Answers
Answer:
3
5
4
Explanation:
x = (8=(9+9)
(9+9) = 4, 5, 3
Related Questions
What are the functions of stems? (Select all that apply.)
Stems absorb water from the soil.
Stems transport water and minerals.
Stems produce additional plants.
Stems help turn the leaves toward sunlight.
Answers
Explanation:
A. Stems absorb water from the soil.
B. Stems transport water and minerals.
Hope this helps you
have a good day.
Answer : Stems produce water and soil
And Stems help turn the leaves towards sunlight.
Explanation:
Because of this picture, (if its not obvious), the 2 ones that i got wrong, are not the answer, and the 2 in the middle are is the answer.
A certain spring stretches 15 cm when a load of 50.0 N is suspended from it. How much will the spring stretch if 78N is suspended from it
Answers
Answer:
23.4 cm
Explanation:
15 : 50 = x : 78
15*78 = 50x
x = 15*78/50 = 23.4 cm
The spring stretch is, 23.4 cm.
What is the stretch of the spring?Potential energy that is stored as a result of the deformation of an elastic item, such as the stretching of a spring, is known as elastic potential energy. It is equivalent to the work required to stretch the spring, which depends on both the length of the stretch and the spring constant, k.What happens to a spring when you stretch it?A spring exerts a force F = -kx in the direction of its equilibrium position when it is stretched or compressed to a length that differs by an amount x from its equilibrium length. A spring's force acts to return the spring to its equilibrium length; it is a restoring force.What causes a spring to stretch?A typical spring is a tightly wrapped metal coil or spiral that stretches when pulled (by applying force) and returns to its original shape when released (remove the force). A spring is elastic, in other words.
According to the question:
15 : 50 = x : 78.
15×78 = 50x.
x = 15×78/50.
= 23.4 cm.
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why should you have a good attitude School. 3 pages
Answers
Answer:
positive attitude lets you relax, remember, focus and absorb information as you learn. You're ready to welcome new experiences and recognize many different kinds of learning opportunities. And when you can see opportunities, hope increases.
What moves up and down in an antenna or transmitter to produce a radio wave?
Answers
Answer:
Radio waves move up and down in the antenna or transmister
Explanation:
19. Two objects of equal masses collide head-on while moving in the opposite directions and join together. Show that the fractional loss of original KE of the objects is given by the 1 expression.
E=(1/2)+(V1V2/V1²+V2²)
Answers
Answer:
Explanation:
mass of each object = m
momentum conservation: mv₁ + mv₂ = 2mv, so v = (v₁ + v₂)/2
Initial KE = mv₁²/2 + mv₂²/2 = m(v₁² + v₂²)/2
final KE = (2m)v²/2 = m(v₁ + v₂)²/4
Change in KE = m(v₁² + v₂²)/2 - m(v₁ + v₂)²/4 = m(v₁ + v₂)²/4
= m(v₁² + v₂² + 2v₁v₂)/4 = (1/2) m(v₁² + v₂²)/2 + mv₁v₂/2
Fraction loss = change in KE / initial KE = 1/2 + v₁v₂/(v₁² + v₂²)
______________ is the length of the space between two points.
A.
Time
B.
Velocity
C.
Speed
D.
Distance
Answers
Answer:
Distance
Explanation:
When using the length of the space between two points, the distance measures the length
Answer:
D.Distance
Explanation:
Determine the equivalent capacitance of the combination shown when C = 12 n
Answers
Hi there!
Recall the following.
Capacitors in series:
[tex]C_T = \frac{1}{C_1} + \frac{1}{C_2} +...+ \frac{1}{C_n}[/tex]
Capacitors in parallel:
[tex]C_T = C_1 + C_2 + ... + C_n[/tex]
Begin by solving for the resulting capacitance of both paths.
Path on the left:
[tex]\frac{1}{C_T} = \frac{1}{2C} + \frac{1}{C} = \frac{3}{2C}\\C_T = \frac{2C}{3}[/tex]
Path on the right:
[tex]\frac{1}{C_T} = \frac{1}{C} + \frac{1}{3C} = \frac{4}{3C}\\\\C_T = \frac{3C}{4}[/tex]
Now, since we ADD capacitors in parallel, we can add the resulting capacitances together:
[tex]C_T = \frac{2C}{3} + \frac{3C}{4}[/tex]
Substitute in 12 F for C and solve.
[tex]C_T = \frac{2(12)}{3} + \frac{3(12)}{4} = \frac{24}{3} + \frac{36}{4} = 8 + 9 = \boxed{17F}[/tex]
The period of a simple pendulum (T) is the time it takes for the pendulum to make one complete swing (a round trip). g is the acceleration due to gravity. You can do an experiment of measuring the period (T) as a function of string length (l). You linearize the equation so that you can plot your experimental data and and apply a linear trendline. The equation of the trendline has the form y = a x + b, where a is the slope and b is the y-intercept.
Required:
How do you use the slope to determine "little g" ?
Answers
Answer:
Please find the answer in the explanation
Explanation:
Given that an experiment of measuring the period (T) as a function of string length (l) is performed. To linearize the equation so that you can plot your experimental data and and apply a linear trendline,
The graph of length L will be plot against square of period T.
Given that the equation of the trendline has the form y = a x + b, where a is the slope which is equal to the acceleration due to gravity and b is the y-intercept.
When length L is plotted against square of period T, a linear graph will be achieved. The S.I unit of the slope will be m/s^2 which is acceleration g.
What is the net force acting on a car cruising at a constant velocity of 70 km/h (a) on a level road, (b) on an uphill road?
Answers
The net force on the car for either case will be zero, since the car is moving at a constant velocity.
Net force on the car
The net force on the car is the sum of all the forces acting on the car.
∑F = ma
When the car is on a level roadWhen the car is on a level road, the only two forces acting on the car is the applied force and frictional force of the road.
F - Ff = 0
The net force will be zero, since the car is moving at a constant velocity.
When the car is on uphillThe forces acting on the car at the uphill is the applied force, weight of the car acting downwards and the frictional force acting opposite direction.
F - Wsinθ - μFₙcosθ = 0
The net force will be zero, since the car is moving at a constant velocity.
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Why do water wet glass ?
Answers
Answer:
Forces of attraction between a liquid and a solid surface are called adhesive forces. ... Water wets glass and spreads out on it because the adhesive forces between the liquid and the glass are stronger than the cohesive forces within the water.
A passenger plane is travelling down the runway with a speed of 20\,\dfrac{\text{km}}{\text{h}}20 h km 20, start fraction, start text, k, m, end text, divided by, start text, h, end text, end fraction, then speeds up with constant acceleration over 2.4\,\text{km}2.4km2, point, 4, start text, k, m, end text over 59\,\text{s}59s59, start text, s, end text. We want to find the final velocity of the plane at the moment of take-off. Which kinematic formula would be most useful to solve for the target unknown?
Answers
Given that,
Initial speed, u = 20 km/s
Acceleration of plane, a = 2.4 km/h²
Time, t = 59 s
We need to find the expression to find the final velocity of an object.Let the final velocity is v.
Using the second equation of kinematics:
[tex]\Delta s=ut+\dfrac{1}{2}at^2[/tex]
a is acceleration, [tex]a=\dfrac{v-u}{t}[/tex]
So,
[tex]\Delta s=ut+\dfrac{1}{2}\times \dfrac{v-u}{t}\times t^2\\\\\Delta s=ut+\dfrac{1}{2}(v-u)t\\\\\Delta s=\dfrac{2ut+vt-ut}{2}\\\\\Delta s=\dfrac{vt+ut}{2}\\\\\Delta s=(\dfrac{v-u}{2})t[/tex]
We can use the above formula to find the final velocity (v) of the plane.
What is the force with which a body
is attracted by the earth towards its centre?
| वह कौन सा बल है जिसके कारण कोई भी
व्तुपर्थृवी के केंद्र की ओर आक र्तष होती है?
A : Mass | द्रव्यमान
B : Weight | भार
C : Volume | आयतन
D : Density | घनत्व
Ans:
B : Weight | भार
Answers
Answer:
Explanation:
Gravity
Gravity is the force by which a planet or other body draws objects toward its center. The force of gravity keeps all of the planets in orbit around the sun.
In some amazing situations, people have survived falling large distances when the surface they land on is soft enough. During a traverse of Eiger's infamous Nordvand, mountaineer Carlos Ragone's rock anchor gave way and he plummeted 515 feet to land in snow. Amazingly, he suffered only a few bruises and a wrenched shoulder. Assuming that his impact left a hole in the snow 3.5 ft deep, estimate his average acceleration as he slowed to a stop (that is while he was impacting the snow). Pick a coordinate system where down is positive.
Answers
Have you seen my dad?
Consider a 35-L evacuated rigid bottle that is surrounded by the atmosphere at 100 kPa and 22 ℃. A valve at the neck of the bottle is now opened and the atmospheric air is allowed to flow into the bottle. The air trapped in the bottle eventually reaches thermal equilibrium with the atmosphere as a result of heat transfer through the wall of the bottle. The valve remains open during the process so that the trapped air also reaches mechanical equilibrium with the atmosphere. Determine the net heat transfer through the wall of the bottle during this filling process. -pinterest\.\*
Answers
Answer:
3.5 KJ
Explanation:
Energy balance equation is given as;
E_in - E_out = ΔE_system
Thus;
Q_in = (m_2•u_2) - (m_i•h_i)
Now, m_i = m_2
Tbus;
Q_in = (m_2•u_2) - (m_2•h_i)
Q_in = m_2(u_2 - h_i)
Now mass of the air in the bottle is given as;
m_2 = (P_2•V)/(R•T2)
From table A-1 attached, R = 0.287 KJ/Kg.k
We are given;
P_2 = 100 kPa
V = 35 L = 0.035 m³
T2 = 22°C = 22 + 273 K = 295 K
Thus;
m_2 = (100 × 0.035)/(0.287 × 295)
m_2 = 0.04134 kg
Now, from table A-17 attached, at Temperature of 295 K, we have;
Internal energy; u2 = 210.49 KJ/Kg
Enthalpy; h_i = 295.17 KJ/Kg
From earlier, we saw that;
Q_in = m_2(u_2 - h_i)
Thus;
Q_in = 0.04134(210.49 - 295.17)
Q_in = -3.5 KJ
Thus, Q_out = 3.5 KJ
So, the net heat transfer = 3.5 KJ
A car accelerates from rest. It reaches a velocity of 25m/s in 10 seconds. What was the cars acceleration?
Answers
Answer:
We are Given:
initial velocity (u) = 0m/s
final velocity (v) = 25 m/s
time (t) = 10 seconds
acceleration (a) = a m/s/s
From the first equation of motion, we know that:
v = u + at
solving for a, we get:
a = (v-u) / t
now, plugging the given values in this equation
a = (25 - 0) / 10
a = 25 / 10
a = 2.5 m/s/s
Therefore, the acceleration of the car is 2.5 m/s/s
Select the correct answer.
Good posture is only important when you are exercising.
A.
True
B.
False
Answers
good posture is always important
A projectile in flight explodes into several fragments. The total momentum of the fragments immediately after this explosion: ___________
a. is the same as the momentum of the projectile immediately before the explosion
b. has been changed into kinetic energy of the fragments
c. is less than the momentum of the projectile immediately before the explosion
d. is more than the momentum of the projectile immediately before the explosion
e. has been changed into radiant energy
Answers
Answer:
answer is a.
Explanation:
Newton's first law: inertia
If you still can't get it, look at the book.
the conservation of momentum:
the total momentum of a system is conserved, provided that there is no external net force acting on the system.
The total momentum of a system is conserved. Therefore, the total initial momentum of a body after collision is equal to the total final momentum. Thus, option a is correct.
What is momentum ?Momentum of an object is the ability of an object to bring the force applied to make a maximum displacement. It is the product of its mass and velocity. Momentum is a vector quantity. It have both magnitude and direction.
The momentum in a collision is conserved. Thus total initial momentum is equal to the final momentum. Let m be the colliding mass and the u and v be the initial and final velocity.
Then, mu = m v after collision.
The initial momentum of the flight will be equal to the total momentum of the fragments immediately after the explosion. This is called conservation of momentum.
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who is the father of kinematics ?
explain +)
Answers
Answer:
FRANZ REULEAUX
Late 19th century kinematics and the theory of machines as seen through the contributions of the German engineering scientist, Franz Reuleaux (1829-1905), often called the "father of kinematics". Extremely famous in his time and one of the first honorary members of ASME, Reuleaux was largely forgotten in much of modern mechanics literature in English until the recent rediscovery of some of his work. In addition to his contributions to kinematics, we review Reuleaux's ideas about design synthesis, optimization and aesthetics in design, engineering education as well as his early contributions to biomechanics. A unique aspect of this review has been the use of Reuleaux's kinematic models at Cornell University and in the Deutsches Museum as a tool to rediscover lost engineering and kinematic knowledge of 19th century history of machine.
what is the distance of sun from earth?
Answers
Explanation:
Scientists sometimes call our region of space the "Goldilocks Zone" because it appears to be just right for life. As noted earlier, Earth's average distance to the Sun is about 93 million miles (150 million kilometers) from the Sun.
Find the resistance at 100°C of a silver wire 1 mm in diameter and 1000 centimetre long ?
Answers
Answer:
Ro=19.350 & R¹⁰⁰=26.703
Explanation:
What are the Economic importance of rusting of iron
Answers
Answer:
Rusting is the corrosion of iron which is the most widely used structural metal.
As a fish jumps vertically out of the water, assume that only two significant forces act on it: an upward force F exerted by the tail fin and the downward force due to gravity. A record Chinook salmon has a length of 1.50 m and a mass of 46.0 kg. If this fish is moving upward at 3.00 m/s as its head first breaks the surface and has an upward speed of 5.80 m/s after two-thirds of its length has left the surface, assume constant acceleration and determine the following.
a. The salmon's acceleration
b. The magnitude of the force F during this interval N
Answers
Answer:
a
[tex]a = 12.32 \ m/s^2[/tex]
b
[tex]F = 1017.52 \ N[/tex]
Explanation:
From the question we are told that
The length of the Chinook salmon is [tex]l = 1.50 \ m[/tex]
The mass of the Chinook salmon is [tex]m = 46.0 \ kg[/tex]
The upward velocity in water is [tex]u = 3.00 \ m/s[/tex]
The upward velocity in air is [tex]v = 5.80 \ m/s[/tex]
Generally from kinematic equations
[tex]v^2 = u^2 + 2as[/tex]
=> [tex] 5.80^2 = 3.00^2 + 2 * a * [ [\frac{2}{3} * l ][/tex]
=> [tex] 5.80^2 = 3.00^2 + 2 * a * [ [\frac{2}{3} * 1.5 ][/tex]
=> [tex] 5.80^2 = 3.00^2 + 2 * a * [1 ][/tex]
=> [tex]a = 12.32 \ m/s^2[/tex]
Generally magnitude of the force F during this interval in N is mathematically represented as
[tex]F = m (a + g )[/tex]
=> [tex]F = 46.0 (12.32 + 9.8 )[/tex]
=> [tex]F = 1017.52 \ N[/tex]
A person is sitting at the very back of a canoe of length L, when the front just bumps into the dock. show answer No Attempt 50% Part (a) If the canoeist gets up and walks to the front of the canoe and there is no friction between the boat and the water, how far will they be from the dock
Answers
The distance of the canoeist from the dock is equal to length of the canoe, L.
Conservation of linear momentumThe principle of conservation of linear momentum states that the total momentum of an isolated system is always conserved.
v(m₁ + m₂) = m₁v₁ + m₂v₂
where;
v is the velocity of the canoeist and the canoe when they are together
u₁ is the velocity of the canoeu₂ velocity of the canoeistm₁ mass of the canoem₂ mass of the canoeistDistance traveled by the canoeistThe distance traveled by the canoeist from the back of the canoe to the front of the canoe is equal to the length of the canoe.
Thus, the distance of the canoeist from the dock is equal to length of the canoe, L.
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An object increases its velocity from 20 m/s to 63 m/s in 10 s. What is the acceleration of the object?
Answers
Answer:
An object increases its velocity from 20 m/s to 63 m/s in 10 s. What is the acceleration of the object?
Explanation:
A heat engine that propels a ship produces 660 Btu/lbm of work while rejecting 300 Btu/lbm of heat. What is its thermal efficiency
Answers
This question involves the concepts of thermal efficiency.
The thermal efficiency of the heat engine is "68.75 %".
Thermal EfficiencyThe thermal efficiency of the heat engine can be given by the following formula:
[tex]\eta=\frac{W}{Q}[/tex]
where,
η = thermal efficiency = ?W = Work output = 660 Btu/lbmQ = Heat Input = W + Rejected Heat = 660 Btu/lbm + 300 Btu/lbm Q = 960 Btu/lbmTherefore,
[tex]\eta=\frac{660\ Btu/lbm}{960\ Btu/lbm}[/tex]
η = 0.6875 = 68.75 %
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10. The speed of a transverse wave is 15 m/s. The frequency of the wave is 2.5 Hz.
What is the wavelength? *
Answers
Answer:
Wavelength = 6m
Explanation:
Given that,
→ Transverse wave = 15 m/s
→ Frequency = 2.5 Hz
Then the required wavelength is,
→ Transverse wave ÷ Frequency
→ 15 ÷ 2.5
→ 15/2.5 = 6m
Hence, the wavelength is 6m.
In which position is it most likely that the spring has lost its elastic potential energy?
A.W
B.X
C.Y
D.Z
Answers
Answer:
w
Explanation:
its not being streched lol hope dis help
Option A is correct. At position W the spring will lose its elastic potential energy. When spring is extended or shortened, work is done. In the spring, elastic potential energy is stored.
What is the elastic potential energy of spring?When a spring is stretched or compressed, work is done. In the spring, elastic potential energy is stored.
The work done is equal to the elastic potential energy stored, assuming no inelastic deformation has occurred.
The potential energy of the spring is equal to the work done on the spring;
Potential energy = Work done
The mechanical potential energy contained in the structure of a material or physical system as it is forced to elastic deformation by work done on it is referred to as elastic energy.
When things are impermanently crushed, extended, or distorted in any way, elastic energy is released.
The mechanical potential energy stored in the configuration of a material or physical system as it is subjected to elastic deformation by work done on it is referred to as elastic energy.
At position W, the spring has zero deformation. So there should be no stretching causes the potential energy of the system is zero.
Hence option A is correct. At position W the spring will lose its elastic potential energy.
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How was the 6th quark discovered?
Answers
Answer:
A team of scientists in Geneva, headed by Professor of Physics Carlo Rubbia, has found evidence of a sixth kind of quark, one of the most sought after discoveries in modern physics. ... Rubbia developed this particular proton collision method and has been working with it since the late 1970s
A student in the Biomechanics class has decided that she would like to make her arms
stronger. She has a mass of 63 kg, She chooses to complete some elbow flexion exercises
using a kettlebell. For this problem, consider the hand and forearm to be a single segment.
The distance from her elbow to her wrist is 22.86 cm.
The force from the kettlebell is applied to her hand, which is 30.48 cm from her elbow joint.
She knows that the moment arm of the elbow extensor muscles about the elbow axis is
Answers
The resistive force from load of the kettle lifted by the arm is determined from principle of moment and the magnitude is 71 kg.
Moment of force about a pointThe moment of force about a point is the product of applied force and the perpendicular distance of the force action. The moment of force about a point is equal to the torque exerted by the force.
τ = Fr
where;
F is the resistance force of the kettler is perpendicular distanceF₁r₁ = F₂r₂
925(22.86) = F₂(30.38)
696 N = F₂
in kg, m = 696/9.8 = 71 kg
Thus, the resistive force from the applied force and distance is 71 kg.
The complete question is below:
If she wants the elbow flexors to exert 925 N of force during an isometric contraction, what should the resistance force be at 90 deg of flexion (the upper arm is vertical and the forearm is parallel to the ground) in kg
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anaerobic transmission is when you touch a contaminated surface true or false
Answers
Anaerobic transmission is when you touch a contaminated surface is a false statement.
What is anaerobic respiration?Anaerobic organisms are the living things that can survive and grow where there is no oxygen in the surrounding environment so we can conclude that Anaerobic transmission is when you touch a contaminated surface is a false statement.
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