Answer:
lolol lolol lolol lolol lolol lolol 65
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.
ist Law of Thermodynamics
Question 2 of 10
What is the change in internal energy if 20 J of heat is released from a system
and the system does 50 J of work on the surroundings?
Use AU = Q-W.
A. 30 J
B. 70 J
C. 30 J
D. -70J
Answer:
Change in heat energy = -30 J
Explanation:
Given:
AU = Q-W
Heat energy Q = 20 J
Work done W = 50 J
Find:
Change in heat energy
Computation:
Change in heat energy = 20 J - 50 J
Change in heat energy = -30 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:
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
what if you were a mother for a day boys and girls
4. What property of metals make them good conductors of heat?
Answer:
Their mobile electrons
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
Answer:
C
Explanation:
I think that's it. dont know if that's rogue
Answer:
c
Explanation:
i dont know
just felt
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
Potential energy is related to the speed of an object.
True or False
Answer:
False
Explanation:
Potential energy is stored energy, so it is not in motion. Kinetic energy is the energy in motion.
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
A copper coin resting on a piece of cardboard is placed on a beaker as shown in the diagram below. When the cardboard is rapidly removed, the coin drops into the beaker. The two properties of the coin which best explain its fall are its weight and its-
A: Temperature
B: Density
C: Volume
D: Inertia
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.
Si una bala de 122 g que viaja a 350 m/s golpea a un policía con chaleco antibalas el cual soporta 120 J de energía, ¿la bala atraviesa o no el chaleco? Explicar brevemente.
Answer:
Puesto que la energia cinética traslacional es mucho mayor que la capacidad del chaleco antibalas, la bala atravesaría el chaleco antibalas.
Explanation:
Un chaleco antibalas soporta el disparo de una bala disipando la energía de esta última a través de su propio material. Si sabemos que el chaleco antibalas soporta 120 joules de energía, cabe saber si la energía cinética traslacional es igual o inferior a ese límite, significando que la bala no atravesaría el chaleco.
La energía cinética traslacional de la bala ([tex]K[/tex]), in joules, queda expresada con la siguiente fórmula:
[tex]K = \frac{1}{2}\cdot m\cdot v^{2}[/tex] (1)
Donde:
[tex]m[/tex] - Masa de la bala, en kilogramos.
[tex]v[/tex] - Rapidez de la bala, en metros por segundo.
Si sabemos que [tex]m = 0.122\,kg[/tex] y [tex]v = 350\,\frac{m}{s}[/tex], entonces la energía cinética traslacional de la bala es:
[tex]K = 7472.5\,J[/tex]
Puesto que la energia cinética traslacional es mucho mayor que la capacidad del chaleco antibalas, la bala atravesaría el chaleco antibalas.
After students complete a scientific investigation, why is it important for the class to discuss the results obtained by each lab group?
A. Discussion of an investigation allow students to change data so that it matches the initial hypothesis.
B. Discussion of an investigation allow students to better understand methods and conclusions.
C. Discussion of an investigation allow students to select the best data and discard the rest.
D. Discussion of an investigation allows students find errors and change results.
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.
For more information on Earthquakes see
https://brainly.ph/question/910216
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.
Three materials, put them in order of what
light does when it hits them.
clay, shiny dimes, eyeglasses
Answer:
it's a
Explanation:
hope this helps!!!!!!
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:
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.
what us the motion? and what type of force did it experienced
Answer:
hi
Explanation:
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.
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
How many months does it take for the sun to go around earth?
Answer:
Well, 365 days is about how long it takes for Earth to orbit all the way around the Sun one time.
Many sources of energy such as nuclear, coal, and oil use a fuel source to turn water into steam. The steam is then used to turn a turbine and generate electricity. Why are these sources not very efficient?
Coal, and oil are fossil fuels they are non - renewable. Nuclear sources are alo non renewable energy since they are unstable and hazardous to the environment and thus are difficult to manage for an efficient energy generation.
What are renewable energy sources?Renewable energy sources are those which can reproduced and will be long lasting over time. Whereas non renewable resources like fossil fuels and nuclear sources are not at all recycled. Moreover they causes harmful effects to the environment.
Waste from coal or natural gas production necessitates the use of surplus energy and environmental mitigation. Considering these variables, it is evident that coal's overall usable energy efficiency is just 29% of its initial energy value.
Solar energy is the better alternative as a renewable energy source.Wind, on the other hand, rates at 50% efficiency. Wind energy sometimes has a higher efficiency than this %. And using wind energy doesn't produce any pollution as solar energy.
To find more on renewable energy, refer here:
https://brainly.com/question/17373437
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can anyone plz answer this now and give me a right answer?
Answer:
90 degree hope it help :))
Answer:
I think 87 degree
Comets are typically ?
a.) chunks of ice that begin to vaporize if they pass close to the sun.
b.) slushy mixtures of liquid and ice.
c.) gaseous bodies from which some of the gas is pushed out by the sun to form a long tail.
d.) chunks of rock that are generally a few tens of kilometers in diameter.
??? i appreciate those that help!!! <3
p.s. this subject is astronomy it just doesnt have it as a subject option nor a science option....
Answer:
the answer is a) chunks of ice that begin to vaporized if they pass close to the sun
What is the speed of a shark that traveled 15 miles in 1 hour
Soln_
T = 1 hrs × 15 mils
=60 × 15
=900 ans#
For an investigation, a student measures the speed of a cart as it rolls down a ramp. The student then records data in the table shown above. Which of these best explains the student’s data?
A.
The speed of the cart decreases as the cart rolls down the ramp because of friction between the cart and the ramp.
B.
The speed of the cart increases as the cart rolls down the ramp because the force acting on the cart is greater than the force of gravity.
C.
The speed of the cart increases as the cart rolls down the ramp because the forces acting on the cart are unbalanced.
D.
The speed of the cart decreases as the cart rolls down the ramp because the forces acting on the cart are balanced.
Answer: it’s c
Explanation:I put that as my answer for an assignment and got it right
The correct option is the speed of the cart increases as the cart rolls down the ramp because the forces acting on the cart are unbalanced.
What is force?The push or pull on a mass-containing item changes its velocity. An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude.
Given that in the question there is a child who is doing experiment for an investigation, a student measures the speed of a cart as it rolls down a ramp. The student then records data in the table given in question we see that speed increases as cart goes down.
The speed of the cart increases as the cart rolls down the ramp because the forces acting on the cart are unbalanced.
To learn more about force refer to the link:
brainly.com/question/13191643
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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.
Explain how height, acceleration, and speed would affect the movement of a roller coaster.
Answer:
height affects the acceleration, which means it could go faster at the end of the slope since it got more distance to travel. acceleration could affect the speed of the roller coaster because it will go faster as it approaches the end of the slope and speed can affect the height it reaches because the faster it goes, the more distance it can travel before reaching to a stop.
Explanation: