Explanation:
a) P = IV
2000 W = I (230 V)
I = 8.7 A
b) The fuse must be rated for a higher current than the kettle, so use the 13A fuse.
c) Double insulation means there are two layers of insulation, insuring that the wires cannot touch the outer casing of the kettle and protecting the user from electrical shock.
d) V = IR
230 V = (8.7 A) R
R = 26.5 Ω
Atom A has an atomic number of 19 and a mass number of 40. Atom B has an atomic number of 20 and a mass number of 40. Which of these is an accurate statement?
A) Atom A has more protons than Atom B.
B) Atom A has one less proton and one more neutron than Atom B.
C) Atom A has an extra nucleon compared to Atom B.
D) Atom A has one more proton and one more electron than Atom B
Answer:
B
Explanation:
Convert 60 miles/hour to m/s (1.6km = 1mile; 1000m = 1km)
60 miles / hr
= 60 * 1.6 * 1000 m / 60 * 60 s
= 96000 m / 3600 s
= 26.67 m / s
A plane is landing. It started at 400m/s and ended up at 50m/s after 30 seconds. What is it's acceleration?
{middle school}
Give u = start velocity
v = end velocity
v = u + at
50 = 400 + a*30
30a = -350
a = -116.67 m/[tex]s^{2}[/tex]
**Why the accecleration is negative number**
Because displacement, velocity, and acceleration are VECTOR QUANTITIES.
Vector Quantity must have direction.
Which best describes what occurs when an object takes in a wave as the wave hits it? O transmission O absorption O reflection O refraction
Answer:
Hello there hope you are having a great day! Your answer would most likely be B. Absorption
Explanation:
Absorption is when a wave comes into contact with a medium and causes the medium's molecules to vibrate and move. This vibration absorbs or takes some of the energy away from the wave and less of the energy is reflected. I hope this helps have a blessed day!
When an object takes in a wave as the wave hits it, then absorption occurs. The correct option is B.
What happens when a wave strikes an object?When a wave strikes an object, it can interact with the object in a variety of ways depending on the properties of the wave and the object.
One possibility is that the wave will be reflected by the object, bouncing back in the opposite direction. The amount of reflection that occurs will depend on the angle of incidence, the angle at which the wave strikes the object, and the properties of the object's surface. For example, a smooth, flat surface will reflect more of the wave than a rough, irregular surface.
Another possibility is that the wave will be absorbed by the object, causing the object to vibrate or heat up. The amount of absorption that occurs will depend on the frequency and intensity of the wave, as well as the material properties of the object.
Finally, in some cases, the wave may pass through the object, either partially or completely. This will depend on the material properties of both the wave and the object, as well as the wavelength and intensity of the wave.
The specific outcome of a wave striking an object will depend on a number of factors, including the type of wave, the properties of the object, and the angle and intensity of the wave.
Here in this question,
Absorption occurs when the energy of the wave is transferred to the object, causing it to vibrate or heat up. The amount of absorption that occurs depends on the properties of the wave and the object. For example, a soft, spongy material will absorb more of the wave than a hard, rigid material.
Therefore, When an object takes in a wave as the wave hits it, the best description for what occurs is absorption.
To learn more about wave click:
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Which type of graph is best for analyzing quantitative dependent and independent variables?
a.
line graph
b.
pie graph
c.
bar graph
d.
surface graph
Answer:
line graph
Explanation:
on edge
1) A police officer is sitting on the side of the road with his lights off. You fly by because you're in a rush to get to school on time doing 50mph in a school zone. The police officer is able to get his car started 2 seconds later and accelerate at 5.5m/s. How long will it take the police officer to catch your car (assume you don't slow down because you're very studious)?
Answer:
right away because you should never speed
The table represents the speed of a car in a northern direction over several seconds. Column 1 would be on the x-axis, and Column 2 would be on the y-axis. Which best lists the titles of each column?
Column 1 should be titled “Time,” and Column 2 should be titled “Velocity.”
Column 1 should be titled “Velocity,” and Column 2 should be titled “Time.”
Column 1 should be titled “Time,” and Column 2 should be titled “Acceleration.” Column 1 should be titled “Acceleration,” and Column 2 should be titled “Time.”
Answer:
the correct answer is A
Answer:
Column 1 should be titled “Time,” and Column 2 should be titled “Velocity.”
Explanation:
Which process is an example of a physical change?
burning
rusting
flattening
decomposing
Flattening is a example of a physical change.
Hope this helps! :D
True or False. If a desk is pushed at a
constant speed across a horizontal floor,
the force of friction must be equal in
magnitude and opposite in direction to
the pushing force on the desk.
True
False
Answer:
it's true
Explanation:
k now to me because I am not good at science
A baseball is thrown at a speed of 25 m/s and travels a distance of 100 m. How
far did it go?
You just said that it "... travels a distance of 100 m".
I will give brainlyist
PLZ HURRY!!!!!!!
Which of the following statements is true?
Heat can travel through a vacuum.
Heat has shorter wavelengths than visible light.
:)
∫·ω·∫
Answer:
I honestly think both of them are true
Answer:
Heat has shorter wavelengths than visible light.
Explanation:
(I had the same question)
I looked up the first one and it was wrong, and the missing options are incorrect. So It would not be all of the above. So, using process of elimination, "Heat has shorter wavelengths than visible light" is correct.
I PROMISE this is correct
A car is accelerated from 40 m/s to 48 m/s in 6.5 seconds. What is the magnitude of the car’s
average acceleration during this period?
Answer:
Explanation:
AVerage acceleration is the cjange in velocity with time
a = v-u/t
v is the final velocity = 48m/s
u is the initial velocity = 40m/s
t is the time = 6.5s
a = 48-40/6.5
a = 8/6.5
a = 1.23m/s²
Hence the magnitude of the car’s average acceleration during this period is 1.23m/s²
A 6.0 MeV alpha particle beam of cross section 5 cm2 is completely stopped in an ionization chamber producing a saturation current of 0.08 nA. What is the deBroglie wavelength of the alpha particle? If the energy necessary to create an ion-electron pair is 33 eV/ip, calculate the fluence rate?
Answer:
[tex]v=6.0MeV\\h=6.626\cdot10^{-34}\\dq=33\\[/tex]
Solution
[tex]m_\alpha =6.64\cdot 10^{-27}\\\lambda=\frac{h}{p}\\p=\sqrt{2m\cdot V}\\\lambda=\frac{6.628 \cdot10^{-34}}{\sqrt{2(6.64\cdot10^{-27})(6\cdot10^6)}}\\\\\lambda =2.35\cdot10^{-34}\\Fluence Rate =\frac{d(N)}{d(t)\cdot d(S)}=\frac{d(N)\cdot d(q)}{d(q)\cdot d(t)\cdot d(S)}=\frac{d(N)}{d(q)}\frac{V} {\cdot d(S)}\\\\\=\frac{6\cdot 10^6}{33} \cdot\frac{0.08\cdot10^{-9}}{4\cdot\pi\cdot25\cdot10^{-4}}\\\\=0.000463\\E_p=4.63\cdot10^{-4}\\[/tex]
[tex]=\frac{6*10^6\cdot 0.08*10^{-9}}{33\cdot4\pi\cdot 25*10^-4} \\\\E_P=4.63*10^{-4}[/tex]
Explanation:
First enlist all the variables
then solve using calculator
help
Jerry pushes against a solid brick wall as hard as he can, with a force of 500 N. How much work does he do on the wall?
Explanation:
work = 0
Work is zero because it remains in its place x=0
Fossil fuels has been used more in the existing world. Why?
Answer:
fossil fuels are being used more because fossil fuels are of great importance because they can burn to produce a significant amount of energy per unit mass the use of coal as a fuel prefates recorded history.
Explanation:
Hope this helps! :)
What is a small, rocky object that orbits the Sun and is usually found in a belt between Mars and Jupiter? asteroid comet meteor meteorite
Answer:
Asteroid
Explanation: did the test
Answer:
A. Asteroid
Explanation:
edge2020
A motorcyclist is riding along a mountain trail that runs parallel to a road below. In fact the trail is 6 meters above the road. The motorcyclist then notices a flat bed truck directly below moving at the same speed and decides to drive off the trail, without changing speed. Fortunately, the motorcycle safely lands on the flatbed of the truck. What would the outcome have been if the trail was 12 meters above the road, but all other parameters remain the same?
The complete question reads:
A motorcyclist is riding along a mountain trail that runs parallel to a road below. In fact, the trail is 6 meters above the road. The motorcyclist then notices a flatbed truck directly below moving at the same speed and decides to drive off the trail, without changing speed. Fortunately, the motorcycle safely lands on the flatbed of the truck. What would the outcome have been if the trail was 12 meters above the road, but all other parameters remain the same?
a) The motorcycle would land slightly behind the truck.
b) The motorcycle would land in front of the truck.
c) The motorcycle would land on the flatbed of the truck as before.
d) The motorcycle would land several meters behind the truck
Answer:
c) The motorcycle would land on the flatbed of the truck as before.
Explanation:
Note that if the trail was 12 meters above the road, but all other parameters remain the same, it simply means that other parameters like the speed of both the motorcyclist and the flatbed truck are the same.
Also, remember we are told that the mountain trail runs parallel to the road below, thus, there is a greater likelihood that the motorcyclist who has a higher height (to his advantage) could land on the flatbed of the truck.
Which of the following would be an example of a vector? *
An object with a mass of 15 kg
An car moving at 30 m/s
A person running 5 m/s north
A spring with 16 J of energy
Answer:
A person running 5m/s north
calculate the speed of a bowling ball that travels 4 meters in 2 seconds
Answer:
2 m/s
Explanation:
Just divide the distance and time. 4/2= 2 m/s
Air pollutants often cause irritation in the _____
system.
PLEASE HELP :/
george walks to a friend's house. he walks 750 meters north, then realizes he walked too far he turns and walks 250 meters south. the entire walk takes him 50 seconds whats his distance and displacement?
As U asked this question twice sry not twice 4 times.. I have been answered the question..Just look there..
TqJerome is learning how the model of the atom has changed over time as new evidence was gathered. He has images of four models of the atom, but they are not in the correct order.
An image at left labeled W with overlapping red and blue balls in the center with a circular fuzzy green cloud outside them. An image at center left labeled X with a purple ball in the center surrounded by overlapping concentric black ovals, each with a small green ball on each of the 6 ovals. An image at center right labeled Y with a large black cross in a purple circle with a black line around the purple, with 10 small green balls dispersed within the purple circle. An image at right labeled Z with a purple center outlined in black with two concentric black circles around the center, the inner circle having 2 small green balls on it and the outer circle having 8 small green balls on it.
In what order should Jerome put these models to show the development from the earliest model of the atom to the most recent one?
Y, X, Z, W
Y, Z, W, X
W, Z, X, Y
W, Y, Z, X
Answer:
Y, X, Z, W
Explanation:
You know W is the most recent because it features the nucleus in the middle and the electron cloud which was shown in models after the others.
Answer:
the answer is A. Y, X, Z, W
Explanation:
Which statement is most likely correct?
A physical change occurred, so if Cash heats it, the white solid will dissolve to form the original mixture of clear liquids.
A physical change occurred, so even if Cash heats it, the white solid will remain.
A chemical change occurred, so if Cash heats it, the white solid will dissolve to form the original mixture of clear liquids.
A chemical change occurred, so even if Cash heats it, the white solid will remain.
Answer:
It is D my beautiful children <3
Tiana jogs 1.5 km along a straight path and then turns and jogs 2.4 km in the opposite direction. She then turns back and jogs 0.7 km in the original direction. Let Tiana's original direction be the positive direction. What are the displacement and distance she jogged?
Answer:
Distance: 4.6km Displacement= -0.2km
Explanation:
Total distance: 1.5+2.4+0.7= 4.6 km
Displacement: 1.5-2.4+0.7= -0.2km
The displacement may also be 0.2km, it just depends on if it wants it negative or not.
Tiana displacement is 0.2 km in the opposite direction, while her distance covered is 4.6 km
Given that Tiana's original direction be the positive direction.
Displacement is a vector quantity. That is, we will consider both the magnitude and direction.
As Tiana jogs 1.5 km along a straight path and then turns and jogs 2.4 km in the opposite direction, Her displacement = 1.5 - 2.4
As She then turns back and jogs 0.7 km in the original direction,
Displacement = 1.5 - 2.4 + 0.7
Displacement = - 0.2 km ( that is, in the opposite direction.)
Distance is a scalar quantity. That is, we will only consider the magnitude.
Tiana total distance = 1.5 + 2.4 + 0.7
Total distance = 4.6 km
Therefore, her displacement is 0.2 km in the opposite direction, while her distance covered is 4.6 km
Learn more here : https://brainly.com/question/18158577
Find the volume of a box that is 122 cm long, 51 cm wide and 13 cm high.
V= ________cm³
Answer:
80,886 cm^3
Explanation:
v= lwh (also known as length × width × height)
v = 122cm × 51cm × 13cm
v = 80,886 cm^3
HELPPPPPPP
What did a study by Strayer and Johnston (2001) regarding the effects of attention on driving conclude?
A.
Attention is not affected as long as one is using a hands-free phone.
B.
Driving and talking with friends in the car increases the chance of an accident.
C.
Driving and listening to the radio increases the chance of missing traffic signals.
D.
Driving and talking on any type of cell phone increases the chance of missing traffic signals.
Answer:
D.
Driving and talking on any type of cell phone increases the chance of missing traffic signals.
Explanation:
correct on edge2021
Answer:
the answer is d thank me later
Explanation:
A train travels with a constant speed of 20.0m/s for 7.00s. Determine all
unknowns and answer the following question(s).
What is the magnitude of the train's acceleration?
Answer:
acceleration is zero m/s²
Explanation:
It is given that the train travels at constant speed (i.e speed does not change)
If speed does not change, then the train is neither accelerating or decelerating (i.e acceleration is zero)
how do the dancer move while dancing
Answer:
The brain is controlling the movement and it’s called the nervous system
Explanation:
I took the test
concave mirror ______the rays of light
Answer: A concave mirror focuses rays of light
Explanation:
PLZZ ANSWER THE QUESTION
