Answer:
a) 7.65 m
b) 14.71s
C) 15.43 m/s
Explanation:
a) s = ut + 0.5at²
s= ?
u = 0
t = 3s
a = 1.7 m/s²
s = 0 + 0.5 × 1.7 × 3²
s = 7.65 m
b) v = u + at
v = 25m/s
u = 0 m/s
a = 1.7 m/s ²
t = ?
v=at
t = v / a
t = 25 / 1.7
t = 14.71s
c) v² = u² + 2as
s = 70m
a = 1.7m/s²
u = 0 m/s
v = ?
v² = 2as
v = √238
v = 15.43 m/s
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.
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.
How can you cause a substance to turn from a solid to a liquid or from a liquid to a gas? Help
Answer:
When the temperature increases
Explanation:
Calculate the pressure at the middle of a glass jar,40cm tall and filled with Liquid A of density 9000kg/m3
Answer:
P = 17658 Pa = 17.658 KPa
Explanation:
The pressure applied by a liquid at a given depth is given by the following formula:
[tex]P = \rho gh\\[/tex]
where,
P = Pressure = ?
ρ = density = 9000 kg/m³
g = acceleration due to gravity = 9.81 m/s²
h = depth = 40 cm/2 = 20 cm = 0.2 m
Therefore,
[tex]P = (9000\ kg/m^3)(9.81\ m/s^2)(0.2\ m)\\\\[/tex]
P = 17658 Pa = 17.658 KPa
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.
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°
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
Answer:
a. weathering
Explanation:
weathering is the breakdown of rocks into sediments and soil
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
What is the formula for calculating tension
Answer:
In other words, Tension (Ft) = Force of gravity (Fg) = m × g. Assuming a 10 kg weight, then, the tension force is 10 kg × 9.8 m/s2 = 98 Newtons.
If an object that was held steady (0 speed) and then dropped, how many meters would it fall in one second?
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
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.
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.
body composition is?
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.
what are the five properties of light
Answer: I believe it's dispersion, diffraction, reflection of light, refraction of light, polarization of light and interference of light.
Explanation:
magnet attracts nails but not copper vessels
help me plsss! no links
Answer:
a is the answer to the question
how can we solve the problem for galaxies?
Explanation:
By keeping the galaxies safe and not launching stuff into space hurting planets and other universes out there in the entire galaxy
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
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/
if mechanical advantage and velocity ratio of a machine are equal then the simple machine is called what
Answer:
hbyjhtcgfcyh
Explanation:
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)
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
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
Answer:
C
Explanation:
five main types of redox reactions: combination, decomposition, displacement, combustion, and disproportion.
synthesis is kinda the same as combination
Which of the following electrical components protects your home from excessive flow of current in the electrical wires?
- resistor
- fuse
- transistor
- capacitor
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.
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
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
Help pls and thank you PLEASE NO LINKS
Answer: mutation
explanation: no other species of its kind will have this mutation
Answer:
Mutation
Explanation:
When a cracker or bread dissolves in your mouth, is that a physical or chemical change?
Answer:
Chemical change.
Explanation:
The saliva or salivary amylase is a bio-catalyst...it causes chemical change during the dissolving process. Also, once the food is dissolved it can't be brought back to it's original state.
Can someone please help me with science.
Answer:
I think it is D or A
Explanation:
I have not done this in a long time, so sorry if wrong.
as the change in speed at the boundary of two materials is greater what happened to the angle of refraction (please help )
a. it becomes less
b. it becomes more
c. it stays the same
Explain how a manufacturing business might participate in the ""resource disposal"" aspect of resource management.
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
a horizontal force of 25 newtons eastward causes a 10 kg box to have a displacement of 5m eastward. The total work done by the 25 Newton force is?
Answer:
125 J
Explanation:
Work done = force * distance
work = 25 * 5
work = 125 J
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)?
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.
An astronaut drops a 1.0 kg object and a 5.0 kg object on the Moon. Both objects fall a total distance of 2.0 m vertically. Which of the following bost describes the objects after they have fallen a distance of 1.0 m2
They have each gained one-half of their maximum kinetic energy
They have cach lost the same amount of potential energy
They have each gained the same amount of potential energy
They have each lost kinetic energy
Answer:
Chupapi munyaño hoyaaaa
the process of mitosis makes body cells which are also called_______ cells.
NEED DONE ASAP!!!!!
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 density of a material is 22.5 g/cm^3.Express this in SI units.
Answer:
22500kg/m³
Explanation:
SI unit is kg/m³
1g/cm³=1000kg/m³
22.5g/cm³=?
22.5 * 1000
=22500kg/m³