Answers
Answer:
O Tightly packed particles in solids slow down the light waves; however, sound waves make particles bounce into each other, so they travel faster in solids.
Explanation:
In the data the student collected, it showed that when the atmosphere is thicker, it slows down the light. With sound however, the sound travels better in thicker stmosphere or solid, than thin air, or steam.
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Related Questions
which planet has a moon with many sulfur volcanoes?
Answers
Jupiter i hope it is right answer
for each pair of terms below, write a sentence that summarizes how they are different.
thermal conductor, thermal insulator
thermal expansion, thermal contraction
Answers
Answer:
Thermal expansion ,thermal contraction
Explanation:
They are different because it has different cause and chemical reactions
thermal contraction is a chemical reaction
Two balls are dropped from rest and allowed to fall. If one ball is allowed to fall for 1 s and the other for 3 s compare the distances they have fallen.
Answers
The second ball traveled a greater distance when compared to the first ball because the second ball spent more time in motion.
The given parameters;
time of fall of the first ball, t = 1 stime of fall of the second ball, t = 3 sThe distance traveled by each ball is calculated using the second equation of motion as shown below.
The distance traveled by the first ball is calculated as follows;
[tex]h = u_0t + \frac{1}{2} gt^2\\\\h = 0 + \frac{1}{2} gt^2\\\\h = \frac{1}{2} gt^2\\\\h = (0.5\times 9.8\times 1^2)\\\\h = 4.9 \ m[/tex]
The distance traveled by the second ball is calculated as follows;
[tex]h = \frac{1}{2} gt^2\\\\h = (0.5\times 9.8\times 3^2)\\\\h = 44.1\ m[/tex]
Thus, the second ball traveled a greater distance because it spent more time in motion.
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A cheetah has an average velocity of 70 mph. If a cheetah was chasing a water buffalo for 23 miles, how long was the cheetah chasing its prey? (Recall that there are 60 minutes in one hour.)
180 minutes
27 minutes
20 minutes
3 minutes
Answers
Answer:
20 minutes
Explanation:
Create a proportion.
x = time for 23 miles of travel
70 miles/hr = 23 miles/ x
--- Cross Multiply
70x = 23 --- Divide 70 on both sides
x = 0.32857 hrs....
multiply your value of "x" by 60 min/hr in order to convert to minutes
0.32857 hrs * 60min/1hr
hr(s) cancels out
x = 19.7143... ~ 20 mins
A cat falls from a table of height 1.3 m. What is the impact speed of the cat?
O A. 7.5 m/s
O B. 2.5 m/s
O C. 5.0 m/s
O D. 25.5 m/s
SUBMIT
Answers
The impact speed will be
v^2 = 2*9.8*1.3
v^2 = 25.48
v= 5.04 m/s or O C. 5.0 m/s
A bicycle traveled 150 meters west from point A to point B. Then it took the same route and came back to point A. It took a total of 2 minutes for the bicycle to return to point A. Wgat is the average speed and average velocity of the bicycle?
Answers
Answer:
469
Explanation:
90% of people marry there 7th grade love. since u have read this, u will be told good news tonight. if u don't pass this on nine comments your worst week starts now this isn't fake. apparently if u copy and paste this on ten comments in the next ten minutes you will have the best day of your life tomorrow. you will either get kissed or asked out in the next 53 minutes someone will say i love u
What would be the new pressure if 250 cm3 of gas at standard pressure is compressed to a volume of
150 cm3?(
= constant)
V
n
T
Р P.
Initial
Final
Effect
Answers
Answer:
P T V n
Initial: 730 mmHg; 298 K; 250 cm³; --
Final: 760 mmHg; 273 K; ?; --
Effect: ↑; ↓; ↓P ↓T; --
250 cm³ x 273 K/298 K x 730 mmHg/760 mmHg = 220 cm³
Explanation:
If you push on a cart, the force of friction will slow it down. Friction is the conversion of kinetic energy to __________ .
Answers
Answer:thermal energy
Explanation:The friction converts kinetic energy to thermal energy (heat). When two objects are in contact, friction will act with these two objects so this...
Answer:
Heat
Explanation:
Friction always slows a moving object down. ... Friction can be a useful force because it prevents our shoes slipping on the pavement when we walk and stops car tyres skidding on the road. When you walk, friction is caused between the tread on shoes and the ground. This friction acts to grip the ground and prevent sliding.
A 2.6 kg rock is dropped from a height of 10 m. With what speed will it strike the ground. Ignore air resistance. Solve using conservation of energy (start with Ebefore = Eafter).
Answers
Answer:
[tex]mgh = \frac{1}{2} m {v}^{2} \\ v = \sqrt{2gh} \\ = \sqrt{2 \times 9.8 \times 10} \: m. {s}^{ - 1} [/tex]
The statement "are either elements or compounds" describes a
A. pure substance.
B. mixture.
Answers
Answer: A. Pure Substance
Explanation:
If it is pure the substance has to be either an element or a compound.
Answer:
A. pure substance
Explanation:
This is because matter has distinct properties and the ingredients from sample to sample do not change, and all substances are either elements or compounds
Describe What is the shape of a velocity time graph for an object with constant acceleration
Answers
Answer:
An object experiencing constant acceleration would generate a straight line with a positive slope on a velocity-time graph.
I have a backbone and my body is covered with smooth, moist skin. I cannot regulate my own body temperature. I lay eggs in the water to reproduce. What can you infer from the description?The organism is an invertebrate.The organism is a vertebrate and an amphibian.The organism is a vertebrate and a mammal.The organism is a vertebrate and a reptile.
Answers
¿Cómo
se
ajosta
o pondero un error de medicion?
Answers
Answer:
sorry do not speak Spanish so I would not be able to help you probably cannot read this but I would be happy to help you if you follow me and bake English so thank you
An astronaut holds a rock 100m above the surface of Planet X. The rock is then thrown upward with a speed of 15m/s, as shown in the figure. The rock reaches the ground 10s after it is thrown. The atmosphere of Planet X has a negligible effect on the rock when it is in free fall. Determine the acceleration due to gravity on Planet X.
Answers
The acceleration due to gravity of the planet X is 1 m/s².
The given parameters;
height above the ground, h = 100 minitial velocity of the rock, u = 15 m/stime of motion of the rock, t = 10 sThe acceleration due to gravity is calculated as follows;
[tex]h = ut - \frac{1}{2} gt^2\\\\100 = 15(10) - (0.5\times 10^2)g\\\\100 = 150 - 50g\\\\50g = 150-100\\\\50g = 50\\\\g = 1 \ m/s^2[/tex]
Thus, the acceleration due to gravity of the planet X is 1 m/s²
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If the masses are not changed, but the distance of separation is tripled, what happens to the for
Answers
hope this helps, have a great day
mark brainliest :)!!
the kinesis of objects and figures within the frame and of the frame itself are both aspects of ________.
Answers
Hope this answers your question.
A quarter is flipped from a height of 1.45 m above the ground. How much time will it take to reach the ground if the person flipping the coin gave it a velocity of 10.32 m/s? Please answer in seconds and to the third decimal place.
Answers
It will take the quarter 0.151 seconds to reach the ground.
Given the following data:
Height = 1.45 metersInitial velocity = 10.32 m/sWe know that acceleration due to gravity (a) for an object is equal to 9.8 meter per seconds square.
To find how much time it will take the quarter to reach the ground, we would use the second equation of motion.
Mathematically, the second equation of motion is given by the formula;
[tex]S = ut + \frac{1}{2} at^2[/tex]
Where:
S is the height or distance covered. u is the initial velocity. a is the acceleration. t is the time measured in seconds.Substituting the values into the formula, we have;
[tex]1.45 = 10.32(t) + \frac{1}{2} (9.8)t^2\\\\1.45 = 10.32t + 4.9t^2\\\\4.9t^2 + 10.32t - 1.45 = 0[/tex]
The standard form of a quadratic equation is:
[tex]ax^2 + bx + c = 0[/tex]
a = 4.9, b = 10.32 and c = 1.45
We would solve the above quadratic equation by using the quadratic equation formula;
[tex]x = \frac{-b\; \pm \;\sqrt{b^2 - 4ac}}{2a}[/tex]
Substituting the values, we have;
[tex]t = \frac{-10.32\; \pm \;\sqrt{10.32^2\; - \;4(4.9)(1.45)}}{2(4.9)}\\\\t = \frac{-10.32\; \pm \;\sqrt{106.5024\; - \;28.42}}{9.8}\\\\t = \frac{-10.32\; \pm \;\sqrt{78.0824}}{9.8}\\\\t = \frac{-10.32\; \pm \;8.84}{9.8}\\\\t = \frac{-10.32\; + \;8.84}{9.8}\\\\t = \frac{1.48}{9.8}[/tex]
Time, t = 0.151 seconds.
Therefore, it will take the quarter 0.151 seconds to reach the ground.
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does a bike have mechanical advantage that is greater than 1, equal to 1, or less than 1?
Answers
Answer:
equal to 1 i think
Explanation:
A roller skate coming to a stop because of
friction from the floor is an example of which law of
motion?
Answers
Answer:
Laws of the Park: Newton's First Law
If you understand how a skateboard starts and stops, then you already know something about Newton's first law of motion. This law was developed by English scientist Isaac Newton around 1700.
Explanation:
Hope this helps..
why do some science classes teach that electrons, comparatively, have no mass?
helpppp ASAPPP
Answers
Answer:
An electron's mass is only 1/1,836 the mass of a proton. An electron is therefore considered nearly massless in comparison with a proton or a neutron.
HELP ASAP ILL GIVE BRAINLIST
How are translational, rotational, and oscillatory motion used in the design of various robotic assemblies?
Answers
Answer:
Each of the joints represents a degree of freedom in the manipulator system and allows translation and rotary motion :) Hope this helps
A straight line with a positive slope on a velocity-time graph indicates which of the following?
no mo
Answers
Answer:
constant acceleration
Explanation:
I may be wrong, but I'm almost positive cuz I am also taking physics. ;)
Answer:
Constant acceleration in the positive direction.
Explanation:
Because it is a straight line with a positive slope, we can infer that the rate of acceleration remains constant as the line is linear, and as it states in the question, the slope is positive; therefore, it is moving in a positive direction.
Una bola de 60 Kg se hace descender por medio de un cable, con una aceleración hacia abajo de 4 m/s2 . ¿Cuál es la tensión en el cable?
Answers
Answer:
240 N
Explanation:
La fuerza de la tensión del cable es la masa por la aceleración (F=ma).
F = (60)(4) = 240 N
Please solve this in 5 sentences or less. Best answer gets 30 points and brainliest!
Answers
Omg no lol a las autoridades del ytyyyyy y a la policía y no se puede llegar al aeropuerto a las que no cause he estado en el hospital no
The combination of a particle's mass and velocity produces momentum. Momentum is a vector quantity that has both magnitude and direction. The force exerted on a particle is equated to the time rate of change of momentum by Isaac Newton's second equation of motion.
What is Newton's Law of motion?First law of Newton : According to Newton's first law of motion, if a body is at rest or moving in a straight path at a constant speed, it will stay in that state or continue to move in that direction unless it is acted upon by an outside force.
Second law of Newton : According to Newton's second rule of motion, a body's rate of momentum change is inversely proportional to the force acting on it, and momentum changes occur in the direction of the net applied force.
Third law of Newton : Newton's third law of motion states that there is always an equal and opposite reaction to every action.
In order to accomplish work and to produce heat and light, energy must be transferred to a body or to a physical system. Energy is the quantitative attribute that does this.
A push or pull that an object experiences as a result of its interactions with its environment is known as a force.
Dust and smoke rising in the atmosphere as a result of an asteroid impact hinder sunlight from reaching our planet, resulting in a decrease in global temperature. Many living beings could die as a result of this incident. A small city might be destroyed if an asteroid the size of an apartment strikes Earth. A 20-story building-sized asteroid might wipe out a small nation if it were to strike Earth.
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In which of the following cases of motions, the distance moved and the magnitude of the displacement are equal?
If the car is moving on a straight road
If the car is moving in circular path
The pendulum is moving to and fro
The earth is moving around the sun
Answers
Answer:
answer is number (a) If the car is moving on a straight road....
Explanation:
The distance moved and magnitude of displacement are equal only in the case of motion along a straight line. Because displacement is the shortest path between initial and find path. So, for car moving on straight road, distance moved and magnitude of displacement are equal.
10. Which country creates the most waste per person? (1 point)
O Germany
O Sweden
United States
O United Kingdom
Finish Cancel
Answers
Answer:
United states creates the most waste per person
A current of 0.2 A flows through a conductor for 5minutes. How much charge would have passed through the conductor?
Answers
As we know,
[tex]electric \: \: current = \dfrac{charge}{time} [/tex]
so, let's solve for charge (q) :
time = 5 minutes = 5 × 60 seconds = 300 seconds.
[tex]0.2 = \dfrac{q}{300} [/tex][tex]q = 300 \times 0.2[/tex][tex]q = 60[/tex]hence, the charge = 60 coulombs (C)
Guys please help me on the rest of the numbers
Answers
Answer:
C. 100
D.3
E. 33.3
Explanation:
C. Mechanical Advantage=Load / Effort
= 200N
--------
100N
Therefore,. = 100
D. I. Velocity Ratio= distance moved by the effort / distance moved by load
= 30cm/10cm
= 3
II. Efficiency= M.A / V.R
= 100/3
= 33.33
how do the coils impact the strength of the magnetic fieldhow do the coils impact the strength of the magnetic field
Answers
Un avión vuela hacia al norte a una velocidad de 90 m/s, pero un fuerte viento sopla hacia al este a 20 m/s y desvía su rumbo. Realiza los trazos y encuentra el vector resultante.
Answers
La adicion de vectores permite encontrar la repuesta para la velocidad resultante del avión es:
Modulo de la veloicdad v= 92,2 m/s Dirección de esta veloicdad 12,5º al Norte del Este
Las magnitudes vectoriales son cantidades tienen modulo y dirección, la velocidad es una de estas magnitudes, por lo tanto deben ser sumada usando álgebra vectorial.
Un sistema de referencia es un sistema desde donde realizar las mediciones, en este caso indican que usemos un sistema de los puntos cardinales.
En el adjunto podemos ver un esquema de los vectores velocidad y su resultante, realicemos el calculo de la resultante por método analíticos
Indican que el valor de la velocidad hacia el Este es vₓ = 20 m/s y la velocidad hacia el Norte es v_y = 90 m/s, por lo tanto, para la magnitud usamos el Teorema de Pitágoras
[tex]R= \sqrt{v_x^2 + v_y^2}[/tex]
R = [tex]\sqrt{20^2 + 90^2}[/tex]
R = 92,2 m/s
Para encontrar la direccion usemos trigonometría
tan θ = [tex]\frac{v_y}{v_x}[/tex]
θ = tan⁻¹ [tex]\frac{v_y}{v_x}[/tex]
θ = tan⁻¹ 20/90
θ = 12,5º
La dirección se lee 12,5º al Norte del Este
En conclusión usando la suma de vectores podemos encontrar la repuesta para la velocidad resultante del avión es:
v= 92,2 m/s con dirección 12,5º al Norte del EsteAprender mas aquí:
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