Answer:
-2.5 is the answer to your question
Explain why a clothes iron with a metal base must be connected to the mains by a three-core cable.
The earth connection is because the earth connection(third cable) helps to prevent the casing from turning into a live wire.
What are the three cables?It is normal to find that the cable that is used in the pressing iron has three wires that connect to live, neutral and earth. The earth connection is very important in the pressing iron.
The reason why we ought to have the earth connection is because the earth connection helps to prevent the casing from turning into a live wire.
Learn more about pressing iron:https://brainly.com/question/9664475?
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If the distance between the first and the ninth crests in a string is 320 cm on the way velocity is 8 m/s calculate the periodic time
Áp dụng công thức tính bước sóng nhé
If a truck starts from rest and it has acceleration of 4 m/s for 5 second calculate its final velocity. What will be the distance travelled by the truck during the time interval?
Answer:
20m/s final velocity, 60meters is the distance
Explanation:
since it accelerates 4m/s we can assume every second it goes up by 4 so we do 5×4=20...
while for the distance we have to think about the fact that every second the speed changes (precisely every second adding 4m/s) so in the first second its going to travel 4 meters in the second 8m in the third 12m in the fourth 16m and in the fifth 20m... so we just calculate them for addition and get 60 meters
I will give brainliest
Which option works similarly to an ultrasound scanner?
O A. Echo
O B. Hand lens
O C. Rainbow
O D. Shadow
Answer:
A. an echo works similarly with an ultrasound scanner cos they both refract sound
Explanation:
hope it helps
Answer:
A. Echo
Explanation:
I took the quiz and got it right
10 points and BRAINLIEST? Could someone please provide 10 key facts about electricity? For the most reasonable answer, I'll follow you and rate your answer Excellent and give Brainliest!!!
Answer:
Broadcasting empty threats is unwise
Explanation:
Roosevelt states that a man who boasts without backing himself up puts his position in jeopardy
Please help me! Today's Daily Question is:
What color is the sky when a volcano erupts?
I will give Brainliest to the correct answer, or whoever answers first. Have a great day or night.
Answer:
Red I'm pretty sure
Explanation:
Vocanic ash and sunsets. Volcanic eruptions can inject millions of tonnes of dust and gaseous sulfur dioxide into the stratosphere. ... The dust and aerosol produce vivid sunset and twilight effects like the intense yellow-red horizon and purple-pink glows of the photograph.
The sky is a Dark Black.
Explanation:
The smoke from the volcano fills the sky with black smoke
Which statement best describes the air in Earth's atmosphere?
- a pure substance made of one kind of gas
- a solution of gases that are physically mixed
- a compound made of two or more kinds of gases
- a mixture of two gases that are chemically combined
Explanation:
Please Tell me About this question if you know que is transformer is used in rectifier to step up or step down voltage?
Describe one unique/different food from your country
In this graph (mass vs volume), what does the slope represent? I will mark brainliest
Answer:
Slope y2-y1/x2-x1
m=mass/volume
slope represents density(g/ml)
Explanation:
PLS MARK BRAINLIEST
Slope = Mass/ Volume = Density. The given slope represents Density.
Thus, Density is the mass of a material substance per unit volume. d = M/V, where d is density, M is mass, and V is volume, is the formula for density.
Grams per cubic centimeter are a typical unit of measurement for density. For instance, air weighs 1.2 pounds per cubic metre. In textbooks and manuals, the densities of typical solids, liquids, and gases are stated.
The volume of a body is equal to the mass multiplied by the density (M = Vd), while the volume is equal to the mass divided by the density (V = M/d). Density provides a straightforward way to determine a body's mass from its volume, or vice versa.
Thus, Slope = Mass/ Volume = Density. The given slope represents Density.
Learn more about Density, refer to the link:
https://brainly.com/question/29775886
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What is the efficiency of a ramp if 2,000 joules of energy results in 1.200 joules of work? (1 point)
O 32%
O 80%
60%
0 24%
[tex]\boxed{\sf Efficiency=\dfrac{E}{∆E}\times 100}[/tex]
[tex]\\ \sf\longmapsto Efficiency=\dfrac{1200}{2000}\times 100[/tex]
[tex]\\ \sf\longmapsto Efficiency=\dfrac{3}{5}\times 100[/tex]
[tex]\\ \sf\longmapsto Efficiency=60\%[/tex]
1.) Is it possible for an object to move in a direction that is different from the direction of the net force acting on the object? (an example would be much appreciated).
Answer:
No,unless the force is balanced and the object doesn't move .
calculate the work done by a girl of mass 40 kg when she climbs a stair case of 20 steps each of height 10 cm and acceleration is 10Nkg^-1
Answer:
i think its a 800x² hope you like it
Answer:
8964
Explanation:
465
Conservation of Momentum
No one likes you little trolls please send an actual answer
Hello!
This is an example of an inelastic collision, where the two objects "stick" to each other after their collision. (The Goalkeeper CATCHES the puck).
We can write out the conservation of momentum formula:
m1vi + m2vi = m1vf + m2vf
Let:
m1 = mass of puck
m2 = mass of the goalkeeper
We know that the initial velocity of the goalkeeper is 0, so:
m1vi + m2(0) = m1vf + m2vf
m1vi = m1vf + m2vf
The final velocities will be the same, so:
m1vi = (m1 + m2)vf
Plug in the given values:
(0.16)(40)/ (0.16 + 120) = vf ≈ 0.0533 m/s
Using the equation for momentum:
p = mv
The object with the LARGER mass will have the greater momentum. Thus, the Goalkeeper has the largest momentum as p = mv; a greater mass correlates to a greater momentum since the velocity is the same between the two objects. The puck would have a momentum of p = (.16)(0.0533) = 0.008528 kgm/s, whereas the goalkeeper would have a momentum of
p = (120)(0.0533) = 6.396 kgm/s.
why it is important to have a regular
supervision of the weight and measurement and in the market
What do you call a molecule composed of two atoms of the same element?
Answer:
I believe it's called a diatomic atom
bus slows down uniformly from 21 m/s to 0 m/s in 21 s. How far does it travel before stopping?
Answer:
1 hour = 3,600 seconds
1 km = 1,000 meters
75 km/hour = (75,000/3,600) m/s = 20-5/6 m/s
The average speed of the bus while it slows down is
(1/2)(20-5/6 + 0) = 10-5/12 m/s .
Traveling at an average of 10-5/12 m/s for 21 seconds,
the bus covers
(10-5/12) x (21) = 218.75 meters .
do not own the answer
answer by (AL2006 from brainly)
I NEED THE RIGHT ANSWER ASAP IT NEEDS TO BE 100% ACCURATE NO LINKS !!!
Which statement about vectors is true?
1:Vectors are quantities described by both velocity and acceleration.
2: Vectors are quantities described by both magnitude and direction.
3: Vectors are quantities described by both speed and movement.
4: Vectors are quantities described by both force and gravity.
Answer:
I will answer before the bot in comments
leftover planetesimals that formed inside the frost line are known as
These are known as dwarf planets.
why are protons and electrons attracted to each other
Answer:
electrons have a negative charge, while protons have a positive charge
Explanation:
In science "opposites attract"
identify a woman in sports and give a brief bio on her life and her contribution to the sporting discipline that she is notably involved in.
Answer:
Explanation:
These ground breaking women have achieved something no woman has achieved before. 1938: Babe Zaharias, the first female to play on the PGA Tour in the Los Angeles Open. She shot 81-84 and missed the cut.
4. What is the purpose of the corneal reflex?
can someone help please
Hi there!
We know that:
Potential energy = mgh, where:
m = mass
g = acceleration due to gravity
h = height
We know that ΔPE = mgΔh = 1.47 kJ, so:
1.47kJ = mgΔh
Remember to convert kJ to J for simplicity: (1 kJ = 1000J)
1470J = mgΔh
Rearrange to solve for Δh:
1470/mg = Δh
1470/(60 · 9.8) = 2.5m
An atom contains 15 electrons. How many protons are present in the atom?
Answer:
15 protons.
Explanation:
The atomic number is the number of electrons as well as the number of protons whereas, the atomic mass is the number of neutrons and number of protons.
Answer:
15 protons
Explanation:
because the atom's electrons is always the same number as the atom's protons
hope it helps
HAPPY HALLOWEEN
Have a nice day
A tennis ball is tossed upward with a speed of 3.0 m/s. We can ignore air resistance.
What is the velocity of the ball 0.40 s after the toss?
Answer: Hello, The velocity of the ball is 0.92 m/s in the downward direction (-0.92 m/s).
Explanation: The equation for the velocity of an object thrown upward is the following:
v = v0 + g · t
Where:
v = velocity of the ball.
v0 = initial velocity.
g = acceleration due to gravity (-9.8 m/s² considering the upward direction as positive).
t = time.
To find the velocity of the ball at t = 0.40 s, we have to replace "t" by 0.40 s in the equation:
v = v0 + g · t
v = 3.0 m/s - 9.8 m/s² · 0.40 s
v = -0.92 m/s
The velocity of the ball is 0.92 m/s in the downward direction (-0.92 m/s).
Hope That Helps
Newtons and Coulombs Laws QC
(Look to the bottom for answers 100% correct)
1. Which law gives the force between two objects that is related to their mass and distance?
A. Newton's second law of motion
B. Kepler's law
C. Newton's law of gravitation
D. Coulomb's law
2. What is the property that allows a positive proton and a negative electron to feel an attraction between each other?
A. Mass
B. Weight
C. Charge
D. Spin
3. In which case would there be an electrostatic force between two objects?
A. Two positively charged objects
B. A negatively charged object and a neutral object
C. A positively charged object and a neutral charged objects
D. Two neutral objects
4. Which statement is correct about electrostatic force?
A. It can have a positive or negative value
B. It is only observed between two electrons
C. It depends on the mass if the charges
D. It is independent of the distance between charges
5. In the simulation, two charges are both set to +4 uC. Then one of the charges is charged to -4 uC. Which statement describes the situation?
A. The electrostatic force is originally repulsive and stays repulsive.
B. The electrostatic force is originally attractive and stays attractive.
C. The electrostatic force changes from attractive to repulsive.
D. The electrostatic force changes from repulsive to attractive.
Answers:
1. C
2. C
3. A
4. A
5. D
BE SURE TO CHECK THE ORDER OF YOUR ANSWER CHOICES BECAUSE THEY CAN CHANGE.
100% is guaranteed
1c 2c 3a 4a 5d
Explanation:
I just know.
ur welcome.
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I need help with some physics stuff HELP
Answer:
You just double the number of boxes it goes higher. Then triple the number for the second question. But don't change the time.
the energy per unit volume in an electromagnetic wave is
Answer: sum of the electric field energy density and magnetic field energy density.
Explanation:
The total energy stored in an electromagnetic wave is equal to the sum of energy stored in the electric and magnetic fields. In that case, the energy stored per unit volume, or energy density of the electromagnetic wave, is the sum of the electric field energy density and magnetic field energy density.
The first one is wrong
Answer: goin at a constant rate
Explanation: goes through 0,0
What is the weight force of a 10 kg object on the sun? (The sun's acceleration due to gravity is 275 m/s^2)?
Answer:
f=mass × acceleration
f=10×275
f=2750N
Explanation:
PLS MARK BRAINLIEST
A car starts from rest and retains the acceleration of 4m/s² in 20 second. calculate its final velocity.
step by step
Answer:
80m/s
Explanation:
[tex](acceleration)= \frac{(change \: in \: velocity)}{(change \: in \: time)}[/tex]
4 = v/20
V = 4 * 20
V = 80( final velocity)