Answer:
Height of cliff = S = 20 m (Approx)
Explanation:
Given:
Initial velocity = 8 m/s
Distance s = 16 m
Starting acceleration (a) = 0
Computation:
s = ut + 1/2a(t)²
16 = 8t
t = 2 sec
Height of cliff = S
Gravitational acceleration = 10 m/s
S = 1/2a(t)²
S = 1/2(10)(2)²
Height of cliff = S = 20 m (Approx)
A child is perched perilously above a 150m ravine. The child has a mass of 45kg. How much
gravitational potential energy does the child have?
Answer:
U = 66,150 J
Explanation:
Gravitational Potential Energy
Gravitational potential energy is the energy stored in an object because of its vertical position or height in a gravitational field.
It can be calculated with the equation:
U=m.g.h
Where m is the mass of the object, h is the height with respect to a fixed reference, and g is the acceleration of gravity or [tex]9.8\ m/s^2[/tex].
The child of mass m=45 Kg is perched above a h=150 m ravine. His gravitational potential energy is:
[tex]U=45~Kg\cdot 9.8\ m/s^2\cdot 150\ m[/tex]
U = 66,150 J
How much work do you do when you push a shopping cart with a force of 20 N for a distance of 5m?
A.100J
B.10J
C.1J
D.1000J
Answer:
A.100J
Explanation:
Given parameters:
Force on car = 20N
Distance = 5m
Unknown:
Work done = ?
Solution:
Work done is the product of force and distance;
Work done = force x distance;
Insert given parameters and solve;
Work done = 20 x 5 = 100J
Which structure is found in some but not all plant cells?
vacuole
ribosome
cell wall
lysosome
HELP PLEASE AND THERES ONLY ONE CORRECT ANSWER!!!!!!!
Answer:
Lysosme
Explanation:
All plant cells have cell walls due to their ability to not protect themseleves unlike us humans or aniamls. Ribosomes and vacuoles also are in all plant cells as provide it with nutrients. Lysosme are not always commonly found in all plant cells because they have cell walls to proctect them. Hope this helps :)
Explain why the roofs are blown off during high speed winds.
Answer:
Roofs are blown down due to the speed and pressure of the winds that will become strong and can destroy anything in its path.
Explanation:
A 0.5 Kg block of ice at -20 °C was given 10,000 J of heat. Would this block of ice melt?
Answer:
I say maybe bc it has to depend on the heat of the ice environment
Explanation:
What are the three types of mechanical waves?
A. Water
B. Circular
C.longitudinal
D. Surface
E. Transverse
F. Sound
Answer:
I'm sure its transverse, longitudinal and surface
Explanation:
sorry if I'm wrong
A standing wave has a frequency of 471 Hz and a wavelength of 1.9. What is the speed of the
wave? (Round to the 2nd number after the decimal)
1
I REALLY NEED HELP !
Answer:
c = 894.90 m/s
Explanation:
Given data:
Frequency of wave = 471 Hz
Wavelength of wave = 1.9 m
Speed of wave = ?
Solution:
Formula:
Speed of wave = frequency × wavelength
c = f×λ
c = 471 Hz × 1.9 m
Hz = s⁻¹
c = 471s⁻¹ × 1.9 m
c = 894.90 m/s
The speed of wave is 894.90 m/s.
1. A way of life that involves little or no physical activity is called a(n)_______
lifestyle. *
A. lazy
B. active
C. fit
D. sedentary
Answer:
its either A or D
Explanation:
lazy-.
1.Unwilling to do work or make an effort; disinclined to exertion.
2.Causing idleness; relaxed or leisurely.
3.Sluggish; slow-moving.
Sedentary
1.Not moving; relatively still; staying in the vicinity.
2.medicine, of a job, lifestyle, etc. Not moving much; sitting around.
3.obsolete inactive; motionless; sluggish; tranquil
i think it's sedentary
As the temperature decreases, the atoms lose energy. The atoms begin to move slower. They are held together by attractive forces, but are still able to slide past each other.
solid to liquid
liquid to solid
gas to liquid
gas to solid
gas to liquid is the answer
Answer:
C. gas to liquid
Explanation:
ed. 2021
Why is gravity so weird?
Answer:
why gravity is so weird?
this is my opinion
Explanation:
One possibility — speculative at this point — is that in addition to the three dimensions of space that we notice every day, there are hidden extra dimensions, perhaps “curled up” in a way that makes them impossible to detect. If these extra dimensions exist — and if gravity is able to “leak” into them — it could explain why gravity seems so weak to us.
Answer:
One possibility — speculative at this point — is that in addition to the three dimensions of space that we notice every day, there are hidden extra dimensions, perhaps “curled up” in a way that makes them impossible to detect. If these extra dimensions exist — and if gravity is able to “leak” into them — it could explain why gravity seems so weak to us.
Explanation:
Martina travels from her house to her moms office building, From there she walks to school. After school, she walks to the library and then to a friends house before finally ending back at home. Fine Martina's totoal distance traveld
Answer:
2.15miles
Explanation:
The total distance traveled by Martina is the sum of the length of path of her travel. Distance is a scalar which has only magnitude but no directional attribute.
Total distance = Office - school + school - library + library - friend's house + friend's house - house
Now insert the given parameters:
Total distance = 1mile + 0.5mile + 0.25mile + 0.4mile = 2.15miles
Total distance is 2.15miles
Laura drives for 3 hours at 44 mph.
Clare drives 144 miles in 4 hours.
(a)
(b)
Who travels the greater distance?
Whose speed is the slower?
How far would Laura travel if she drove for 3 hours at the same speed
as Clare?
Answer: A) Clare B) Clare c) 108 miles
Explanation:
Step 1
For Laura
Time taken by Laura = 3hours
Speed = 44mphn
Distance covered = speed x time
= 44 X 3= 132 miles
For Clare
Distance covered =144 miles
time = 4 Hours
Speed = Distance / Time
144/ 4 =36 mph
Step 2
a) Who travels the greater distance= Clare travels at a greater distance of 144 miles.
b)Whose speed is the slower= Clare speed is slower with 36mph
c)How far would Laura travel if she drove for 3 hours at the same speed
as Clare?
if Laura's speed = Clare speed = 36mph
time = 3hours
Distance= Speed x time
= 36 mph x 3 hours
108miles
How much air resistance acts on a 100-N bag of nails that falls at its terminal speed?
Data from a weather satellite was used to generate the image below. The colored regions represent warm portions of the atmosphere.
Which fact about electromagnetic radiation allows scientists to gather such information about the Earth's atmosphere?
A.
Some of the Sun's visible light is scattered as it passes through the Earth's atmosphere.
B.
The warmer a region of the atmosphere is, the more infrared radiation it emits.
C.
Radio waves can pass through buildings and other solid structures.
D.
Ozone in the Earth's upper atmosphere absorbs ultraviolet radiation.
Answer: the answer is b “The warmer a region of the atmosphere is, the more infared radiation it emits”
Explanation:
Answer:
a
Explanation:
i got it right
4. When energy is transformed from one form to another, what kind of energy is
always part of the transformation ? (and is usually not in a useful form)
Biomechanical Energy
O Heat Energy
Nuclear Energy
Answer:
Energy conversion also termed as the energy transformation, is the process of changing one form of energy into another.
The Law of Energy Conversion.
Scenario Energy conversions involved
In steam engine The heat energy to Mechanical Energy
In Electric heater Electric Energy to Heat
During the transformation of energy from one form to another, the kind of energy that is always part of the transformation is: C. Heat energy.
What is energy?
Energy can be defined as the ability (capacity) to do work. Thus, the standard unit of measurement of energy is Joules (J).
The various kind of energy:
Basically, there are different kind of energy and these include:
Biomechanical energyWave energySound energyNuclear energyHeat energyThe Law of Conservation of Energy:
According to the Law of Conservation of Energy, energy can neither be created nor destroyed but it can only be transformed (converted) from one form to another such as potential energy to kinetic energy.
As a general rule, heat energy is always associated with the transformation of energy from one form to another.
Read more on energy here: https://brainly.com/question/23153766
Type the correct answer in the box. Spell the word correctly.
Read the sentence and type the correct answer in the box.
The Lambda-CDM model contains a cosmological constant, denoted by a lambda (λ) which is associated with dark energy and ___________.
Answer:
The Lambda-CDM model contains a cosmological constant, denoted by a lambda (λ), which is associated with dark energy and cold dark matter.
^Also works for Plato users.
Answer:
"cold dark matter"
Explanation:
other person is correct!!!
* THE ANSWER IS D * Find the location of fluorine (F) on the periodic table. What type of ion will fluorine form?
A. An ion with a +7 charge
B. An ion with a +1 charge
C. An ion with a -7 charge
D. An ion with a -1 charge
Answer:
d
Explanation:
Fluorine will form an ion with a -1 charge.
What is fluorine?Fluorine is a chemical detail with the image F and atomic range 9. it is the lightest halogen and exists under fashionable conditions as an extraordinarily poisonous, pale yellow diatomic gasoline. as the maximum electronegative element, it is extremely reactive, because it reacts with all other factors besides argon, neon, and helium.
What's fluorine used for?Fluorine is essential for the manufacturing of nuclear fabric for nuclear energy plant life and for the insulation of electrical towers. Hydrogen fluoride, a compound of fluorine, is used to etch glass. Fluorine, like Teflon, is used to make plastics and is likewise vital in dental health.
Learn more about Fluorine here: https://brainly.com/question/19900962
#SPJ2
a circle has radius of 10cm what is the area in m square. with explantion
Answer:20
Explanation: its easy
A bat, flying toward the east at 2.0 m/s, emits a shriek that is reflected back to it from a wall that is 20.0 m in front of the bat at the instant the shriek is emitted. Sound travels at 340 m/s in the air. How many milliseconds after emitting the shriek does the bat hear the reflected echo from the wall? *
Answer:
t = S / V where S is distance sound travels and V the speed of sound
S = 20 + 20 - v t where v is speed of bat and t time to hear echo
S = 40 - v t
t = (40 - S) / v = (40 - V t) / v substituting S from 1st equation
v t + V t = 40
t = 40 / (v + V) = 40 / (340 + 2) = .117 sec = 117 ms
A car traveling at a speed of 50.0 m/s encounters an emergency and comes to a complete stop. How much time will it take for the car to stop if it decelerates at -4.0 m/s2?
Answer:
t=1.25s
Explanation:
The formula is
a= (V1-V0) /t
t = (V1-V0)/a
V1=50m/s
V0= 0 m/s
a= - 4m/s2
t= (0-50)/-4 = 1.25s
A wagon is pulled to the right using a force of 20 N and to the left using a force of
30 N. What is the net force on the wagon?
Answer:
Net force = 10N
Explanation:
Net force refers to the sum total of all the forces acting on an object. Net force is denoted by Fnet. According to Newton's third law of motion, for every action force, there is an equal and opposite reaction force. This means that an object with net force is an unbalanced force.
In this case, a wagon is pulled to the right using a force of 20 N and to the left (opposite direction) using a force of 30 N. This means that the net force will be the difference of the two forces acting on the object i.e
Fnet = Fa - Fb
Fnet = 30N - 20N
Fnet = 10N
HELP!! Why is motion not considered a force?
Answer:
There cannot be a force without motion and if there is no motion, then there is no force acting.
Explanation:
A force is a vector that causes an object with mass to accelerate.
Answer:
because force need motion
Explanation:
4. Una pila recargable de 1.2 V tiene una etiqueta que dice 1 800 mAh a) ¿Cuál es la máxima cantidad de carga que puede acumular? B) ¿Y la máxima cantidad de energía? C) ¿Serán exactas todas las cifras significativas que aparecen en el dato de la etiqueta? Respuesta: a) 6480c b)7.8 x 10^3 j o 7.8 kJ c)no NECESITO EL PROCEDIMIENTO
Answer:
a) La carga eléctrica máxima que puede acumular la pila recargable es 6480 coulombs.
b) La máxima cantidad de energía acumulada por la pila recargable es 7776 kilojoules.
c) No son exactas todas las cifras significativas que aparecen en el dato de la etiqueta.
Explanation:
a) La capacidad de la batería es la corriente constante suministrada por la batería durante su tiempo de servicio. En este caso, puesto que la batería tiene una capacidad de [tex]1800\,mAh[/tex], significa que la batería entrega una corriente de 1.8 amperios durante una hora. La máxima cantidad de carga es estimada por la siguiente expresión:
[tex]q = C\cdot \Delta t[/tex] (1)
Donde:
[tex]C[/tex] - Capacidad de la pila recargable, medida en amperios-hora.
[tex]\Delta t[/tex] - Tiempo de servicio, medido en horas.
[tex]q[/tex] - Carga eléctrica, medida en coulombs.
Si tenemos que [tex]C = 1.8\,A[/tex] y [tex]\Delta t = 3600\,s[/tex], entonces la máxima cantidad de energía que puede acumular es:
[tex]q = (1.8\,A)\cdot (3600\,s)[/tex]
[tex]q = 6480\,C[/tex]
La carga eléctrica máxima que puede acumular la pila recargable es 6480 coulombs.
b) La máxima cantidad de energía suministrada por la batería ([tex]E_{max}[/tex]), medida en joules, es definida por la siguiente expresión:
[tex]E_{max} = q\cdot V[/tex] (1)
[tex]E_{max} = (6480\,C)\cdot (1.2\,V)[/tex]
[tex]E_{max} = 7776\,J[/tex]
La máxima cantidad de energía acumulada por la pila recargable es 7776 kilojoules.
c) Sabemos que las unidades estándar del voltaje y la capacidad son el volt y el amperio-hora, respectivamente. Entonces, si asumimos que las cifras significativas quedan representadas por el número de decimales y que se considera razonable que haya una cifra significativa, entonces tenemos que cada variable es en formato de ingeniería:
[tex]C = 1.8 Ah[/tex] y [tex]V = 1.2\,V[/tex].
Al mutiplicarse cualquiera de estas cantidades por un número con una cifra significativa deja con un producto con dos cifras significativas. Por tanto, se pierde precisión al realizarse operaciones de multiplicación.
No son exactas todas las cifras significativas que aparecen en el dato de la etiqueta.
The amount of sun’s energy that hits an area helps determine the climate of that area. The Brazilian Rainforest has a tropical climate that averages of up to 300 mm of rain during some months. Which of the following best describes the role of the water cycle in determining the rainforest’s weather?
A. Cool temperatures of the moist ground cause evaporation, then increased temperatures of the atmosphere form rain.
B. Hot temperatures causes the condensation and precipitation of water in rivers and streams.
C. Hot temperatures cause water to evaporate from rivers, then cooler temperatures of the upper atmosphere cause water vapor to change to precipitation.
D. Cool air near the rainforest floor causes liquid water to change to water vapor, then condensate to form precipitation.
Answer:
Cool temperatures of the moist ground cause evaporation, then increased temperatures of the atmosphere form rain.
Explanation:
The amount of sun’s energy that hits an area helps determine the climate of that area. The Brazilian Rainforest has a tropical climate that averages of up to 300 mm of rain during some months. Which of the following best describes the role of the water cycle in determining the rainforest’s weather?
A plant was placed in the corner of a room away from a window. What might you observe about the plant after five days?
Select one:
1 The plant is not effected by the light in the window
2 The plant is standing straight up from the pot
3 The plant is leaning away from the window
4 The plant is leaning towards the window
Answer:
4 the plant is leaning towards the window
Explanation:
that is due to the plant inhabit to grow towards the sunlight so the plants tries its best to get the sunlight by doing so and growing
A cat rolls up a hill. It’s initial Velocity is 10 m/s.n It’s final velocity is 0 m/s. The time was five seconds. Calculate Acceleration
Answer:
[tex]\boxed {\boxed {\sf a= -2 \ m/s^2}}[/tex]
Explanation:
Acceleration can be found by dividing the change in velocity by the time.
[tex]a=\frac{v_f-v_i}{t}[/tex]
The final velocity of the cat was 0 meters per second and the initial velocity was 10 meters per second. The time was 5 seconds.
[tex]v_f=0 \ m/s\\v_i=10 \ m/s\\t= 5 \ s[/tex]
Substitute the values into the formula.
[tex]a=\frac{0 \ m/s-10 \ m/s}{5 \ s}[/tex]
Solve the numerator.
0 m/s-10 m/s= -10 m/s[tex]a=\frac{-10 \ m/s}{5 \ s}[/tex]
Divide.
[tex]a= -2 \ m/s^2[/tex]
The acceleration of the cat was -2 m/s². The negative acceleration indicates slowing down or stopping.
what is convection?
what is radiation ?
what conduction?
--ⓒᴄᴏɴᴠᴇᴄᴛɪᴏɴ ᴏᴄᴄᴜʀꜱ ᴡʜᴇɴ ᴘᴀʀᴛɪᴄʟᴇꜱ ᴡɪᴛʜ ᴀ ʟᴏᴛ ᴏꜰ ʜᴇᴀᴛ ᴇɴᴇʀɢʏ ɪɴ ᴀ ʟɪQᴜɪᴅ ᴏʀ ɢᴀꜱ ᴍᴏᴠᴇ ᴀɴᴅ ᴛᴀᴋᴇ ᴛʜᴇ ᴘʟᴀᴄᴇ ᴏꜰ ᴘᴀʀᴛɪᴄʟᴇꜱ ᴡɪᴛʜ ʟᴇꜱꜱ ʜᴇᴀᴛ ᴇɴᴇʀɢʏ. ... ʟɪQᴜɪᴅꜱ ᴀɴᴅ ɢᴀꜱᴇꜱ ᴇxᴘᴀɴᴅ ᴡʜᴇɴ ᴛʜᴇʏ ᴀʀᴇ ʜᴇᴀᴛᴇᴅ. ᴛʜɪꜱ ɪꜱ ʙᴇᴄᴀᴜꜱᴇ ᴛʜᴇ ᴘᴀʀᴛɪᴄʟᴇꜱ ɪɴ ʟɪQᴜɪᴅꜱ ᴀɴᴅ ɢᴀꜱᴇꜱ ᴍᴏᴠᴇ ꜰᴀꜱᴛᴇʀ ᴡʜᴇɴ ᴛʜᴇʏ ᴀʀᴇ ʜᴇᴀᴛᴇᴅ ᴛʜᴀɴ ᴛʜᴇʏ ᴅᴏ ᴡʜᴇɴ ᴛʜᴇʏ ᴀʀᴇ ᴄᴏʟᴅ.
--Ⓡʀᴀᴅɪᴀᴛɪᴏɴ ɪꜱ ᴇɴᴇʀɢʏ ᴛʜᴀᴛ ᴄᴏᴍᴇꜱ ꜰʀᴏᴍ ᴀ ꜱᴏᴜʀᴄᴇ ᴀɴᴅ ᴛʀᴀᴠᴇʟꜱ ᴛʜʀᴏᴜɢʜ ꜱᴘᴀᴄᴇ ᴀɴᴅ ᴍᴀʏ ʙᴇ ᴀʙʟᴇ ᴛᴏ ᴘᴇɴᴇᴛʀᴀᴛᴇ ᴠᴀʀɪᴏᴜꜱ ᴍᴀᴛᴇʀɪᴀʟꜱ. ... ᴛʜᴇ ᴋɪɴᴅꜱ ᴏꜰ ʀᴀᴅɪᴀᴛɪᴏɴ ᴀʀᴇ ᴇʟᴇᴄᴛʀᴏᴍᴀɢɴᴇᴛɪᴄ (ʟɪᴋᴇ ʟɪɢʜᴛ) ᴀɴᴅ ᴘᴀʀᴛɪᴄᴜʟᴀᴛᴇ (ɪ.ᴇ., ᴍᴀꜱꜱ ɢɪᴠᴇɴ ᴏꜰꜰ ᴡɪᴛʜ ᴛʜᴇ ᴇɴᴇʀɢʏ ᴏꜰ ᴍᴏᴛɪᴏɴ). ɢᴀᴍᴍᴀ ʀᴀᴅɪᴀᴛɪᴏɴ ᴀɴᴅ x ʀᴀʏꜱ ᴀʀᴇ ᴇxᴀᴍᴘʟᴇꜱ ᴏꜰ ᴇʟᴇᴄᴛʀᴏᴍᴀɢɴᴇᴛɪᴄ ʀᴀᴅɪᴀᴛɪᴏɴ
--Ⓒᴄᴏɴᴅᴜᴄᴛɪᴏɴ ɪꜱ ᴛʜᴇ ᴡᴀʏ ɪɴ ᴡʜɪᴄʜ ᴇɴᴇʀɢʏ ɪꜱ ᴛʀᴀɴꜱꜰᴇʀʀᴇᴅ (ᴛʜʀᴏᴜɢʜ ʜᴇᴀᴛɪɴɢ ʙʏ ᴄᴏɴᴛᴀᴄᴛ) ꜰʀᴏᴍ ᴀ ʜᴏᴛ ʙᴏᴅʏ ᴛᴏ ᴀ ᴄᴏᴏʟᴇʀ ᴏɴᴇ (ᴏʀ ꜰʀᴏᴍ ᴛʜᴇ ʜᴏᴛ ᴘᴀʀᴛ ᴏꜰ ᴀɴ ᴏʙᴊᴇᴄᴛ ᴛᴏ ᴀ ᴄᴏᴏʟᴇʀ ᴘᴀʀᴛ).
By measuring the potential energy of an object relative to the ground, and the object's mass, you can calculate its speed when it hits the ground. Explain why you can do this.
A.because gravitational potential energy can convert to elastic potential energy
B.because gravitational potential energy can convert to kinetic energy
C.because the gravitational potential energy can convert to sound energy
D.because gravitational potential energy can convert to electric potential energy
Answer:
B.because gravitational potential energy can convert to kinetic energy
Explanation:
You can calculate the speed as it hits the ground because gravitational potential energy can convert to kinetic energy.
In this way, total energy can be conserved.
We can equate the kinetic energy and potential energy. From this we can solve for the velocity. This way, we know that the potential energy is changing to kinetic energy.Answer: B
Explanation:
A ships initial position is 25 km east of the origin. What is the ship’s final position if it sails at a constant velocity of 42 km/h east in exactly 1.5 h? (Note: answer in km)
Answer:
88km E
Explanation:
25 km is added already
then if we take the formula of speed(V)
V=d/t
and rearrange it to subject d (distance)
d= V x t
we get
d= 42km/h x 1.5hrs
we get
63 km
now if we add the already travelled 25 km to this additional distance
63km + 25km = 88km
Thus the final distance traversed by the ship from its origin is
88km E
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