Q2: (2 marks) (show your work)
What is the net force on the box shown below?
30 N
60 N
20 N
Answers
Answer:
Net force = the difference between the forces of two directions
Net force= 60N-(30N+20N)
=60-50
Therefore Net force = 10N
Related Questions
3. A beam of light passes through the air (n=1.00) and enters a diamond (n=2.42) at an angle of incidence of 40 degrees. Use Snell’s Law to find the angle of refraction in the diamond. If the diamond is placed in a tank of water (n=1.33) and the beam of light enters the diamond at the same angle of incidence, what would be the new angle of refraction? Show all work.
Answers
Answer:
(a) θ₂ = 15.4°
(b) θ₂ = 28.9°
Explanation:
Snell's Law can be written as follows:
[tex]n_1Sin\theta_1 = n_2Sin\theta_2[/tex]
where,
n₁ = incident index
n₂ = refracted index
θ₁ = Angle of incidence
θ₂ = Angle of refraction
(a)
n₁ = incident index = 1
n₂ = refracted index = 2.42
θ₁ = Angle of incidence = 40°
θ₂ = Angle of refraction = ?
Therefore,
[tex](1)(Sin\ 40^o) = (2.42)Sin\theta_2\\\theta_{2} = Sin^{-1}(0.26561)[/tex]
θ₂ = 15.4°
(b)
n₁ = incident index = 1
n₂ = refracted index = 1.33
θ₁ = Angle of incidence = 40°
θ₂ = Angle of refraction = ?
Therefore,
[tex](1)(Sin\ 40^o) = (1.33)Sin\theta_2\\\theta_{2} = Sin^{-1}(0.4832)[/tex]
θ₂ = 28.9°
when he drove home his car broke down it wasnt due to a problem with the wheels it was the?
Answers
what are the five properties of light
Answers
Answer: I believe it's dispersion, diffraction, reflection of light, refraction of light, polarization of light and interference of light.
Explanation:
One of the ways that scientists determine the distance between Earth and other objects in space is to send light waves toward an object and measure how long it takes for the waves to bounce back. If a scientist sends light waves to four different objects in space, which of the following will take the longest to bounce the wave back to Earth?
a star in the Milky Way Galaxy
a star in the Andromeda Galaxy
a planet in Earth's Solar System
a planet in another star system within the Milky Way Galaxy
Answers
Answer:
a star in andromeda
Explanation:
all of the other objects are in the milkyway (where we are) and the andromeda galaxy is 2 million light years away from us
Using your strategy to overcome your obstacle.
Finally, now that you have both your obstacle and your success strategy in mind, take some time to write how you would actually use this strategy to help you overcome your obstacle. Be specific! The more specific you are, the more likely you will be to actually implement this success strategy. Write how you would use this strategy in the box below:
Answers
I would use this strategy in the following ways:
Observing the resources around me and finding ways to cope with the situation.Observing my environment or what is there around me that can help me Asking for help from othersThinking outside the boxWhat is strategy?Strategy is described as a general plan to achieve one or more long-term or overall goals under conditions of uncertainty.
We have three levels of strategy and they include:
Corporate level strategyBusiness unit level strategyMarket level strategyBy Observing my environment or what is there around me that can help me, it will help me overcome any obstacle that may come my way.
Learn more about levels of strategy at:
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how can we solve the problem for galaxies?
Answers
Explanation:
By keeping the galaxies safe and not launching stuff into space hurting planets and other universes out there in the entire galaxy
lf a dropped hammer's velocity increases from 0.Omis to 15.0 m/s in 4.04s
while on the moon, what is the acceleration due to the gravitational force
on the surface of the moon (m/s2)?
Answers
Answer: The acceleration due to gravity on the surface of the Moon is approximately 1.625 m/s2, about 16.6% that on Earth's surface or 0.166 ɡ.
Heres your answer.
300 grams of ethanol is heated with 14640 Joules of energy to reach a final temperature of 30 °C. What was the initial temperature of the ethanol? The specific heat of ethanol is 2.44 J/g·°C.
Answers
Answer:
10 °C
Explanation:
Applying
q = cm(t₂-t₁)............... Equation 2
Where q = heat energy, c = specific heat of ethanol, m = mass of ethanol, t₁ = initial temperature, t₂ = Final temperature.
Given: c = 2.44 J/g.°C, m = 300 g, q = 14640 J, t₂ = 30°C
Substitute into equation 2 and solve for t₁
14640 = 2.44×300(30-t₁)
14640 = 732(30-t₁)
732(30-t₁) = 14640
(30-t₁) = 14640/732
(30-t₁) = 20
t₁ = 30-20
t₁ = 10 °C
Answer:
30°C
Explanation:
i just did it
help me plsss! no links
Answers
Answer:
a is the answer to the question
what is the microcoulomb if the coulomb is 1,00
Answers
Answer:
Coulomb = 100
Micro coulomb = 100 × 10^-6 = 10^-4 coulomb
What is a magnetic disc that provides long-term storage for programs and data?
Answers
Answer:
The correct answer is: A HARD DISK
Explanation:
Magnetic Disc stores data of different types and formats that can always be edited or erased at any time. An example of a Magnetic Disc is a Hard Disk.
A hard disk is a type of magnetic storage device inside a computer that store data magnetically usually for the long-term and it could store a large volume of data, though that depends on the size, because it comes in various size. However, it generally allows stored data to be retrieved easily.
the process of mitosis makes body cells which are also called_______ cells.
NEED DONE ASAP!!!!!
Answers
Answer:
daughters cells
Explanation:
when people refer to “cell division,” they mean mitosis, the process of making new body cells. Meiosis is the type of cell division that creates egg and sperm cells. Mitosis is a type of cell division in which one cell (the mother) divides to produce two new cells (the daughters) that are genetically identical to itself.
The standard cell potential (E°cell) for the reaction below is +0.63 V. The cell potential for this reaction is __________V when the concentration of Zn2+ = 1.0 M and the
concentration of Pb2+ = 2.0 x 10-4 M.
Pb2+(aq) + Zn(s) ---> Zn2+(aq) + Pb(s)
Answers
Answer:
0.52 V
Explanation:
From Nernst equation;
Ecell =E°cell - 0.0592/n log Q
E°cell = +0.63 V
[Zn2+] =1.0 M
[Pb2+] = 2.0 x 10-4 M
n = 2
Ecell = 0.63 - 0.0592/2 log[1.0/2.0 x 10-4]
Ecell = 0.63 - 0.11
Ecell = 0.52 V
If an object that was held steady (0 speed) and then dropped, how many meters would it fall in one second?
Answers
Answer:
h = 4.905 m
Explanation:
In order to find the distance covered by the object in 1 second, we can use the second equation of motion:
[tex]h = v_i t + \frac{1}{2}gt^2\\[/tex]
where,
h = distance covered = ?
vi = initial speed = 0 m/s
g = acceleration due to gravity = 9.81 m/s²
t = time = 1 s
Therefore,
[tex]h = (0\ m/s)(1\ s)+\frac{1}{2}(9.81\ m/s^2)(1\ s)^2\\\\[/tex]
h = 4.905 m
the nearest star to our planet other than the sun , is 4.4 light year away.One light-year is the distance light travels in a year.
* HOW LONG DOES IT TAKE FOR TO REACH US?
* SUGGEST WHY LIGHT-YEAR IS USED AS THE UNIT FOR MEASURING THE DISTANCE BETWEEN DISTANT STARS AND OUR PLANET, RATHER THAN THE UNIT 'KILOMETER,
Answers
Answer:
1606
The main reason for using light years, however, is because the distances we deal with in space are immense. If we stick to miles or kilometers we quickly run into unwieldy numbers just measuring the distance to the nearest star: a dim red dwarf called Proxima Centauri that sits a mere 24,000,000,000,000 miles away!
Explanation:
A mosquito's wings create a buzzing noise with a frequency of 1050 Hz. If you hear a mosquito buzzing with a frequency of 1034 Hz, at what velocity is the mosquito travelling with respect to you (in m/s)?
NO LINKS
Answers
Answer:
5.26 m/s
Explanation:
Given that,
The frequency of mosquito's wings, f = 1050 Hz
The observed frequency = 1034 Hz
We need to find the velocity of the mosquito travelling with respect to you. We have a formula to find it such that,
[tex]v=\dfrac{v}{\dfrac{f'}{f}}-v[/tex]
Where
v is the speed of sound
So,
[tex]v=\dfrac{340}{\dfrac{1034}{1050}}-340\\\\v=5.26\ m/s[/tex]
So, the required velocity is equal to 5.26 m/s/
Which of the following electrical components protects your home from excessive flow of current in the electrical wires?
- resistor
- fuse
- transistor
- capacitor
Answers
Answer: the correct option is FUSE.
Explanation:
Current Electricity consists of fast moving negatively charged electrons which travels in materials that allows the flow of electrons called conductors. In the generation of Electricity for distribution, two types of currents are being generated. It's either an Alternating current ( A.C) or a Direct Current ( D.C.). An A.C. consists of electric charges that constantly changes its position and direction of flow of voltage and current while D.C. the electric charge flow in one direction. For the safety of devices of the end users of the electric current ( either A.C. or D.C) generated, a FUSE is usually used to protect the appliances from too much flow of electric current.
A fuse is therefore defined as a safety device that protects appliances( such as televisions, refrigerators, computers) from current overload or voltage fluctuations which can cause damaging effects. It is made up of thin strip or strand of metallic wire with noncombustible material. These devices are usually connected in series with the components to be protected from current overload. This is so because, when there is high or excessive current, the fuse melts and it opens the circuit and disconnects it from the power supply. Some of the types of fuse includes A.C fuse and D.C. fuse.
Imangine a car moving down a street. From which reference point would the street appear to be moving?
A: From the sky
B:From the street
C:From the car
D: From the sidewalk
Answers
When you rub your feet on a carpet and then go to touch a door knob you may receive a shock! This is the result of millions of....moving in a
matter of seconds.
Answers
Answer:
I need points cri
Explanation:
Answer:
Electrons
Source:
https://kidshealth.org/en/kids/electric-shock.html#:~:text=When%20you%20touch%20a%20doorknob,quick%20movement%20of%20these%20electrons.
What is the name of the process where rocks are being broken down into small grains of sediment or soil?
A) Weathering
B) Erosion
C) Deposition
D) Uplifting
Answers
Answer:
a. weathering
Explanation:
weathering is the breakdown of rocks into sediments and soil
Explain how a manufacturing business might participate in the ""resource disposal"" aspect of resource management.
Answers
Answer:
Resource disposal or waste disposal is a crucial aspect of resource management.
Businesses in the manufacturing sector must develop a model of operations that allows an endless loop of internal recycling of waste and or processing waste resources into commercial resources.
A good example would be when an abattoir processes the internal organs of cows and goats with some waste gotten from rice mill into can food for dogs and canines. Waste from this secondary process can either be converted into organic manure to be sold to farmers or processed further for consumption at carnivorous fish farms.
Cheers
Please help me with a speech.The topic of my speech is Passion.
Answers
Answer:
Explanation:
Passion
For me, standing on the summit of Mt Everest was the result of following a process. The process of mountaineering. I love mountaineering. I am passionate about it. I love the months of planning for an expedition, the months of sweating and training to prepare my body physically. The meticulous preparation of my equipment. Most of all I love the huge mental challenge I have to overcome before each climb to confront my own fear. All these reasons are why I climb, they are why I climbed Mt Everest and that is why I continue to climb.
Passion is an enormously powerful force. It gives us the strength to get through hard times and setbacks. It gives us strength to overcome our fears, to ignore what other people think of us, to be disciplined and make sacrifices in pursuit of our dreams. Passionate people do not want to take shortcuts – they consider that ‘learning the process’ is an important part of the journey.
In mountaineering it’s easy to spot those who are not passionate about the process. They want to stand on top of the mountain but they are not really interested in the process of climbing the mountain. I feel for these people. Success without hard work is a hollow, empty feeling. They never last long in the sport.
Just as in life, successful mountaineers are the ones who are passionate. They are not there just to stand on the summit. Their passion gives them the energy to work the hardest, fight the longest, and in the words of Winston Churchill “never, never. never give-up”.
hey need help -v-
Energy that is stored in an object because of its temperature is called ___________________.
A. thermal energy
B. temperature
C. molecular movement
D. heat transfer
the subject is science sense i cant put it on here
Answers
Answer:
c. molecular movement
Explanation:
.....
Use the drop-down menu to select the education or qualification best demonstrated in each example.
Maritza is friendly and polite to people who enter the store where she works.
✔ customer-service skills
Darren stays calm and does not get frustrated when dealing with an angry customer.
✔ patience
Yelena is able to lift heavy items on high shelves.
✔ physical strength
Answers
Maritza is friendly and polite to people who enter the store where she works. She has customer-service skills.
What is the qualification?Qualification is a special skill or experience that makes someone suitable for a certain job. It shows the level of education. Everyone gets a job according to their qualification. It is formal documentation someone gets after completing the education.
Darren stays calm and does not get frustrated when dealing with an angry customer. He has patience.Yelena is able to lift heavy items on high shelves. She has physical strength.Maritza is friendly and polite to people who enter the store where she works. She has customer-service skills.Thus, these are the qualification or skills of Maritza, Darren, and Yelena.
Learn more about qualifications, here:
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body composition is?
Answers
Answer: body composition is the proportion of fat and non fat mass in your body.
Explanation:
Answer:
Body composition is the percentage of a body's weight
Explanation:
Body composition is the body's amount of fat relative to fat-free mass. Individuals with optimal body composition are typically healthier, move more easily and efficiently, and generally feel better.
4
12. The term, bullet, is often incorrectly applied to the:
a. primer, which includes primer powder, gunpowder, the bullet, and the
casing material that holds them all together.
b. cartridge, which includes primer powder, gunpowder, the bullet, and the
casing material that holds them all together.
c. anvil, which includes primer powder, gunpowder, the bullet, and the casing
material that holds them all together.
d. headstamp, which includes primer powder, gunpowder, the bullet, and the
casing material that holds them all together.
Answers
Answer:
B. Cartridge, which includes primer powder, gunpowder, the bullet, and the
casing material that holds them all together.
Explanation:
It is right trust me.
The function of a microscope is most similar to the function of a.............
Answers
Answer:
Magnifying glass and a Petri dish.
Explanation:
The density of a material is 22.5 g/cm^3.Express this in SI units.
Answers
Answer:
22500kg/m³
Explanation:
SI unit is kg/m³
1g/cm³=1000kg/m³
22.5g/cm³=?
22.5 * 1000
=22500kg/m³
HELP PLEASE (ramadan mubarak)
Redox reactions include which types of reactions?
A.
Acid-base, decomposition, double-replacement, synthesis
B.
Double-replacement, combustion, synthesis, decomposition
C.
Single-replacement, synthesis, decomposition, combustion
D.
Single-replacement, double-replacement, acid-base, synthesis
Answers
Answer:
C
Explanation:
five main types of redox reactions: combination, decomposition, displacement, combustion, and disproportion.
synthesis is kinda the same as combination
How can you cause a substance to turn from a solid to a liquid or from a liquid to a gas? Help
Answers
Answer:
When the temperature increases
Explanation:
