Based on the pattern of reflections shown below, which of the following statements must be true?
A. The mirror is a plane mirror that is tilted at an angle to the vertical.
B. The mirror is a plane mirror that is exactly vertical.
C. The mirror is not a plane mirror.
D. None of the above are definitely true.

Answer:

The gravitational force between Saturn and it's moon is 1.62 m/s ^2

Explanation:

google it

Answer:

Explanation:

C bro

Answer:

The total distance to be covered by the athletes is 800 m

The displacement of the athletes when they touch the finish line is zero.

Explanation:

Given;

Length of the track, L = 200m

the Length of the track for a single round = 200 m

(a) Distance is a scalar quantity which has only magnitude;

If the athletes were expected to take four rounds of the track, then the total distance = 4 x 200 m = 800 m

(b) Also, if  the line of finish was same as the line of start, then displacement of the athletes when they touch the finish line is zero (0 meters). This is because displacement has both magnitude and direction. Once the athlete returns to his starting point, his displacement at that point is zero.

Answer:

The magnetic field is   [tex]B = 3 mT[/tex]

Explanation:

From the question we are told that

     The inner radius is  [tex]r_i = 1.00 mm =1*10^{-3} \ m[/tex]

      The outer radius is  [tex]r_2 = 3.00 \ mm = 3.0 *10^{-3} \ m[/tex]

       The distance from the axis of the conductor is [tex]d =2.0 \ mm = 2.0 *10^{-3} \ m[/tex]

      The current carried by the conductor is  [tex]I = 80 A[/tex]

According to Ampere's circuital law , the magnetic field at a point that is  [tex]r_3[/tex]  from the axis of the conductor

                  [tex]B = \frac{\mu_oI}{2 \pi d } [\frac{d - r_1}{r_2 -r_1} ][/tex]

Where [tex]\mu_o[/tex] is the permeability of free space with a value of [tex]\mu_o = 4 \pi *10^{-7} N/A^2[/tex]

substituting values

                  [tex]B = \frac{(4 \pi *10^{-7})(80)}{2 * 3.142 * 2 *10^{=3} } [\frac{(2^2 - 1 ^2 )*10^{-3}}{(3^2 - 1^2) *10^{-3}} ][/tex]

                 [tex]B = 3 mT[/tex]

Answer:

The Sun derives all its energy from a fusion cycle. In that process, tiny hydrogen molecules combine into a continuous proton-proton chain to create larger helium nuclei. The above figure illustrates the fusion of hydrogen into helium.

Explanation:

Hope this helps.

Answer:

nuclear fusion

Explanation:

In this process, small hydrogen molecules fuse together to form bigger helium nuclei in a continuous proton-proton chain.

Answer:

42m/s

6.06s

Explanation:

To find the initial velocity and time in which the ball is fling over the ground you use the following formulas:

[tex]x_{max}=\frac{v_o^2sin(2\theta)}{g}\\\\x_{max}=vt_{max}[/tex]

θ: angle = 45°

vo: initial velocity

g: gravitational constant = 9.8m/s^2

x_max: max distance = 180 m

t_max: max time

by replacing the values of the parameters and do vo the subject of the first formula you obtain:

[tex]v_o=\sqrt{\frac{gx_{max}}{sin(2\theta)}}\\\\v_o=\sqrt{\frac{(9.8m/s^2)(180m)}{sin(2(45\°))}}=42\frac{m}{s}[/tex]

with this value of vo you calculate the max time:

[tex]t_{max}=\frac{x_{max}}{v}=\frac{x_{max}}{v_ocos(45\°)}\\\\t_{max}=\frac{180m}{(42m/s)cos(45\°)}=6.06s[/tex]

hence, the initial velocity of the ball is 42m/s and the time in which the ball is in the air is 6.06s

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TRANSLATION:

Para encontrar la velocidad inicial y el tiempo en el que la pelota está volando sobre el suelo, use las siguientes fórmulas:

θ: ángulo = 45 °

vo: velocidad inicial

g: constante gravitacional = 9.8m / s ^ 2

x_max: distancia máxima = 180 m

t_max: tiempo máximo

reemplazando los valores de los parámetros y haciendo el tema de la primera fórmula que obtiene:

con este valor de vo usted calcula el tiempo máximo:

por lo tanto, la velocidad inicial de la pelota es de 42 m / sy el tiempo en que la pelota está en el aire es de 6.06 s

Answer: its low

Explanation:

Answer:

I = 0.75 A

Explanation:

The question is not to calculate the resistance, but to calculate the current. (The resistance is already given by the value of 2 Ohm).

U = I * R

I = U / R

with U = 1.5 V and R = 2 Ohm

I = 1.5 / 2

I = 0.75 A

Answer:

During winters the planetary boundary layer is thinner as the cooler air near the earth's surface is dense. The cooler air is trapped under the warm air above that forms a kind of atmospheric 'lid'. This phenomenon is called winter inversion

Explanation:

Answer:

multiply 65kg and 3m/s^2

to get 195kgm/s

or 195N

wait is that 3m/s or 3m/s^2?

Answer:

The answer is 1/16

Explanation:

1. Persistence of vision refers to the optical illusion that occurs when visual perception of an object does not cease for some time after the rays of light proceeding from it have ceased to enter the eye. 2. The persistence of vision for normal eye is 1/16 if a second.

Answer:

The magnitude of the magnetic field created is 5 x 10⁻⁷ T

Explanation:

Given;

magnitude of current, I = 10.0 A

distance of the magnetic field, r = 4.0m

Apply Biot-Savart Law to determine the magnitude of of the magnetic field created;

[tex]B = \frac{\mu_oI}{2 \pi r}[/tex]

where;

B is the magnitude of of the magnetic field

μ₀ is constant

I is current

r is the distance of the field

[tex]B = \frac{4 \pi*10^{-7} *10}{2 \pi*4} = 5*10^{-7} \ T[/tex]

Therefore, the magnitude of the magnetic field created is 5 x 10⁻⁷ T

Explanation:

1) reduction in current

2)less no. of coils per unit length

3) removal of soft iron core

Answer:

The shorter train has a length of 600m

Explanation:

The equation of motion of the first train can be written as:

[tex]x'=v't[/tex]  (1)

v' = 108km/h = 30m/s

Furthermore, you can write the equation of motion of the second train as:

[tex]x=(200+l)+vt[/tex]  = xo + vt  (2)

v = 36km/h = 10m/s

where you have taken the initial position as measured from the front of the first train to the front of the second one. l is the length of the second train and 200 the separation of it respect to the first train.

For t = 40 both trains have the same position, that is, x=x'. Then, you equal equations (1) and (2), replace t=40, and solve the equation for l:

[tex]x'=x\\\\v't=200+l+vt\\\\(30m/s)(40s)=200+l+(10m/s)(40s)\\\\l=600m[/tex]

Hence, the first train has a length of 600 m

The train behind, or the second train, has twice the length of the first train:

[tex]l'=2l=2(600m)=1200m[/tex]

The shorter train has a length of 600m

Answer:

10,000

Explanation:

200,000/20 = power needed

200,000/20 = 10,000

Hope this Helps!

Answer:

10,000 Watts

Explanation:

Power is the ratio of work to time, or work over time. It can be found using the following formula.

p=w/t

where p is the power, w is the work, and t is the time.

The project needed 200,000 Joules, and it took 20 seconds to complete the project. Therefore, w=200,000 and t=20. Substitute these values into the formula.

p=200,000/20

Divide

p=10,000

Add appropriate units. The units for power is Watts.

p=10,000 Watts

10,000 Watts of power is needed.

Answer:

Explanation:

When the charge of a circuit reaches the capacitor, all charge is distributed in the surface of the capacitor in order to create an electric field. The opposite of this charge is also in the capacitor, but separated.

When the capacitor receive more charges, its stability changes. Thus, the charge in one of the plates of the capacitor demands that charge on the other plate move out of the capacitor to equilibrate the charge. Thus, the current in the circuit is not interrupted.

Answer:

It gets stored somewhere in the capacitor

Explanation:

I got it right

should be 1

Explanation:

because what do you use in class and has a lever

Answer:

6.81 x 10^-4

Explanation:

Answer:

C

Explanation:

The temperature of an object does not change when it is going through a phase change, since there is a single specific point on the temperature gradient where that change occurs. Once the phase change has occurred, the water's temperature can continue to change in that direction, but during the phase change it does not. Hope this helps!

Answer: The answer is C

Explanation:

Hope it helps :)

So the right answer is 4kg/m^3.

Look at the attached picture

Hope it will help you

Good luck on your assignment

Answer:

The answer is option 4.

Explanation:

Firstly, you have to convert the mass of tea bagto kilogram as the question wants the unit in kg/m³.

[tex]1000g = 1kg[/tex]

[tex]100g = 1kg \div 10[/tex]

[tex]100g = 0.1kg[/tex]

So the mass of tea bag is 0.1 kg. Next you have to use density formula ρ = mass/volume. Then you have to substitute the values into the formula :

[tex]ρ = \frac{mass}{volume} [/tex]

Let mass = 0.1kg,

Let volume = 0.025m³,

[tex]ρ = \frac{0.1}{0.025} [/tex]

[tex]ρ = 4kg \: per \: {m}^{3} [/tex]

Answer:

It slows it down.

Explanation:

Higher the velocity, higher the friction. Friction is the force OPPOSITE to whatever the force is going.

Answer:

9.01amp

Explanation:

Power = V^2/R

Given that v = 11volts, P = 99watts

99 = 11^2/R

11×11 = 99R

121= 99R

R = 121/99

R= 1.22ohms

From ohms Law; V = IR

11volts = I × 1.22ohms

I = 11/1.23

I = 9.01 amp

Answer: Distance

I’m not sure if it is correct, but I am pretty sure it is......

I hope this helps :)

Answer:

Magnetic field

Explanation:

Answer:

magnetic field

Explanation:

Answer:

Because even if iron is magnetic its not a magnet it self unless rubbed a magnetic object

Answer: When the worker is on the top rung

Explanation: When the ladder was initially resting on the wall, the torque from the normal reaction on ladder from the horizontal surface is equal to the torque from the vertical surface on ladder.

The weight of the worker produces a torque which is in the direction of the torque from the normal reaction on ladder, produced by the vertical surface. Therefore for the ladder to stay in rotational equilibrium, the torque on ladder from the normal reaction produced by the horizontal surface must increase.

This increase is possible when the worker is on the lower rung, but as the worker goes high, the magnitude of normal reaction from the vertical surface would increase, thereby increasing the risk of slipping of ladder.

Answer:We have seasons because the earth is tilted (wonky) as it makes its yearly journey around the sun. The Earth's axis is tilted at an angle of 23.5 degrees. This means that the Earth is always "pointing" to one side as it goes around the Sun.

Explanation:

got this from the internet

Answer:

The energy source which can cause the turbine (wooden wheel) to spin and generate electrical energy is hydro-energy source.

Explanation:

The energy source which can cause the turbine (wooden wheel) to spin and generate electrical energy is hydro-energy source. Hydro energy source, is the energy source gotten from the force of falling water.

Hydro energy causes the turbine to spin converting it mechanical energy and finally to electrical energy using a generator.

Force of falling water (hydro-energy source) ------>spinning of turbine (mechanical energy) ---------------> electrical energy

Answer: [tex]-2502N[/tex]

Explanation:

[tex](V_2)^2=(V_1)^2+2ad[/tex]

where;

[tex]V_2[/tex] = final velocity = 0

[tex]V_1[/tex] = initial velocity = 60 km/h = 16.67 m/s

[tex]a[/tex] = acceleration

[tex]d[/tex] = distance

First all of, because acceleration is given in m/s and not km/h, you need to convert 60km/h to m/s. Our conversion factors here are 1km = 1000m and 1h = 3600s

[tex]60km/h(\frac{1000m}{1km} )(\frac{1h}{3600s} )=16.67m/s[/tex]

Solve for a;

[tex](V_2)^2=(V_1)^2+2ad[/tex]

Begin by subtracting [tex](V_1)^2[/tex]

[tex](V_2)^2-(V_1)^2=2ad[/tex]

Divide by 2d

[tex]\frac{(V_2)^2-(V_1)^2}{2d} =a[/tex]

Now plug in your values:

[tex]a=\frac{(0)^2-(16.67 m/s)^2}{2(50m)}[/tex]

[tex]a=\frac{0-277.89m^2/s^2}{100m}[/tex]

[tex]a=-2.78m/s[/tex]

If you're wondering why I calculated acceleration first is because in order to find force, we need 2 things: mass and acceleration.

[tex]F=ma[/tex]

m = mass = 900kg

a = acceleration = -2.78m/s

[tex]F=(900kg)(-2.78m/s)\\F=-2502N[/tex]

It's negative because the force has to be applied in the opposite direction that the car is moving.

The first two choices are both false, but the second one is the falser one.

All electricity sources do not have the same voltage. The outlet in your bedroom wall supplies 120 volts, but the USB port on your laptop only supplies 5 volts, and the battery in your cellphone only supplies 3.7 volts.

All electricity sources have the same voltage isn't true

All electricity sources usually have different voltage as the number of

electrons needed to power them varies. For example heating appliances

usually have a higher amount of voltage as it requires more electrons to

increase the temperature.

The higher the amount of voltage , the higher the amount of electrons which collides more and translates to faster current  which is correct.

Voltage is also known as the difference in electrical potential energy and the unit for voltage is Volt (V).

Read more on  https://brainly.com/question/16589216

Answer:

The ratio of the potential difference across a metallic conductor to the current in the conductor is known as.

B. Resistance.

Explanation:

According to ohms law   " the current  passing through a conductor is directly proportional to the potential difference between the ends provided the temperature of the wire remains constant".

What is resistance ?

Resistance is a measure of the opposition to current flow in an electrical circuit

what is a resistor ?

a resistor is a n electric conductor which forms resistance to free flow of electric current, the resistance is measured in Ω

The ratio of the potential difference across the conductor to the current is called resistance

It is defined as the ratio of the potential difference across the conductor to the current. The resistance is measured in Ω.

[tex]R = \dfrac VI[/tex]

Where,

[tex]R[/tex] - resistance

[tex]V[/tex]- voltage (Potential difference)

[tex]I[/tex] - current

Therefore, the ratio of the potential difference across the conductor to the current is called resistance.

To know more about resistance.

https://brainly.com/question/4289257