A 15 W electric shaver is used for 3 minutes. How much energy does it use in joules?​

Answers

Answer 1
P=change in E/t
Change in E=p*t
=15*3
=45

The answer is 45J.

Related Questions

Match the situation with the energy type.

Answers

Answer:

snowplow would be m, sun r , hb n , FB e ,and tiaa c

Using the data above, what would be the independent variable? Type of coke (Diet Coke or Coca Cola) Height of Explosion Trial number or Number of Mentos?

Answers







Diet coke seeing as it doesn’t even match close with coke

The answer is A. Type of coke (Diet or Coca-Cola) is the correct answer.

(I took the test.)

A student is creating a model of a concave lens. The diagram shows her incomplete model.



Which action would best complete her model?
A
The student should draw the light moving into the lens and then exiting in converging lines.

B
The student should draw the rays of light moving into the lens and then exiting at right angles.

C
The student should draw the rays of light moving into the lens and then exiting in a straight path.

D
The student should draw the light moving into the lens and then exiting in lines that are spreading out.

Answers

Answer:

D

Explanation:

I’m pretty sure it’s correct but I don’t really know. Just trying to pass science

Answer:

The correct answer is D trust me I did the test

When the concave lens moves in it exit by spreading out like water

. If a train going 60 m/s hits the brakes, and it takes the train 25 seconds to stop, what is the train’s acceleration

Answers

0.706 is the answer...

How high (in meters) can a 40 N force move a load, when 395 J of work is done? (round to the nearest 10th)

Answers

Answer:

9.9 m

Explanation:

From the question given above, the following data were obtained:

Force (F) = 40 N

Workdone (Wd) = 395 J

Height (h) =?

The height can be obtained as follow:

Potential energy = mgh = Fh

395 = 40 × h

Divide both side by 40

h = 395 / 40

h = 9.9 m

Thus, the height is 9.9 m.

A small difference between means may not be statistically significant, but it could reach statistical significance with a large sample becausea) As N increases, the standard error gets smaller, reflecting less variability in sample means, which allows greater sensitivity to detect small but significant differences.b) As N increases, distributions get more heterogeneous, allowing small differences to be detected.c) The overlap between distributions grows as sample size increases.d) The difference between means gets larger as sample size increases

Answers

Answer:

Increasing the sample size could make a small difference between means reach statistical significance because;

a) As N increases the standard error gets smaller reflecting less variability in sample means, which allows greater sensitivity to detect small but significant differences

Explanation:

The p-value of a test statistic is used to express the level of significance of the test result. A significant result is typically considered as one with a small p-value of less than or equal to 0.05 at which point we reject the null hypothesis

The p-value can be made smaller by either

1) Increasing the size of the sample (N)

2) Decreasing the standard error

3) Increasing the difference between the hypothesized parameter and the statistic of the sample

The standard error, SE, is given as follows;

[tex]SE = \dfrac{\sigma}{\sqrt{N} }[/tex]

Where;

σ = The standard deviation of the sample

n = The sample size

Therefore the standard error decreases, gets smaller,  with increasing sample size, N

Therefore, the small difference between the sample mean could reach statistical significance with a large sample because as N increases the standard error gets smaller reflecting less variability in sample means, which allows greater sensitivity to detect small but significant differences.

Si un ciclista se mueve a una velocidad de 5 m/s y acelera 1 m/s2, a los 10 segundos su velocidad será

Answers

Answer:

A los 10 segundos su velocidad será 15 [tex]\frac{m}{s}[/tex]

Explanation:

La aceleración de un objeto es una magnitud que indica cómo cambia la velocidad del objeto en una unidad de tiempo.

En otras palabras, la aceleración relaciona los cambios de la velocidad con el tiempo en el que se producen, es decir que mide cómo de rápidos son los cambios de velocidad:

Una aceleración grande significa que la velocidad cambia rápidamente. Una aceleración pequeña significa que la velocidad cambia lentamente. Una aceleración cero significa que la velocidad no cambia.

La aceleración "a" puede ser calculada mediante la expresión:

[tex]a=\frac{vfinal - vinicial}{tiempo}[/tex]

En este caso:

a= 1 [tex]\frac{m}{s^{2} }[/tex]vfinal= ?vinicial= 5 [tex]\frac{m}{s}[/tex]tiempo= 10 s

Reemplazando:

[tex]1\frac{m}{s^{2} }=\frac{vfinal - 5\frac{m}{s} }{10 s}[/tex]

Resolviendo se obtiene:

1 [tex]\frac{m}{s^{2} }[/tex] *10 s= vfinal - 5 [tex]\frac{m}{s}[/tex]

10 [tex]\frac{m}{s}[/tex] = vfinal - 5 [tex]\frac{m}{s}[/tex]

10 [tex]\frac{m}{s}[/tex] + 5 [tex]\frac{m}{s}[/tex] = vfinal

15 [tex]\frac{m}{s}[/tex] = vfinal

A los 10 segundos su velocidad será 15 [tex]\frac{m}{s}[/tex]

El peso normal de un estudiante de secundaria es 725 N y el área de los dos zapatos que usa es de 412 cm2 . La presión medida que sus zapatos ejercen en el suelo es

Answers

Answer:

Presión = 175,97 N/m²

Explanation:

Dados los siguientes datos;

Peso del alumno (fuerza) = 725N

Área de zapatos = 412 cm² a metros cuadrados = 412/100 = 4.12 metros

Para encontrar la presión, usaríamos la siguiente fórmula;

Presión = fuerza / área

Presión = 725 / 4.12

Presión = 175,97 N/m²

what is comma please plz me.!!​

Answers

Answer:

A comma.....

Explanation:

Looks like this (,), and can be used if you have run-on sentences.

I hope this helps :)

hi

what's up

wrud

hmm

hmm

a reaction occurs in which carbon combines with sulfur to form carbon disulfide is this a chemical reaction or a nuclear reaction and how do you know

Answers

Answer:

a chemical reaction where electrons mix.

Explanation:

A nuclear reaction is when atomic nuclei combine, forming a new chemical element

A chemical reaction occurs when electrons from the last layer of atoms mix, forming molecules that have the same chemical elements as the reactants.

According to these definitions

           C + 2 S → CS2

in a chemical reaction where electrons mix.

Answer:

This is a chemical reaction, because only the electrons were rearranged.

SCIENCE<3:: will give brainliest! :)

Answers

Answer:

Option two

Explanation:

im smort

Answer:

I think it's B. there is a cold air mass pushing warm air mass up and replacing it over San Francisco

Match the following moves to the correct total distance and displacement of the moves.

A) Move 12 m west and then 8 m east
B) Move 9 m west and then 16 m east
C) Move 10 m east and then 12 m west
D) Move 5 m east and then 12 m east

1) Displacement is 17 m
east; distance is 17 m
2) Displacement is 2 m west; distance is 22 m
3) Displacement is 7 m east; distance is 25 m
4) Displacement is 4 m west; distance is 20 m

Answers

Answer:

A=4

B=3

c=2

D=1

Explanation:

since the person moving in opposite direction so displacement =distance in east/west - distance in west/east

1. A body undergoing Uniform motion covered 12.5km with in 2.8 min. Determine:
A. The speed of the body
B. The time to cover 0.5km
C. The distance covered in 12min

Answers

A Speed is 4.46km/min. 267.6km/h
B. Time take is 0.11 min. 6.7sec
C. Distance is 53.52km. 5352m

An airplane is cruising at a speed of 250 m/s. If the airplanes engines provide a forward force of 19,540 N, calculate the force of the air resistance (friction) that is acting on the plane.

Answers

Answer:

19,540 N

Explanation:

if you have a force at an angle in order to get it with the horizontal you get the Force times cosine the angle and if you want it with the vertical you got the Force times sine the angle

1. What would you need to move a soccer ball?
a. Friction
b. Gravity
c. Force
d. Inertia

Answers

Answer:

Force

Explanation:

It’s force credits to the person above :D

If you are pushing a box toward your friend with a force of 20 N, and your friend is pushing the box toward you with a force of 30 N, what will happen to the box?

Answers

Answer : the box will move backwards with a force 10 N

Explanation :

F1 = 20 N

F2 = 30 N

F = F2 - F1 = 30 - 20 = 10 N

Two swimmers competed in a race. The graph shows how the position of both swimmers

changed over time during the race.



Two swimmers competed in a race. The graph shows how the position of both swimmers


At what rate of speed did Swimmer 1 travel throughout the race?

Answers

Answer:

2m/s

Explanation:

Calculate the slope at any point as the line is linear. i.e. 20/10 = 2/1 m/s

Small pieces of sand hitting the side of a mountain and weathering the rock is an example of what type of weathering?

Answers

Answer: This is MECHANICAL type of weathering.

Explanation:

Weathering is defined as the process by which rocks breakdown into smaller quantities due to different atmospheric and biological activities.

There are different types of weathering which include:

--> MECHANICAL WEATHERING: This type of weathering is also called physical weathering. Here, rocks are being broken down into smaller pieces but the mineral composition of the rock remains the same. This type of weathering can occur in two ways:

• By Ice wedging: this is one of the easiest ways rocks can be broken into smaller pieces. It occurs at the earth polar regions (climate that regularly cycles above and below the freezing point) and in areas of higher elevations such as the mountains. Ice wedging of rocks occurs when water seeps into cracks, it freezes and expands. This results in wedging (splitting) the rocks apart with repeated freezing.

• By Abrasion: this is another form in which mechanical weathering occurs. Abrasion occurs when strong winds carrying pieces of sand sandblast mountain surfaces. Also moving water, gravity, biological activities can cause abrasion of rock surfaces leading to its weathering.

Therefore, small pieces of sand hitting the side of a mountain and weathering the rock is an example of mechanical weathering by abrasion.

A uniform beam is balanced at its midpoint. An object is placed on the beam as shown. Which force will rebalance the beam

Answers

The image of the uniform beam is missing, so i have attached it.

Answer:

Option D: 90N acting downwards, 20cm to the left of the midpoint

Explanation:

Taking moments about the pivot, for the beam to be balanced, the moments to the left of the pivot must be equal to the moments to the right of the pivot.

Thus, it also means that; anti clockwise moment = clockwise moment.

Now, from the image, the moment of the left force about the pivot is an anti clockwise moment = 60 × 30 = 1800 N.cm

Now, for the beam to be rebalanced, we need a clockwise moment to the right of the pivot that is equal to 1800 N.cm.

Thus, the clockwise moment would have to be gotten from a downward force to the right of the pivot.

From the options given, the only downward force to the right of the pivot that produces a moment equal to 1800 N.cm is;

Option D: 90N acting downwards, 20cm to the left of the midpoint

TTC
The TTC subway train in Toronto starts from rest at the Kipling station and accelerates at a
rate of 4.0 m/s for the first 6.0 s. The train then maintains a constant speed for the next
45.0 s.
(a)
(B)
Calculate the train's velocity after 6.0 s have elapsed.
Determine the displacement of the train after 51.0 s of travel.

Answers

I thinks it’s b sorry if I am wrong

Four satellites are in orbit around the Earth. The heights of their four orbits
are identical. The masses of the four satellites are given in the table. For
which satellite is the gravitational pull of Earth the strongest?

A. Satellite A
B. Satellite B
C. Satellite C
D. Satellite D

Answers

The gravitational pull of Earth is stronger in satellite A

our ancestors are our guides?​

Answers

Answer:

yes

Explanation:

we can clearly say that our ancestor are our guide.

Because of they give us different knowledge about evolution of life and etc.

Convert 350.0mL at 740 K to its new volume at standard temperature

Answers

Answer:

129.12 ml

Explanation:

If answer is correct feel free to replay me for explanation.

Newton's Law of inertia is sufficient to cause a planet to orbit the sun.
O True
O False

Answers

False , inertia is the tendency of a object to not change their state. I have no idea how the orbit around the sun got mixed up in there ....

Answer: This is simply false.

Explanation:

Newton's Law of inertia is NOT sufficient to cause a planet to orbit the sun because gravity  already does that.

I also had this question and I got it right.

Hope this helps!! <3

A spaceship captain lands on an unknown planet. Before venturing forth, he needs to find out the acceleration due to gravity on that planet. All he has available to him is some thin light string, a stopwatch, and a small 2.75-kg metal ball (it was a rough landing). So he lets the ball swing from a 1.5-m length of the string, starting at rest, and measures that it takes 1.9 s for it to swing from the place where he released it to the place where it first stops as it reverses direction. What is the acceleration due to gravity on this planet

Answers

Answer:

g = 4,10 m/s

Explanation:

Este es un ejercicio de péndulo simple, donde la velocidad angular esta dada por

          w = [tex]\sqrt{ \frac{g}{L} }[/tex]

la velocidad angular esta relacionada con el periodo

         w =2π/T

sustituimos

         [tex]\frac{2\pi }{T} = \sqrt{ \frac{g}{L} }[/tex]2pi/T = Ra g/L

         T² = [tex]4\pi ^2 \frac{ L}{g}[/tex]

          g = [tex]4\pi ^2 \ \frac{L}{T^2}[/tex]

el periodo es el tiempo de una oscilación completa, osea desde el punto donde se suelta hasta que regresa al mismo punto, en este caso tenemos medio periodo, desde donde se suelta hasta donde se detiene

       T/2 = 1,9

       T = 2  1,9

       T = 3,8 s  

calculemos

        g = 4π²  1,5 /3,8²

        g = 4,10 m/s

Mistakes in a DNA sequence is known as

Answers

Answer:

mistakes are called. mutations. mutations are. changes in the sequence of DNA. mistakes can be made during the DNA replication process but DNA replication process has features that reduce mutations.

Explanation:

hope this helps


Which symbol represents a type of radiation that has the same mass as an
electron and a positive charge?

Answers

Answer:β^+

Explanation: it is beta + , also positron emission radiation

Answer:

0 +1 e or β+

Explanation:

A P E X

answer this plsss
A mobile phone operates at 900 MHz.
What wavelength does it use?

Answers

Answer:

The wavelength = 0.3333 meters at 900 MHz, therefore, = /4 = 0.08333 meters.

Light travels at a speed of equation m/s in air. What is the speed of light in glass, which has an index of refraction of 1.5?

Answers

Answer:

[tex]2\times 10^{8}\ \text{m/s}[/tex]

Explanation:

[tex]n[/tex] = Refractive index of glass = 1.5

[tex]c[/tex] = Speed of light in vacuum = [tex]3\times 10^8\ \text{m/s}[/tex]

Refractive index is given by

[tex]n=\dfrac{c}{v}\\\Rightarrow v=\dfrac{c}{n}\\\Rightarrow v=\dfrac{3\times 10^8}{1.5}\\\Rightarrow v=2\times 10^{8}\ \text{m/s}[/tex]

The speed of light in the glass is [tex]2\times 10^{8}\ \text{m/s}[/tex].

What type of local wind would most likely occur in the image below?
mountain breeze
sea breeze
valley breeze
land breeze

Answers

The correct answer is sea breeze

Answer:

Land breeze.

Explanation:

The breeze that blows from the land toward the sea after sunset. The land cools more quickly than the ocean, cooling the air above it. The warmer air above the water continues to rise, and cooler air from over the land replaces it, creating a breeze.

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