Answer:
Explanation:
Givens
vi = 50 m/s
vf = 0
a = - 9.81
t = ?
Formula
t = (vf - vi)/a
Solution
t = (0 - 50)/-9.81
t = 5.097
Notice that a is made into a minus. It does not mean subtract. It means that the direction of the projectile and gravity must go in opposite directions. You will find that direction is a critically important consideration in physics.
Answer:
It'd take it 5.10 seconds
Explanation:
At the top of the launch, it is maximum height, h
formular derivation :
At maximum height, final velocity, v is zero
From first newtons equation:
[tex]{ \sf{v = u + gt}}[/tex]
v is the final velocity
u is the initial velocity
g is acceleration due to gravity
t is the time taken
but v is zero:
[tex]0 = u + gt \\ gt = u \\ t = \frac{u}{g} [/tex]
since it is vertical motion, u = usin(theta), where angle is 90°
[tex]{ \boxed{t = \frac{u \sin( \theta) }{g} }}[/tex]
t is the time taken to reach the top of the launch:
substitute, taking g to be 9.8 m/s²
[tex]t = \frac{50 \times \sin(90 \degree) }{9.8} = \frac{50}{9.8} \\ \\ { \boxed{ \boxed{time = 5.10 \: seconds}}}[/tex]
1.How many significant digits are in 101,407,063?
Answer:
= 9
Explanation:
just count the numbers :D
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'
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.
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
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^_^
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
4 facts about relative dating?
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
Hola cómo están todos
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:
Derive the following relation/equation.
i.S=ut+1/2at²
Answer:
I hope it was helpful.........
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.
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.
if you have 75 hectograms it is the same as how many centigrams?
Answer:
As we know 1 hc = 10000cg
now,
75hg=(75×10000)cg750000cghope it helps.stay safe healthy and happy.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
You ride your skateboard to school and tell all your friends your rode at speed of 25 miles per hour. They know this cannot be true because they know
when you left the house and when you arrived at school
how far school is from your house and what time school starts
the distance between your house and school and how long it took you to get there
the distance between school and your house and the direction you traveled
Answer:
The correct answer is "The distance between your house and your school, and how long it took you to get there." This is the proper answer choice because mph is miles per hour. Meaning you can travel 25 miles in just one hour. Speed in such form is used for measuring distance, or time. Hope it helped.
Explanation:
Grop 17 of the periodic table contains the ?
Group 17 is the second column from the right in the periodic table and contains six elements: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (As), and (Ts). Astatine and are radioactive elements with very short half-lives and thus do not occur naturally.
Which functional group is nonpolar?(1 point)
hydroxyl
methyl
sulfhydryl
carbonyl
Answer:
methyl
EXPLANATION
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]
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 skateboarder fell doing a jump. she got up and after 5 seconds, returned to a velocity of 5m/s. what is her acceleration
what is meant by rusting
Answer:
The formation of reddish brown ferric oxide on iron by low temperature oxidation in the presence of water .
make me as brilliant answer
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
Newton's Law of Inertia states that ________.
Answer: It states that an object in motion will stay in motion, and an object at rest will stay at rest unless acted upon by an unbalanced force.
Explanation:
hope i helped
Answer: A object that is currently in motion will stay at motion. The law of interia is also known as Newton's first law of motion.
Explanation:
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.
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.
please help me fast
Answer:
pressure is force per unit length
Answer:
SI unit of displacement is meter
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.
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
10. Scientists try to develop an explanation for what
they see happening in the natural world. What
must be true of any explanation they develop?
A. It must be supported by evidence.
B. It can never be changed.
C. It must be shown to have practical value for
humans.
D. It must be based on information that other
scientists have also gathered.
Answer:
it must be based on information that other scientists have also gathered
Answer:
hope its ok
Explanation:
Science is a way of learning about what is in the natural world, how the natural world works, and how the natural world got to be the way it is. It is not simply a collection of facts; rather it is a path to understanding.so it should contain a logical theory but it can also never be said as the final answer.
so A) OR D) both are correct
