Answer:5.45X10^3m
Explanation:So use the formula,v= fλ
3X10^8=5.5X10^4λ what Im saying is divide both and u should get 5454.54m but do sig figs to get answer
Answer:
5.45X10^3m
Explanation:
Se lanza desde el piso una piedra con velocidad vertical de +42 m/s. El punto de referencia se encuentra en el piso. Calcular: a). Escribir la ecuación de posición y la ecuación de la velocidad. b). Calcular en que instante su velocidad es nula. c). Calcular la máxima altura que llego. (Considerar la aceleración de la gravedad: a=9.81m/s2).
Answer:
a) y = 42 t - 4,905 t² , v = 42 - 9.81 t, b) t = 4.281 s , c) y = 89.9 m
Explanation:
This problem is an example of vertical launch
a) the expression for the position is
y = v₀ t - ½ g t²
we substitute
y = 42 t - 4,905 t²
the expression for speed is
v = v₀ - gt
v = 42 - 9.81 t
b) the speed is null when v = 0
v₀ = gt
t = v₀ / g
t = 42 / 9.81
t = 4.281 s
c) for the maximum height we can use the expression
v² = v₀² - 2gy
at maximum height v = 0
y = v₀² / 2g
let's calculate
y = 42 2/2 9.81
y = 89.9 m
Can someone help me out??? I need this done ASAP TYSM!!
Answer:
Answer is D
Explanation:
By changing the direction of the current moving through the wire will change polarity of the magnet but it will not affect the strength of the magnet.
What other forensic techniques have come under fire as not being as scientific as presumed?
Answer:
Explanation:
Forensic techniques such as bite mark analysis, blood spatter analysis, ballistic analysis, the matching of bullet casings to a gun, the matching of hair and fibers, and fingerprint analysis. All of these have come under fire which have not being as scientific as presumed.
The current in the wires of a circuit is 60.0 milliAmps. If the voltage impressed across the ends of the circuit were one-third of the original voltage (with no change in its resistance), then its new current would be _____ milliAmps. *
Answer: its mile 10 it has to be not this one
Explanation: to be load
HELP ASAP
What happens when the mantle melts?
It produces oceanic crust,
explain how you would measure the volume of irregular shaped object using the displacement method
Answer:
Place the object in the graduated cylinder, and record the resulting water volume as "b." Subtract the volume of the water alone from the volume of the water plus the object. For instance, if "b" was 50 milliliters and "a" was 25 milliliters, the volume of the irregularly shaped object would be 25 milliliters.
The volume of the irregular solid can be measured using a graduated cylinder having a known volume of water.
A solid is irregular if it does not fit into any of the known shapes. It is possible to determine the volume of these objects using the displacement method.
In this method, a graduated cylinder containing a known volume of water is used. The irregular solid is now introduced into the cylinder and the displacement of the water is noted.
The displacement of the water is obtained as;
Final volume of water - Initial volume of water. The amount of water displaced is equal to the volume of the irregular solid.
Learn more: https://brainly.com/question/16610815
Explain how energy is converted from potential to kinetic energy when a pendulum is swinging
Answer:
Once the weighted end of the pendulum is released, it will become active as gravity pulls it downward. Potential energy is converted to kinetic energy, which is the energy exerted by a moving object. An active pendulum has the most kinetic energy at the lowest point of its swing when the weight is moving fastest.
Explanation:
¿Alguien me puede ayudar? Problema: Un niño le pide gastada a su papá y éste le contesta que le dará los $120 que tiene en su bolsillo siempre y cuando conteste cuántas monedas de a $5 y de a $2 tiene en él si en total hay 33. ¿Qué debe contestar el niño si quiere los $120?
Answer: there are 15 coins of $2 and 18 coins of $5
Explanation:
I will answer in English.
X is the number of $5 coins.
Y is the number of $2 coins.
We have the system of equations:
Y + X = 33
Y*2 + X*5 = 120
first, we must isolate one of the variables in one of the equations and then replace it in the other equation, let's isolate Y in the first equation:
Y = 33 - X.
Then we can replace it in the other equation:
(33 - X)*2 + X*5 = 120
66 - X*2 + X*5 = 120
X*3 = 54
X = 54/3 = 18
and using the equation for Y.
Y = 33 - X = 33 - 18 = 15
So there are 15 coins of $2 and 18 coins of $5
Select the correct answer.
Which is a transverse wave that requires a medium to move?
A.
ocean wave
B.
sound wave
C.
light wave
D.
microwave
Answer:
a
Explanation:
Things that are _______________________ cannot be broken down by living organisms.
Answer:
I would say the answer is Non-Biodegradable......eg, plastics, rubber, metals,etc.
HOPE THIS HELPS.
A person of mass 55 kg swings on a rope length 4 m from rest (when the rope makes an angle of 30 degrees with the vertical) and collides perfectly inelastically with a 70 kg person on the ground when the rope is exactly vertical. Determine the maximum angle the rope makes with the vertical after the 55 kg person picks up the 70 kg person.
Answer:
θ = 19.66°
Explanation:
To determine the angle that the rope makes with the vertical for the two people, you first take into account the potential energy of the first person before he swings on the rope:
[tex]U=mgh[/tex]
h: distance to the ground
g: gravitational acceleration = 9.8m/s^2
m: mass of the first person = 55 kg
In the image attache below you can notice that the height h is:
[tex]h=4-4cos(30\°)=0.53m[/tex]
Then, the potential energy is:
[tex]U=(55kg)(9.8m/s^2)(0.53m)=285.67J[/tex]
When the first person picks up the second person (when the rope is exactly vertical), all the potential energy becomes kinetic energy. Next, when both people reaches the maximum height h' the energy must be equal to the initial potential energy of the first person:
[tex]U'=(m_1+m_2)gh'=285.67\ J[/tex]
From the previous equation you can get h':
[tex]h'=\frac{285.67J}{(55kg+70kg)(9.8m/s^2)}=0.2332m[/tex]
Finally, you obtain the angle between the rope at the height h,' and the vertical, by calculating the following:
[tex]h'=4-4cos(\theta)\\\\\theta=cos^{-1}(\frac{4-h'}{4})=cos^{-1}(\frac{4-0.2332}{4})=19.66\°[/tex]
hence, the angle between the rope and the vertical, when the two people are in the rope is 19.66°