constant and the following equations can be used to calculate the weight of the car.

[tex]P = \frac{F_1}{A_1} = \frac{F_2}{A_2} \\\\F_2 = \frac{F_1 \times A_2}{A_1} \\\\F_2 = \frac{120 \times (1\times 10^{-2})}{1} \\\\F_2 = 1.2 \ N[/tex]

Therefore, the weight of the car is 1.2 N

Answer:

Current in the circuit(I) = 0.5 ampere

Explanation:

Given:

Number of resistors = 2 (10 ohm each)

Series of resistors

EMF = 10 volt

Find:

Current in the circuit(I)

Computation:

Total resistance in series = R1 + R2

Total resistance in series = 10 + 10

Total resistance in series = 20 ohm

Current in the circuit(I) = EMF / Total resistance in series

Current in the circuit(I) = 10 / 20

Current in the circuit(I) = 0.5 ampere

Answer:

Newton's laws of motion relate an object's motion to the forces acting on it.Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force.

Explanation:

It is true that the metal will begin to emit electrons at varied speeds depending on the intensity of the light when it is struck at a minimal wavelength.

When a waveform signal is propagated in space or over a wire, the wavelength is the separation between two identical locations (adjacent crests) in the adjacent cycles.

If you are employing light with a high enough frequency, the number of electrons ejected grows as the light source's brightness rises.

The velocity of the expelled electrons increases as the frequency is raised above the threshold.

Thus, the metal will begin to emit electrons at varied speeds depending on the intensity of the light when it is struck at a minimal wavelength.

To learn more about Wavelength, refer to the below link:

https://brainly.com/question/1263539

# SPJ2

Answer:

b

Explanation:

[tex]\huge\boxed{\fcolorbox{black}{red}{ QUESTION}}[/tex]

There are two sets of resistors joined in series in a circuit. Set 1 has two resistors of 10Ω and 40Ω in parallel combination. Set 2 has three resistors of 20 Ω, 30 Ω and 60 Ω in parallel combination. A potential difference of 12 V is applied across the combination.

[tex] \orange{\underline{\huge{\bold{\textit{\green{\bf{GIVEN}}}}}}}[/tex]

Two set of Parallel resistors

Contains two resistors of --> 10Ω and 40Ω

Contains three resistors of --> 20 Ω, 30 Ω and 60Ω

Potential Difference Of 12 V

[tex]{\bold{\orange {To \: Find }}}[/tex]

Draw a circuit diagram to represent this arrangement Calculate

(a) the total resistance and

(b) the total current flowing in the circuit.

[tex] \huge\mathbb{\red A \pink{N}\purple{S} \blue{W} \orange{ER}}[/tex]

FOR DIAGRAM REFER ATTACHMENT!

[tex]{\bold{\green{\star{\red {Part \: 1:- The \: Total \: Resistance }}}}}[/tex]

First we calculate the total resistance of each parallel combination:-

FIRST SET Contains two resistors of 10Ω and 40Ω

so total resistance-->

[tex] \frac{1}{Rs1} = \frac{1}{R1} + \frac{1}{R2} \\ \\ \frac{1}{Rs1} = \frac{R1 + R2}{R1R2} \\ \\ \frac{1}{Rs1} = \frac{10 + 40}{400} \\ \\ \frac{1}{Rs1} = \frac{50}{400} \\ \\ \frac{1}{Rs1} = \frac{1}{8} \\ \\ Rs1 = 8 Ω[/tex]

SECOND SET Contains three resistors of 20 Ω, 30 Ω and 60Ω

so total resistance-->

[tex] \frac{1}{Rs2} = \frac{1}{R1} + \frac{1}{R2} + \frac{1}{R3} \\ \\ \frac{1}{Rs2} = \frac{R1 + R2 +R3}{R1R2R3} \\ \\ \frac{1}{Rs2} = \frac{3+ 2 + 1}{60} \\ \\ \frac{1}{Rs2} = \frac{6}{60} \\ \\ \frac{1}{Rs2} = \frac{1}{10} \\ \\ Rs2 = 10Ω[/tex]

Now by having Total Resistance of Set one and set two we can add them by series formula.

[tex]R = Rs1 + Rs2 \\ R = 8 + 10 = 18 \: Ω[/tex]

[tex]{\bold{\green{\star{\orange{Part \: 2:- The \: Total \: Current \: Flowing \: In \: The \: Circuit. }}}}}[/tex]

Total Resistance of the circuit = 18 Ω

Potential Difference Of the circuit = 12 V

So Total current-->

[tex] V = IR \\ 12 = 18 \times I \\ \\ I = 0.66 \: A[/tex]

Answer:

Explanation:

35 up 35 down cancel out.

25 forward minus 10 pulling back, so:

25-10

= 15N Right

3 is false 2 is true and the rest true

Answer;

True, False, False, True, True

Answer:

television

Explanation:

a television refracts light (the light bounces off of the screen

Answer:

Suppose you have a glass slab as a paper weight, if you keep it on the paper, dont you see something strange? The paper becomes elevated in the glase slab. Everyone sees a waterbottle or glass everyday, while seeing through it, does everything seem normal? Nope. That's refraction.

Explanation:

You must have seen a prism, right? It makes light split into the visible electromagnetic spectrum.

Answer:

2.76×10⁻¹⁰ C

Explanation:

Applying,

V = W/q................... Equation 1

Where V = Electric Potential, E = Electric potential energy, q = charge.

make q the subject of the equation

q = W/V................ Equation 2

From the question,

Given: W = 4.26×10⁻⁸ J, V = 154.5 V

Substitute these values into equation 2

q = 4.26×10⁻⁸/154.5

q = 2.76×10⁻¹⁰ C

[tex]given \: the \: length \: of \: one \: side \: of \: a \: cube \: \\ = 2cm \\ so \: we \: know \: the \: volume \: of \: a \: cube \: = {side}^{3} \\ so \: the \: volume \: of \: the \: cube \: here \: = {2}^{3} {cm}^{3} = \: 8 {cm}^{3} \\ we \: know \: density \: of \: a \: substance \: = \: \frac{mass}{volume} \\so \: mass \: = density \times volume \\ density = 6 \frac{g}{ {cm}^{3} } \\ volume \: = 8 {cm}^{3} \\ so \: \: mass \: = (6 \times 8)( {cm}^{3} \times \frac{g}{ {cm}^{3} }) \\ 48gram \: (ans) [/tex]

Answer:

v=FX

v=34(2.0)

v=68m/s

opaque glass does not allow light to pass through it.

Answer:

3.33 m/s

Explanation:

1600 divided by 8 comes out to 200, so supposing we're measuring the speed in terms of Meters Per Second, we would need to divide 200 by 60 to take account of the individual seconds as opposed to simply 200 meters per minute.

Power is dissipated, not consumed.

This circuit dissipates 4.5 watts.

Answer: Concave lens makes the virtual image. So the image distance turns to be negative which also cause the magnification to be negative.

Answer:

Total Resistance in circuit is Fourteen Ohms (14 Ω).

Explanation:

How do we know, if the resistors are connected in series, the total resistance is the sum of all the resistors.

(Important: The total resistance can only be added just when the resistors are connected in series)

Then, total resistance (TR ) is the sum of all resistors (T1 + T2, in this case)

TR = T1 + T2

According to problem data, we have:

TR = 8 Ω + 6 Ω

TR = 14 Ω

                                                                              ║Sincerely, ChizuruChan║