Answer:
Speed is 34.5 m/s
Explanation:
From the third equation of motion:
[tex]{ \boxed{ \sf{v {}^{2} = {u}^{2} + 2as}}}[/tex]
v is final velocity, u is initial velocity, a is acceleration, s is displacement.
substitute:
[tex] {v}^{2} = {30}^{2} + (2 \times 2.4 \times 60) \\ {v}^{2} = 900 + 288 \\ {v} {}^{2} = 1188 \\ {v} = \sqrt{1188} \\ v = 34.5 \: m {s}^{ - 1} [/tex]
Differentiate the following functions with respect to x
xsin x
Answer:
Here is your answer
Hope it helps
The answer is xcos x + sin x
Explanation:
d/dx (xsin x)
= x d/dx (sin x) + sin x d/dx (x)
= xcos x + sin x (1)
= xcos x + sin x
Thus, The answer is xcos x + sin x
-TheUnknownScientist
an electric bulb has power 500 watt. what does it means
Answer:
The bulb consumes electrical energy at the rate of 500 Watts
1 Watt = 1 Joule/sec where the joule is the unit of energy
Electric energy is often expressed in kw-hrs
This means that 1 kilowatt of power is used for 1 hour
1 kw-hr = 1000 joules/sec * 3600 sec = 3.6E6 joules of energy
A science student makes the following statement:
I think plants grow faster in acidic soil than they do in
normal soil.
Which part of the scientific process is this?
O A. Forming a hypothesis
B. Testing a hypothesis
C. Stating a theory
Q
D. Analyzing data
Answer:
A. Forming a Hypothesis
Answer: C I think
Explanation:
a skateboarder fell doing a jump. she got up and after 5 seconds, returned to a velocity of 5m/s. what is her acceleration
Explain the characteristics of the Gypsum Hills regionIf we have a sample of silicon (Si) atoms that has 14 protons, 14 electrons, and 18 neutrons
What is the name of this specific silicon isotope?
silicon-14
silicon-32
silicon-46
silicon-153
Answer:
second one
Explanation:
Is stress a individual matter
pls answer! 10 points bc i have a lil amount now!!
Answer: B probably because it is using UV rays which is a chemical energy to give you that sunburn.
Which of the following is an example of a chemical property? the flammability of hydrogen the boiling point of ethanol the melting point of gold the density of neon gas please help for 100 points
Answer:
flammability of hydrogen
Explanation:
Chemical properties are properties that can be measured or observed only when matter undergoes a change to become an entirely different kind of matter. They include reactivity, flammability, and the ability to rust.
AYUDAAA PORFAVOR
Desarrollar un diagrama de flujo para un programa que solicite la base y la altura y calcule el área de un triangulo
Queremos crear un diagrama general para calcular el área de un triangulo.
Este será algo como:
Definir variablesPedirle al usuario que introduzca los valores deseados (de las variables).Leer los valores deseados y asignarlo a la variable correspondiente.Realizar la operación para calcular el área.Mostrar en pantalla el resultado.Como naturalmente habra algunas variaciones segun el programa que utilicemos, lo voy a escribir de forma bastante general.
Primero definamos nuestras variables:
Por ejemple, en fortran usariamos algo como:
real:: B, H, A
Donde B será la variable que usaremos para la base, H para la altura, y A para el área.
Luego tenemos que escribir en pantalla algo que le diga al usario que debe introducir la base y el area.
Luego el programa debe ser capaz de leer ese input.
con algo de la forma:
B = read*input 1
H = read*input 2
Una vez tenemos definidas las variables, simplemente calculamos el área del triangulo:
A = H*B/2
Finalmente la podemos mostrar en pantalla con algo como:
print(A).
Lo que nos mostraría el valor del área.
Concluyendo, el diagrama en general sería:
Definir variablesPedirle al usuario que introduzca los valores deseados (de las variables).Leer los valores deseados y asignarlo a la variable correspondiente.Realizar la operación para calcular el área.Mostrar en pantalla el resultado.
Si quieres aprender más, puedes leer:
https://brainly.com/question/21949109
can anyone tell me the answer of these whole question? thank you so much!
Answer:
a) the most dangerous combination of tires and roads surfaces are old tires on wet concrete because it shows the longest distance moved by a car when the brake is pushed
b) Old tires on wet concrete
c) wet tires require longer braking distance than dry tires because the wet surface on the tires slide rather
than stopping gradually.
help me please i dont understand
The choose C. 1.33
Tanθ =opposite / adjacent
Tanθ =20/15
Tanθ =1.33
I hope I helped you^_^
when an Apple falls towards the earth moves to meet the apples.Is this true?If yes'why is the earth motion not noticeable?
Oh, yes. It's definitely true.
The answer to your question is:
Because the Earth has something like (6 x 10²⁴) times as much mass as the apple has.
So when equal, opposite gravitational forces act on both of them, the apple's downward acceleration toward the Earth is something like (6 x 10²⁴) times as much as the Earth's upward acceleration toward the apple.
The apple doesn't spend too much time falling, before it hits the ground and both bodies stop moving toward each other. In that time, the apple travels something like (6 x 10²⁴) times farther than the Earth does.
So if the apple falls a mile down from the branch of the tree, then the Earth moves something like 0.000 000 000 000 000 000 011 inch up toward it.
THAT's why Earth's motion is not noticeable to us.
Which three words do I think will be the most challenging? Why?
life
time
luck
because those are random and we cannot count on em'
Hola cómo están todos
What is F = m x a in Newton's laws of motion?
Answer:
This is Newton's second law.
Newton's second law text:
(If a resultant force acts on a body, then an acceleration will give it an acceleration, the magnitude of which is directly proportional to the amount of the net force, and a direction is in the direction of the net force itself)
F=ma
net force = mass x acceleration
I hope I helped you^_^
Derive the following relation/equation.
i.S=ut+1/2at²
Answer:
I hope it was helpful.........
Briefly discuss the construction requirements of nuclear reactors to ensure the dangerous levels of radiation is monitored,controlled and contained to prevent catastrophes.
Answer:
Components of a nuclear reactor
Fuel. ...
Moderator. ...
Control rods or blades. ...
Coolant. ...
Pressure vessel or pressure tubes. ...
Steam generator. ...
Containment.
Which expression correctly describes force using SI units
Answer:
Force is defined as the rate of change of momentum. For an unchanging mass, this is equivalent to mass x acceleration. So, 1 N = 1 kg m s-2, or 1 kg m/s2.
Kilogram-force: kgf
The fastest and longest skydive fell an amazing 19.5 miles. His average speed while falling was 254 mi/hr. How
much time did the dive last?
Need soon please!
Answer: 4.6 minutes
Explanation:
(254 mi/hr) x (1hr/60min)= 4.23 mi/min
(19.5mi) x (1min/4.23mi)= 4.6 minutes
When the fastest and longest skydive fell an amazing 19.5 miles. His average speed while falling was 254 mi/hr, then the dive lasted for 276.377 seconds
What is speed?The total distance covered by any object per unit of time is known as speed. It depends only on the magnitude of the moving object. The unit of speed is meter/second. The generally considered unit for speed is a meter per second.
The mathematical expression for speed is given by
speed = total distance /Total time
As given in the problem The fastest and longest skydive fell an amazing 19.5 miles. His average speed while falling was 254 mi/hr
Total distance = 19.5 miles
Total time =?
average speed
By substituting respective values in the formula of speed
254 mi/hr = 19.5 miles/time
time = 19.5/254 hr
time = 0.0767716 hr
As we know 1 hr = 3600 seconds
0.0767716 hr = 0.0767716 ×3600 seconds
=276.377 seconds
Thus, the dive lasted for 276.377 seconds
Learn more about speed from here
brainly.com/question/7359669
#SPJ5
The charge of most alkaline earth metals.
Answer:
2+ charge
Explanation: The alkaline earth metals have two valence electrons in their highest-energy orbitals (ns2). They are smaller than the alkali metals of the same period, and therefore have higher ionization energies. In most cases, the alkaline earth metals are ionized to form a 2+ charge
Hope this helps, have a great day :)
a person walks 20 steps forward and 20 backward and converse a distance of 40 steps while his displacement is zero .why?
Answer:
he walked 20 forward and back so he ended at the same spot but still walked 40 steps by going forward and back
please help me fast
Answer:
pressure is force per unit length
Answer:
SI unit of displacement is meter
what do you mean by Spin quantum number?
Answer:
In atomic physics, the spin quantum number is a quantum number (designated ms) which describes the intrinsic angular momentum (or spin angular momentum, or simply spin) of an electron or other particle.
a 16 Watt bulb is used for 5 hrs. what is the energy consumed by the bulb
Energy = (power) x (time)
Energy = (16 watt) x (5 hours)
Energy = 80 watt-hours
or
Energy = 0.08 Kilowatt-hours
or
1 watt = 1 joule/second
5 hours = 18,000 seconds
Energy = (16 joule/sec) x (18,000 sec)
Energy = 288,000 Joules
Explanation:
A unit of electricity is represented in kilowatt-hour (KWh). To calculate units, you need to find the energy consumption. It is easy, just multiply power with time.
(16×5 ) watt-hour=80Wh.
Convert it to kilowatt-hour i.e 0.08 KWh/day.
So 0.08 KWh is the energy consumption for one day.
what is gravitational constant?also write it's si unit
Answer:
its the constant in Newton's law of gravitation that yields the attractive force between two bodies when multiplied by the product of the masses of the two bodies and divided by the square of the distance between them
6.67408 × 10-11 m3 kg-1 s-2
hope this helps
1. The atomic number of an element is the same as the number of ______ that the element has.
Answer:
Explanation:
The total number of protons in the nucleus of an atom gives us the atomic number of that atom. It is represented with the letter ‘Z.’ All the atoms of a particular element have the same number of protons, and hence the same atomic number. Atoms of different elements have different atomic numbers.
Which functional group is nonpolar?(1 point)
hydroxyl
methyl
sulfhydryl
carbonyl
Answer:
methyl
EXPLANATION
How much work do you do when you push a couch 3 m across the floor using a force of 60 N?
A hydrogen atom has a diameter of about 12.7 nm, express this diameter in centimeters.
We have to convert 12.7nm to cm
[tex]\\ \sf\longmapsto 12.7nm[/tex]
[tex]\\ \sf\longmapsto 12.7\times 10^{-9}m[/tex]
[tex]\\ \sf\longmapsto 0.127\times 10^{-7}m[/tex]
[tex]\\ \sf\longmapsto 0.00000127\times 10^{-2}[/tex]
[tex]\\ \sf\longmapsto 0.0000013cm[/tex]
From 10 to 20 seconds, the object is traveling at a constant 5 meters per second. How far did it travel in that 10 second time frame?
Answer:50m
Explanation:
