Answer:
The initial velocity of the second stone is 34.3 m/s
Explanation:
The distance height covered by the second stone will be
75m - 15m = 60 m
Since the two stones hit the ground at the same time.
Using third equation of motion, which state that;
V^2 = U^2 - 2gH
Where
U = Initial velocity
V = final velocity
H = 60 m
g = 9.81 m/s^2
As the stone reaching the ground, that is, coming to rest, V = 0. Therefore,
Substitute all the parameters into the equation
0 = U^2 - 2 × 9.81 × 60
U^2 = 1177.2
U = 34.3 m/s
The initial velocity of the second stone is 34.3 m/s
The Bohr model of the atom suggest that the protons and neutrons are found in the nucleus and the electrons orbit the nucleus much like planets around the sun. How is our modern model of the atom different from this model? A) Neutrons are not found in the nucleus. B) The nucleus is much larger than first thought. C) The electrons contain smaller parts called quarks. D) The electrons move around the nucleus in an electron cloud
Answer:
I think it is D
Explanation:
the Bohr model says that electrons whizz around the atomic nucleus in the same way that the earth goes around the sun - but rather than being bound by gravity, it is bound by electromagnetic forces.
Light of wavelength 633nm passes through a single slit of width 1.50*10^-5 m. At what angle does the second interference minimum (m=2) occur? °
Answer: The second interference is minimum at angle 5 degree approximately
Explanation:
Given that the
Wavelength (λ) = 633nm
Width d = 1.5 × 10^-5m
n = 2
The wavelength (λ) of the light passing through a single slit is related to the angle Ø by
dsinØ = n(λ)
Substitutes all the parameters into the above formula
1.5×10^-5 × SinØ = 2 × 633 × 10^-9
Make SinØ the subject of formula
SinØ = 1.266×10^-6/1.5×10^-5
SinØ = 0.0844
Ø = Sin^-1( 0.0844 )
Ø = 4.84 degree.
The second interference is minimum at angle 5 degree approximately
Answer:
4.84
Explanation: (source) Trust Me Bro
equation for pressure at a depth H inside a fluid PLSS URGENTT
Answer:
We begin by solving the equation P = hρg for depth h: h=Pρg h = P ρ g . Then we take P to be 1.00 atm and ρ to be the density of the water that creates the pressure.
You are walking down the hallway and your mean little brother sticks his foot out to trip you. You don't notice and land- SPLAT! - sprawled out on the floor.
Based on the laws of motion, why did you fall?
3rd Law: Action- brother sticks out his foot. Reaction- you fall.
2nd Law: You weigh more than your little brother, so you had more acceleration.
4th Law: Little brothers are always mean.
1st Law: Your body was an object in motion and stayed in motion. Since the force stopped only your feet, the rest of your body kept going and fell.
Answer:
Answer is D. 1st law
Explanation:
because once an object is in motion it stays in motion until stoped by another force, in this case it would be your body hitting the floor
Help pls will mark right answer
Answer:
Less
Explanation:
Since acceleration is inversely propotional to mass keeping the force constant, hence more mass will accelerate less and vice versa.
50pts What is the medium of sound? Question 2 options: water solids gases air, liquids, or solids
Answer:
A medium is just a material through which an energy wave can propagate. This can include air, steel, glass, etc.
Its water solids gases air
Answer:
hey!
your answer is
Sound medium is a substance in which sound waves travel. Air, for example, is a sound medium.
Explanation:
solids and water are also mediums
hope this helps
If this sound wave hits this surface at the angle shown, choose the picture that shows how
it will reflect.
A. sound
wave
sound
wave
C.
sound
wave
sound
wave
surface
surface
surface
surface
sound
wave
sound
wave
D
sound
wave
sound
wave
surface
surface
surface
surface
HELP ME I'M DESPERATE PHYSICS EASY 40 POINTSS
1.A car moving with a speed of 108 km/h is brought to rest in a distance of 60 m. How much time did the car take to stop?
2 seconds
4 seconds
6 seconds
8 seconds
2.A student standing on the ground next to a tall building throws a ball straight up with a speed of 39.2 m/s. If it takes the ball 4 seconds to reach the same height as the top of the building, how tall is the building?
a.44.1 m
b.78.4 m
c.161.7 m
d.235.2 m
3.A boy throws a ball with an initial velocity of 19.6 m/s and it returns to his hands in 4 seconds. What maximum height does the ball reach?
4.9 m
9.8 m
19.6 m
39.4 m
Answer:
1.ans. The car take 2 seconds to stop.
the relationship between frequency and wavelength is:
a. direct
b. inverse
c. not related
Answer: A
Wavelength and frequency of light are closely related. The higher the frequency, the shorter the wavelength. Because all light waves move through a vacuum at the same speed, the number of wave crests passing by a given point in one second depends on the wavelength.
if it takes 150N of force to move a box 10 meters. what is the work done on the box?
Answer:
1500 Joules
Explanation:
Work = Force x Distance
When multiplying by 10 you simply shift all the digits to the
left and append a 0 to the end.
so 150 x 10 = 1500 Joules
Answer:
1500J
Explanation:
w = fd
f=150N. d=10meters
f= (150)(10)
f= 1500 J
The slope of this graph indicates _____.
acceleration
speed
velocity
displacement
Answer:
velocitt
Explanation:
if you look at the graph it is a displacement vs time graph so it either has to be a speed or a velocity. But the graph has a direction and it is displacement not distance so it is velocity.
Answer:
the person above is right but it's misspelled a little it's actually spelled as velocity
I hope this helped
-Shy_Lilliac
The main cause of weather is?
Answer: Weather on Earth is caused by heat from the sun and movement of the air. All weather happens in the lower layer of Earth's atmosphere, which is a layer of gases surrounding Earth. The sun's heat warms the air in this layer to different temperature levels in different places. ... This movement of air is what we call wind.
Please mark me as Brainliest
Explanation:
Answer:weather is caused by the heat and the movement of air.
Explanation:
I googled it
Which object experiences the greatest gravitational force? A)car B)fire truck C)plane D)human
Answer: C Plane
Explanation: According to Newton's law, gravitational force is proportional to the product of masses and inversely proportional to the square of distance between them.
Gravitational force depends on mass. The bigger the mass, the more the magnitude of the gravitational force. Since plane is assume to have the highest mass in the options, we can therefore conclude that plane will experience the highest gravitational force.
The unit of charge is.....
Teslas
O volts
joules
coulombs
Answer:
Coulomb
Explanation:
The unit of charge is coulomb. Electric current is defined as the electric charge per unit time. It can be written as :
[tex]I=\dfrac{q}{t}\\\\q=I\times t[/tex]
So, the correct option is (D) "coulomb".
A high-speed truck and a BUG have a head-on collision. The bug is crushed, while nothing happens to the truck. Do they hit each other with equal force?
Answer:
No
Explanation:
If they hit each other will equal force, the truck would have stopped too.
Answer:
They do not hit each other with equal force.
Explanation:
A bug does not weight as much as a truck.
What is the function of the cornea?
Its opening allows light rays to enter the eye.
Its muscles control its shape to help focus light.
Its inner surface sends nerve impulses to the brain.
Its curved surface focuses light.
Answer: B
Its muscles control its shape to help focus light.
Explanation:
The main function of a cornea is to help focusing the light ray into the eye lens.
Eyelids opening allows light rays to enter the eye.
While optic nerve inner surface sends nerve impulses to the brain.
Cornea can also function as a window lens that focuses light into the eye lens with its ability to refract and bend light into the eye lens.
Answer:
Its curved surface focuses light
Explanation: (Gradpoint)
During a workout, a football player pushes a blocking dummy a distance of 30 m. While pushing the dummy the same distance
a second time, what would the player need to change to be certain that power output increases?
The player would need to use a greater force and take more time.
The player would need to use a greater force and take less time.
The player would need to use a smaller force and take more time.
The player would need to use a smaller force and take less time.
Answer:
The correct option is (b).
Explanation:
The output power of any object is given by the work done divided by time taken i.e.
[tex]P=\dfrac{W}{t}\\\\P=\dfrac{Fd}{t}[/tex]
F is applied force
t is time taken
To increase the power output, the player would need to use a greater force and take less time. Hence, the correct option is (b).
60m27Co → 6027Co Predict the type of radioactive emission produced from the decay of metastable cobalt-60 to cobalt-60. Describe this type of emission and its reaction to an electric field. A) During the radioactive decay, alpha particles are released. These positive particles are attracted to the negative plate in the electric field and represent a ground energy level. B) Beta particles are released during the radioactive decay. These negative particles are attracted to the positive plate in the electric field and represent an excited energy state. C) Radioactive gamma decay is produced by the reaction. This neutral electromagnetic radiation allows the isotope to return to its ground state and is not attracted to the electric field. D) Both types of radioactive emissions, particles and electromagnetic radiation, are produced during this decay. None of these are attracted to the electric field and both present an intermediate level. Eliminate
How do you describe the frequency of waves perceived by the observer from the moment the source appears to the moment it disappears ?
Answer: the frequency increases and decreases.
Explanation: According to doppler effect, the frequency of waves tends to increase as the source approaches and decrease as the source disappears.
The Doppler effect occurs when a source of waves and/or observer move relative to each other, resulting in the observer measuring a different frequency of the waves than the frequency that the source is emitting.
which organism is a producer
1-oak tree
2-mushroom
3-mountain lion
4-butterfly
Answer:
Answer 1, oak tree
Explanation:
producer organisms are organisms that are mostly photosynthetic organisms like plants, some bacterias and unicellular organisms like euglena.
So the answer is 1 an oak tree because it is photosynthetic.
To see the others mushroom may be a plant like organism but it is not photosynthetic because it doesn't contain chlorophyll.
Mountain lions are not photosynthetic that means they are heterotrophs( organisms that cann't make their own food).
And butterflies are also heterotrophs
a.
Which of the following statements best describes the relationship between the environment and human health?
The environment is the only factor that affects human health.
b. Many aspects of the environment can have an impact on human health.
Human health is impacted by changes in climate.
d. The environment has no impact on human health.
C.
Please select the best answer from the choices provided
O A
OB
С
OD
Statements A best describes the relationship between the environment and human health.
What is the environment?A set of physical, chemical, and biotic elements and living creatures that interact with an organism or ecological community to determine its shape and survival.
The environment is the only factor that affects human health.
Human health and well-being require a clean environment. At the same time, the surrounding environment can be a source of stressors that harm health, such as air pollution, noise, and dangerous substances.
Hence, statements A best describes the relationship between the environment and human health
To learn more about the environment, refer to the link;
https://brainly.com/question/13107711
#SPJ2
There is force of 10 Newtons between two charged particles. If one charge is
doubled, what is the force now?
5 N
10 N
OZN
20 N
When a spring is compressed, the energy changes from kinetic to potential. Which best describes what is causing this
change?
work
power
gravitational energy
chemical energy
Answer:
Work
Explanation:
The definition of work in physics is, the measure of energy transfer that occurs when an object is moved over a distance by an external force at least part of which is applied in the direction of the displacement.
Therefore, the work that's been done causes a change in the overall energy of the system. It's what causes the change from potential to kinetic.
Work caused the energy change from kinetic to potential when the spring was compressed.
What is Work?
This is defined as measure of energy transfer which occurs when an object is moved as a result of an external force.
The spring was compressed which caused the movement and energy transfer thereby depicting work done and makes option A the correct choice.
Read more about Work here https://brainly.com/question/25573309
a. Fill in the blanks in the following paragraph to correctly identify some
unique properties of water. (1 point)
Water is important to living things because it remains in the___state over a wide range of temperatures. Water in lakes and oceans does
not experience large temperature changes because liquid water has a
___specific heat, so it must absorb or release a lot of energy as its temperature changes. The
___forces between water
molecules cause water to form round droplets and cause water's high___.Water is also an important_____because it can
dissolve many different substances.
Answer:
1.) Liquid
2.) Low
3.) Molecular
4.) Surface tension
5.) Solvent
Explanation:
Water is important to living things because it remains in the LIQUID state over a wide range of temperatures. Water in lakes and oceans does
not experience large temperature changes because liquid water has a
LOW specific heat, so it must absorb or release a lot of energy as its temperature changes. The MOLECULAR forces between water
molecules cause water to form round droplets and cause water's high SURFACE TENSION. Water is also an important SOLVENT because it can
dissolve many different substances.
1.) Liquid
2.) Low
3.) Molecular
4.) Surace tension
5.) Solvent
The following information should be considered:
Water is important to living things because it remains in the LIQUID state over a wide range of temperatures. Water in lakes and oceans does not experience large temperature changes because liquid water has a LOW specific heat, so it must absorb or release a lot of energy as its temperature changes. The MOLECULAR forces between water molecules cause water to form round droplets and cause water's high SURFACE TENSION.Water is also an important SOLVENT because it can dissolve many different substances.Learn more: https://brainly.com/question/4804019?referrer=searchResults
Which is an example of a compound machine?
ramp
bicycle
crowbar
seesaw
Answer:
A bicycle.
Explanation:
A compound machine is a machine consisting of multiple simple machines.
A bicycle contains 3 simple machines. A lever, pulley, and wheel-and-axle.
all other choices are simple machines.
Hope this helps!
-MoCKEry
Answer:
I think its bicycle
Explanation:
The load across a 120-V power supply consists of three resistances are R1 = 10 Ω, R2 = 30 Ω, and R3 is unknown. If R2 has a difference of potential of 45 V across it, find the other voltage drops across the other resistors, the current through each resistor, and R3.
In acceleration, if you were taking distance measurements of a free falling
object at one-second intervals, you would see the object moving ______ at each measurement interval.
A. the same amount
B. less and less
C. farther
D. a small amount
Answer:
C --> Farther
Note: I would appreciate if you give 5 stars, Thank you, and Brainliest
A girl standing on top of a roof throws a stone into the air with velocity +v. She then throws a similar stone directly downwards with a velocity -v. Compare the velocities of both stones when they reach the ground.
Answer: The two stones will have different final velocity due to different distance covered ( height ) reaching the ground at different time.
Explanation:
Throwing a stone into the air with velocity +v means she throws the stone with an upward velocity. She then throws a similar stone directly downwards with a velocity -v.
The two stones will have different final velocity due to different distance covered ( height ) reaching the ground at different time.
please help!!!!
An increase in oil exploration has lead to an increased demand for this mineral produced in Nevada.
A) barite
B) fluorite
C) pyrite
D) sphalerite
Answer:barite
Explanation:barite is in fuel
What is the kinetic energy of a 24-kg mass that is moving with a velocity of 2 m/s?
Answer:
1/2mv^2
1/2*24*2^2
answer=48
Answer:
48 J
Explanation:
Kinetic energy can be found using the following formula:
[tex]KE=\frac{1}{2}mv^2[/tex]
where m is the mass in kilograms and v is the velocity in m/s.
We know the mass is 24 kilograms and the velocity is 2 m/s Therefore, substitute 24 in for m and 2 in for v.
[tex]KE=\frac{1}{2}*24*2^2[/tex]
Evaluate the exponent first. 2^2 is the same as multiply 2, 2 times.
2^2=2*2=4
[tex]KE=\frac{1}{2}*24*4[/tex]
Multiply 24 and 4
[tex]KE=\frac{1}{2} *96[/tex]
Multiply 96 and 1/2, or divide 96 by 2.
[tex]KE=48[/tex]
Add appropriate units. Kinetic energy uses Joules, or J
[tex]KE=48 Joules[/tex]
The kinetic energy is 48 Joules