Answer:
See below
Explanation:
Torgue = f * distance basically ...so if you want to increase torque with same f then the distance ( lever arm) must be increased
To increase the torque applied on a lever without exerting any more force, the length of the lever arm must be increased.
What is meant by torque?Torque is defined as the rotational analogue of force. It is the product of the applied force and the perpendicular distance.
Here,
A lever is a simple machine composed of a stiff beam and a fulcrum. Both the load and the effort are applied to the beam's ends (input force and output force, respectively).
The location on which the beam pivots is known as the fulcrum. When a force is exerted on one end of a lever, the opposite end of the lever experiences a load.
The expression for the torque acting on a lever arm is given by,
Torque, τ = Length of lever arm x Force applied
τ = L x F
From the equation, it is clear that the torque acting on the lever arm is directly proportional to its length.
τ ∝ L
Therefore, as the length of the lever arm increases, the torque applied also increases.
Hence,
To increase the torque applied on a lever without exerting any more force, the length of the lever arm must be increased.
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Explain why we say that energy from the washing machine is wasted' as thermal energy?
Explanation:
In washing machine, the electrical energy is converted in kinetic energy then the mechanical energy is converted into thermal (heat) energy.
Water is streaming downward from a faucet opening with an area of 3.0 x 10-5 m2. It leaves the faucet with a speed of 5.0 m/s. The cross sectional area of the stream 0.50 m below the faucet is:
The cross sectional area of the stream 0.50 m below the faucet is 2.54 x 10⁻⁵ m².
Speed of the water 0.5 m below the faucetThe speed of the water at the lower level is determined using Bernoulli's equation as follows;
P₀ + ρgΔh + ¹/₂ρv₁² = P₀ + 0 + ¹/₂ρv₂²
ρgΔh + ¹/₂ρv₁² = ¹/₂ρv₂²
gΔh + ¹/₂v₁² = ¹/₂v₂²
9.8(0.5) + ¹/₂(5)² = ¹/₂v₂²
2(17.4) = v₂²
34.8 = v₂²
v₂ = √34.8
v₂ = 5.9 m/s
Continuity equationA₁v₁ = A₂v₂
A₂ = A₁v₁ /v₂
A₂ = (3.0 x 10⁻⁵ x 5) / (5.9)
A₂ = 2.54 x 10⁻⁵ m²
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5 A train of mass 1.5 X 105 kg is travelling at 40 ms-' when the brakes are applied and it decelerates steadily. The train travels a distance of 250 m before coming to a halt. (a) Calculate the deceleration of the train. (b) Find the average braking force.
Answer:
a)3.2m/s^2
b) -480,000N
Explanation:
mass of train= 150,000kg
velocity of train=40m/s
acceleration is negative
v^2=u^2-2as
v=0m/s
u=40m/s
s=250m
0=1600-500a
500a=1600
deceleration of 3.2m/s^2
newton's second law
F=ma
F= (150,000× -3.2)
F= -480,000N
general effects of global warming
Answer:
Warmer temperatures over time are changing weather patterns and disrupting the usual balance of nature. This poses many risks to human beings and all other forms of life on Earth.Changes in temperature cause changes in rainfall. This results in more severe and frequent storms. They cause flooding and landslides, destroying homes and communities, and costing billions of dollars.Water is becoming scarcer in more regions. Droughts can stir destructive sand and dust storms that can move billions of tons of sand across continents. Deserts are expanding, reducing land for growing food. Many people now face the threat of not having enough water on a regular basis.How would you compare the direction of the motion of the reflected pulse with respect to the incident pulse
The direction of the motion of the reflected pulse is inverted to that of the incident pulse.
What is a Pulse?This is a physics term which refers to the single disturbance that moves through a transmission medium.
The reflected pulse is inverted so the direction is from right to left while that of the incident pulse is from left to right.
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Noah plans on using a pendulum to determine the height of a tower. He attaches a mass to the end of a thin cord hanging from the tower's ceiling (let's assume the cord almost touches the ground). Noah determines the period of oscillation to be 12 s. How high is the tower?
The height of the tower is 35.75 m.
What is height?Height is the vertical distance between two points.
To calculate the height of the tower, we use the formula below.
Formula:
T = 2π√(L/g)............ Equation 1Where:
T = Period of oscillationπ = PieL = height of the towerg = acceleration due to gravity.From the question,
Given:
T = 12 sg = 9.8 m/s²π = 3.14Substitiute these values into equation 1 and solve for L
12 = 2(3.14)√(L/9.8)12 = 6.28√(L/9.8)√(L/9.8) = 12/6.28√(L/9.8) = 1.91L/9.8 = (1.91)²L/9.8 = 3.6481L = 9.8×3.6481L = 35.75 mHence, the height of the tower is 35.75 m.
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Which phase of the moon is shown?
full moon
first quarter
waning gibbous
waxing crescent
What has 8 protons 10 neutrons and 10 electrons
A battery supplies ________ to the circuit.
Answer:
Electrical energy
Explanation:
Hope It helps you
Although time is one of those concepts which we are all familiar with, it is difficult to define. We can say it is what is measured by a clock or that it is nature's way of seeing that everything does not happen at once.
What are your Thoughts on this?
do you think time is real?
Explanation:
time is nature's expression of change.
every change takes time.
it takes time to e.g. move from A to B.
at one point of time the universe is in one state, then some change happens, and the universe is in another state, and we have another point of time.
without time there is no change, without change there is no time.
A corona is a circle of light that can be seen around the Moon during a solar eclipse.
O True
False
1. What could be the structure in the volcano that serves as a source of
geothermal energy?
A. Caldera
B. Magma chamber C. Summit D. Vent
Answer:
it is magma chamber
Explanation:
How does fission differ from fusion?
Explanation:
Fission is the splitting of a heavy, unstable nucleus into two lighter nuclei, and fusion is the process where two light nuclei combine together releasing vast amounts of energy.
Light of different colors is emitted from different stars because :.
Answer:
Different temperatures
Explanation:
During which two moon phases would the amount of light reflected from the moon appear to be equal from Earth? Why does this occur at different times in a month? (AKS6a, DOK 3)
A.
The light reflected appears the same during the new moon and full moon phases because the sun, moon and Earth are aligned.
B.
The light reflected appears the same during the new moon and first quarter moon phases because the sun, moon and Earth are at the same angles.
C.
The light reflected appears the same during the full moon and third quarter moon phases because the sun, moon and Earth are at the same angles.
D.
The light reflected during the first quarter and third quarter moon phases appears equal because the sun, moon and Earth are at right angles.
The moon phase shows that D. light reflected during the first quarter and third quarter moon phases appears equal because the sun, moon and Earth are at right angles.
What is a moon phase?It should be noted that the moon phase simply means the portion of the moon that we can see from the Earth.
In this case, the light reflected during the first quarter and third quarter moon phases appears equal because the sun, moon and Earth are at right angles.
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A solid disk of mass (M) and radius (R) rolls without slipping with a linear speed of (v). Find the maximum vertical height (h) to which it can roll if it goes up an incline. Answer in terms of M, R, v, and g.
(I assume g is for gravity)
Answer:
1/2 M V^2 = M g H
Initial kinetic energy equals final potential energy
H = V^2 / (2 g) satisfies given conditions
A 2-column table with 3 rows. The first column titled metal has entries aluminum, iron, lead. The second column titled density (grams per cubic centimeter) has entries 2.64, 7.50, 11.34.
You have discovered a meteorite that seems to be metallic. Its mass is 370 g, and you calculate the volume to be 50 cm3. Based on the three values provided, which metal would most likely match the composition of the meteorite?
aluminum
iron
lead
none of these (density is less than 1.0)
Iron,
I really hope this helped you
Explanation:
Answer:
Its just Cork and wax
Explanation:
I just did it on edge trust me
Choose all the answers that apply.
Earth:
takes longer than 365 days to orbit the sun
has the most circular orbit in the solar system
has the largest satellite relative to its planet
has seasons because of a tilted axis
is a perfect sphere
Answer:
takes longer than 365 days to orbit the sun
has seasons because of a tilted axis
Note: We see 365 days for a year - from an external point of view, a year would take 366 days to orbit the sun - this is because it takes slightly less than 24 hours from sunrise to sunrise because of the rotation of the earth about the sun (a sidereal year is 366 days as compared to 365 days observed on earth)
A small bar magnet pulls on a larger one with a force of 79 Newtons.
What is the magnitude of the force the larger one exerts on the smaller one?
Answer in units of N.
Answer:
79 N ( the same)
Explanation:
2. It is to bring down the foot forcibly to the f a heavy step) with or without weight. 2 Ormain lateral position - This is done at sho
A body travels a distance of 20m in the 7th second and 24m in the 9th second. How much distance shall it travel in the 15th second?
Answer:
36 m
Explanation:
We can consider this to be an AP.
Then,
a₇ = 20a₉ = 24Subtract a₇ from a₉.
a + 8d - a + 6d = 24 - 202d = 4d = 2a + 6(2) = 20a = 8Finding a₁₅
a₁₅ = a + 14da₁₅ = 8 + 14(2)a₁₅ = 8 + 28a₁₅ = 36 mFind rate of change
f(9)-f(7)/9-724-20/9-74/22m/sSo
Distance travel in 6 s
Speed×Time6(2)12mDistance in 15s:-
12+2436mThe zone in which the greatest total mass of co2 is absorbed from the atmosphere.
The top layer is the zone in which the greatest total mass of co2 is absorbed from the atmosphere.
What is exosphere?The exosphere is the uppermost layer of Earth's atmosphere, located between 700 and 10,000 kilometers above the surface and merging with the solar wind at its summit.
The exosphere is a narrow, ambience space that surrounds a planetary contains particles that are gravitational forces connected to that body yet have such a low density that they are effectively collisionless.
Hence, the top layer is the zone in which the greatest total mass of co2 is absorbed from the atmosphere.
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An electon in a box absorbs light. The longest wavelength in the absorbtion spectrum is 700 nm . How long is the box
Answer:
8.01 (10^-10) m
Explanation:
use the Particle in a box equation
E = (n^2) (h^2) / (8 m (L^2))
and energy of a particle as its wavelength equation
h c / lamda = E
combine the equations to get
h c / lamda = (n^2) (h^2) / (8 m (L^2))
get L alone
L^2 = (2^2 - 1^2) h lamda / 8 m c
the longest wavelength is produced by a jump from the first excited state to the ground so
n = 2 to n = 1
so
L^2 = (n1^2 - n2^2) h lamda / (8 m c)
h = 6.6(10^-34) J*s
c = 3(10^8) m/s
m = 9(10^-31) kg
lamda = 700(10^-9) m
n1 =2
n2=1
Which pair of triangles can be proven congruent by the hl theorem?
The pairs of triangles that can be proven congruent by the hl theorem is the right angled triangle.
What is mearnt be the HL theorm?The HL theorem is also known as the Hypothenus Leg theorem, it states that "the hypotenuse and leg of one right triangle are congruent to the hypotenuse and leg of another right triangle, then the two triangles are congruent."
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Answer:
B
Explanation:
The table shows the speed of ultrasound waves in different tissues in the human body.
Tissue
Speed
(m/s)
Air 330
Fat 1,450
Water 1,480
Liver 1,550
Kidney 1,560
Blood 1,570
Muscle 1,580
Bone 4,080
What happens to an ultrasound wave that moves from muscle to bone?
(1 point)
The frequency of the wave decreases.
The frequency of the wave increases.
The wavelength of the wave decreases.
The wavelength of the wave increases
Answer:
the frequency of the wave increases
Answer:
The wavelength of the wave increases
Explanation:
Just did the test
Suppose you are pushing a stalled car. As the gets going, you need less and less force to keep it going. For the first 15 m, your force decreases at a constant rate from 210.0 N to 40.0 N. How much work did you do on the car? Draw a force-displacement graph to represent the work done during this period.
Answer:
1875 j
Explanation:
f * d = work
your AVERAGE force is (210+ 40)/2 = 125 N
125 * 15 = 1875 j
The work done during this period will be 1875 J.. if the body is displaced in the same direction of the force it will be positive.
What is work done?Work done is defined as the product of applied force and the distance through which the body is displaced on which the force is applied.
Work may be zero, positive and negative.it depends on the direction of the body displaced
The given data in the problem is;
F is the average force applied by the worker
d is the displacement = 15 m
The average force is ;
[tex]\rm F_{AVG} = \frac{F_1+F_2}{2} \\\\ F_{AVG} = \frac{210+40}{2} \\\\ F_{AVG}=125 \ J[/tex]
The work done by the worker will be;
[tex]\rm W= Fd \\\\\rm W= F_{AVG}d \\\\W= 125 \times 15 \\\\ \rm W=1875 \ J[/tex]
Hence the work done during this period will be 1875 J.
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Two copper spheres of the same radius, one solid and the other hollow, are charged to the same potential. Which will have more charge?
(a) Solid sphere
(b) Hollow sphere
(c) Both will have an equal charge
(d) None of these
C
Let's see how
We know the rule
[tex]\\ \rm\rightarrowtail V=\dfrac{Kq}{r}[/tex]
[tex]\\ \rm\rightarrowtail Kq=vr[/tex]
[tex]\\ \rm\rightarrowtail q\propto r[/tex]
As radius is same charge will be same in both
Hence they both have same charge
Atoms with certain characteristics are radioactive. Which of those below will
always be radioactive?
A. all atoms with more neutrons than protons
B. all atoms with an atomic number under 83
C. all atoms with fewer neutrons than protons
D. all atoms with an atomic number over 83
Answer:
D. all atoms with an atomic number over 83
If Frequency F, velocity v, and density D are considered fundamental units, the dimensional formula for momentum will be :
Let's see
Momentum be P
[tex]\\ \rm\Rrightarrow P=[Frequency]^a[velocity]^b[Density]^c[/tex]
[tex]\\ \rm\Rrightarrow [P]=[F]^a[v]^b[D]^c[/tex]
[tex]\\ \rm\Rrightarrow [M^1L^1T^{-1}]=[T^{-1}]^a[L^1T^{-1}]^b[M^1L^{-3}]^c[/tex]
[tex]\\ \rm\Rrightarrow MLT^{-1}=T^{-a}L^bT^{-b}M^cL^{-3c}[/tex]
[tex]\\ \rm\Rrightarrow MLT^{-1}=T^{-a-b}L^{b-3c}M^c[/tex]
On comaparing
c=1So
b-3c=1b-3=1b=1+3b=4and
-a-b=-1-a-4=-1-a=-1+4=3a=-3So the unit is
DV⁴/F³Answer:
(Frequency)⁻³(velocity)⁴Density
Explanation:
See attachments.
What are two pieces of evidence that support the big bang theory?.