Ball 1 with an initial speed of 14 m/s has a perfectly elastic collision with ball 2 that is initially at rest. After, the speed of ball 2 is 21 m/s. What will be the speed of ball 2 if the initial speed of ball 1 is doubled
Answer:
"42 m/s" is the appropriate answer.
Explanation:
Given:
Initial speed of Ball 1,
= 14 m/s
Now,
If the initial speed of ball 1 is doubled, then the speed of ball 2 will be:
⇒ [tex](V_{fx})_2=\frac{2m_1}{m_1+m_2}(v_1x_1)[/tex]
hence,
Doubling ([tex]v_1x_1[/tex]) will double [tex](V_{fx})_2[/tex],
⇒ [tex](V_{fx})_2=2\times 21[/tex]
[tex]=42 \ m/s[/tex]
A ball of 5.2 kg is swings around on a rope with radius 0.86
meters. If the ball is traveling at 1.8 m/s, what is its angular
momentum? (Round to the nearest hundredth).
Answer:
Explanation:
Angular momentum is L = mvr:
L = (5.2)(1.8)(.86) so
L = 8.05 kg*m/s
Which is the preserved evidence of the activity of an organism?
Answer:
Fossils are the remains of an ancient organism or the traces of activity of such an organism. There are two types of fossils: body fossils and trace fossils. Body fossils include preserved remains of an organism (i.e. freezing, drying, petrification, permineralization, bacteria and algea).
on what factors, current sensitivity voltage sensitivity of
a galvanometer depend?
That depends upon several factors
Number of turns of coilCurrent flowing through the galvanometerTorsion constant of suspension fibreStrength of magnetic fieldRestoring force.The length of a planet's day is determined by it's
Answer: "People will say the length of a day is determined by just the rotation rate of a planet, but that isn’t entirely true. The orbit around its sun also factors in. What we define as a day is the time between when the Sun is highest in the sky until the next time the Sun is at the highest point in the sky. This isn’t just the time it takes the Earth to rotate once on its axis, though. This is because, as the Earth is rotating, it’s also moving relative to the Sun"
A nucleus with mass number 229 emits a 3.443 MeV alpha particle. Calculate the disintegration energy Q for this process, taking the recoil energy of the residual nucleus into account.
Answer:
3.504 MeV
Explanation:
Given that;[tex]\frac{A}{Z} X ---->\frac{A-4}{Z-2} Y +\alpha + Q[/tex]
Also;
[tex]Q= KE_{\alpha } (M_{Y} + M_{\alpha } /M_{Y[/tex])
Mass number of X = 229
Mass number of Y = 225
Mass number of alpha particles = 4
Kinetic energy of alpha particles = 3.443 MeV
Q = 3.443 MeV (225 + 4/225)
Q= 3.504 MeV
why should we measure accurately
Answer:
To obtain fair results
Explanation:
if we don't measure the results might give unfair results
Answer:
Accurate measurement s r important bcz precise amounts r required for reaçtiøñ#s tø take place før a recipe tø turn out ãnd tø keep correct records of A measurement
uR ANSWER HOPE IT HELPS YOU...
A 330.-ohm resistor is connected to a 5.00-volt battery. What is the current through the resistor?
Answer:
From Ohms Law
V=IR
V=5volts
R=33.0hms
I=V/R
I= 5/330
=0.0152A
The current flowing through the cross-section of the resistor is 0.0152A.
Given the data in the question;
Resistance; [tex]R = 330ohm[/tex]Voltage; [tex]V = 5.00V[/tex]Current; [tex]I = \ ?[/tex]Ohm's lawOhm's law states that "the current flowing through the cross-section of a conductor is directly proportional to the voltage across it".
It is expressed as;
[tex]V = IR[/tex]
Where V is voltage, I is current and R is the Resistance.
To determine the current flowing through the resistor, we substitute our given values into the expression above.
[tex]V = IR\\\\I = \frac{V}{R}\\ \\I = \frac{5.00V}{330\ Ohm} \\\\I = 0.0152A[/tex]
Therefore, the current flowing through the cross-section of the resistor is 0.0152A.
Learn more about Electric current here: https://brainly.com/question/2264542
11. In a new science fiction movie an enemy spaceship explodes. Will an observer on a nearby
moon hear the explosion, see the explosion, or both? Explain
Answer:
Sound is transmitted by longitudinal waves thru air - the observer cannot hear the explosion because no air is present between the moon and the ship
Light is transmitted by electromagnetic waves so the light from the explosion can travel between the moon and the observer.
A parallel plate capacitor has a capacitance of 6.78 μF and it is connected to a 12V battery. What is the charge on the capacitor?
Answer:
8.136×10⁻⁵ J
Explanation:
Applying,
Q = Cv................ Equation 1
Where Q = Charge on the capacitor, v = voltage of the battery, C = capacitance of the capacitor.
From the question,
Given: C = 6.78μF = 6.78×10⁻⁶ F, v = 12 V
Substitute these values into equation 1
Q = (6.78×10⁻⁶ )(12)
Q = 8.136×10⁻⁵ J
Hence the charge on the capacitor is 8.136×10⁻⁵ J
60.0 kg downhill skier is moving with a speed of 10.0 m/s as she starts her descent from a level plateau at 150.0 meters of height above the base of the slope below. The length of the slope is 650 meters. There is a frictional force of 70 N affecting the skier's motion while she coasts the entire descent without using her poles. Upon reaching the bottom she continues to coast to a stop. How much kinetic energy will she have at the bottom of the hill?
Answer:
She will have kinetic energy at the bottom of the hill=45700 J
Explanation:
We are given that
Mass, m=60 kg
Speed, v=10 m/s
Height, h=150 m
Length of slope, d=650 m
Frictional force, f=70 N
We have to find the kinetic energy she will have at the bottom of the hill.
Kinetic energy at the bottom of the hill
=Initial kinetic energy+ mgh-fd
Substitute the values
Kinetic energy at the bottom of the hill
=[tex]\frac{1}{2}(60)(10)^2+60\times 9.8\times 150-70\times 650[/tex]
=[tex]45700J[/tex]
Hence, she will have kinetic energy at the bottom of the hill=45700 J
Please Help with thia question
Answer:
the types of force shown in the picture is
balanced force.
An object is to the left of a convex mirror. Describe the two rays needed to indicate the location and height of the image. Additionally, state what side of the mirror the image is on and whether it is real or virtual.
Answer:
1) a ray parallel to the optical axis that after passing through the lens passes through the focal length
2) a ray that passes through the center of curvature, this ray does not have any deviation
real image d_{objet} > f
Explanation:
In geometric optics, you can find the position of the image by geometric method, we draw two rays
1) a ray parallel to the optical axis that after passing through the lens passes through the focal length
2) a ray that passes through the center of curvature, this ray does not have any deviation
3) a ray that passes through the focal length and when passing the lens comes out horizontally
The interceptor point is where the image is
To determine if the image is real or virtual, when the object is at a greater distance than the focal length, the image is real and when it is at a shorter distance, the image is virtual.
The virtual image is formed on the same side as the object
real image d_{objet} > f
In a pinball machine, the launching spring with a spring constant of 30 N/m is compressed 0.15 m. How fast will it launch a 0.20 kg pinball?
Answer:
1.84 m/s
Explanation:
Applying,
The kinetic energy of the pinball = Elastic energy of the spring
mv²/2 = ke²/2
mv² = ke².................. Equation 1
Where m = mass of the pin ball, v = velocity of the pin ball, k = force constant of the spring, e = extension of the spring.
make v the subject of the equation
v = √(ke²/m)................ Equation 2
From the question,
Given: e = 0.15 m, k = 30 N/m, m = 0.20 kg
Substitute these values into equation 2
v = √[(30×0.15²)/0.2]
v = 1.84 m/s
Hey help me and thanks in advance if you do
P = W / t
2000 = 30000 / t
t = 30000/2000
t = 30/2
t = 15 seconds
Explanation:
work(w)=30000J
power(p)=2000W
time taken(t)=?
now,
p=w/tt=w/pt=30000/2000t=15 sechope it helps.
stay safe healthy and happy.In a physics lab, Ray Zuvlite arranges two mirrors with a right angle orientation as shown. Ray then directs a laser line at one of the mirrors. The light reflects off both mirrors as shown. If angle A is 25°, determine the what is the angle measure of angles B, C, and D?
Answer:
B = 25°
C = 65°
D = 25°
Explanation:
The given parameters are;
The orientation of the two mirrors = At right angle to each other
The laser light is directed at one of the mirror
The measure of angle, A = 25°
The measures of angle B, C, and D are found as follows;
We have;
∠A = ∠B = 25°, by angle of incidence equals angle of reflection
∠B = 25°
∠B + ∠C = 90° by sum of the acute angles of a right triangle
25° + ∠C = 90°
∴ ∠C = 90° - 25° = 65°
∠C = 65°
∠E = ∠C = 65° by angle of incidence equals angle of reflection
∴ ∠E = 65°
Line 'L' is perpendicular to the second mirror, therefore, the angle between line 'L' and the second mirror = 90° = ∠E + ∠D
∠E + ∠D = 90°, by angle sum property
Therefore;
65° + ∠D = 90°
∴ ∠D = 90° - 65° = 25°
∠D = 25°
How does a circuit breaker protect a refrigerator?
Answer:
When the circuit breaker trips and turns off, it can shut off power to the appliance. This not only protects your home from damage, but it also protects the appliance itself.
Explanation:
What is a circuit breaker. A circuit breaker is an electrical switch designed to protect an electrical circuit from damage caused by overcurrent/overload or short circuit. Its basic function is to interrupt current flow after protective relays detect a fault.
How many Americans get sick from consuming contaminated food/water each year
Answer:
48 million people get sick, 128,000 are hospitalized, and 3,000 die
Explanation:
Answer:
48 million is get sick from consuming contaminated food/water each 6ear
plsss helpp i really need this now thank u ❤️
Answer:
10.
parabolic
11.
Entirely horizontal
12.
45°
Una rueda gira con una frecuencia de 530 rpm. Determina la velocidad angular, el periodo y la frecuencia.
Answer:
donde esta la bibliotekaaa
Explanation:
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Por definición de velocidad angular, periodo y frecuencia del M.C.U., la frecuencia, la velocidad angular y el periodo de la rueda son 8.833 Hz, 55.50 rad/s y 0.113 segundos respectivamente.
Movimiento Circular UniformeEl movimiento circular uniforme (M.C.U.) es un movimiento de trayectoria circular en el que la velocidad angular es constante. Esto implica que describe ángulos iguales en tiempos iguales.
En otras palabras, el M.C.U. describe el movimiento de un cuerpo con una rapidez constante y una trayectoria circular, cambiando en cada instante de dirección.
FrecuenciaLa frecuencia mide el número de revoluciones o vueltas completadas por unidad de tiempo. La frecuencia se expresa en s⁻¹ o Hertz (Hz).
Se define como:
f= ω÷ (2π) siendo ω la velocidad angular.
PeriodoEl periodo (T) es el tiempo que el cuerpo emplea en dar una vuelta completa; es decir que las características del movimiento son las mismas cada T segundos.
Se define como:
T= (2π)÷ ω siendo ω la velocidad angular.T= 1÷ f siendo f la frecuencia.Velocidad angular, periodo y frecuencia de una ruedaUna rueda gira con una frecuencia de 530 rpm. Expresada en las unidades correspondientes, la frecuencia de la rueda es:
f = 530rpm×[tex]\frac{1 min}{60 segundos}[/tex]
f = 8.833 Hz
Siendo la frecuencia f= ω÷ (2π), entonces la velocidad angular es calculada como:
ω= f× (2π)
Entonces, la velocidad angular de la rueda es:
ω= 8.833 Hz× (2π)
ω= 55.50 rad/s
Finalmente, por definición de periodo, el periodo de la rueda es:
T= 1÷ 8.833 Hz
T=0.113 segundos
En resumen, la frecuencia, la velocidad angular y el periodo de la rueda son 8.833 Hz, 55.50 rad/s y 0.113 segundos respectivamente.
Aprende más sobre el movimiento circular uniforme:
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Problem 6. A negatively charged particle is placed in a uniform electric field directed
from South to North. In which direction will the particle move after it is released?
A) West
B) East
C) South
D) North
E) North-West
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UP
A
B
Meeting na
D
Activate!
Go to Setting
C) South
As we know that, north is considered as negative, and south as positive. Now, the charge on particle is negative; so, when we will release it, it will move towards the south.
In the scenario where the negatively charged particle is placed in a uniform electric field, the direction will be C. South.
What is an electric field?It should be noted that an electric field simply means the physical field which surrounds electrically charged particles.
Since the negatively charged particle is placed in a uniform electric field directed from South to North, the direction that the particle move after it is released is South.
Learn more about electric field on:
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please help!!
A 1.50 V battery has a 32.0 Ohm
resistor attached. How much
current flows through the circuit?
(Unit = A)
Answer:
0.0469
Explanation:
v=1.50
r=32.0
i=?
equation
i=v/r
i=1.50/32.0
i=0.046875
round to 3 sig figs
i=0.0469
Answer:
.0469
Explanation:
acellus
A star produces energy by:
A: creating helium from hydrogen in its core.
B: reflecting energy from nearby stars.
C: absorbing and releasing the matter of other stars.
D: rotating quickly on its axis.
Here, the hydrogen atoms are combined to form a helium atom, and during this process of fusion, a significantly large amount of energy is released. Thus, stars produce a large amount of energy by forming helium from the combination of hydrogen in its core. Hence, the correct answer is option (C).
Answer:
A. Creating helium from hydrogen in its core.
Explanation:
Sacrificed my grade for points I hope it helps
3) Which has more translational energy?
A)A person running at 8 mi/hr
B)A person walking at 4mi/hr
C)They both have the same amount of translational energy
D)Neither has any translational energy
In general, ionic bonds form between a metal and a nonmetal. Covalent bonds usually form between two nonmetals. Which of the following pairs of atoms is most likely to form a covalent bond?
A. magnesium and chlorine
B. copper and bromine
C. nitrogen and oxygen
D. potassium and phosphorus
Answer:
C
Explanation:
Nitrogen and Oxygen donates electron to each other
Nitrogen and oxygen has the greatest chance of forming a covalent bond. Option C is correct.
What is a covalent bond?Covalent bonds are chemical bonds that keep atoms of different elements together while sharing electrons.
Compounds can be polar covalent or nonpolar covalent, depending on the electronegativity variations between components.
The nitrogen family, Group 15, can react with oxygen in a variety of ways. Nonmetallic elements include nitrogen and phosphorus and oxygen.
Ionic bonds often occur between a metal and a nonmetal. Covalent bonds are most commonly formed between two nonmetals.
Nitrogen and oxygen has the greatest chance of forming a covalent bond from given a pair of atoms.
Hence,option C is correct.a given
To learn more about the covalent bond, refer to the link;
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#SPJ2
Two people are sitting on wheeled chairs 1 metre apart. Person A is holding a 2kg ball. Person A throws the ball to Person. What happens to person A? Explain.
a.) their chair stays still
b.) chair rolls backwards
c.) chair rolls forwards
Answer:
B - Person A's chair rolls backwards.
Explanation:
This can be seen simply through the Conservation of Momentum. When the ball is thrown to be, the ball's momentum(+m) is transfererd to B, so B's chair moves forward(think about it - it makes sense, doesn't it?), meaning A's chair moves backwards.
So, B.
EXTRA TIP: Try drawing a diagram to help you!
Usain bolt ran the 200m race within 19.19 seconds. Calculate the speed of Usain bolt during the race
Answer: [tex]10.42\ m/s[/tex]
Explanation:
Given
Usain Bolt ran the race with a length [tex]200\ m[/tex]
Time is taken to complete it [tex]t=19.19\ s[/tex]
We know, [tex]\text{Distance}=\text{speed}\times \text{time}[/tex]
Insert the values
[tex]\Rightarrow 200=v\times 19.19\\\\\Rightarrow v=\dfrac{200}{19.19}\\\\\Rightarrow v=10.42\ m/s[/tex]
So, the speed of Usain Bolt is [tex]10.42\ m/s[/tex]
The Doppler shift involves a shift in the ___________________. Check all that apply. Group of answer choices actual intensity produced by the source of sound actual frequency produced by the source of sound the perceived pitch of sound observed by a listener the loudness of sound observed by a listener none of these
Answer:
actual frequency produced by the source of sound
Explanation:
According to Oxford dictionary; Doppler effect is"an increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move towards (or away from) each other."
The actual change in frequency of a wave is called the Doppler shift. The Doppler shift is caused by a constant relative motion between the source of the wave and the observer. This leads to a change in the observed frequency of the wave.
The citizens of Paris were terrified during World War I when they were suddenly bombarded with shells fired from a long-range gun known as Big Bertha. The barrel of the gun was 36.6 m long, and it had a muzzle speed of 2.20 km/s. When the gun’s angle of elevation was set to 55.0°, what would be the range? For the purposes of solving this problem, ignore air resistance. (The actual range at this elevation was 121 km; air resistance cannot be ignored for the high muzzle speed of the shells.)
Answer:
464.1 km
Explanation:
Using R = u²sin2Ф/g where R = range of projectile, u = muzzle speed = 2.20 km/s = 2.20 × 10³ m/s, Ф = angle of elevation or projection angle = 55° and g = acceleration du° to gravity = 9.8 m/s²
Substituting the values of the variables into the equation, we have
R = u²sin2Ф/g
R = (2.20 × 10³ m/s)²sin2(55°)/9.8 m/s²
R = 4.84 × 10⁶ m²/s²sin110°/9.8 m/s²
R = 4.84 × 10⁶ m²/s² × 0.9397/9.8 m/s²
R = 4.548 × 10⁶ m²/s²/9.8 m/s²
R = 0.4641 × 10⁶ m
R = 464.1 × 10³ m
R = 464.1 km
A force of 20N displaces an object to 5m in 10s. Calculate the power.
Answer:
hope it helps you see the attachment for further information