Answer:
lf you drop an object and it hasn't been able to attain a significant fraction of it's terminal velocity by the time it hits the ground or whatever other event ends your experiment then you can ignore air resistance
After pulling the string tight, Miguel talked into his aluminum can. Brian could hear Miguel's voice through the aluminum can attached to the string. Which of the following best explains the sound Miguel made?
A.
The sound traveled through the air but not through the string.
B.
The sound traveled through the string but not through the air.
C.
The sound traveled through the string and the air at different speeds.
D.
The sound traveled through the string and the air at the same speeds.
Answer:
option C is correct✅✅✅✅✅
...............
Find the correct statement
The disturbance created by a source of sound in the medium do not travels through the medium but the particles of the medium does.
The disturbance created by a source of sound in the medium travels through the medium and not the particles of the medium
The particles and the disturbance created by a source of sound in the medium do not travels through the medium
The disturbance created by a source of sound in the medium travels through the medium along with the particles of the medium
Answer:The disturbance created by a source of sound in the medium travels through the medium and not the particles of the medium
Explanation:i hope this is right
The maximum range of projectle is R° if projected at angle of 45°. It'll be 300% of Range of projectile if projected at angle? a) 30° b) 45° c) 60° d) 76° Correct answer with good explanation
Answer:
The maximum range is 300% of the range of the projectile is projected at an angle of 9.74°.
None of the options are correct.
Explanation:
Normally, ignoring air resistance, for projectile motion, the range (horizontal distance travelled) of the motion is given as
R = (u² sin 2θ)/g
where
u = initial velocity of the projectile
θ = angle above the horizontal at which the projectile was launched
g = acceleration due to gravity = 9.8 m/s²
The range is maximum when θ = 45°
R when θ = 45° is
R = (u² sin 90°)/g = (u²/g)
We are then told that this maximum range is 300% of the value obtainable for the range at a particular angle
Maximum range = 3R
(u²/g) = 3(u² sin 2θ)/g
Sin 2θ = (1/3)
2θ = sin⁻¹ (1/3) = 19.47°
θ = (19.47°/2) = 9.74°
Hope this Helps!!!
8. A sprinter on a school track team is running north at a velocity of 6.0 m/s. After 5.0 s, she
is running south at 4.0 m/s. Calculate the average acceleration for this interval.
Answer:
acc. = 4-(-6) /5= 10/5=2 m/s^2
A ray of light strikes a plane mirror at an angle of incidence 35°. If the mirror is rotated through 10°.
i. what is the angle of reflection before rotating the mirror?
ii. through what angle is the reflected ray rotated?
iii. what is the angle between the incidence ray and the new reflected ray?
Answer:
1 35°
2 20°
3 50°
..............
A+block+of+1.2kg+is+placed+on+an+included+plane+at+60°+to+the+horizontal.+Calculate.+a.The+force+that+will+make+the+block+to+slide+down+the+plane.B.The+coefficient+of+friction+.C.+The+normal+reaction+d.+The+friction+force
Answer:
a. 10.2 N b. 1.73 c. 58.8 N d. 10.2 N
Explanation:
a. The force that will make the block slide down the plane
This is the component of the block's weight along the plane F = mgsinθ where m = mass of block = 1.2 kg, g = 9.8 m/s² and θ = angle of incline = 60°.
So, F = mgsinθ = 1.2 kg × 9.8 m/s² × sin60°.= 10.18 N ≅ 10.2 N
b. The coefficient of friction
The coefficient of friction, μ = tanθ = tan60° = 1.73
c. The normal reaction.
This is equal to the vertical component of the block's weight. So, F = mgcosθ. Substituting the values for the variables from above, we have
F = mgcosθ = 1.2 kg × 9.8 m/s² × cos60°.= 58.8 N
d. The frictional force
Since the block does not slide, there is no net force on it. If f is the frictional force, then
F - f = ma. Since a = acceleration = 0,
F - f = 0
f = F = mgsinθ = 1.2 kg × 9.8 m/s² × sin60°.= 10.18 N ≅ 10.2 N
Besides a rope, what other kinds of waves move as transverse waves?
Answer:
ocean waves and ripples from a stone being thrown in a pond.
Explanation:
Please help me this question
2. The diagram below shows two marbles moving in opposite direction with
speeds as shown.
(a) If the velocity of the 30.0g marble after collision is 0.1m/s to the left
What is the velocity of the 10.0g marble after collision?
(b)Calculate the kinetic energy before and after collision, hence deduce the
value of the kinetic energy lost.
Answer:
THE DIAGRAM ISNT LOADING HOW DO I HELP YOU
Explanation:
Se debe usar una rampa de 5 m para elevar muebles que pesen 490 N hasta una plataforma a una altura de 2 m. Su propuesta de que la eficiencia de la rampa es del 100%, ¿cuál debe ser la fuerza requerida para levantar cada mueble en la rampa?
Answer:
F = 180 N
Explanation:
To find the required force you first calculate the angle of the ramp, by using the following relation:
[tex]sin\theta=\frac{2m}{5m}=0.4\\\\\theta=sin^{-1}(0.4)=23.57\°[/tex]
Next, you use the Newton second law to know what is the x component (in a rotated coordinate system) of the gravitational force:
[tex]F_x=mgsin\theta[/tex]
the required force must be, at least, the last force Fx. You know that the weight of the object is 490N = mg. Hence, you have:
[tex]F=F_x=(450N)sin(23.57\°)=180N[/tex]
the required force is 180N
- - - - - - - - - - - - - - - - - - - - - - - -
TRANSLATION:
Para encontrar la fuerza requerida, primero calcule el ángulo de la rampa, utilizando la siguiente relación:
Luego, usa la segunda ley de Newton para saber cuál es el componente x (en un sistema de coordenadas girado) de la fuerza gravitacional:
la fuerza requerida debe ser, al menos, la última fuerza Fx. Sabes que el peso del objeto es 490N = mg. Por lo tanto, tienes:
The beginning of a river is called the
mouth
source
watershed
tributary
Answer:
head of water or mouth
Explanation:
hope this helpsAnswer:
The beginning of a river is called the source.
Explanation:
I got this correct on oddyseyware
In which direction does the magnetic field in the center of the coil point ?
Answer:
Answer:
from right
Explanation:
right
Answer:
Left
Explanation:
Finger Grasp Process thingy
How do satellites stay in orbit?
Answer:A satellite maintains its orbit by balancing two factors its velocity the speed it takes to travel in a straight line and the gravitational pull that Earth has on it. A satellite orbiting closer to the Earth requires more velocity to resist the stronger gravitational pull.
Explanation:
Answer: The earth's gravity keeps it in orbit. The satellite's velocity keeps it moving.
2. Two children play a game of catch, running back and forth to catch each throw from the other. Assume the children are standing 5m apart with one child standing at the origin before the game begins.
The ball makes the following motions:
5 meters right, 8 meters left, 3 meters right, 6 meters left, 15 meters right, and 4 meters left.
Part A:
Calculate the total distance traveled by the child on the left.
Part B:
Calculate the total displacement of the child on the right.
Answer:
Part A: 24 m
Part B: 9 m
Explanation:
Part A:
The children takes turns so the child on the left moves with when the ball moves 5 meters right, 3 meters right, 15 meters right, while the child on the right moves with when the ball moves 8 meters left, 6 meters left, 4 meters left
The total distance traveled by the child on the left is given by the relation;
Initial position of the child on the left = 5 m
First motion of the child on the left = Distance to origin + first distance ball moved
∴ First motion of the child on the left = 5 + 5 = 10 m location of child = 5 m left
Second motion of the child on the left = location of child - position of the ball = 5 - (5 - 8 + 3) = 5 m left location of the child = 0 m
Third motion of the child on the left = location of child - position of the ball = 0 - (6 - 15) = 9 m right
Total distance traveled by the child on the left = 10 + 5 + 9 = 24 m
Part B:
First motion of the child on the right = Distance of child to origin + second position of ball
Initial location of the child on the right = 0 m
∴ First motion of the child on the right = 0 + (5 - 8) = -3 m location of child = 3 m left
Second motion of the child on the right = location of child - current position of the ball = 3 - 6 = -3 m left location of the child = -6 m
Third motion of the child on the right = location of child - position of the ball = -6 - 5 = 11 m right
Final location of the child on the right = 9 m right
Total displacement of the child on the right = Final location of the child on the right - Initial location of the child on the right 9 - 0 = 9 m.
ASSIGNMENT
1. A resistance of 6ohms is connected in series with another of 3ohms. If a potential difference of 9V is applied across the combination, what is the p.d. across the 6ohms resistance.
Answer:
Equivalent resistance in series = 6 + 3 = 9 ohms
Current = V/R (ohm's law)
Current = 9/9 = 1 A
P.D. across 6 ohms = IR (ohm's law)
= 1A × 6Ω = 6V
velocity is a vector quantity, and speed is a scalar quantity. The speed of a car is 20 m/s. What other information do you need in order to know the velocity of the car ?
Answer:
Direction
Explanation:
Speed is a scalar quantity, that is, it has only magnitude
While velocity is a vector quantity, which has both direction and magnitude.
Velocity is also called speed with direction.
Hence, we need to know the direction in which the car is moving in order to know the velocity.
what is the difference between an ordinary piece of iron and iron magnet?
Answer:
The difference between a piece of ordinary iron and an iron magnet is. The magnetic domains in an iron nail that is brought near a strong magnet. When an ordinary iron nail is removed from a strong magnet
Explanation:
the lambda baryon has the quark composition uds. which particle has the same electric charge as the lambda baryon?
Answer:
A particle that has the same charge as lambda baryon is a neutron.
Explanation:
A lambda baryon is a subatomic particle that is made up of three quarks - uds (up, down and strange). It contains the same number of protons and neutrons, and an isotopic spin of 1. It is a family of hadrons just like mesons.
A quark is a fundamental or basic particle that make up a matter. It can combine with two or more to form composite particles (e.g neutron or proton). These basic particles are held by a very strong attractive force. The composite particles are the constituents of the nucleus of an atom.
The particle that has the same electric charge as the lambda baryon is neutron.
What quarks as seen in Lambda?The lambda is known to be a baryon that is composed of three quarks. They are:
An upA down A strange quarkThe neutron is known to be a kind of subatomic particle that is often written as n or n⁰ . It is known to have a neutral charge and its composition is that of 1 up quark and 2 down quarks.
See full question below
The lambda baryon has the quark composition uds. Which particle has the same electric charge as the lambda baryon?
1. neutron
2 electron
3. proton
4 antimuon
Learn more about electric charge from
https://brainly.com/question/1487561
as a car drives past a person standing on a sidewalk, the driver keeps a hand on the horn. how does the pitch of the horn differ for the driver and the person standing on the sidewalk?
Answer:
While the car is going towards the standing person on the sidewalk he is listening the pitch of the horn higher then it is.
When the car passes the person on the sidewalk and goes away, the horn's pitch become lower (for the person standing on the sidewalk).
For the driver, the pitch is always the same.
Explanation:
Is the doppler effect.
When the car is approaching, the sound waves must travel a smaller space than the previous one and they take less time to reach the standing person. So, sound waves reach the standing person with a higher frequency.
It happens the opposite when the car is going away: the sound waves need to travel more space and take more time to reach the person on the sidewalk. So, the frequency of the waves is lower.
How do we determine the age of rocks and other geologic features?
Answer:To establish the age of a rock or a fossil, researchers use some type of clock to determine the date it was formed. Geologists commonly use radiometric dating methods, based on the natural radioactive decay of certain elements such as potassium and carbon, as reliable clocks to date ancient events.
Explanation:
A spring is 14cm long. Three masses are hung from it and then it is measured again. Now it is 19.5cm long. What force did the three masses provide? The spring constant for the spring is 30N/m.
Answer:
Gravity
Explanation:
The answer is gravity because when the 3 masses were hung from the spring, gravity pulled the spring towards the ground.
The distance between Earth and the Moon was determined by measuring the time it took for light waves from Earth to travel to the Moon and back. Why was it not possible to use sound waves for this experiment?
Answer: there is no sound in space
Explanation: there is no vacum in space for sound to travel, therfore no sound waves
Astronomers are comparing two stars that are known to have the same luminosity. Star A is observed to be 4 times brighter than star B. How far away is Star A compared to Star B?
Two similar metal spheres, A and B, have charges of +2.0 x10 –6 coulomb and +1.0 x10 –6 coulomb, respectively, as shown in the diagram below. What is the charge on each sphere after the spheres make contact and are then separated?
Answer:
+1.5×10^-6C
................
It might be a good idea to talk to your parents about alcohol because:
might stumble upon this substance one day and be curious about what it does.
What is the electrical force of two punctiform electrical charges of 3ųC and 4ųC respectively at a distance of 10 cm in a vacuum
Answer:
Electrical force, F = 10.8 N
Explanation:
We have,
Charge 1, [tex]q_1=3\ \mu C=3\times 10^{-6}\ C[/tex]
Charge 2, [tex]q_2=4\ \mu C=4\times 10^{-6}\ C[/tex]
Distance between charges is 10 cm or 0.1 m
It is required find the electric force between two charges. The formula used to find the electrical force is given by :
[tex]F=\dfrac{kq_1q_2}{r^2}[/tex]
k is electrostatic constant
Plugging all the values we get :
[tex]F=\dfrac{9\times 10^{9}\times 3\times 10^{-6}\times 4\times 10^{-6}}{(0.1)^2}\\\\F=10.8\ N[/tex]
So, the electrical force between charges is 10.8 N.
You push a block to the top of an inclined plane. The mechanical advantage of the plane is 5. The inclined plane is 10 meters long. What is the height of the inclined plane?
0.5 m
2 m
50 m
10 m
Answer:
Height of the inclined plane = 2 m
Explanation:
Given:
Mechanical advantage of the plane = 5 m
Inclined plane = 10 meters
Find:
Height of the inclined plane = ?
Computation:
⇒ Height of the inclined plane = Inclined plane / Mechanical advantage of the plane
⇒ Height of the inclined plane = 10 m / 5 m
⇒ Height of the inclined plane = 2 m
The peak wavelength for the blackbody curve a star is in the UV range assuming the radiation from the star can reach earth would you be able to see it yes or no
Answer:
No
Explanation:
We would not be able to see the star because its radiation is in the UV range. For the star to be visible, it has to be in the visible spectrum of light for me to be able to see it with my eyes.
At what angle should two mirrors inclined to produced 10
images during reflection of a body?
Answer:
36°
Explanation:
let n=10 images
n=360/theta
10=360/theta
theta=360/10
theta=36°
hope you help this
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In 1825, French scientist François-Vincent Raspail became the first scientist to observe that every cell is produced through cell division. How is cell division different in single-celled organisms than in multi-celled organisms? A. Single-celled organisms duplicate their genetic material twice during cell division. B. Cytokinesis divides single-celled organisms into three daughter cells. C. There is no metaphase for single-celled organisms. D. Cell division results in reproduction in single-celled organisms.
Answer: A.
Single-celled organisms duplicate their genetic material twice during cell division
Explanation:
All multicellular organisms use cell division for growth and the maintenance and repair of cells and tissues. Single-celled organisms use cell division as their method of reproduction. Somatic cells contain two copies of each of their chromosomes (one copy from each parent).
Answer:
Cell division results in reproduction in single-celled organisms. The correct option is D.
Explanation:
Single celled organism which are equally known as unicellular organisms are organisms which are made up of one cell. Due to the simplicity of the structure of these organisms, reproduction can be achieved through cell division.
Multicellular organisms as the name implies is made up of multiple cells,unlike unicellular organisms, which are to varying degrees integrated and independent.
Every cell is produced through cell division.
Cell division results to reproduction in single-celled organisms while cell division aids in the formation of gametes, which are cells that combine with others to form sexually produced offspring. It is also responsible for the development of a multi-celled organism from a single fertilised egg cell.
How does increasing the prong angle affect the launch angle and initial speed of the projectile?
Answer:
48.41 m/s
Explanation: