Answer:
One and a half km per minute
Explanation:
Answer:
1.5
Explanation:
What kind of friction exists between solid objects moving In water?
static friction
sliding friction
rolling friction
drag
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
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.
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?
Answer:
700N
Explanation:
W=m×g
W=70kg×10N/m
W=700N
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
Answer:
C
Explanation:
I think that's it. dont know if that's rogue
Answer:
c
Explanation:
i dont know
just felt
4. What property of metals make them good conductors of heat?
Answer:
Their mobile electrons
Explanation:
ocean high tides are an example of a 1 contact 2 non contract 3 neither. force
Answer:
1 contact
Explanation:
That is because the wind contacts the waves ang they go high.
a rock on the moon has a mass of 17kg, what is the mass if this same rock on earth?
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.
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
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:
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
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.
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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
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.
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.
Answer:
B: It would be released back into the atmosphere.
Explanation:
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
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 if you were a mother for a day boys and girls
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?
Answer:
Stronger.
Explanation:
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
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
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
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
How are faults that occur in the middle of tectonic plates different from plate boundaries?
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.
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Which of these shows the correct hierarchical sequence?
organs ► cells ► tissues ► organ systems
cells ► tissues ► organs ► organ systems
organ systems ► tissues ► cells ► organs
tissues ► cells ► organs ► organ systems
Answer:
its b
Explanation:
Option b shows the correct hierarchical sequence of the cellular organization. Starting from cell ► tissues ► organs ► organ systems.
What is cellular organization?Cellular organization in a living system is the organization level from the primary unit of life that is cell to the organ system in a the body. Cells are the basic unit of cellular organization.
Cells contains the nucleus in which the genetic material DNAs are located. Cells joints together to form tissues and tissues of similar functions joints together to form organs.
A group of organs connects together to form organs systems to perform specific functions. Different organ system build the whole body. Therefore, the correct sequence is option B.
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Particle A and particle B are held together with a compressed spring between them. When they are released, the spring pushes them apart, and they then fly off in opposite directions, free of the spring. The mass of A is 5.00 times the mass of B, and the energy stored in the spring was 46 J. Assume that the spring has negligible mass and that all its stored energy is transferred to the particles. Once that transfer is complete, what are the kinetic energies of each particle?
Answer:
Particle A: K.E = 38.3 J
Particle B: K.E = 7.67 J
Explanation:
Given that Particle A and particle B are held together with a compressed spring between them. When they are released, the spring pushes them apart, and they then fly off in opposite directions, free of the spring. The mass of A is 5.00 times the mass of B, and the energy stored in the spring was 46 J. Assume that the spring has negligible mass and that all its stored energy is transferred to the particles. Once that transfer is complete, what are the kinetic energies of each particle?
The total kinetic energy of Particle A and particle B should be equal to 46 J
Since the mass of A is 5.00 times the mass of B, then, the K.E energy of each particle can be calculated by using ratio.
5 + 1 = 6
K.E for particle A
5 /6 × 46 = 230 / 6 = 38.3 J
K.E for particle B
1/6 × 46 = 46 / 6 = 7.67 J
HELP PLS WILL MARK BRAINLEST
A bobsled is moving at its greatest speed around the final turn.
O Potential
O Kinetic
Answer: Kinetic Energy
Explanation:
What is the speed of a shark that traveled 15 miles in 1 hour
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
the answer is A
average speed
Velocity can be described as the same thing as speed but with _________________ included
Answer:
Direction
Explanation: Hope this helps!
Answer:
nvm its direction :))
Explanation:
Speed and velocity both represent a way to measure the change in position of an object relative to time. In fact, for a straight line motion, the speed and velocity of an object are the same (since distance and displacement will be the same). Speed and velocity are measured in the same units: meters per second or m/s.
Velocity is a measure of both speed and direction of motion. Velocity is a vector, which is a measurement that includes both size and direction. Velocity can be represented by an arrow, with the length of the arrow representing speed and the way the arrow points representing direction.
PLEASE I NEED HELP!
What is the mass of a sample of glass ( specific heat - 0.50J/kg*"C), if it requires 490 J of heat to raise the temperature from 18.0°C to 0.0°C?
Answer:
Q=mc∆tita.
490J= m× 0.5J/Kg/C × (18-0°C)
490J= m × 9J/kg
490J
9J/Kg = m.
m= 54.4Kg
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
**Physical Science
Answer:
B
Good luck! Have a great day!
According to the big-bang theory how the universe might end?
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.
can anyone plz answer this now and give me a right answer?
Answer:
90 degree hope it help :))
Answer:
I think 87 degree
Which list places the layers of the sun in the correct order from outermost to innermost?
A. Corona, chromosphere, photosphere
B. Photosphere, radiative zone, convective zone
C. Convective, chromosphere, corona
D. Radiative zone, corona, convective zone
Please help me. Thank you so much!!!
Answer:
The Sun's layers consist of the following in this order.
1) Corona
2) Transition Region
3) Chromosphere
4) Photosphere
5) Convection Zone
6) Radiative Zone
and last but not least 7) The Core
Hope this helps ;)
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.
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.
what do we mean by principle of conservation?
Answer:
Conservation principles tell us that some quantity, quality, or aspect remains constant through change.
Explanation: