Which statement describes the transmission of mechanical waves?(1 point)
They cannot travel through matter nor in a vacuum.
They can travel through matter, but not in a vacuum.
They cannot travel through matter, but they can in a vacuum.
They can travel through matter and in a vacuum.
Answer:
They can travel through matter, but not in a vacuum.
Explanation:
The best statement that describes the transmission of mechanical waves is that they can travel through matter but not in a vacuum.
Mechanical waves require a material medium for their propagation. In the absence of such medium they are not transmitted. Examples are seismic waves, sound waves, water waves e.t.c
A type of wave than can be transmitted through a vacuum and through matter are the electromagnetic waves.
Answer:
it is option B. they are correct
Select the correct answer. Which of the following is a category of dance? O A. Group dance OB. Solo dance O C. Partner dance OD. All of the above. NEED HELP PLEASE! Due today!!!!!!!!!!!
Answer:
all of above I think sorry if I'm not right but I tried
Answer: d
Explanation:
If you push or pull an object,the object gains energy. True or False
Answer:
True
its giving an object that has potential energy, kinetic energy.
Explanation:
What is the mass of solid dissolved per unit volume of liquid called?
Answer:
I belive the awnser to this question is density.
which wave lies adjacent to the low frequency portion of the visible spectrum
a. gamma rays
b. infrared
c. x rays
d. ultraviolet rays
Answer: b. infrared
Explanation:
The visible light with the smaller frequency is associated with the color red.
While the blue is the one with the larger frequency.
Now, as the name says, infrared waves are the ones with a frequency just below the one of the red visible light.
Where the frequency of the red light is something around (4.3*10^14 Hz)
and the frequency of the infrared waves is in the range between (10^12 Hz and 10^14 Hz)
Then the correct option is b, infrared.
Which can be used as a lever ?
A. a black tire
B. a long board
C. a large ball
D a piece of paper
the tempreature change from 237K to 283K
what is the change in tempreature in celsius and fahrenhite scale ?
PLZ HELP! WILL MARK BRAINIEST IF CORRECT
Solve for potential energy and kinetic energy. It's circled.
Explanation:
KE = 0.5mv² = 0.5(50kg)(8.97m/s)² = 2,009.5J.
PE = mgh = (50kg)(9.81N/kg)(1m) = 490.5J.
You can see that the total mechanical energy (ME) is the sum
A 1400 kg car has an engine that exerts 9800 N of force. If the force of friction between the car and the road is roughly 2801 N, what is the car's acceleration?
Friction opposes the force provided by the car's engine, so by Newton's second law the acceleration a is such that
∑ F = 9800 N - 2801 N = (1400 kg) a
a = (6999 N) / (1400 kg) ≈ 5.0 m/s²
You toss a ball straight upward, in a positive direction. The ball falls freely under the influence of gravity. At the highest point in the ball's motion.
A.) its velocity is zero and its acceleration is positive (upward).
B.) its velocity is zero and its acceleration is negative (downward).
C.) its velocity is positive (upward) and its acceleration is zero.
D.) its velocity is zero and its acceleration is zero.
Answer:
B.) its velocity is zero and its acceleration is negative (downward).
Explanation:
When the ball is thrown upwards in the air, the ball starts with its velocity being high and positive upwards against the force of gravity. Due to force of gravity pulling the object to the center of the earth, its velocity decreases as it reaches the maximum height where the velocity is instantaneously zero. At this maximum height its acceleration is -9.81 m/s².
At the highest point in the ball's motion, its velocity is zero and its acceleration is negative (downward).
All objects within the earth's gravitational field are affected by the force of gravity. Gravity is the reason why objects fall to the ground when they are thrown upwards.
If you toss a ball upward, the ball will fall freely under the influence of gravity. At the highest point in the ball's motion, its velocity is zero and its acceleration is negative (downward).
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A gas station is charging $1.29 per gallon of gas. What would be the price for a liter of gas?
Answer: $0.343/liter
Explanation: $1.29/gallon x 1 gallon/3.78541 liters = $0.343/liter
An arrow of 43 g moving at 84 m/s to the right, strikes an apple at rest. The arrow sticks to the apple and both travel at 16.8 m/s after impact. What is the mass of the apple?
(Plz help ASAP!!! I will give you 50 points)
Answer:
The mass of the apple is 0.172 kg (172 g)
Explanation:
The Law Of Conservation Of Linear Momentum
The total momentum of a system of bodies is conserved unless an external force is applied to it. The formula for the momentum of a body with mass m and speed v is
P=mv.
If we have a system of two bodies, then the total momentum is the sum of both momentums:
[tex]P=m_1v_1+m_2v_2[/tex]
If a collision occurs and the velocities change to v', the final momentum is:
[tex]P'=m_1v'_1+m_2v'_2[/tex]
Since the total momentum is conserved, then:
P = P'
Or, equivalently:
[tex]m_1v_1+m_2v_2=m_1v'_1+m_2v'_2[/tex]
If both masses stick together after the collision at a common speed v', then:
[tex]m_1v_1+m_2v_2=(m_1+m_2)v'[/tex]
We are given the mass of an arrow m1=43 g = 0.043 kg traveling at v1=84 m/s to the right (positive direction). It strikes an apple of unknown mass m2 originally at rest (v2=0). The common speed after they collide is v'=16.8 m/s.
We need to solve the last equation for m2:
[tex]m_2v_2-m_2v'=m_1v'-m_1v_1[/tex]
Factoring m2 and m1:
[tex]m_2(v_2-v')=m_1(v'-v_1)[/tex]
Solving:
[tex]\displaystyle m_2=\frac{m_1(v'-v_1)}{v_2-v'}[/tex]
Substituting:
[tex]\displaystyle m_2=\frac{0.043(16.8-84)}{0-16.8}[/tex]
[tex]\displaystyle m_2=\frac{-2.8896}{-16.8}[/tex]
[tex]\displaystyle m_2=0.172\ kg[/tex]
The mass of the apple is 0.172 kg (172 g)
Un globo sonda de 155 L de volumen a 1 atm se deja subir a una altura de 6 Km, donde la presión es de 0,8 amt. Suponiendo que la temperatura permanece constante, ¿Cuál es el volumen final del globo?
Answer:
El volumen final del globo es 193.75 L.
Explanation:
La ley de Boyle establece que “El volumen ocupado por una determinada masa gaseosa a temperatura constante, es inversamente proporcional a la presión”
La ley de Boyle se expresa matemáticamente como: P*V=k donde k es una constante.
En esta ley entonces se relacionan dos variables: presión y volumen, por lo que se asume que la temperatura del gas y el número de moléculas del gas son contantes.
Ahora es posible suponer que tienes un cierto volumen de gas V1 que se encuentra a una presión P1 al comienzo del experimento. Si varias el volumen de gas hasta un nuevo valor V2, entonces la presión cambiará a P2, y se cumplirá:
P1*V1=P2*V2
En este caso:
P1= 1 atmV1= 155 LP2= 0.8 atmV2= ?Reemplazando:
1 atm* 155 L=0.8 atm*V2
y resolviendo se obtiene:
[tex]V2=\frac{1 atm*155 L}{0.8 atm}[/tex]
V2= 193.75 L
El volumen final del globo es 193.75 L.
As volume increases, pressure_______________________?
Easy points
Answer:
•Each time they collide with the walls they exert a force on them. More collisions mean more force, so the pressure will increase. When the volume decreases, the pressure increases. This shows that the pressure of a gas is inversely proportional to its volume.
Boyle’s law
Decreasing the volume of a gas increases the pressure of the gas. An example of this is when a gas is trapped in a cylinder by a piston. If the piston is pushed in, the gas particles will have less room to move as the volume the gas occupies has been decreased.
A piston closes the end of a cylinder with some gas molecules inside. The pressure applied to the piston is doubled and the volume inside the cylinder halfs.
As the pressure applied to a piston is doubled, the volume inside a cylinder is halved
Because the volume has decreased, the particles will collide more frequently with the walls of the container. Each time they collide with the walls they exert a force on them. More collisions mean more force, so the pressure will increase.
When the volume decreases, the pressure increases. This shows that the pressure of a gas is inversely proportional to its volume.
This is shown by the following equation - which is often called Boyle’s law. It is named after 17th century scientist Robert Boyle.
P1V1 = P2V2
where:
P1 is the initial pressure
V1 is the initial volume
P2 is the final pressure
V2 is the final volume
It can also be written as:
pressure1 × volume1 = pressure2 × volume2
Note that volume is measured in metres cubed (m3) and temperature in kelvin (K).
It means that for a gas at a constant temperature, pressure × volume is also constant. So increasing pressure from pressure1 to pressure2 means that volume1 will change to volume2, providing the temperature remains constant.
Why is using a slinky not a perfect model for how seismic waves travel through earth?
Answer:
because the earth is more consistent and while you use a slinky your hand moving it is not very controlled
if your mass on earth is 100.0 kg what is your mass on jupider, where the force of gravity is approximately 2.5 that of earth?
a. 100.0 kg
b. 2500 kg
c. 25 kg
d. 40 kg
Answer:
a. 100.0 kg
Explanation:
Given parameters:
Mass = 100kg
Force of gravity = 2.5m/s²
Unknown:
mass on Jupiter = ?
Solution:
The mass of a substance is the quantity of matter such body possess. Mass is the same.
So, the mass of earth and on Jupiter is the same.
Only the weight of the object will differ since weight is contingent on the force of gravity from places to places.
My mass on Jupiter will still be 100kg
2 points
15) A 5.0 kg bowling ball moving at 4.0 m/s is caught by 60.0 kg Frodo.
Frodo is initially at rest on frictionless roller skates. How much
MOMENTUM does the bowling ball have BEFORE it is caught? *
Answer:
The initial momentum of the bowling ball is 20 kgm/s.
Explanation:
Given;
mass of the bowling ball, m₁ = 5.0 kg
initial velocity of the bowling ball, u₁ = 4.0 m/s
mass of the Frodo, m₂ = 60 kg
initial velocity of Frodo, u₂ = 0
The initial momentum of the bowling ball is calculated as;
P = m₁u₁
P = 5 x 4
P = 20 kgm/s
Therefore, the initial momentum of the bowling ball is 20 kgm/s.
What kind of waves occur when the motion of the medium is parallel the the wave direction
Answer:
A longitudinal wave is a wave in which particles of the medium move in a direction parallel to the direction that the wave moves.
Explanation:
hope this helped
an 80kg skier has a force of 200n exerted on him down the slope
calculate his acceleration down the slope
Water has a density of 1000 kg/m3. A piece of rubber has a density
of 1024 kg/m3. Explain what would happen if the rubber was put in
a pool of water?
Explanation:
if the rubber was put in a pool of water then the rubber sinks in water because the density of rubber (1024 kg/m³) Is more than that of water (100 kg/m³) . As we know if the density is greater than water then the substance sinks in water.
Hope it will help :)
Which type of characteristics can be inherited?
Answer:
Characteristics that can be inherited is hair color or muscle structure.
ANSWER ASAP GIVING BRAINLIEST FIVE STARS AND A HEART!
As sound waves move throughout a medium the particles from it vibrate in different directions.
Answer:
Sound waves in air (and any fluid medium) are longitudinal waves because particles of the medium through which the sound is transported vibrate parallel to the direction that the sound wave moves. A vibrating string can create longitudinal waves as depicted in the animation below.
PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP. I NEED TO GIVE THIS IN!!!!!
Answer:
a)Acceleration increases proportionally
b)If you increase the mass at a given force the rate of acceleration slows.
HELP me now what is the meaning of the word scalars and vectors
Answer:
Scalars are quantities that are fully described by a magnitude (or numerical value) alone. Vectors are quantities that are fully described by both a magnitude and a direction.
Which device uses a rotating electric power source to produce a magnetic field?
A. a motor
B. A step-up transformer
C. A step-down transformer
D. A generator
Answer:
A. a motor
Explanation:
A motor is an electrical device or machine that converts electrical energy into mechanical energy. That is, a motor takes electrical energy to produce motion. There are different types of motors such as DC motor, induction motor and so on.
When electrical current flows through a coil, a magnetic flux is been produced, therefore when a rotating power source is supplied to coil of a motor, a magnetic field is produced which causes torque.
Answer:
A: Motor.
Explanation:
It’ll be a motor because motors use rotating electric power sources to produce magnetic fields.
What is the relationship between the magnetic and electric fields along the
path of a moving electromagnetic wave?
O A. The angle between them varies as the wave moves.
B. They form a right angle with each other.
148
C. They form a 180° angle with each other.
D. They vibrate at different times.
Answer:
B Other guy said D and it was wrong but the correct answer is B have a good day
Explanation:
Magnetic and electric fields form a right angle with each other along the
path of a moving electromagnetic wave.
What is electromagnetic wave?The oscillations between an electric field and a magnetic field produce waves known as electromagnetic waves, or EM waves. In other words, magnetic and electric fields oscillate to form electromagnetic (EM) waves.
When an electric field interacts with a magnetic field, electromagnetic waves are created. Therefore, they are referred to as "electromagnetic" waves. An electromagnetic wave's electric field and magnetic field are perpendicular to one another (at right angles). Additionally, they are perpendicular to the EM wave's direction.
In vacuum, EM waves move at a fixed speed of 3.00 x 10⁸ m/s. Neither the magnetic field nor the electric field can deflect them. They can, however, exhibit diffraction or interference.
In electromagnetic wave the magnetic and electric fields form a right angle with each other along the path of a moving electromagnetic wave.
Learn more about electromagnetic waves here:
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how much power is requiered to do 100j of work on time of 0.5 seconds
Answer:
200 w
Explanation:
p= w/t= 100 j/ 0.5 s= 200 w
Answer:
Answer is 200 W
Explanation:
p= w/t= 100 j/ 0.5 s= 200 w
what ideas do you have a bout why different places have lower or higher rates of skin cancer?
Answer: Some places like Florida and California are both very hot and dry places, the sun damages your skin more in sunny places then in colder more breezy places.
Explanation:
PLEASE HELP!!
Find the change in temperature of each sample after the hot water was added. Fill in the table with the data you collected
in parts C and D. To find the change in a sample's temperature, subtract the starting temperature from the ending
temperature.
Answer:
Sample Starting Temperature Ending Temperature Change in Temperature
50 g sand
50 g water
100 g water
Explanation:
Its
20C
32C
46C
Answer:
Explanation:
Why would it probably be very difficult to determine the chemical and physical properties of a newly discovered synthetic element?
a.
The element would not fit in the periodic table.
b.
The element’s nuclei would break apart very quickly.
c.
The element would combine the properties of the nuclei from which it was made.
d.
The element would lack many properties of ordinary elements.
the answer is c
Explanation:
