Answer:
Objects underwater seem closer to the surface than they actually are because light rays from the object bend away from the normal as they pass from water to air making the objects look closer.
Supposed there is no electrical current in a coil of wire that contains a permanent magnet. Which statement must be true?
A. The coil and the magnet are of different lengths
B. The coil and the magnet are the same length
C. The coil and the magnet are not moving relative to each other
D. The coil and the magnet are moving relative to each other
Answer:
c
Explanation:
a pex
When a coil of wire is stationary and there is no relative motion between the coil and a permanent magnet, there will be no induced electrical current in the coil. The correct statement in this scenario would be C. The coil and the magnet are not moving relative to each other.
Electromagnetic induction states that a change in magnetic field through a conductor (in this case, the coil of wire) will induce an electromotive force (EMF) or voltage across the ends of the conductor. This induced voltage can then drive an electric current to flow if there is a complete circuit.
When there is no electrical current flowing through a coil of wire that contains a permanent magnet, the interaction between the magnetic field of the magnet and the coil's magnetic field depends on their relative motion. In this case, if there is no movement between the coil and the magnet, the magnetic fields are not changing with respect to each other. Therefore, the absence of relative motion between the coil and the magnet is the condition in which no electrical current is induced in the coil.
Therefore, the correct statement in this scenario would be C. The coil and the magnet are not moving relative to each other.
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Someone please help will mark as brainliest
If you are driving forward and suddenly break, what would happen to your body and which law does that demonstrate?
A. Move forward, 1st Law
B. Go back, 2nd Law
C. Go back, 1st Law
D. Move forward, 2nd Law
Answer:
1st law you would move forward if you were sitting right with a seatbelt
If you are driving forward and suddenly break due to inertia your body moves forward demonstrating newton's first law of motion. Therefore, option (A) is correct.
What Is Newton’s First Law of Motion?Newton’s 1st law of motion can be defined as the object will stay in the state of rest or uniform motion in a straight line until and unless an external force acts on it.
Once the body starts to move, it won't stop or change its speed until and unless some external force applies upon it one or more times. Newton's 1st law of motion is also known as law of inertia.
There are two conditions for Newton's first law of motion. If an object is at rest, velocity (v) and acceleration (a) are equal to zero. Therefore, the object will continue to be at rest state.
When a body is already in motion, velocity will be non-zero (v ≠ 0), while acceleration (a = 0) is equal to zero. Therefore, the body will continue to be in motion with the same speed and in the same direction.
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1. James drives 400 km in 5 hours to his grandmothers. What are the units for speed going to be?
2. James drives 400 km in 5 hours to his grandmothers. What is the distance he will travel?
3. James drives 400 km in 5 hours to his grandmothers. What is the time it takes to get there?
Answer:
See the answer below
Explanation:
1. Speed is calculated as the ratio of distance and time. Hence, Jame's speed can be calculated as:
400/5 km/hr = 80 km/hr
The unit for the speed would be km/hr. This can also be converted to m/s:
80 km = 80,000 m
1 hr = 3,600 s
80 km/hr = 80,000/3600 m/s = 22.22 m/s
2. Since James drove 400 km in 5 hours, the distance he drove is 400 km.
3. The time it took for James to get there is 5 hours.
which phase happens immediately after a third quarter moon
Answer:
waning gibbous
Explanation:
new Moon.
waxing crescent Moon.
first quarter Moon.
waxing gibbous Moon.
full Moon.
waning gibbous Moon.
last quarter Moon.
waning crescent Moon
These are the phases the moon goes through!
Answer:
Ur mom lol
Explanation:
Ur mom lol
.org
A string is tied with a 0.500 kg object and swung around a
person's head in a horizontal circle. The length of the string is
1.00 m. The maximum speed the object can be swung without
breaking the string is 7.07 m/s. What is the force the string can
withstand without breaking?
Answer: 25 N
Explanation:
Answer:
7.07 m/s
Explanation:
If your on ck12 like me this might be one of your answer choices, just got it correct so im sharing.
PLZ HELP I I HAVE NO IDEA WHAT THIS IS
Each of the eight planets in the Solar System follows a different elliptical orbit around the Sun. An ellipse is a type of oval shape. Each planet's orbit is at a different distance from the Sun than the other planets' orbits.
Beginning nearest to the Sun, the order of the planets is: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune.
Based on this order, which of the following is true of Mercury?
A.
It must travel farther than Earth does to complete one orbit around the Sun.
B.
It travels a shorter distance than Earth does to complete one orbit around the Sun.
C.
It travels the same distance as Earth does to complete one orbit around the Sun.
D.
It must travel in the opposite direction around the Sun than Earth does.
Answer:
It must travel farther than Earth does to complete one orbit around the Sun.
Explanation:
Each planet orbits around the Sun along an elliptical path. The farther away from the Sun a planet is, the larger the ellipse. The larger the ellipse, the longer the distance around it. Because the orbit of Mars is larger than the orbit of Earth, Mars must travel farther than Earth does to complete one orbit around the Sun.
Mercury travels a shorter distance than Earth does to complete one orbit around the Sun.
Based on the positions of the 8 planets from the sun, Mercury is closest to the sun. The implies that the distance of Mercury from sun is very short when compared to Earth or other planets.
The shorter the distance, the shorter time it would require to make a complete orbit around the sun.
For instance;
It takes Mercury about 88 days to make a complete orbit around the sunIt takes Earth about 365 days to make a complete orbit around the sunThus, we can conclude that Mercury travels a shorter distance than Earth does to complete one orbit around the Sun.
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Motor of 1 HP has 66% efficiency it can lift some water at 10 metre height in 2 seconds what is the mass of the water
Answer:gand maraoo
Explanation:put your hand on your assignment
The rate at which energy is transferred is called
Answer:
The rate at which energy is transferred is called power and the amount of energy that is usefully transferred is called efficiency.
Answer:
your answer is power..
if the density of wood is 0.5g/cm3 what is the mass of 1cm3
Answer:
O. 5 g
Explanation:
It literally says for every cm3 its 0.5 g
An apple is dropped from rest. A. Calculate the vertical velocity of the apple at 2.5 seconds? B. Calculate how far the apple has fallen in 2.5 seconds?
Answer:
A. 24.5 m/s
B. 30.63 m
Explanation:
A. Determination of the vertical velocity of the apple.
Initial velocity (u) =?
Time (t) = 2.5 s
Acceleration due to gravity (g) = 9.8 m/s²
Vertical velocity (v) =?
v = u + gt
v = 0 + (9.8 × 2.5)
v = 0 + 24.5
v = 24.5 m/s
Thus, the vertical velocity of the apple is 24.5 m/s.
B. Determination of how far the apple has fallen.
Time (t) = 2.5 s
Acceleration due to gravity (g) = 9.8 m/s²
Height (h) =.?
h = ½gt²
h = ½ × 9.8 × 2.5²
h = 4.9 × 6.25
h = 30.63 m
Thus, the apple has fallen 30.63 m in 2.5 s.
Choose the best description for prokaryotic cell.
has a nucleus; found in multicellular organisms
has no nucleus; found in unicellular organisms
has no nucleus; found in multicellular organisms
has a nucleus; found in unicellular organisms
Answer:
has no nucleus; found in unicellular organisms
Explanation:
Prokaryotic cells are primitive cells found in lower organisms. Prokaryotic cells do not have a true cell.
A true nucleus lacks an envelope which contains the nuclear materials. Most of the organelles lacks membrane bound organelles. The true nucleus is lacking in prokaryotes.Eukaryotic cells have true nucleus.
Answer:
The answers B
Explanation:
A 1200 kg car is traveling 21.1 m/s. It collides with a stationary car of mass 1500 kg, and the two vehicles lock together. What is the speed of the combined cars immediately after the collision?
A) 7.5 m/s
B) 16.5 m/s
C) 9.4 m/s
D) 11.8 m/s
Answer:
C) 9.4 m/s
Explanation:
[tex]m_1[/tex] = Mass of moving car = 1200 kg
[tex]u_1[/tex] = Initial velocity of moving car = 21.1 m/s
[tex]m_2[/tex] = Mass of stationary car = 1500 kg
[tex]u_2[/tex] = Initial velocity of stationary car = 0
v = Velocity of the combined cars
As the momentum in the system is conserved we have
[tex]m_1u_1+m_2u_2=(m_1+m_2)v\\\Rightarrow v=\dfrac{m_1u_1+m_2u_2}{m_1+m_2}\\\Rightarrow v=\dfrac{1200\times 21.1+1500\times0}{1200+1500}\\\Rightarrow v=9.378\approx 9.4\ \text{m/s}[/tex]
The velocity of the combined mass is 9.4 m/s.
Most asteroids _____.
A) revolve around Jupiter in the asteroid belt
B) take millions of years to orbit the sun
C) are found between Mars and Jupiter
D) are larger than 1,000 km in diameter
Answer:
C
Explanation:
The answer is C cause ... look at the file I added! Plz mark as brainlest! PASS THE TEST OR ASSIGNMNETT!
The picture below was taken in the Maldives.
Which process most likely led the beach to form?
A.
Sediment being deposited as an ocean breeze slows down along the coast
B.
Palm trees breaking apart large pieces of granite and limestone
C.
Coral reefs in the ocean breaking down and being deposited ashore
D.
Rock on the beach being weathered by the water and falling apart
Answer:
it is c
Explanation:
a.p.e.x
i took the test
Suppose an object's acceleration is negative. Use the formula for
acceleration to explain what this implies about the initial and
final velocities.
Explanation:
Vi>Vf
so the initial is greater than from the final
hope it helps u have a great day
HELP ME PLEASE *50 points*
Use the diagram on the answer document to answer the following:
A. How much force is necessary to start the object moving?
B. How much force is necessary to keep this object moving?
C. If it starts at rest, will the object start to slide?
D. Depending on "C" either find the acceleration of the object or the additional force
necessary to move it.
660 newtons
830 newtons
no
additional force would be 350 newtons
Look at the diagram showing the different wavelengths in sunlight.
A diagram showing the human eye and visible light. Visible light is broken down by color with wavelength in nanometers. Red is 700, orange is 600, yellow is 580, green is 550, blue is 475, indigo is 450, violet is 400.
Which statement describes electromagnetic waves with wavelengths greater than 700 nanometers?
They take the form of heat.
They can cause skin cancer and sunburn.
They are some of the shortest waves.
They can be seen by human eyes as visible light.
What do the arrows at point 3 indicate?
Cool air is above water.
Warm air is above land.
Warm air is cooling quickly.
Cool air is warming quickly.
Answer:
D
Explanation:
Look at the diagram showing the different wavelengths in sunlight. A diagram showing the human eye and visible light. Visible light is broken down by color with wavelength in nanometers. Red is 700, orange is 600, yellow is 580, green is 550, blue is 475, indigo is 450, violet is 400.
the only answer that makes sense is D
PLS HELP ME I'LL GIVE BRAINLIEST
A bug crashes into a high-speed bus. The force experienced by the bug is equal to (less than, equal to, greater than) the force experienced by the bus. The resulting acceleration of the bug is ____________ (less than, equal to, greater than) the resulting acceleration of the bus.
Answer:
equal to
i hope this helps
i need to speak with zuka
Answer:
DMs are not accessible anymore. I assume Zuka is a staff member? the only way to talk to a staff member anymore is to report something, but even then, the probably won't even look at what they're deleting :/
May I have brainliest please? :)
2. Unlike friction, gravity
a. is a force.
b. acts over a distance.
c. acts between objects that are not touching.
d. two of the above
Unlike friction, gravity is a force and acts between objects that are not touching. The correct option is d.
What is gravity?Gravity is the force by which an object attracts another object toward its center.
Gravity is also known as the gravitation force that acts between the two objects kept a distant apart.
Thus, option d is correct.
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An object of mass 10 kg is in a circular orbit of radius 10 m at a
velocity of 10 m/s. Calculate the centripetal force (in N) required
to maintain this orbit.
We have that for the Question "Calculate the centripetal force (in N) required to maintain this orbit." it can be said that the centripetal force (in N) required to maintain this orbit is
F=62.5N
From the question we are told
An object of mass 10 kg is in a circular orbit of radius 10 m at a
velocity of 10 m/s.
Calculate the centripetal force (in N) required to maintain this orbit.
Generally the equation for the Centripetal force is mathematically given as
[tex]F=\frac{mv^2}{r}\\\\F=\frac{5*10^2}{8}[/tex]
F=62.5N
Therefore
the centripetal force (in N) required to maintain this orbit is
F=62.5N
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If I fell asleep at 9:42 pm and woke up at 10:06 am. What was the total hours of sleep I got?
Answer:
11 hours and 24 minutes total of sleep. Nice.
Explanation:
Since its going from pm to am, We have to go past 12 to 1 and go to 9 hours am, then add 42 by 24 minutes to get to the 6 minutes past 10.
#teamtrees #WAP (Water And Plant)
Answer:
An hour and 36.
1:36
Explanation:
During
storms, there is greater possibility of bigger trees breaking down than the small one
Answer:
umtkrumryu
Explanation:
Answer:
oh wow did not know that thanks! good things there no big trees where I am
Explanation:
Why does fulcrum placement matter for how a lever works?
Answer:
The mechanical advantage of using a lever is affected by the distance between the effort and the fulcrum and by the placement of the load. ... When the fulcrum is centered between the load and the lift, the amount of effort exerted to push down on the lever equals the amount of the load being lifted on the other end.
Density=2g/mL and volume=20mL what is mass
Answer:
40g
Explanation:
Mass = density x volume
= 2 x 20
= 40g
Answer:
m = V × ρ
= 20 milliliter × 2 gram/cubic meter
= 2.0E-5 cubic meter × 2 gram/cubic meter
= 4.0E-5 gram
= 4.0E-8 kilogram
Explanation:
The density of a material, typically denoted using the Greek symbol ρ, is defined as its mass per unit volume.
ρ =
m
V
where:
ρ is the density
m is the mass
V is the volume
The calculation of density is quite straightforward. However, it is important to pay special attention to the units used for density calculations. There are many different ways to express density, and not using or converting into the proper units will result in an incorrect value. It is useful to carefully write out whatever values are being worked with, including units, and perform dimensional analysis to ensure that the final result has units of mass volume. Note that density is also affected by pressure and temperature.
Matter can undergo chemical reactions and nuclear reactions. Which property is conserved in nuclear reactions?
Answer:
Explanation:
In a chemical reaction, table sugar (sucrose) is mixed with sulfuric acid. The result of the reaction is a towering black structure of elemental carbon, water vapor, carbon dioxide, and sulfur dioxide gases.
Answer: total mass number
Explanation:
A car increase velocity from 30 m/s to 60 m/s in 4 seconds
Answer:
Acceleration = 7.5
Explanation:
Vf = 60m/s
Vi = 30m/s
t = 4s
[tex]Acceleration = \frac{Velocity Change}{Time Change}\\ a = \frac{60m/s-30m/s}{4s}\\ a = \frac{30m/s}{4s}\\ a = 7.5m/s^2\\ or a = 8m/s^2[/tex]
Una cuerda horizontal puede transmitir una potencia máxima P (sin romperse) si por ella viaja una onda con amplitud A y frecuencia angular W. Para aumentar esta potencia máxima, un estudiante dobla la cuerda y usa esta "cuerda doble" como medio. Determine la potencia máxima que se puede transmitir a lo largo de la "cuerda doble", si supone que la tensión en las dos hebras juntas es la misma que la tensión original en la cuerda individual.
Answer:
P´ = 11.3 P
power increases 11.3 times
Explanation:
For this exercise let's use the equation for power transmitted on a string
P = ½ μ w² A² v
when we bend the rope the area and density change
A´ = 2 A
μ'= 2m / l
μ'= 2 μ
the speed of the rope is
v² = T /μ
indicate that the tension in the two strands is the same
v´² = T / μ´
v´² = T / 2μ
v´ = √ ½ v
we substitute in the power
P´ = ½ μ´ w² A´² v´
P´ = ½ 2μ w² 4A v/√2
P´ = 8/√2 P
P´ = 11.3 P
power increases 11.3 times
Latent heat of vaporization refers to which changes of state?
a. liquid to gas or gas to liquid
b. solid to gas or gas to solid
c. solid to liquid or gas to liquid
d. gas to liquid or liquid to solid
Answer:
I think it is A and yes I think it is A but I think it is A and I am not playing with you
Latent heat of vaporization refers to changes of state from liquid to gas or gas to liquid. Hence, option (a) is correct.
What is latent heat?In thermodynamics, latent heat is the heat or energy that is absorbed or released when a substance undergoes a phase change. A liquid to solid transition or a gas to liquid transition are both possible. Enthalpy, another heat attribute, is connected to latent heat.
When matter breaks down and transitions from a fluid to a gas at a constant temperature, this is known as latent heat of vaporization.
The heat of water vaporization is the highest known temperature. The heat of vaporization is defined as the amount of heat necessary to turn 1 g of a fluid into a fume without causing the fluid's temperature to change.
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