Answer:
b. Float
Explanation:
If a body has specific gravity of less than 1, then it will float on water. To understand this we must understand relative density. That is the ratio of density of a substance to the density of reference material. We usually take water as reference material. Water has density 1g/cm³. It gravity is now less than 1 it will mean that It is less dense than water and hence float.
A wave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz. what wavelength is produced? 0.67 m 0.75 m 1.5 m 3.0 m
Explanation:
velocity = frequency × wave length
33 = 22 × wave length
wave length = 33 ÷ 22 = 1.5 m
this is the correct answer Step-by-step
I hope you understand...
can you please mark my answer
Answer:
C
Explanation:
EDGE22
Lana wanted to do an investigation to see what kind of birdseed the birds in her neighborhood like best. She purchased three of the same kind of bird feeder and three different kinds of birdseed. Next, she put one kind of birdseed in each of the feeders and placed them near each other outside. Over the next three days, she measured the level of seed in each feeder twice a day. What is the dependent variable in Lana's investigation?
Answer:
The level of seed in each feeder
Explanation:
The independent variable is the variable which is the suspected cause of an observation, it is the variable that produce the effect observed in the dependent variable. The dependent variable is the variable that is measured
The independent variable is normally the x-value while the dependent variable is the y-value
In the question, Lana wants to find out the kind of birdseed that the neighborhood birds like (to eat) the most by feeding them different types of birdseed and measuring the level of the birdseed in the feeders at regular intervals
the independent variable is the bird seed types which Lana gives to the birds, to determine the type of bird seeds the birds like
The dependent variable is the level of the seed in the feeder which depends on the type of seeds the birds like.
Do planets revolve slower or faster the closer they are from the sun?
Answer:
The speed at which a planet orbits the Sun changes depending upon how far it is from the Sun. When a planet is closer to the Sun the Sun’s gravitational pull is stronger, so the planet moves faster. When a planet is further away from the sun the Sun’s gravitational pull is weaker, so the planet moves slower in its orbit.
What are the 2 types of shadow
cast by the moon during a solar
eclipse?
Answer:
umbra, penumbra
Explanation:
Pls answer, i need help :(
Answer: B
Explanation: AN increase in heat out
A 1610 kg car is traveling east at 22. m/s and a 3100. kg minivan traveling west at a speed of 11.0 m/s
collide head on. Assuming a completely inelastic collision, what is the velocity in m/s of the “connected”
vehicle after the crash?
Answer:
Im pretty sure its 11 m/s east because it is 22 m/s hitting 11 m/s and the force is harder hitting
Explanation:
im not 100% sure becasue i did this stuff a while ago
Two students sit on either side of a teeter-totter that is 2.8 m in length.
The teeter-totter balances when the student on the left side is 1.1 m
from the center and the student on the right is 1.4 m from the center.
The total mass of the two students is 78 kg . Assume that the teeter-
totter itself pivots at the center and produces zero torque.
What is the mass of the student on the left side of the teeter totter
The mass of the student on the left side of the teeter totter is 43.68 kg
Law of moments
Since the teeter totter is in equilibrium, the sum of moments about its center of mass is zero. That is, the clockwise moment, M = anticlockwise moments, M'
Taking moments of the students weight about the center, we have
m₁gx₁ = m₂gx₂ where
m₁ = mass of student on left, x₁ = distance of student on left from center = 1.1 m, m₂ = mass of student on right, x₂ = distance of student on right from center = 1.4 m and g = acceleration due to gravity.m₁x₁ = m₂x₂
Given that their total mass is 78 kg, we have that m₁ + m₂ = 78.
So, m₂ = 78 - m₁
Substituting m₂ into the equation, we have
m₁x₁ = m₂x₂
m₁x₁ = (78 - m₁)x₂
Making m₁ subject of the formula, we have
m₁x₁ = 78x₂ - m₁x₂
m₁x₁ + m₁x₂ = 78x₂
m₁(x₁ + x₂) = 78x₂
m₁ = 78x₂/(x₁ + x₂)
Mass of student of left side of teeter totter
Substituting the values of the variables into the equation, we have
m₁ = 78x₂/(x₁ + x₂)
m₁ = 78 × 1.4 m/(1.1 m + 1.4 m)
m₁ = 109.2 kgm/2.5 m
m₁ = 43.68 kg
So, the mass of the student on the left side of the teeter totter is 43.68 kg
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Two charges lie on the x-axis, one at the origin and the other at 14.3m What is the potential (relative to infinity) due to these charges at a point at 7.1m measured from the origin on the x-axis?
Answer:
V = 2.52 10³ V
Explanation:
The electric potential for a point charge is
V = k ∑ \(\frac{q_i}{r_i}\)
In this case the formula is
V = k (\(\frac{q_1}{r_1} + \frac{q_2}{r_2}\))
distances are the absolute value
r₁ =√ (7.1 -0)² = 7.1 m
r₁ =√ (7.1 - 14.3)² = 7.2 m
we substitute
V = 9 10⁹ (q₁ / 7.1 + q₂ / 7.2)
we have two possibilities
* different charges
V = 9 10⁹ (q₁ / 7.1 + q₂ / 7.2)
* equal charges and same sign
q₁ = q₂ = q
V = 9 10⁹ q (1 / 7.1 + 1 / 7.2) = p 9 10⁹ 0.2797
V = 2.52 10⁹ q
if we assume a value of the charge, for example q = 1 10⁻⁶ c
V = 2.52 10⁹ 1 10⁻⁶
V = 2.52 10³ V
You are attempting to create a standing wave with n=7 in a pipe 0.50m in length and filled with air. the top of the pipe is open to the air and the bottom of the pipe is barely submerged in water and thus closed.
a) Draw the diagram for this standing wave with the proper number of nodes and antinodes for this open-closed pipe.
b) Calculate the frequency created by this standing wave assuming the air is at room temperature.
To create a standing wave with n=7 in a pipe of 0.50m length and filled with air, we need to use the formula v = nλf, where v is the speed of sound in air, n is the number of nodes, λ is the wavelength, and f is the frequency.
Since the top of the pipe is open and the bottom is closed, we have a node at the bottom and an anti-node at the top.
The wavelength can be calculated using the formula λ = 2L/n, where L is the length of the pipe. Substituting the values, we get λ = 2(0.50m)/7 = 0.14m.
The speed of sound in air at room temperature is approximately 343 m/s. Thus, we can calculate the frequency as follows:
v = nλf
f = v/(nλ)
f = 343/(7*0.14)
f = 347.6 Hz
Therefore, the frequency created by this standing wave with n=7 in a pipe of 0.50m length and filled with air at room temperature is approximately 347.6 Hz.
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Is it B? Not too sure about this one.
An object of mass 140kg is placed on an Orange tree 10m above the ground. 1. Calculate the Potential energy with respect to the ground.
Potential Energy - (Measured in Joules) - Potential energy is the energy that is stored in an object due to its position relative to some zero position.
Mass - (Measured in Kilograms) - Mass is the amount of matter in a body, regardless of its volume or the forces acting on it.
Acceleration Due to Gravity - (Measured in Meter/Square Second) - Acceleration due to gravity is the acceleration gained by an object due to the gravitational force.
Height - (Measured in Meters) - Height is the distance between the lowest and highest points of a standing person/shape/object.
An object of mass 140 kg is placed on an Orange tree 10m above the ground. 1. Calculate the Potential energy with respect to the ground.Data:
m = 140 kg
h = 10 m
g = 9.8 m/s²
Ep = ?
The formula to calculate potential energy:
Ep = m * g * h
Ep = Potential energym = massh = heightg = gravityWe clear, but it is not necessary, since we want to calculate the potential energy.
Ep = m * g * h Ep = 140 kg * 9.8 m/s² * 10 m Ep = 13720 JThe reason why it is given in Joules is because N * m, are units of Joules, and N = Kg * m/s^2. It is the ratio of the Joules.
The potential energy of the body of mass m = 140 kilograms and located at height h = 10 meters is equal to 13720 Joules.
1. What is the wave speed of a wave that has a frequency of 100 Hz and a wavelength of 0.30 m?
30 m/s
2. What is the wave speed of a wave that has a frequency of 50 Hz and a wavelength of 0.10 m?
0.772m
3. What is the frequency of a wave that has a wave speed of 20 m/s and a wavelength of 0.50 m?
40 Hz
4. What is the frequency of a wave that has a wave speed of 80 m/s and a wavelength of 0.20 m?
5. What is the frequency of a wave that has a wave speed of 120 m/s and a wavelength of 0.40 m?
6. What is the wavelength of a sound wave that has a speed of 340 m/s and a frequency of 440 Hz?
7. What is the wavelength of a sound wave that has a speed of 340 m/s and a frequency of 880 Hz?
8. What is the wavelength of a sound wave that has a speed of 250 m/s and a frequency of 400 Hz?
9. What is the wave speed of a wave that has a frequency of 50 Hz and a wavelength of 2.0 m?
10. What is the wave speed of a wave that has a frequency of 100 Hz and a wavelength of 0.50 m?
Answer:
1. v = 30 m/s
2. v = 5 m/s
3. f = 40 Hz
4. f = 400 Hz
5. f = 300 Hz
6. λ = 0.772 m
7. λ = 0.386 m
8. λ = 0.625 m
9. v = 100 m/s
10. v = 50 m/s
Explanation:
The relationship between frequency, wavelength, and speed of a wave is given by the following formula:
\(v = f\lambda\)
where,
v = speed of wave
f = frequency of wave
λ = wavelength
1.
f = 100 Hz
λ = 0.3 m
Therefore,
v = (100 Hz)(0.3 m)
v = 30 m/s
2.
f = 50 Hz
λ = 0.1 m
v = (50 Hz)(0.1 m)
v = 5 m/s
3.
v = 20 m/s
λ = 0.5 m
\(f = \frac{v}{\lambda} = \frac{20\ m/s}{0.5\ m}\)
f = 40 Hz
4.
v = 80 m/s
λ = 0.2 m
\(f = \frac{v}{\lambda}=\frac{80\ m/s}{0.2\ m}\)
f = 400 Hz
5.
v = 120 m/s
λ = 0.4 m
\(f = \frac{v}{\lambda}=\frac{120\ m/s}{0.4\ m}\)
f = 300 Hz
6.
v = 340 m/s
f = 440 Hz
\(\lambda = \frac{v}{f}=\frac{340\ m/s}{440\ Hz}\\\)
λ = 0.772 m
7.
v = 340 m/s
f = 880 Hz
\(\lambda = \frac{v}{f}=\frac{340\ m/s}{880\ Hz}\\\)
λ = 0.386 m
8.
v = 250 m/s
f = 400 Hz
\(\lambda = \frac{v}{f}=\frac{250\ m/s}{400\ Hz}\\\)
λ = 0.625 m
9.
f = 50 Hz
λ = 2 m
v = (50 Hz)(2 m)
v = 100 m/s
10.
f = 100 Hz
λ = 0.5 m
v = (100 Hz)(0.5 m)
v = 50 m/s
Answer:
it B
Explanation:
I KNOW IT
A block of metal of density 3000 kg/m3 is 2m high and stands on a square base of side 0.5 m. Calculate:
1.The area of the base of the block
2.The volume of the block
3.Mass of the block
4.Weight of the block
5.The pressure exerted by the block
Answer:
1) A = 0.25 m², 2) V = 0.5 m³, 3) m = 1500 kg, 4) W = 14700 N,
5) P = 58800 Pa
Explanation:
1) The area of the base is square
A = L²
A = 0.5²
A = 0.25 m²
2) The block is a parallelepiped
V = A h
V = 0.25 2
V = 0.5 m³
3) Density is defined
rho = m / V
m = rho V
m = 3000 0.5
m = 1500 kg
4) The weight of a body is
W = mg
W = 1500 9.8
W = 14700 N
5) The pressure is
P = F / A
in this case the force is equal to the weight of the body
P = 14700 / 0.25
P = 58800 Pa
(1) The area of the base of the block is 0.25 m².
(2) The volume of the block is 0.5 m³.
(3) The mass of the block is 1500 kg.
(4) The weight of the block is 14,700 N.
(5) The pressure exerted by the block is 58,800 N/m²
The given parameters;
density of the block, ρ = 3000 kg/m³height of the block, h = 2 mside of the base, b = 0.5 mThe area of the base of the block is calculated as follows;
\(A = 0.5 \ m \ \times 0.5 \ m\\\\A = 0.25 \ m^2\)
The volume of the block is calculated as follows;
\(V = Ah\\\\V = 0.25 \times 2\\\\V = 0.5 \ m^3\)
The mass of the block is calculated as follows;
\(\rho = \frac{m}{V} \\\\m = \rho V\\\\m = 3000 \times 0.5\\\\m = 1500 \ kg\)
The weight of the block is calculated as follows;
\(W = mg\\\\W = 1500 \times 9.8\\\\W = 14,700 \ N\)
The pressure exerted by the block is calculated as follows;
\(P = \frac{F}{A} \\\\P = \frac{14,700}{0.25} \\\\P = 58,800 \ N/m^2\)
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Three 20.0 ohm resistors are
connected in parallel. What is their
equivalent resistance?
(Unit = ohm)
Answer:
6.67 ohm
Explanation:
From the question given above, the following data were obtained:
Resistor 1 (R₁) =20 ohm
Resistor 2 (R₂) = 20 ohm
Resistor 3 (R₃) = 20 ohm
Equivalent Resistance (R) =?
Since the resistors are arranged in parallel connection, the equivalent resistance can be obtained as follow:
1/R = 1/R₁ + 1/R₂ + 1/R₃
1/R = 1/20 + 1/20 + 1/20
1/R = (1 + 1 + 1) / 20
1/R = 3/20
Invert
R = 20/3
R = 6.67 ohm
Therefore, the equivalent resistance is 6.67 ohm.
What is the minimum force required to increase the energy of a car by 69 J over a distance of 42 m? Assume the force is constant.
Group of answer choices
0.61 N
69 N
2900 N
1.6 N
110 N
"the majority of working teens are employed by restaurants, grocery stores, and department stores." what is the subject in this sentence? majority teens employed stores
The appropriate subject in this sentence is "the majority of working teens."
Remember that a sentence's subject is typically a noun. The word or phrase that denotes an object, identifies a person or location, etc. is known as the subject.
The predicate of the sentence is "Employed by restaurants, grocery stores, and department stores."
The predicate, which can describe an action or a state of being, frequently follows the subject.
The verb acts as the "are" between the subject and predicate. It links or connects the sentence's subject with a word that renames or describes it, making it a linking verb.
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Which of these describes a real image?
a car with a mass of 2,00 kg travels a distance of 400 m as it moves from one stoplight to the next . as its fastest , the car travels at 18 m/s. what is its kinetic energy at this point?
Answer:
32400 J
Explanation:
K.E.=(1/2)(200)(18^2)
PLEASE HELP WILL GIVE BRANLIEST, EXTRA POINTS!
Jailah needs a replacement for lithium for a science experiment. She tries silicon, but it does not work. Using what you know about patterns in the periodic table, which advice would you give Jailah?
A. Try a lanthanide series element.
B. Try a non-metal from the halogen group.
C. Try an element in the same group as lithium.
D. Try an element in the same period as lithium.
Answer:
C. Try an element in the same group as lithium.
Explanation:
Answer:
The answer is C.
Explanation:
I'm took the test on it
Imagine that you are in a space station in the vacuum of outer space, far from any planet. There is no air in space, so there is no friction. There is also very little gravity. You throw a ball out the door of the space station. Use Newton's first law of motion to predict what will happen to the motion of the ball.
Answer:
The ball will continue to move at a constant speed forever until another force stops it.
Explanation:
Newton's first law of motion can be seen as a law of inertia. It explains that an object at rest or in a state of uniform motion will remain in that state unless it is acted upon by an external force.
Following the above, when the ball is thrown into space, the ball will continue to move with the velocity with which it was thrown until it comes in contact with another object that stops it. If this does not happen, it will continue to drift forever at that velocity.
to lift
With a pulley system, you use more rope (distance), but need less (blank) to lift
the load
Ok so it is working ok!
On a curved roadway of radius 95m, the speed limit is 12 m/s. What should the coefficient of static friction be between the tires and the road for the car to safely navigate the curve at the posted speed?
Please please help.
The coefficient of static friction between the tires and the road is 0.16.
What is the coefficient of kinetic friction?The coefficient of static friction between the tires and the road for the car to safely navigate the curve at the posted speed is calculated as follows;
Static friction = centripetal force
μmg = mv²/r
μ = ( v² ) / ( rg)
where;
μ is the coefficient of static frictiong is acceleration due to gravityr is the radius of the curved pathv is the maximum speed of car on the pathThe coefficient of static friction between the tires and the road is calculated as follows;
μ = ( 12² ) / ( 95 x 9.8)
μ = 0.16
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arrange 6.002, 6.023, 6.302, 6.020 from least to greatest
WILL MARK BRAINLIEST
Answer:
6.002
6.020
6.023
6.302
Explanation:
Which part of the planet had the highest concentration of ozone in 1989?
Answer:
earth
sorry I need points but I don’t know the answer again I’m really sorry
On a summer day, Thomas is standing in his driveway waiting for his mother. Energy from the Sun is making Thomas feel hot. This energy is being transmitted by three different methods. Which of the following is an example of convection?
Answer:
A. Energy streaming through space toward Thomas
Explanation:
its correct did it on a test
What two factors determine the density of a fluid?
Answer:
Mass and volume.
Explanation:
The equation for density is always mass divided by volume. To determine the density of a fluid, you would need to find its volume and its mass.
A square metal plate 0.180 m on each side is pivoted about an axis through point O at its center and perpendicular to the plate. (See the figure below (Figure 1) .)
Calculate the net torque about this axis due to the three forces shown in the figure if the magnitudes of the forces are F1 = 17.0 N, F2 = 27.0 N, and F3 = 13.0 N. The plate and all forces are in the plane of the page. (N.m)
the answer 1.73 is incorrect
The net torque to that axis due to three forces is 2.554 Nm.
How to calculate the net torque?\(F_1\) = forces 1 = 17 N
\(F_2\) = forces 2 = 27 N
\(F_3\) = forces 3 = 13 N
α = side of metal plate = 0.18 m
Net torque can be calculated by multiple the forces by distance. For the question, the \(F_1\) will be negative because the forces of \(F_3\) will move the square metal plate to that side.
Net torque = \(-F_1\frac{a}{2} + F_2\frac{a}{2} + F_3 sin(45)\frac{a}{2} + F_3 cos(45)\frac{a}{2}\)
= \(-17\frac{0.18}{2} + 27\frac{0.18}{2} + 13sin(45)\frac{0.18}{2} + 13 cos(45)\frac{0.18}{2}\)
= -1.53 + 2.43 + 0.827 + 0.827
= 2.554 Nm.
Thus, the net torque for that three forces shown in the figure is 2.554 Nm.
You question is incomplete, but most probably your full question was
(image attached)
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Is water wet?
I need an argument.
Answer:
no :)
Explanation:
ezzzzzzzzzzzzzzzzzzzz
Liquid water is not itself wet, but can make other solid materials wet. Wetness is the ability of a liquid to adhere to the surface of a solid, so when we say that something is wet, we mean that the liquid is sticking to the surface of a material.
Which layer of the sun is where plasma rises and sinks due to temperature differences?.
Answer:
Just beneath the photosphere, and extending inward to about 0.7 Rsun, is the convection zone. Energy generated in the core of the Sun moves outward through this layer by a boiling motion in which hot plasma rises, releases some of its energy, cools, and then sinks again.
Explanation:
The two waves shown here are the same distance from point X and are traveling toward each other.
An illustration with a crest 2.0 centimeters high traveling to the right and a second 2.0 centimeters trough traveling toward the left toward point X in the material.
What is the amplitude of the resulting wave when the two waves meet at point X?
0.0 cm
1.0 cm
2.0 cm
4.0 cm
Answer:
(C) on edge.
Explanation:
Answer:
2.0
Explanation:
trust the process.