Answer:
v = (10 i ^ + 0j ^) m / s, a = (0i ^ - 9.8 j ^) m / s²
Explanation:
This is a missile throwing exercise.
On the x axis there is no acceleration so the velocity on the x axis is constant
v₀ₓ = 10 m / s
On the y-axis velocity is affected by the acceleration of gravity, let's use the equation
v_y = [tex]v_{oy}[/tex] - g t
[tex]v_{y}^2 = v_{oy}^2 - 2 g (y - y_o)[/tex]
at the highest point of the trajectory the vertical speed must be zero
v_y = 0
therefore the velocity of the body is
v = (10 i ^ + 0j ^) m / s
the acceleration is
a = (0 i ^ - g j⁾
a = (0i ^ - 9.8 j ^) m / s²
Define one solar day
Answer:
the time between successive meridian transits of the sum at a particular place
Question 3 (1 point)
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3
A group of physics students has been given a small stereo speaker and told to use it
for investigating sound waves. After much experimentation, the students discover
that the speaker works by quickly moving in and out. This process pushes the air
around it in little bursts that travel in the same direction as the speaker's motion.
Based on these observations, how should sound waves be categorized?
6
An electromagnetic wave that has transverse vibrations
A mechanical wave that has longitudinal vibrations
An electromagnetic wave that has longitudinal vibrations
A mechanical wave that has transverse vibrations
Activat
Answer:
Soundwave should be categorized as follows;
A mechanical wave that has longitudinal vibrations
Explanation:
Sound wave should be categorized as longitudinal waves that vibrate the particles of the medium transmitting sound energy layer by layer along a path parallel to the direction of propagation of the wave
Therefore, soundwave should be categorized as a mechanical wave because it is generated and propagated by the vibration of a source and the interaction of the source with the particles of the medium in which the source is located
soundwave is also a longitudinal wave because the direction of vibration of th particles of the medium through which the sound wave is transported is in the same direction as the wave
Therefore, sound wave should be categorized as mechanical wave that has longitudinal vibrations.
The soundwave should be categorized where the mechanical wave that has longitudinal vibrations
What is a sound wave?
It should be categorized at the time when the longitudinal waves should be vibrated the particles with respect to the medium transmitting via layer along with it the path should be parallel to the propagation direction of the wave. Also, it should be categorized as the mechanical wave since there should be the vibration of the source.
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One mole of titanium contains how many atoms?
O A. 60.2 x 1024
O B. 6.02 x 10-23
O C. 1.0
O D. 6.02 x 1023
SUBMIT
Answer:
[tex]\boxed {\boxed {\sf D. \ 6.02*10^{23} \ atoms}}[/tex]
Explanation:
One mole of a substance contains the same amount of representative particles. These particles can be atoms, molecules, ions, or formula units. In this case, the particles are atoms of titanium.
Regardless of the particles, there will always be 6.02*10²³ (also known as Avogadro's Number) particles in one mole of a substance.
Therefore, the best answer for 1 mole of titanium is D. 6.02*10²³ atoms.
Answer:
D) 6.02 x 1023
Explanation:
A.P.E.X
What would be the mass of an object that has a force of 88N and an acceleration of 12 m/s2?
Answer:
7.33 kg
Explanation:
F = ma
88 N = m(12 m/s^2)
m = 7.33 kg
would this be Newtons 1st, 2nd, or 3rd law
Answer:
Newton's First Law of Motion.
Explanation:
Newton's First Law of Motion states that a body continues its state of motion untill and unless an external force acts on it. Here, the truck moves forward even after the breaks are applied in order to maintain its State of motion.
What is the resistance ratio of two bulbs of 100W and 50W at 250V?
Answer:
This is an interesting and useful question.
With just a bit of algebra and a couple of equations, you can calculate the answer.
The MOST important equation is for Power, P=IV, current times voltage.
You have provided us with a value for the Power of each bulb (100W and 50W) and the voltage of 250V. These are easy numbers. Let's figure out the current through each bulb that produces each power rating.
Current through the 100W bulb = _______
Current through the 50W bulb = _______
(Do these numbers make sense? It would seem as though if the voltages are equal then more current would be needed to generate more power. Right?)
Now we have BOTH the current for each bulb AND the voltage for each bulb.
Time for another equation - the definition of resistance, R= V/I, voltage divided by current.
That should wrap things up for you.
(But, WAIT! Let’s actually MEASURE the resistance of each bulb. We’ve gotta find a resistance meter, also called an ohm-meter, to do this. Do NOT be disappointed if your measurements do not agree with your calculations. Life is WAAAAY too interesting to get hung up on details like this!)
The resistance ratio of the two bulbs is 1/2.
What is meant by electrical power ?Electrical power of a circuit is defined as the time rate of change of work done in an electrical circuit.
Here,
Power in the first bulb, P₁ = 100 W
Power in the second bulb, P₂ = 50 W
Voltage applied to the bulbs, V = 250 V
The expression for electric power in a circuit is given as,
Power, P = V²/R
where R is the resistance of the circuit.
Since, the voltage is same for both the bulbs, we can say that,
P [tex]\alpha[/tex] 1/R or R [tex]\alpha[/tex] 1/P
Therefore, the ratio of resistances of the bulbs,
R₁/R₂ = P₂/P₁
R₁/R₂ = 50/100
R₁/R₂ = 1/2
Hence,
The resistance ratio of the two bulbs is 1/2.
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At which latitude would tropical rain forests be most likely?
(giving brainliest)
-10 degrees North
-30 degrees South
-60 degrees North
-90 degrees South
Make
a claim about what might happen to a
population of rabbits in a forest if a new
predator moved to the forest. Cite evidence
to support the claim and explain your
reasoning.
Answer: The rabbits will die off and the things that rabbits eat will overpopulate.
Explanation:
HELPPP 15 points
If you can hear your sibling playing music in their room when you are in your room with the door closed, this is due to sound wave ____
a. absorption
b. reflection
c. refraction
d. transmission
its not a or b I believe it's d but I'm not positive
What is the correct answer! Thank you for your help
Calculate the work done when lifting a sack of potatoes with a force of 100N vertically
6m.
Answer:
600J
Explanation:
W=Fd so, W=100*6=600J
what is the total energy a 60W incandescent light bulb in KWh will consume in 336 hours?
(60 W) x (336 hrs) = 20,160 W-hr
That's 20.16 KWh .
6. _______________ : when a certain number of waves pass a given point for a certain number of seconds? Group of answer choices A. wavelength C. amplitude D. height B. frequency
Ill give brainly-ist.
Answer:
b
kakanandnanjsnMajdnAnnznnzkkzid
Answer:
Frequency
Explanation:
I just took that test
A particle was moving in a straight line at 172.8 km/hr. If it decelerated over 120 meters to come to rest, find the time taken to cover this distance.
Answer:
v=s/t
s=vt
t=s/v
t=(120×10‐³)/172.8
(the distance meters has been changed to kilometres)
t=1/1440 hrs
Given ,
Brainliest for correct answers :)
Please look at both pictures and answer correctly for brainliest
Answer:
a. 1100 meters.
b. Between B and C
c.1. Between point D and E
c2. Between point D and E
d. 3.7 m/s.
Explanation:
The girl travels the distance of 1100 meters from starting to the end. There is no motion occurs between B and C due to no change of distance value from 200 meters. Between point D and E, the girls covers 500 meters long distance and also covers fastest distance between point D and E because between point D and E, the girl covers 500 meters distance in 30 seconds which is the highest of all. The average speed of the girls is 3.7 meter/seconds if we divide total distance i.e. 1100 meters by time which is 300 seconds.
1. What is the mass of an object moving at 13 m/s and having 3042 J of kinetic energy?
Answer: 36 Kg
Explanation:
Ke= 1/2MV^2
Plug in the kinectic energy (3042 J) and solve for M.
3042= 1/2 (M) (13^2)
M= 36 Kg
You have two rocks made of the same material that are at the same
temperature. The first rock has three times the mass of the second rock. How
does the thermal energy of the two rocks compare?
A. The second rock has three times the thermal energy of the first rock
B. The first rick has six times the thermal energy of the second rock
C. The second rock has one-third as much thermal energy as the first rock
D. The rocks have the same amount of thermal energy
Answer:
the rocks have the same amount of thermal energy
Compare the concepts of mass and weight. Name three differences.
Answer:
1a)Mass is the amount of matter in the body.
1b)Weight is the measure of the amount of force acting on a mass due to acceleration and gravity.
2a)Mass can never be zero
2b)Weight can be zero if no gravity acts upon an object. like in space
3a) Mass does not change according to location.
3b)Weight varies according to location.
A spinning wheel on a fireworks display is initially rotating in a counterclockwise direction. The wheel has an angular acceleration of -4.20 rad/s2. Because of this acceleration, the angular velocity of the wheel changes from its initial value to a final value of -26.0 rad/s. While this change occurs, the angular displacement of the wheel is zero. (Note the similarity to that of a ball being thrown vertically upward, coming to a momentary halt, and then falling downward to its initial position.) Find the time required for the change in the angular velocity to occur.
Answer:
The time it takes for the change in the angular velocity to occur is 6.5 seconds
Explanation:
From the question, we have;
The angular acceleration of the wheel, α = -4.20 rad/s²
The final angular velocity of the wheel, ω = -26.0 rad/s
From the information, we have the initial direction of rotation of the wheel = Counterclockwise
The angular displacement while the change occurs = 0 rad/s
Therefore, the initial angular velocity of the wheel, ω₀ = 0 rad/s
We have;
[tex]\alpha = \dfrac{\omega -\omega _0 }{t - t_0}[/tex]
Where;
t - t₀ = The time it takes for the change to occur
[tex]\alpha = \dfrac{\omega -0 }{t - 0}[/tex]
When t₀ = 0, we have;
t - t₀ = t
[tex]\alpha = \dfrac{\omega }{t}[/tex]
[tex]\therefore t = \dfrac{\omega}{\alpha }[/tex]
[tex]\therefore t = \dfrac{-26 \, rad/s}{-4 \, rad/s^2 } \approx 6.5 \, seconds[/tex]
The time it takes for the change in the angular velocity to occur is t - t₀ = 6.5 seconds
the movement of a body between any two points in any direction is called
Answer:
I think is called Motion
but am not sure
Answer:
Maybe its displacement, I'm not sure?
Explanation:
the energy produced by the internal motion of atoms? electrical , thermal, chemical, nuclear
Answer:
Thermal energy, or heat, is the energy that comes from the movement of atoms and molecules in a substance. Heat increases when these particles move faster. Geothermal energy is the thermal energy in the earth. Motion energy is energy stored in the movement of objects. so the answer is thermal energy
Mars is 1.52 times as far from the Sun as Earth is. Predict the time required for Mars to orbit the Sun in Earth days.
The time required for Mars to orbit the Sun in Earth days is 1.87y.
What is Kepler's law of periods?The square of the time period of orbiting is directly proportional to the cube of the mean distance.
The ratio of mean distance, (am /ae)³ = (Tm/Te)²
Substitute the ratio of semimajor axis and time period of earth orbit Te =1 yr, we get
(1.52)³ = (Tm / 1 yr)
Tm=1.87y.
Thus, the time required for Mars to orbit the Sun in Earth days is 1.87y.
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Homework B5
Grade 9
March 2021
Name: ......M
Saya....... Nambert......
1- The density of fresh water is 1000 kg/m². The pressure gauge on the submarine in
a river was reading 100 kPa when it was at the surface. A sailor notices that the
gauge is now reading 250 kPa. How deep is he? How would this answer change if
the sailor were diving in sea water is slightly denser than fresh water? [3]
Answer:
I hope this helps a little bit.
Which statement correctly describes the relationship between air temperature and air pressure?
-Warm air rises, creating an area of low pressure.
-Cool air sinks, creating an area of low pressure.
-Warm air sinks, creating an area of low pressure.
-Cool air rises, creating an area of low pressure.
Which of these is an example of acceleration?
A) a bicyclist turning around a corner
B) a car traveling south with its cruise control set
C) a bus traveling north at 25m/s
D) a helicopter waiting to take off
You can download answer here
tinyurl.com/wpazsebu
Brainliest for correct answer :)
Choose The 3rd Option.
.....
Brainliest for correct answer in newtons :)
Answer:
This is your answer
Answer:
120 N
Explanation:
1 N = 1kg
120 N = 120kg
Hope this helps!
if the temperature is constant and the pressure increases, then the volume will ____.
HELLPPPPpppppppp mMmmeeeeeee
Student B is correct.
(3Ω + 6Ω + 17Ω ) = 26Ω
12v / 26Ω = 0.46 Amperes
PLS HELP! QUESTION (2/2)
Two blocks, one of mass 1.00 kg and 4.00 kg are tied together with a massless rope as in the image. This rope is strung over a massless, resistance-free pulley. The blocks are released from rest. Find the tension in the rope and the acceleration of the blocks.