Answer:
1. By streching
2. false
3. building stronger muscles and bones
4. riding your bike
Explanation:
The routine of exercise begins with the usual basic step of stretching the body.
What is meant by exercise ?An essential component of a healthy lifestyle is exercise. Exercise can help you cope with stress and prevent health issues while also enhancing energy and strength. It can also help you control your appetite and keep your weight in a healthy range.
Here,
1. The routine of exercise begins with the usual basic step of stretching the body.
2. People don't have to necessarily go to the gym to get exercise, because exercise includes the activities from the basic one to difficult methods. So, you can do some kind of exercise at the home itself. So, the statement is false.
3. An advantage to exercising is building stronger muscles and bones.
4. Riding your bike is an example of exercise.
Hence,
The routine of exercise begins with the usual basic step of stretching the body.
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A wire that is 0.36 meters long moves perpendicularly through a magnetic field at a speed of 0.21 meters/second. The induced emf produced in the wire is 0.45 volts. What is the magnetic field strength?
A.
0.034 newtons/amp·meter
B.
0.17 newtons/amp·meter
C.
0.26 newtons/amp·meter
D.
0.77 newtons/amp·meter
E.
6.0 newtons/amp·meter
Answer:
the answer is letter D.
Explanation:
i hope this is help
Answer:
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Explanation:
What is the force on a current-carrying wire that is in a magnetic field of 5.41*10-5 T if the current is 22.84 A and the length of the wire is 31.71 m
Answer:
3.918*10^-2N
Explanation:
force=magnetic flux*current*length
force=5.41*10^-5*22.84*31.71
force=3.918*10^-2N
When observed from Earth, some stars appear red. What is the cause of redshift?
A.The star is at rest relative to Earth.
B. The star is in a very distant location and is moving away from Earth.
C. The star is moving toward Earth at decreasing speed.
D. The star is moving toward Earth at increasing speed.
Answer:
B
Explanation:
This is the discovery of redshift that led scientist to say the universeis still expanding
how long would it take for a resultant upward force of 100N to increase the speed of 50kg object from 100m/s to 150m/s
Answer:
25 sec
Explanation:
F = ma
100 = 50 a
a = 2 m/s^2
vf = vo + at
150 = 100 + 2 t
50 = 2 t
t = 25 sec
What is the current in a circuit with a 9.0 v battery and a resistance of 36.0 ω? 0.25 a 4.0 a 45 a 324 a
The currrent flowing the circuit with the given voltage and resistance is 0.25 Ampere.
Option A) 0.25A is the correct answer.
What is Ohm's Law?Ohm’s law states that "the potential difference between two points is directly proportional to the current flowing through the resistance.
It is expressed as;
V = I × R
Where V is the voltage or potential difference, potential difference, I is the current and R is the resistance.
Given that;
Voltage in the circuit V = 9.0VResistance R = 36.0ΩCurrent I = ?We substitute our given values into the expression above.
V = I × R
9.0V = I × 36.0Ω
I = 9.0V / 36.0Ω
I = 0.25A
Therefore, the currrent flowing the circuit with the given voltage and resistance is 0.25 Ampere.
Option A) 0.25A is the correct answer.
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Find the mass of a child who runs at a speed of 4 m/s to get a pizza with extra cheese. His momentum is 120 kg•m/s.
The volume of empty space between gas particles is.
Answer:
either atoms or molecules
why is the importance and need of environmental science increasing in today world
Environmental science enlightens us on how to conserve our environment in the face of increasing human population growth and anthropogenic activities that degrade natural resources and ecosystems.
Explanation:
The scope of environmental studies is very wide and it deals with many areas like:
(i) Conservation of natural resources,
(ii) ecological aspects,
(iii) pollution of the surrounding natural resources,
(iv) controlling the pollution,
(v) social issues connected to it, and
(vi) impacts of human population on the environment.
How is energy transformed In a washing machine
Answer:
In earlier washing machine, the electrical energy is converted in rotational kinetic energy. Now a days, in washing machine, the electrical energy is converted in kinetic energy then the mechanical energy is converted into heat energy. In modern machines, we can wash and dry the clothes.
Suppose we observe a cepheid variable in a distant galaxy. The cepheid brightens and dims with a regular period of about 10 days. What can we learn from this observation?.
Answer:
something is passing infront of it
Explanation:
something is orbiting it and blocking its light
Describe the relationship between the Law of Conservation of Matter and balancing equations.
Answer:
The mass of the products and reactants are the same on both sides of the equation.
The number of atoms of products and reactants are equal and hence it proves the law of conservation of mass.
.
Detailed Explanation:
The Law of Conservation of Mass states that "In a chemical reaction, matter is neither created nor destroyed.". We balance chemical equations in order to satisfy the Law of Conservation of Mass. Balanced chemical equations show that mass is conserved in chemical reactions. In a balanced equation, there will be same number of each type of atom on both sides of the arrow.Which of the following is true about ionic bonds?
O a. They form crystals.
O b. They are hard.
O c. They have high boiling points.
O d. All of the above.
Answer:
c . they have high boiling points
The speed of sound doubles from 330 m/s to 660m/s going from air to a vibrating tuning fork.
Compare the frequency and wavelength of the wave in these 2 mediums.
Lets learn the relationship
[tex]\\ \rm\dashrightarrow \lambda=\dfrac{v}{\nu}[/tex]
[tex]\\ \rm\dashrightarrow \nu=\dfrac{v}{\lambda}[/tex]
[tex]\\ \rm\dashrightarrow \nu\propto \lambda\propto v[/tex]
Hence.
frequency and wavelength will be. doubled also
a vector has a magnitude of 355m and a direction of 30.0 degrees. What is the x component of the vector?
Answer:
307.44 m (whatever 'm' is)
Explanation:
355 * cos (30) = 307.44
An electromagnetic wave has a frequency of 8.2 x 10¹⁴ Hz. What is the wavelength of the wave?
Explanation:
Given parameters:-
Frequency of EMW is - 8.2 x 10¹⁴ HzTo find:-
Wavelength([tex]\lambda[/tex])?Solution:-
Here , we are provided frequency of electromagnetic wave and we have to find the wavelength of the wave. To find the wavelength we have to divide the speed of light by given frequency. therefore,
[tex]\tt\red{wavelength( \lambda)= \frac{speed(c)}{frequency(f)}}[/tex]
[tex] \rightarrow \sf \: \lambda = \frac{3 \times {10}^{8} }{8.2 \times {10}^{14} } \\ \\ \rightarrow \sf \: \lambda = \frac{3 \times {10}^{8} \times {10}^{ - 14} }{8.2} \\ \\ \rightarrow \sf \: \lambda = 0.36 \times {10}^{6} \\ \\ \rightarrow \sf \: \lambda = 36 \times {10}^{4}m[/tex]
Scientists in the laboratory create a uniform electric field e⃗ = 6. 0×105 k^v/m in a region of space where b⃗ =0⃗
Scientist in the laboratory create uniform electric field.
PART A: The electric field in rocket frame is (0,0, 6.0 × 10 ⁵).
PART B: The magnetic field in the rocket frame is 7.3 × 10⁻⁶ j∧ .
What is uniform electric field?The electric field whose strength is not changing with respect to time is called uniform magnetic field.
The electric field is 6.0 × 10 ⁵ k^v/m and the magnetic field is zero.
E' = E + (V×B)
= 6.0 × 10 ⁵ + (1.1 × 10⁶ × 0)
E' = 6.0 × 10 ⁵ k∧
(Ex , Ey, Ez) = (0,0, 6.0 × 10 ⁵)
The new magnetic field is represented as
B' = B - 1 /c²(v × E)
=0 - 1 / (3× 10⁸)²(1.1 × 10⁶ i∧ × 6.0 × 10 ⁵k∧ )
B' = 7.3 × 10⁻⁶ j∧
PART A: The electric field in rocket frame is (0,0, 6.0 × 10 ⁵).
PART B: The magnetic field in the rocket frame is 7.3 × 10⁻⁶ j∧ .
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a high efficiency shower can save... 1. water 2. energy 3. both ?
Answer:
both
Explanation:
You'll use less water....less hot water so water and energy are saved
Find the equivalent resistance of this circuit. First, what is the equivalent resistance, Req(23), of the parallel combination of R2 and R3?
[tex]R_{eq(23)} = \left(\dfrac 1{R_2} + \dfrac{1}{R_3}\right)^{-1}\\\\\\~~~~~~~~~= \left( \dfrac 1{200} + \dfrac 1{300} \right)^{-1}\\\\~~~~~~~~~=\left( \dfrac{5}{600} \right)^{-1}\\\\\\~~~~~~~~~=\dfrac{600}5\\\\\\~~~~~~~~~= 120~ \Omega[/tex]
Step-by-step explanation :
Here we have to calculate the equivalent resistance of the parallel combination between R2 and R3.
As we know that,
1/Rp = 1/R2 + 1/R3 ... n>> 1/Rp = (1/200) + (1/300)
>> 1/Rp = (300 + 200 / 600)
>> 1/Rp = 500 / 600
>> 1/Rp = 5 / 6
>> Rp = 6 / 5
>> Rp = 1.2Ω
Therefore,
Resistance in parallel combination is of 1.2ΩUse the energy equation from this week’s notes, your answer from
An energy equation is a chemical equation which involves the energy that is evolved or absorbed in the reaction.
What is energy?The term energy refers to the ability to do work. An energy equation is a chemical equation which involves the energy that is evolved or absorbed in the reaction.
This question is incomplete as the former energy equation is not shown. However, such equations can be used to know an endothermic or exothermic reaction.
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Because sound waves vibrate longitudinally, what can result?
A. Disruptions of fixed waves
B. Changes in the density of air
C. Pressure differences where compressions are rarefied
D. Regions of high pressure and low pressure
Answer:
D
Explanation:
toke the test Regions of high pressure and low pressure
Who developed a way to measure speed
The distance from the center of a ferris wheel to a passenger seat is 12 m. What centripetal acceleration does a passenger experience when the wheel's angular speed is 0. 50 rad/s?
A passenger experiences centripetal acceleration when there is circular motion around a center. The centripetal acceleration is 3 m/s².
What is centripetal acceleration?The centripetal acceleration is the acceleration acting when a body is moving on a circular path. It is acted towards the center of the path. Centripetal acceleration is the product of the square of angular speed and radius of path.
a =ω²r
Given the radius of path r is 12 m and angular speed ω is 0.50 rad/s².
The resulting centripetal acceleration is
a = (0.50)²×12
a = 3 m/s²
Thus, the centripetal acceleration is 3 m/s².
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A 3kg mass is dropped from a height of 12m. What is the KE as it strikes the ground?
Explanation:
Givenmass=3kg
height=12m
and all of them now
gravity=9.8m/S2
required
k.e = ?
solution
k.e=p.e
so p.e=MGH
p.e=MGH
=3kg*9.8m/S2*12m
=352.8kg m2/S2
=352.8 J
so we said p.e=k.e
therefore 352.8 J = k.e
Find the moment of inertia iz ofa tetrahedron of constant density
The moment of inertia of the tetrahedron will be 435.75,Moment of inertia is found by the application of integration.
What is a moment of inertia?The sum of the products of the mass of each particle in the body with the square of its distance from the axis of rotation expresses a body's tendency to resist angular acceleration.
The moment of inertia of a tetrahedron of constant density is found as;
[tex]\rm I_Z = \int\limits^a_b {dz} \, dv \\\\ dv=dxdy\\\\ I_Z = \int_0^9 \int_0^{8-\frac{8x}{9}} \int_0^{5-\frac{5x}{9} -\frac{5x}{8} }(x^2+y^2)dzdy[/tex]
After applying the limit, we get the answer is;
[tex]\rm I_Z= \frac{1743}{4} \\\\ I_Z= 435.75[/tex]
Hence, the moment of inertia of tetrahedron will be 435.75
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If a ball has a speed of 10 m/s and a momentum of 2.5 kg∙m/s,
what is its mass?
0.25 kg
Explanation:
[tex]p = m \times v \\ 2.5 = m \times 10 \\ m = \frac{2.5}{10} \\ \boxed{m = 0.25} [/tex]
What is the energy source in each picture?
Answer:
Explanation:
Discussion
The top picture should be obvious. The rope is tied at one end. The person holding it provides energy in the form of vibrations moving up and down the way the diagram is shown. The wave can also be created by the rope moving sideways.
The bottom picture is much harder. T energy is provided by the forefinger. It has to move. If you just stick your finger in the water, all that will happen is that you will move some water (very little in the scheme of things.
So the energy is provided by a moving forefinger.
Recall that Hubble's law is written v = H0d, where v is the recession velocity of a galaxy located a distance d away from us, and H0 is Hubble's constant. Suppose H0 = 20 km/s/Mly. How fast would a galaxy 1000 Mly distant be receding from us?
Hubbles' law is applicated on galaxies. The galaxy which is 1000 Mly distant from us has the speed 20000 km/s.
What is Hubble's law?Hubble's law is defined as the galaxies are moving away from Earth at speeds proportional to their distance.
Hubble's law is written as
v = H₀d
Here v is the recession velocity of a galaxy located a distance d away from us, and H₀ is Hubble's constant.
Suppose H₀ = 20 km/s/Mly.
1 parsec = 3.08 ₓ 10¹⁶ m
1 M parsec = 3.08 ₓ 10²² m
The speed v of the galaxy is
v = 20 ₓ 1000
v = 20000 km/s
Thus, the galaxy which is 1000 Mly distant from us has the speed 20000 km/s.
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how long does it take to do 278J of work with 17 W of power
Answer:
t= 278/17 =16.35s
Explanation:
p=w/t
t=w/p
∴t=278/17
Answer:
t=16.4
Explanation:
power = energy/time
p=e/t
17=278/t
t=278/17
t=16.352941
t=16.35
t=16.4
Copper wire is 1. 9 mm in diameter and carries a current of 20 a. What is the electric field stregnth inside this wire?
The electric field strength will be 0.6252 V/m. It is the strength at which the field is created by charges.
What is electric file strength?The electric field strength is defined as the ratio of electric force and charge.
The electric field strength is found as;
[tex]\rm E = \frac{I \rho }{A} \\\\ \rm E = \frac{20 \times 1.68 \times 10^{-8} }{ (0.6385 \times 10^{-6}} \\\\ E= 0.5262 \ V/m[/tex]
Hence, the electric field strength will be 0.6252 V/m.
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Find the voltage drop between points A and B in the circuit. [?] V 106 A 30 Ω 40 Ω B 50 Ω 20Ω 10Ω
[tex]30 \Omega || 40\Omega ~ \text{and}~50\Omega || 30 \Omega\\\\\text{Equivalent resistance of the whole circuit,}\\ \\R_{eq} = \left(\dfrac{30 \times 40}{30+40} \right) + \left( \dfrac{50 \times 30}{50+30} \right)\\\\\\~~~~~~=\dfrac{1005}{28}~ \Omega\\\\\text{By Ohm's law,}\\\\~~~~~V=IR\\\\\implies I = \dfrac{V}{R} = \dfrac{9}{\tfrac{1005}{28}} = \dfrac{252}{1005}= \dfrac{84}{335}~ A\\\\ \text{Voltage drop between points A and B,}\\\\V_{AB} = IR_{AB}\\\\\\[/tex]
[tex]~~~~~~~=\dfrac{84}{335} \cdot \left(\dfrac{30 \times 40}{30+40} \right)\\\\\\~~~~~~~= \left( \dfrac{84}{335} \right) \left(\dfrac{120} 7 \right)\\\\\\~~~~~~~=\dfrac{288}{67}~V\\\\\\~~~~~~~=4.298~V[/tex]