Answers
Answer: The answer is B) It was once underwater.
a is wrong because i don’t think there would be many glaciers where elk and sharks are
b is wrong because although there was an ocean that sharks could live in, there are still elk and they don’t live in the water
and d is wrong bc i don’t think elk or any other animal would like it to be super cold, also a means it would be cold and a is wrong.
(also i am not 100% sure this is just a guess) - hope this helps
Related Questions
(b) Convert 1890Tm to nm Conversion factor 1018 meaning 10¹8 nm=1Tm Conversion from big unit to small unit (Tm to nm) 1018 nm 1m 1890Tm x 1.89 x 1021 nm
Answers
To convert 1890Tm to nm, we can use the conversion factor \(10^1^8 nm = 1 Tm\). Therefore, 1890Tm is equivalent to \(1.89 * 10^2^1 nm.\)
What is an example of unit conversion?The same attribute is expressed using a unit conversion, but in a different unit of measurement. For instance, time can be expressed in minutes rather than hours, and distance can be expressed in kilometers, feet, or any other measurement unit instead of miles.
How are all SI units converted?Divide or multiply by powers of 10. Because you multiply or divide by 10 - often more than once - SI units are simple to convert. Consider a staircase. For each step up, you multiply by 10, and for each step down, you divide by 10.
Multiplying 1890Tm by the conversion factor, we get:
\(1890Tm *10^1^8 nm / 1Tm = 1890 * 10^1^8 nm\)
Simplifying, we get:
\(1890Tm = 1.89 * 10^2^1 nm\)
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HELP ASAP!!!! WILL TRY TO GIVE BRAINLIEST!
Locate cilia and flagella and explain what are they composed of and what they do.
Answers
Answer:
Cilia and flagella are projections from the cell. They are made up of microtubules , as shown in this cartoon and are covered by an extension of the plasma membrane. They are motile and designed either to move the cell itself or to move substances over or around the cell.
Explanation:
A machine does 1200 J of work in 1 min. What is the power developed
by the machine? (Power = Work/time) in Watts OR Joules/second
Answers
Answer:
20 watts
Explanation:
Big brain mode activated:
Power=1200J/60sec
Power=20 watts
A red sled slides across a sheet of ice toward a stationary green sled. The two sleds collide and continue sliding together.
After the collision, what is true about the velocity of the two sleds?
Answers
If a red sled slides across a sheet of ice and collides to a stationary green sled and continue sliding together, the velocity of the two sleds will be equal.
This type of collision is called as inelastic collision. In this type of collision, the two objects that undergo collision will move a single object after collision. So they cannot have different velocities.
According to law of conservation of momentum,
m1u1+ m2u2 = m1v1 + m2v2
In inelastic collision,
v1 = v2 = v
m1u1+ m2u2 = ( m1 + m2 ) v
Therefore, the velocity of the two sleds will be equal.
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Solids are most stable when they are _____. A. oxidizers B. crystalline C. amorphous D. melting
Answers
Solids are most stable when they are crystalline. The correct answer is option B.
Solids are all those bodies that are in the state of aggregation of matter known as solid. They have particulate and specific properties. Likewise, solid matter can be crystalline, quasi-crystalline, amorphous and composite.
Crystalline solids have a well-defined and ordered structure, which makes them more stable than amorphous solids, which have a less ordered structure. Oxidizers and melting are not relevant to the stability of solids.
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Io completes one orbit about Jupiter in 1.77 days1.77 days and the average Jupiter–Io distance is 4.22×108 m.4.22×108 m. Calculate the angular speed ????ω of Io as it orbits Jupiter.
Answers
The angular speed of Io as it orbits Jupiter is approximately: 9.43 x 10⁻⁵ rad/s.
The formula for angular speed w = 2π/T relates the angular displacement per unit time to the time for one complete orbit. To use this formula, we need to convert the time for one orbit from days to seconds by multiplying by 24 (hours per day) and 3600 (seconds per hour), giving:
T = 1.77 x 24 x 3600 seconds = 153216 seconds
The average distance between Jupiter and Io is 4.22 x 10^8 m, which is the radius of the circular orbit that Io follows around Jupiter. Therefore, the circumference of the orbit is 2π times the radius, or:
C = 2π x 4.22 x 10^8 m = 2.66 x 10^9 m
The angular speed w of Io can now be calculated using the formula w = 2π/T, which gives:
w = 2π / (1.77 x 24 x 3600) seconds⁻¹ = 9.43 x 10⁻⁵ rad/s
As a result, Io orbits Jupiter at an angular speed of 9.43 x 10⁻⁵ rad/s.
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Complete question:
Io Completes One Orbit About Jupiter In 1.77 Days And The Average Jupiter-Io Distance Is 4.22 X 100 M. Calculate The Angular Speed W Of Io As It Orbits Jupiter. W = Rad/S
I NEED HELP!! PLEASE HELP ME
Answers
Answer:
but I can tomorrow if you have time can you come to the meeting tonight but yyyy the person who is this and what
Explanation:
gyyyyyyyyyyyyyyyyy the number of the person who is this and what is the
Why do some organisms never turn into fossils?
A. They are far too large to be buried in the ground.
B. They are made mostly of soft tissues.
C. They contain too much protein to be preserved.
D. They contain chemicals that prevent the hardening of their bodies.
Answers
Answer:
The answer is B.
Explanation:
Since they are made up of soft tissues, they decompose become they become fossils.
Which of the following best describes the term thermal energy? Choose one: A. The energy of an object in motion due to its mass B. The kinetic energy of atoms, ions, and molecules C. The energy stored in an object because of its position D. The energy a particle has because of its charge and its position relative to another particle Part 2 (0.5 point)See Hint Which of the following best describes the term electrostatic potential energy?
Answers
Answer:
The correct option is (d).
Explanation:
The energy a particle has because of its charge and its position relative to another particle is called thermal energy. It is the energy that comes from heat. This is generated by the movement of the particles in an object.Thermal energy is the energy an object or system has due to the movement of particles within.Hence, the correct option is (d).
The thermal energy is related to the kinetic energy of atoms, ions, and molecules.
What is thermal energy?The thermal energy of any material is defines as the increase in the internal energy of the material.
When ever heat is given to the material, the atoms and the molecules in the material gains energy and moves with a kinetic energy.
The increase in kinetic energy allows the atoms and the molecules to move with higher velocities in the material, and they collide with each other, thus the temperature of the material increases.
Thus the thermal energy is related to the kinetic energy of atoms, ions, and molecules.
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1. A pumpkin with a mass of 2 kg accelerates 2 m/s/s when an unknown force is applied to it. What is the amount of the force?
Answers
Answer:
The answer is 4 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 2 × 2
We have the final answer as
4 NHope this helps you
Convert 8 m/s to miles per hour
Answers
Answer:
17.8954903 or 17.9 mph
Explanation:
m/s is meters per second. 1609.344 meters is one mile. There are 3,600 seconds in an hour. 8 meters *3600 seconds= 28,800. 28,800/1609.344 = 17.8954903. Simplify to 17.9
N part c of the lab, when two wires are in series, so that current flows in opposite directions inside them, the directions of the magnetic fields in the region between the two wires are ______.
Answers
When two wires are placed in series and current flows in opposite directions inside them, the magnetic fields generated by each wire will interact in the region between the two wires. According to the right-hand rule for determining the direction of a magnetic field, we can determine the directions of the magnetic fields in this scenario.
The right-hand rule states that if you point your thumb in the direction of the current flow, your curled fingers will indicate the direction of the magnetic field created by that current. In this case, since the current flows in opposite directions in the two wires, the magnetic fields will also be in opposite directions.
To be more specific, let's assume that wire A has current flowing from left to right and wire B has current flowing from right to left. If you place your right-hand thumb along wire A pointing towards the right, your curled fingers will wrap around wire A in a clockwise direction, indicating the direction of the magnetic field created by wire A. Conversely, if you place your right-hand thumb along wire B pointing towards the left, your curled fingers will wrap around wire B in a counterclockwise direction, indicating the direction of the magnetic field created by wire B.
Therefore, the magnetic fields in the region between the two wires will be in opposite directions. Wire A will create a clockwise magnetic field, while wire B will create a counterclockwise magnetic field.
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An athlete spins in a circle and throws a 1.6-kg discus. The radius of the discus's path is 1.0 m, and he releases it with an angular speed of 15.0 rad/s. The athlete spins for a total of 1.2 s before releasing the discus.
– What is the tangential speed of the discus at release?
– What is the centripetal acceleration of the discus?
– What is the centripetal force on the discus?
giving Brainliest for full and proper answers! thank you for anyone who tries to help/explain :)
Answers
(a) The tangential speed of the discus at the release is 15 m/s.
(b) The centripetal acceleration of the discus is 225 m/s².
(c) The centripetal force on the discus is 360 N.
The given parameters;
mass of the discus, m = 1.6 kgradius of the path, r = 1 mangular speed, ω = 15 rad/stime of motion, t = 1.2 sThe tangential speed of the discus at the release is calculated as follows;
\(v = \omega r\\\\v = 15 \ rad/s \ \times 1 \ m\\\\v = 15 \ m/s\)
The centripetal acceleration of the discus is calculated as follows;
\(a_c = \frac{v^2}{r} \\\\a_c = \frac{15^2}{1} \\\\a _c = 225 \ m/s^2\)
The centripetal force on the discus is calculated as follows;
\(F_c = ma_c\\\\F_c = 1.6 \times 225\\\\F_c = 360 \ N\)
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why do waves decrease at fixed points
Answers
This is due to the fact that for waves to be conserved when they move from one area to another, the absolute wave duration must remain constant.
When a wave reaches a fixed point, what happens?For instance, a wave comes back upside down when it hits a fixed end. A wave returns in the same direction it came when it hits a free end.
Why does a wave collapse or break?According to research, waves break when their amplitude reaches a critical point at which a significant portion of their wave energy is converted into turbulent kinetic energy, much like a ball rolling down a hill. The right end is fastened and tightly secured. The wave returns as a downward-displaced pulse after reflecting off this fixed end. Inversion happens when a reflection hits a fixed end.
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A 4 coulombs charged particle experiences an electric force of 200 N when placed at point P in an electric field. The magnitude of the electric field at point P is :
a) 5 N/C
b) 800 N/C
c) 0.02 N/C
d) 50 N/C
Answers
(d) 50N/C
The magnitude of the electric field at point 'P' is 50N/C.
It is derived from the basic concepts of Electrostatics. Coulomb's Law is the basis of relations in Electrostatics. It resembles Newton's Law of Gravitation.
Using the relation between Electric force, charge, and Electric field:
F = qE
F = 200N; q = 4C200 = (4)E
E = 50N/C
It is widely used in the calculation of Electric Force and Electric Field. The S.I. Unit of the Electric Force is Newton. The S.I. Unit of the Electric Field is N/C. The S.I. Unit of charge is Coulomb.
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Rank these wavelengths of light in order, according to their frequencies.
1. 0.8 km 2. 5 m 3. 0.02 nm 4. 460 nm 5. 7 cm 6. 3 μm
Answers
From low to high frequency, a wave's wavelength increases while its frequency decreases: 0.8 km, 5 m, 7 cm, 3 m, 460 nm, and 0.02 nm. The characteristic of a wave is known as its wavelength.
A wave's wavelength is the characteristic that determines how far identical locations between two succeeding waves are separated. The Greek letter lambda () is used to represent it. Thus, the wavelength is defined as the separation between one wave's crest or trough and the following wave.
The frequency of an event is its repetitions per unit of time. As a contrast to spatial frequency, it is also sometimes referred to as temporal frequency, and as a contrast to angular frequency, it is sometimes referred to as ordinary frequency.
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does increasing the frquency of a wave also increse its wavelength?if not,how are these quantities related
Answers
Answer:
No.
Explanation:
No, increasing the frequency of a wave will not increase it's wavelength. Rather it will decrease the wavelength because frequency and wavelength are inversely related.
According to Formula:
v = f(lemda)
If the speed is kept constant to find the relationship between f and wavelength.
=> f is inversely propotional to wavelength.
Hope this helps!
Have a great day!
A proton is accereated through a 2.00 V potential difference, the kinetic energy it gained is? (θ=1.60×10
−19
C) 1.60×10
−19
eV 2.00eV 1.00 J 1836eV 1836 J
Answers
The kinetic energy gained by a proton accelerated through a 2.00 V potential difference can be calculated using the formula for the kinetic energy of a charged particle. The correct answer is (a) 1.60×10−19 eV.
The kinetic energy gained by the proton can be calculated using the equation:
K.E. = qV
where K.E. is the kinetic energy, q is the charge of the proton, and V is the potential difference. In this case, the charge of the proton is given as θ = 1.60×10−19 C.
Substituting the values into the equation, we get:
K.E. = (1.60×10−19 C) * (2.00 V)
K.E. = 3.20×10−19 J
To convert the energy from joules to electron volts (eV), we can use the conversion factor that 1 eV is equal to 1.60×10−19 J.
Therefore, the kinetic energy gained by the proton is:
K.E. = (3.20×10−19 J) / (1.60×10−19 J/eV)
K.E. = 2.00 eV
Hence, the correct answer is (a) 1.60×10−19 eV.
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how can understanding velocity help to prevent a mid-air collision
Answers
Answer:
To maintain enough time to prevent a collision, a system operating in air traffic where aircraft speed does not
fall below 100 km/h (most medium-sized UAVs and GA aircraft) will need to be able to detect obstacles which
subtend an arc-width of as small as 0.125 mra
A lens appears greenish yellow (λ = 570 nm is strongest) when white light reflects from it. What minimum thickness of coating (n = 1.25) do you think is used on such a glass (n = 1.52) and why?
Answers
The Minimum thickness obtained is \(228\ nm\). Thin-film interference occurs when light waves reflect from the two surfaces of a thin film with different refractive indices.
Given information:
Wavelength of the greenish-yellow light, \((\lambda) = 570\ nm\)
The refractive index of the coating \(n = 1.25\)
Depending on the thickness of the film and the wavelength of light, constructive or destructive interference can occur, leading to certain colors being enhanced or suppressed.
The greenish-yellow appearance suggests that the coating is designed to enhance light with a wavelength. For constructive interference to occur, the thickness of the coating must satisfy the condition for constructive interference,
Wave length of the greenish-yellow light is:
\(\lambda = 570 nm\\\lambda = 570 * 10^{-9} m\)
The Minimum thickness can be calculated as:
\(t= \lambda/2n\\ t= (570*10^{-9})/(2*1.25)\\ t= 228\ nm\)
Therefore, The Minimum thickness obtained is \(228\ nm\).
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what happens when you put lava in a pool of liquid nitrogen?
Answers
Answer:
Depending on the amount of liquid nitrogen and the size of the lava flow, the nitrogen will regain it gaseous form well before it contacts the surface of the lava. However, due to the energy cost of bringing the liquid nitrogen back to a gas, it will cool the air above the lava by a few degrees, until that air is reheated by the lava itself.
Explanation:
The liquid nitrogen has enough coldness to completely cool down lava, but also it has the exact same energy to make lava explode.
Answer:
With this amount of liquid nitrogen, more than just the surface lava would start to freeze, and immense pressure would build up underneath. Beneath the mouth of the volcano, there would be kilometers (miles) of lava slowly making its way to the surface. Its natural flow would be stopped by the frozen top layer.
Explanation:
Select the best option to explain why the moon is described as a time capsule for Earth’s history?
Question 4 options:
The Apollo astronauts placed a time capsule on the moon’s surface.
The moon has not experienced any changes since its formation.
The moon does not have weather to erode the evidence of asteroid impacts.
Answers
Answer:
The moon does not have weather to erode the evidence of asteroid impacts.
wich is a better deal, 5 tickets for $12.50 or 8 tickets for $20.16
Answers
5 tickets for $ 12.50
Explanation
to figure out this we need to find the unit rate
so
Step 1
the rate is given by:
\(\text{rate}=\frac{Numbe\text{r of tickets}}{\cos t\text{ of those tickets}}\)then
a) for 5 tickets and $12.50
replace and calculate
\(\begin{gathered} \text{rate}=\frac{Numbe\text{r of tickets}}{\cos t\text{ of those tickets}} \\ \text{rate}=\frac{5\text{ tickets}}{12.5\text{ \$}}=0.4\text{ tickets per dollar} \end{gathered}\)b) for 8 tickets and $20.16
replace and calculate
\(\begin{gathered} \text{rate}=\frac{Numbe\text{r of tickets}}{\cos t\text{ of those tickets}} \\ \text{rate}=\frac{8\text{ tickets}}{20.16\text{ \$}}=0.396\text{ tickets per dollar} \end{gathered}\)therefore, the better deal is 5 tickets for $ 12.50, you will get more tickets per dollar
I hope this helps you
A 30 g mass is attached to one end of a 10-cm-long spring.
The other end of the spring is connected to a frictionless pivot on
a frictionless, horizontal surface. Spinning the mass around in a
circle at 90 rpm causes the spring to stretch to a length of 12 cm.
What is the value of the spring constant?
Answers
The value of the spring constant of the spring is 14.7 N/m.
The given parameters;
mass attached to the spring, m = 30 glength of the spring, L₀ = 10 cmangular speed of the mass = 90 rpmfinal length of the spring, L₁ = 12 cmThe extension of the spring is calculated as follows;
\(\Delta x = L_1 - L_0\\\\\Delta x = 12 \ cm - \ 10 \ cm\\\\\Delta x = 2 \ cm = 0.02 \ m\)
The value of the spring constant of the spring is calculated by applying Hooke's law;
\(F = mg = k\Delta x\\\\k = \frac{mg}{\Delta x } \\\\k = \frac{0.03 \times 9.8}{0.02} \\\\k = 14.7 \ N/m\)
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A 8.0 kg bowling ball moves at 3.0 m/s. Calculate the kinetic energy of the ball?
Answers
Answer:
Explanation:
KE = 1/2mv^2
=1/2(8)(3^2)
=4*9
=36 Joules
A 1.50 kg rock is thrown up into the air from ground level, reaches a maximum height of 7.00 m, then returns to the ground. Calculate the rock's momentum as it strikes the ground
Answers
Answer:
17.565 kgm/s
Explanation:
Momentum = mass × velocity
I = mv..................... Equation 1
But we can calculate the value of v using the equation of motion under gravity.
v² = u²+2gs............. Equation 2
Where u = initial velocity, s = maximum heigth, g = acceleration due to gravity.
Given: u = 0 m/s (at the maximum heigth), s = 7.0 m.
Constant: g = 9.8 m/s²
Substitute these values into equation 2
v² = 0²+ 2×7×9.8
v² = 137.2
v = √137.2
v = 11.71 m/s.
Also given: m = 1.50 kg
substitute these values into equation 1
Therefore,
I = 1.5×11.71
I = 17.565 kgm/s
calculate the pressure by sea water when diving to a depth of 100m.what is the pressure acting on the diver?
Answers
Answer:
P = 981000 [Pa] or 98.1 [kPa]
Explanation:
To calculate the pressure at that depth we can use the following expression that defines the static pressure of a fluid as a function of the density and depth of the body with respect to the surface of the liquid.
\(P=Ro*g*h\)
where:
P = pressure [Pa]
Ro = density of the water = 1000 [kg/m³]
g = gravity acceleration = 9.81 [m/s²]
h = depth = 100 [m]
\(P = 1000*9.81*100\\P = 981000 [Pa]\)
how do protons indentify hydrogen?
•will mark brainest
Answers
Answer: Hydrogen is a chemical element with atomic number 1 which means there are 1 protons in its nucleus. Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z.
Explanation: hope this helps
Which changes in surface water movement are likely
to occur when vegetation is removed from the side of
a hill?
A) infiltration decreases and runoff decreases
B) infiltration decreases and runoff increases
C) infiltration increases and runoff decreases
D) infiltration increases and runoff increases
Answers
Answer:
infiltration decreases and runoff increase
Explanation:
The changes in surface water movement which is likely to occur when vegetation is removed from the side of a hill is infiltration decreases and runoff increases.
What is surface overflow?Surface overflow is the flow of water which take place on the surface of the ground. The extra water due to rain or flood arises on the ground or at the surface, flows in the nearby lacks or ponds.
Now if the vegetation is removed, great amount of water started to come from the hills. The result of it, more water started to overflow on the land of the surface. This way the runoff increases.
Infiltration is the way by which the ground level water enters into the soil of the earth.
Now, if the vegetation is removed, a lot of amounts of water started to come from the hills. This excess amount of water does not enter in to the soil of the earth.
The changes in surface water movement which is likely to occur when vegetation is removed from the side of a hill is infiltration decreases and runoff increases.
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a golf ball has a mass 0.046 kkg rests on a tee it is struck by a golf club with an effectiv mass of 0.22 and speed of 44 assuming the collision is elastic, find the speed of the ball when it leaves the tee
Answers
Answer:
210 m/s
Explanation:
We will use this equation for an elastic collision:
m₁v₁ + m₂v₂ = m₁v₁ + m₂v₂ The left side of the equation is before the collision; the right side is after the collision.In this case, m₁ = mass of golf ball (0.046 kg) and m₂ = mass of the golf club (0.22 kg).
Left side of equation:v₁ is 0 m/s since the ball is at rest on the tee.
v₂ is 44 m/s, given in the problem.
Right side of equation:v₁ is what we are trying to find.
v₂ is 0 m/s since the ball will be at rest on the ground.
⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯Plug these values into the elastic collision equation:
(0.046 kg)(0 m/s) + (0.22 kg)(44 m/s) = (0.046 kg)(v₁) + (0.22 kg)(0 m/s)Simplify this equation.
(0.22 kg)(44 m/s) = (0.046 kg)(v₁)Get rid of the units.
(0.22)(44) = 0.046v₁Multiply the left side of the equation.
9.68 = 0.046v₁Divide both sides by 0.046.
210.434782609 = v₁ 210 m/s = v₁The speed of the ball when it leaves the tee is about 210 m/s.