A boat goes from 12m/s to 72m/s in 12 s. what is the boat's acceleration?
Answers
Related Questions
A steel fork and a plastic spoon are both at the same temperature. The fork feels colder when you touch it. This is because:
1. Steel conducts thermal energy better than plastic.
2. Plastic loses more thermal energy than steel.
3. Steel contains more thermal energy than plastic.
4. The fork has more mass than the spoon.
Answers
Answer: The fork feels colder when you touch it because Steel conducts thermal energy better than plastic. The correct statement is 1
Explanation:
The ability of a material to transfer heat energy in an environment is known as thermal conductivity. It feels cooler to touch a steel spoon than a plastic spoon found in the same temperature because steel which is a type of metal is a highly efficient thermal conductor than spoon which is a plastic.
Metals can be defined as those substances which forms positive ion in a chemical reaction by lossing it's electrons. It has the following properties:
--> it is solid at room temperature
--> it has high melting point
--> it has high boiling point and
--> it is malleable.
Metals are said to be good thermal conductor because they contain free flowing conduction electrons. Therefore, when you touch a steel spoon and plastic spoon, it feels cooler because the steel metal is able to conduct heat away from your hand faster than the plastic which is a poor conductor of heat.
Answer:
1. Steel conducts thermal energy better than plastic.
Explanation:
Both objects are at the same temperature, and when you touch them, you feel the steel to be colder.
This happens because steel is a better thermal conductor, then when you touch it, it "steals" more thermal energy from you than the plastic.
As the amount of thermal energy transmitted is greater for the steel, you will feel it to be colder.
Then the correct option is the first one, steel conducts thermal energy better than plastic.
A linebacker runs at 3 m/s and collides with a running back running towards him at 3.2
m/s. If the running back bounces back and the linebacker stops what could be
assumed about the momentum of the running back?
A The momentum would be less than the sum of the two players before they collide
B The momentum would be twice as much as before the collision
C. The momentum would be eliminated.
D The momentum would equal the sum of the two players before they collide
Answers
Answer:b
Explanation:
im in fifth grade so i guessd. gl tho heh.
The answer will be an option C. The momentum would be eliminated for the running back.
What is elastic collision?The collision in which the object bounces off after the collision is called the elastic collision. The one condition is given in the question that after the collision the running back bounces back and the linebacker stops
A linebacker runs at 3 m/s and collides with a running back running toward him at 3.2m/s. If the running back bounces back and the linebacker stops it means that the collision is elastic. And all the momentum is transferred to the other person.
Therefore the answer will be an option C. The momentum would be eliminated for the running back.
To know more about elastic collision follow
https://brainly.com/question/7694106
#SPJ2
HELP PLS WILL MARK BRAINLEST
A bobsled is moving at its greatest speed around the final turn.
O Potential
O Kinetic
Answers
Answer: Kinetic Energy
Explanation:
What is the change in direction of a wave that occurs when the wave changes speed when moving from one medium to another?
A.) Transmission
B.) Constructive Interference
C.) Destructive Interference
D.) Diffraction
Answers
Which statement about electromagnetic waves is true?
A: They move slowly.
B: They carry matter from one place to another.
C: They need a medium to travel through.
D: They can travel through a vacuum
Answers
Consider the differences between a horseshoe magnet and a bar magnet. Is the attraction or repulsion going to be stronger or weaker between two horseshoe magnets or two bar magnets, as shown here? How would that influence the density of magnetic field lines?
Answers
Answer:
Stronger.
Explanation:
which force below comes from an object receiving support. For example a book sitting on a table receives what force from the table?
Answers
What kind of friction exists between solid objects moving In water?
static friction
sliding friction
rolling friction
drag
Answers
Answer:
The answer is drag.
Explanation:
Hope this helped Mark BRAINLEST!!!!!
Answer: D. Drag
Explanation:
Drag friction exists between solid objects moving in the water.
a loud soundin heared at resonence why
Answers
ANSWER :
Complete answer:
The resonance happens when the frequency of the vibration of one body matches with the frequency of vibration of another body. ... So, the loud music causes the air particles to vibrate and when we stand close to the source of loud music, it causes resonance and hence we feel our body shake or vibrate.
The following table describes some landforms.
Landform Created By Found In
Wind erosion Water or glacial erosion Depositions Deserts Coasts Mountains
A Yes Yes No No Yes No
B Yes No Yes Yes Yes No
C No Yes No No No Yes
D No No No No No No
Which landform is most likely a valley?
Landform A
Landform B
Landform C
Landform D
Answers
Answer:
Landform A.
Explanation:
Coastlines are created by wind and water erosion. The coast, also known as the coastline or seashore, is defined as the area where land meets the sea or ocean, or as a line that forms the boundary between the land and the ocean or a lake. The picture/graph associated with this question is attached.
Answer:
Landform A.
Explanation:
TAKING TEST NOW NEED ASAP !!
What does the standard deviation of a set of data tell you?
A. The maximum value of the data
B. How many data points there are
C. How spread out the data are
D. The smallest data value
Answers
Answer:
C
Explanation:
I think that's it. dont know if that's rogue
Answer:
c
Explanation:
i dont know
just felt
What would likely happen first to the carbon in the deer carcass as it lies on the forest floor after the mountain lion has finished feeding on it?
a.
It would be incorporated into other organisms.
b.
It would be released back into the atmosphere.
c.
It would be turned into coal.
d.
It would be incorporated into the soil.
Answers
Answer:
B: It would be released back into the atmosphere.
Explanation:
How are faults that occur in the middle of tectonic plates different from plate boundaries?
Answers
Divergent boundaries – where two plates are moving apart.
Transform boundaries – where plates slide passed each other.
:)
Causes of Earthquake
An earthquake is caused by a sudden slip on a fault. The tectonic plates are always slowly moving, but they get stuck at their edges due to friction.
Five causes of earthquake?
1. Volcanic Eruptions. The main cause of the earthquake is volcanic eruptions.
2. Tectonic Movements. The surface of the earth consists of some plates, comprising of the upper mantle
3. Geological Faults
4. Groundwater extraction – decrease in pore pressure.
5. Groundwater – increase in pore pressure.
6. Heavy rain.
7. Pore fluid flow.
8. High CO2 pressure.
9. Building dams.
Explanation:
Now, Boundaries between tectonic plates are made up of faults. which are associated with the various types of fault, normal, reverse and strike-slip faults
More so, Plate boundaries are always faults, but not all faults are plate boundaries.
For more information on Earthquakes see
https://brainly.ph/question/910216
An object's WEIGHT describes how much force the object presses down on the Earth. It can be calculated using the formula WEIGHT = MASS x GRAVITY. REmember that gravity on the Earth is 10m/s2. If Susan has a mass of 70Kg, what is her weight in newtons?
Answers
Answer:
700N
Explanation:
W=m×g
W=70kg×10N/m
W=700N
a rock on the moon has a mass of 17kg, what is the mass if this same rock on earth?
Answers
Mass is an intrinsic property of the rock. The mass doesn't care where it is, and it makes no difference where the rock happens to be at the moment ... its mass doesn't change.
17kg of mass is 17kg . If it's 17kg on the moon, it's 17kg on Earth.
PLEASE HELP ASAP!! DUE IN AN HOUR :’))!!
Answers
Answer: The object moves with constant velocity
Explanation:
In this velocity vs time graph we're dealing with Ap physics or regents physics. If we look at the slope we can see it is constant or not changing. Even so lets check the other answers and prove them wrong
The objects speed increases: This is wrong because the line shows a steady 5m/s with no change
The object is in free fall: If the object was in freefall the speed would be increasing as a result of acceleration due to gravity
The object moves with a constant speed: This seems to be the case since the slope or line doesn't change at all
The object stays at rest: Can't be right because the object is at a speed of 5m/s so we know its moving at least
The objects speed decreases: Again the line isn't going up or down so we can't say speed increases or decreases
What is static friction?
A. Friction that acts when an object is not moving
B. Friction that exerts no force
O C. Friction that opposes air resistance
D. Friction that acts on a sliding object
Answers
Answer:
the awsner is d because friction is caused by two objects touching
Answer:
It’s friction that acts when an object is not moving
Explanation:
An ac generator provides emf to a resistive load in a remote factory over a two-cable transmission line. At the factory a step- down transformer reduces the voltage from its (rms) transmission value Vt to a much lower value that is safe and convenient for use in the factory. The transmission line resistance is 0.30 /cable, and the power of the generator is 250 kW. If Vt 80 kV, what are (a) the voltage decrease V along the transmission line and (b) the rate Pd at which energy is dissipated in the line as thermal energy
Answers
Answer:
a) 1.875 volts
b) 5.86 W
Explanation:
Given data:
transmission line resistance = 0.30/cable
power of the generator = 250 kW
if Vt = 80 kV
a) Determine the decrease V along the transmission line
Rms current in cable = P / Vt = 250 / 80 = 3.125 amps
hence the rms voltage drop ( Δrmsvoltage )
Δrmsvoltage = Irms* R = 3.125 * 2 * 0.30 = 1.875 volts
b) Determine the rate Pd at which energy is dissipated in line as thermal energy
Pd = [tex]I^2rms*R[/tex]
= 3.125^2 * 2* 0.30 = 5.86 W
TIME REMAINING 54:08 If a cup of coffee is at 90°C and a person with a body temperature of 36°C touches it, how will heat flow between them? from the hand to the cup from the cup to the hand from the cup to the surrounding air from the hand to surrounding air
Answers
Answer:
from the cup to the hand
Explanation:
Conduction is the heat transfer due to contact between object. During conduction, heat energy is transferred by contact from a body with higher temperature (hotter body) to a body with lower temperature (cooler body).
When a person with body temperature of 36°C comes in contact with a cup of coffee with temperature of 90°C, heat is transferred from the cup to the hand because the cup is hotter.
PLS HURRY THIS IS DUE IN 5 mins
(a) Waves P and Q have the same
but wave P has twice the
of wave Q.
(b) Waves Q and R have the same
but wave R has twice the
of wave Q.
(c) Wave
shows a steady frequency but changing amplitude.
(d) Wave
shows steady amplitude but a changing frequency
Tel Waves
and
have a lowamplitude and a steadvafrecuency
Answers
Answer:
(a) Waves P and Q have the same wavelength but wave P has twice the amplitude of wave Q.
(b) Waves Q and R have the same amplitude but wave R has twice the wavelength of wave Q.
(c) Wave T shows a steady frequency but changing amplitude.
(d) Wave S shows steady amplitude but a changing frequency.
e) Waves Q and R have a low amplitude and a steady frequency.
what do we mean by principle of conservation?
Answers
Answer:
Conservation principles tell us that some quantity, quality, or aspect remains constant through change.
Explanation:
5. Why are ceramics and plastics good insulators?
Answers
Answer:
Here
Explanation:
They don't have free electrons moving around (delocalised electrons) so they can't conduct heat and electricity which gives them a property of good insulators. The insulators stop us having an electric shock because they don't conduct electricity as we use them to insulate metal wires and other metallic things. can i have brainliest now pls!
ocean high tides are an example of a 1 contact 2 non contract 3 neither. force
Answers
Answer:
1 contact
Explanation:
That is because the wind contacts the waves ang they go high.
Can you give me an example of how sound passes through a solid?please help
Answers
Answer:
sound travels through steel about 15 times faster than through air.
Explanation:
According to the big-bang theory how the universe might end?
Answers
Answer:
If the Universe holds enough matter, including dark matter, the combined gravitational attraction of everything will gradually halt this expansion and precipitate the ultimate collapse. Over time, galaxies, then individual stars, will smash into each other more frequently, killing off any life on nearby planets.
What is the speed of a shark that traveled 15 miles in 1 hour
Answers
Soln_
T = 1 hrs × 15 mils
=60 × 15
=900 ans#
AWARDING BRAINLIEST
The distance traveled divided by the time taken to travel the distance is ____.
a.
average speed
c.
momentum
b.
mass
d.
velocity
Answers
the answer is A
average speed
what if you were a mother for a day boys and girls
Answers
Boom
can anyone plz answer this now and give me a right answer?
Answers
Answer:
90 degree hope it help :))
Answer:
I think 87 degree
Julio decides to break the Guinness Book of World Records for bungee jumping. He goes
to the Macau Tower in China where the current record is held. After several heart-pounding
seconds, he leaps from a height of 233 meters. If his weight is 86 kilograms, what would his
potential energy be just prior to jumping? If when he jumped he reached a speed of 15 m/s, what
is his kinetic energy? Explain your answer
Answers
Answer:
a) U = 1.96 10⁵ J, b) K = 9.675 10³ J
Explanation:
a) the potential energy is
U = m g h
where zero energy in general takes the floor
let's calculate
U = 86 9.8 233
U = 1.96 10⁵ J
b) They ask for kinetic energy and give us the speed of man
K = ½ m v²
let's calculate
K = ½ 86 15²
K = 9.675 10³ J