Answer:
v = 51.4 m/s
Explanation:
Given that,
Initial velocity of a penny, u = 2.4 m/s
It fall under the influence of gravity for 5 s.
We need to find the final velocity of the penny. Let v is its final velocity. It can be calculated using first equation of motion as follows :
[tex]v=u+at[/tex]
a = g
[tex]v=2.4+9.8(5)\\\\=51.4\ m/s[/tex]
So, the final velocity of the penny is 51.4 m/s.
What season is it in your town when it is fall in the Southern Hemisphere
Answer:
i am in the southern hemisphere
Explanation:
Answer:
its winter ................
neon sign transformer has a 460W AC output with an rms voltage of 15 kV when connected to a normal household outlet. There are 500 turns of wire in the primary coil. How many turns of wire does the secondary coil have
Answer:
The number of turns in the secondary coil is 62,500 turns.
Explanation:
Given;
power of the transformer, P = 460 W
output voltage, V₂ = 15 kV = 15,000 V
input voltage of normal household outlet, V₁ = 120 V
number of turns in the primary coil, N₁ = 500 turns
number of turns in the secondary coil, N₂ = ?
Apply the following the transformer equation;
[tex]\frac{N_2}{N_1} = \frac{V_2}{V_1}\\\\N_2 = \frac{V_2}{V_1}*N_1\\\\N_2 = \frac{15000}{120}*500\\\\N_2 = 62500 \ turns[/tex]
Therefore, the number of turns in the secondary coil is 62,500 turns.
Two objects, A and B, have the same volume and are completely submerged in a liquid, although A is deeper than B. Which object, if either, experiences the greater buoyant force?
a. Object B, because the closer an object is to the surface, the greater is the buoyant force.
b. Both objects experience the same buoyant force.
c. Object A, because, being at a greater depth, it experiences a greater pressure.
Answer:it would probably be C
Explanation:
During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. If the trebuchet launches the stones with a velocity of +48.5" m"/s at an angle of 42.0°, how long does it take the stone to hit the ground? For those settings, what is the maximum range? How high will the stones go? Show all your work
Answer:
a) t = 6.62 s
b) x = 238.6 m
c) H = 53.7 m
Explanation:
a) We can find the time of flight as follows:
[tex] y_{f} = y_{0} + v_{0_{y}}t - \frac{1}{2}gt^{2} [/tex]
Where:
[tex]y_{f}[/tex] is the final height = 0
[tex]y_{0}[/tex] is the initial height = 0
[tex]v_{0_{y}}[/tex] is the initial vertical velocity of the stone
t: is the time
g: is the gravity = 9.81 m/s²
[tex] v_{0}sin(42)t - \frac{1}{2}gt^{2} = 0 [/tex]
[tex] 48.5 m/s*sin(42)*t - \frac{1}{2}9.81 m/s^{2}*t^{2} = 0 [/tex]
By solving the above quadratic equation we have:
t = 6.62 s
b) The maximum range is:
[tex] x = v_{0_{x}}t = 48.5 m/s*cos(42)*6.62 s = 238.6 m [/tex]
c) The maximum height (H) can be found knowing that at this height the final vertical velocity of the stone is zero:
[tex] v_{f_{y}}^{2} = v_{0_{y}}^{2} - 2gH [/tex]
[tex] H = \frac{v_{0_{y}}^{2} - v_{f_{y}}^{2}}{2g} = \frac{(48.5 m/s*sin(42))^{2} - 0}{2*9.81 m/s^{2}} = 53.7 m [/tex]
I hope it helps you!
A piston above a liquid in a closed container has an area of 0.75m^2, and the piston carries a load of 200kg. What will be the external pressure on the upper surface of the liquid?
Answer:
2613.3 pa
Explanation:
p=F/A
p=ma/A
p=200×9.8/0.75
p=2613.3
Arrange an 8-, 12-, and 16-Ω resistor in a combination that has a total resistance of 8.89 Ω pls with de work
A wagon having a mass of 32 kg is accelerated across a level road at 0.50 m/s2 . What net force acts on the wagon horizontally?
Answer:
16 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 32 × 0.5
We have the final answer as
16 NHope this helps you
How many electrons and how many protons
are in an atom of Fluorine?
19
10
9
Explanation:
a fluorine atom has nine protons and electrons so it is electrically neutral
Answer:
no bloody idea
Explanation:
???
Based on the information in the passage, What is true of gases
Answer:
that gases are gases
Explanation:
Answer:
A. Some, but not all gases are harmful to humans.
Explanation:
If it takes Jeff 3 hours and 33 minutes to drive 500 miles, what is his average velocity over this time?
Answer:
141 mphExplanation:
aver. velocity = distance over time
= 500 miles
3 hours + (33 min. x 1 hr. )
60 min.
= 500 miles
3.55 hours
= 140.845 ≈ 141 miles / hour
Atoms of elements in the same group of the periodic table share the same
Answer:
Atoms of elements in the same group of the periodic table share the same ELECTRONS
Explanation:
May I have brainliest please? :)
Please help me on this
Answer:
Explanation:
read the assignment and use this
Topic sentence
Evidence from the text
Thoughts in your own words
Opinion
Wrap up sentence
T
E
T
O
W
and 2 of those make 2 paragraphs
1. A ball is launched horizontally at 40 m/s while 6.0 m above a level field . How far will the ball move horizontally before striking the ground ?
Answer:
44 m
Explanation:
Given that,
Horizontal velocity of the ball, u = 40 m/s
It is 6 m above the level field.
We need to find the distance covered by the ball when move horizontally before striking the ground. Let it is d.
Firstly, we will find time taken for the ball to hit the ground. Using second equation of motion as follows :
[tex]s=ut+\dfrac{1}{2}at^2[/tex]
Put u = 0 and a = g
[tex]s=\dfrac{1}{2}gt^2\\\\t=\sqrt{\dfrac{2s}{g}} \\\\t=\sqrt{\dfrac{2\times 6}{9.8}} \\\\t=1.1\ s[/tex]
No finding the horizontal distance as follows :
d = ut
d = 40 m/s × 1.1 s
d = 44 m
So, the ball will move 44 m horizontally before striking the ground.
After school, you watch your friend Katie run to a truck as soon as she hears the truck's music playing. Later, you find out the truck is the ice cream vendor's vehicle. How would a behaviorist interpret Katie's running to the truck?
Katie has been conditioned to the music and has associated the musical truck with serving ice cream.
Katie uses the music as a test of her biological reflexes.
Katie feels empathetic for the man driving the ice cream truck in such hot weather and wants to take him a drink of water.
Katie remembers the pattern of the music and knows the truck is too far away to reach unless she runs.
Answer:
A- Katie has been conditioned
Explanation:
Katie has associated the ice cream truck music with something positive like ice cream that makes her happy. it's kinda like a dog clicker, whenever a dog hears the click they know that click means a treat, which is the same for Katie, ice cream jingle means treat.
Which expression can be used to calculate centripetal acceleration?
4p2r/T2
4p2r/T
2pr/T
(2pr)2/T2
Answer:
What is the magnitude of the centripetal acceleration of a car following a curve of radius 500 m at a speed of 25.0 m/s (about 90 km/h)? Compare the acceleration with that due to gravity for this fairly gentle curve taken at highway speed. See Figure 2a.
Strategy
Because v and r are given, the first expression in
a
c
=
v
2
r
;
a
c
=
r
ω
2
a
c
=
v
2
r
;
a
c
=
r
ω
2
is the most convenient to use.
Solution
Entering the given values of v = 25.0 m/s and r=500 m into the first expression for ac gives
a
c
=
v
2
r
=
(
25.0
m/s
)
2
500
m
=
1.25
m/s
2
a
c
=
v
2
r
=
(
25.0
m/s
)
2
500
m
=
1.25
m/s
2
.
Discussion
To compare this with the acceleration due to gravity (g = 9.80 m/s2), we take the ratio of
a
c
g
=
(
1.25
m/s
2
)
(
9.80
m/s
2
)
=
0.128
a
c
g
=
(
1.25
m/s
2
)
(
9.80
m/s
2
)
=
0.128
. Thus, ac=0.128 g and is noticeable especially if you were not wearing a seat belt.
Explanation:
Consider a 75.5-kg man standing on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.65 m/s in 0.675 s. What does the spring scale register in pounds during these 0.675 s?
Answer:
208.08 pounds
Explanation:
Given that,
Mass of a man, m = 75.5 kg
Starting from rest, the elevator ascends, attaining its maximum speed of 1.65 m/s in 0.675 s.
We need to find the value of spring scale during these 0.675 s.
As the elevator ascends, net force will be given by :
F = mg + ma
a can be calculated as follows :
[tex]a=\dfrac{1.65-0}{0.675}\\\\a=2.45\ m/s^2[/tex]
So,
F = 75.5[(9.81) + (2.45)]
F = 925.63 N
We know that,
1 N = 0.224 Pounds
It means, 925.63 N = 208.08 pounds
So, the spring scale will register 208.08 pounds.
A 5000 kg meteorite falls toward the earth. What is the magnitude of the earth's acceleration just before impact? The earth's mass is 5.98 × 10^24 kg.
Answer:
8.193x10^-21m/s²
Explanation:
We have it that the gravitational force that is acting on this object is equal to the earth's gravitational force.
We start by using this formula
Ma = mg
We make a the subject of formula
a = mg/M
m = 5000kg
g = 9.8
M = 5.98x10^24kg
mg = 5000x9.8
= 49000
49000/5.98x10^24
= 8.193x10^-21m/s²
The magnitude of the earth's acceleration is 8.20 × 10^27
The parameters given in the question are;
mass= 5000 kg
g= 9.81
earth's mass= 5.98 × 10∧ 24
The formula is
= mass × acceleration due to gravity/earth's mass
= 5000 × 9.81/ 5.98^24
= 49,050/5.98 × 10^24
= 8.20 × 10^27
Hence the magnitude of the earth's acceleration just before impact is 8.20 × 10^27
Please see the link below for more information
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4. Name three things that all games, no matter where they are played around the world, have in common.
Answer:
Key components of games are goals, rules, challenge, and interaction.
Explanation:
Hope I helped.
Answer:
the name of the games are goals, rules, challenges and interaction and mabe there can be more.
Explanation:
I hope this helped your day better this is the correct answer i got it correct on the test.
At what speed do a bicycle and its rider, with a combined mass of 110 kgkg , have the same momentum as a 1400 kgkg car traveling at 6.0 m/sm/s
Answer:
76.36m/sExplanation:
Step one:
given data
let the mass of the rider be m,=110kg
let the velocity be v=?
let the mass of the car be M,=110kg
let velocity of the car V=6m/s
Step two:
the momentum of an object is given by the expression
P=mv
Step two:
since the two the bicycle rider must have the same momentum as the car,
then we need to equate their momentum
mv=MV
110*v=1400*6
110v=8400
divide both sides by 110 to find v
v=8400/110
v=76.36m/s
The rider is expected to have a speed of 76.36m/s
A 310 kg car is parked in a parking garage. If the car has 35,944 J of potential energy, how many
meters above ground is the car?
Gravitational potential energy is the energy stored in an object as the result of its vertical position or height. It can be calculated as its weight times the height. This is:
[tex]\boxed{U_g=W\cdot h=mgh}[/tex]
Where:
W is the weight of the objectm is the massg is gravitational accelerationh is the heightSolving for the h:
[tex]h=\dfrac{U_g}{mg} = \dfrac{35944\;J}{310\;kg\cdot 9.8\;m/s^2} = 11.8\;m[/tex]
R/ The car is parked 11.8 m above ground
how do you believe the brain works to help you learn and grow
Answer:
I think
Explanation:
the brain grows more when you learn something new, and less when you practice things you already know. i think- lol
Help me
An atomic nucleus suddenly bursts apart (fission) into two pieces. Piece A with mass mA travels to the left with a speed of vA. Piece B with mass mB travels to the right with speed vB. Show the velocity of piece B in terms of mA, mB and VA.
Solution:
Consider that the nucleus is not acted by an external force. Thus, momentum is conserved, so: pBf + pAf = 0
Substituting the expression for momentum results to
mBv (_______) + (_________) mAv (______) = 0
Deriving the expression for the velocity of piece B results to
v(_____) =(mA/m ______)vA
Answer:
[tex]v_{B} = \frac{m_{A}v_{A}}{m_{B}}[/tex]
Explanation:
We can apply the law of conservation of momentum on the nucleus in its initial and final state of nucleus:
Initial Momentum = Final Momentum
momentum of nucleus before bursting = momentum of piece A + momentum of Piece B
[tex](m_{nucleus})(velocity of nucleus) = m_{A}v_{A} + m_{B}v_{B}\\[/tex]
since, nucleus was initially at rest. Therefore,
velocity of nucleus = 0 m/s
and due to opposite direction of forces:
Vb = - Vb
Therefore,
[tex](m_{nucleus})(0) = m_{A}v_{A} - m_{B}v_{B}\\\\m_{A}v_{A} = m_{B}v_{B}\\\\v_{B} = \frac{m_{A}v_{A}}{m_{B}}[/tex]
What will happen to the speed of the Greenhouse effect if all the methane trapped in the permafrost is released into the
earth's atmosphere?
Answer:
The atmosphere would become warmer
Explanation:
methane absorbs the suns heat, therefore warming the atmosphere. if all the methane from the premafrost melted, would would have a huge large scale global warming, the giant increase of temperature could have devistating effects on all life on our planet.
How many degrees should a planet move across the sky when completing one revolution around the Sun?
Answer: 18o degrees
Explanation: :)
The planet should move across the sky when completing one revolution around the Sun is 180 degrees.
What is Planet?Planets are large, spherical celestial objects that are neither stars nor their leftovers. The nebular hypothesis, which states that an interstellar cloud collapses out of a nebula to create a young protostar orbited by a proto-planetary disk, is the best theory currently available for explaining planet formation.
More than 5,000 exoplanets, as they are known, were found as a result of further astronomical advancements. These consist of hot Jupiter's, which are enormous planets that revolve around their parent.
The steady accumulation of matter accelerated by gravity, or accretion, is how planets expand within this disk. There are at least eight planets in the Solar System, including the gigantic planets Jupiter, Saturn, Uranus, and Neptune as well as the terrestrial planets Mercury, Venus, Earth, and Mars.
Therefore, the planet should move across the sky when completing one revolution around the Sun is 180 degrees.
To know more about Planet:
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In 1926 Babe Ruth hit a home run that was estimated to have landed 180. meters from home plate and to have reached a height of 21.3 meters. What was the initial velocity of the ball?
Answer:
v = 47.85 m / s , θ = 64.7º
Explanation:
This is a missile throwing exercise.
Let's find the speed to reach the maximum height, at this point the vertical speed is zero
[tex]v_{y}^{2}[/tex] = v_{oy}^{2} - 2 g y
0 = v_{oy}^{2} - 2gy
v_{oy} = √2gy
let's calculate
v_{oy} = √ (2 9.8 21.3)
v_{oy} = 20.43 m / s
now we can calculate the time it takes to get to this point
vy = v_{oy} - g t
t = v_{oy} / g
t = 20.43 / 9.8
t = 2.08 s
in projectile launching, the time it takes for the body to rise is the same as the time it takes to go down, so the total launch time is
[tex]t_{v}[/tex] = 2 t
t_{v} = 2 2.08 = 4.16 s
let's use the horizontal throw ratio
x = v₀ₓ t_{v}
v₀ₓ = x / t_{v}
v₀ₓ = 180 / 4.16
v₀ₓ = 43.27 m / s
initial velocity is
v = √ (v₀ₓ² + v_{oy}^{2})
v = √ (20.43² + 43.27²)
v = 47.85 m / s
with an angle of
tan θ = I go / vox
θ = tan⁻¹ (43.27 / 20.43)
θ = 64.7º
A 0.5 kg ball is thrown horizontally towards a wall with a speed of 10 m/s. The initial velocity is chosen to be the positive x -direction for this question. The ball horizontally rebounds back from the wall with a speed of 10 m/s in the negative x -direction. What is momentum of the ball before it hits the wall, p? What is momentum of the ball after it hits the wall, p,? What is the change in momentum of the ball, delta p? (Give both magnitude and direction for each answer.) Is momentum conserved for the ball?
Explanation:
Step one:
given dara
mass of ball m=0.kg
initial velocity u= 10 m/s
final velocity v=10m/s
Required
momentum before and after impact
the expression for momentum P
P=mv
before impact
P=mv
P1=0.5*10
P1=5(kg⋅m/s)
after impact
P=mu
P2=0.5*10
P2=5(kg⋅m/s)
change in momentum is =P1-P2= 5-5=0
yes, momentum is conserved.
a baseball was thrown with an initial velocity of 14 m/s at an angle above the horizontal . It remained in the air for 2 s. Which of the following quantities was constant while the baseball was in the air?
Answer:
Explanation:acceleration
If a baseball was thrown with an initial velocity of 14 m/s at an angle above the horizontal. It remained in the air for 2 seconds, then the acceleration of the object would remain constant while the baseball was in the air.
What is a projectile motion?It can be defined as the motion of any object or body when thrown from the earth's surface and follows any curved path under the effect of the gravitational force of the earth.
As given in the problem a baseball was thrown with an initial velocity of 14 m/s at an angle above the horizontal. It remained in the air for 2 seconds.
Thus, If a baseball was thrown with an initial velocity of 14 m/s at an angle above the horizontal. It remained in the air for 2 seconds, then the acceleration of the object would remain constant while the baseball was in the air.
Learn more about projectile motion here, refer to the link given below ;
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Of the pairs of galaxies listed in the answer choices, which is the closest to the Milky Way Galaxy?
Answer:
Andromeda galaxy
Explanation:
Answer:
Andromida galaxy
Explanation:
In 4 billion years the milky way and the Andromida galaxy will collide with each other
A student is planning to make changes to a circuit. Which change will
increase the resistance?
A. Replace the wire with one that is longer.
B. Swap ne positions of the battery and the switch.
C. Replace the wire with one that is shorter.
D. Swap the positions of the lightbulb and the switch.
Answer:
A)
Explanation:
This is because the longer the wire is, the more resistance there is for the electricity to run through.
The student can increase the resistance by replacing the wire with one that is longer. Thus, option A is correct.
What is Ohm's law?The voltage across a conductor, according to Ohm's law, is precisely proportional to the current that passes through it.
A wire's resistance is inversely correlated with its cross-sectional area and directly correlated with its length. Most conductors have a resistance to the flow of an electric current through them. As the wire's length increases, the resistance in the wire rises.
However, according to Ohms law V=IR, a wire's length increases its resistance while decreasing its current for a given potential difference (voltage).
Therefore, replacing the wire with a longer one will increase resistance if a student plans to modify a circuit.
Thus, option A is correct.
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as a result of photosynthesis is the production of sugar molecules known as what?
Answer:
Glucose
Explanation:
Answer:
Check in your science textbook