Answer: Stars are formed in dust clouds and are found in most galaxies.
Explanation:
Answer: Stars form inside relatively dense concentrations of interstellar gas and dust known as molecular clouds.
Explanation:
2) Which of the following characteristics is associated
with high energy for a mechanical wave?
a) low amplitude
b) high amplitude
c) low frequency
d) long period
e) long wavelength
Answer:
The correct answer should be high amplitude : )
Explanation:
A high energy wave is characterized by a high amplitude, a low energy wave is characterized by a low amplitud
Use the table to answer the question.
A
B
formed by oscillating source
formed by vibration of charged particles
requires a medium to transmit energy
can transmit energy through a vacuum
examples include sound waves
examples include light waves
What should column A be titled?
(1 point)
seismic waves
mechanical waves
surface waves
electromagnetic waves
Answer:
Mechanical Waves
Explanation:
I took the practice
Write out the solution to the following problem: Find the force of an object with a mass of 5 kg and an acceleration of 3 m/s2.
Answer:
15 N
Explanation:
Force=mass x acceleration
15= 5 x 3
Answer: 15N
Explanation:
If the object has a mass of 5kg and accelerates 5m/s^2, force that is applied to move the object is simply the product of mass and acceleration.
A square loop of wire lies in the plane of the page. A decreasing magnetic field is directed into the page. The induced current in the loop is
A square loop of wire lies in the plane of the page. A decreasing magnetic field is directed into the page. The induced current in the loop is maximum and clockwise.
What is Magnetic field?The region of space where an object experiences a magnetic force towards it is called magnetic field.
The change in magnetic field induces the current. This induced current again opposes the original magnetic field in the opposite direction. The original magnetic field is decreasing into the page. So, magnetic field of induced current will have to add it and into the page.
Thus, the induced current in the loop is maximum and clockwise.
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The study of properties of matter, energy and of their mutual relationships is called
Explanation:
The study of properties of matter, energy and of their mutual relationships is called physics
150N
V
nail
0.50 m
wood
pivot
The man applies a force of 150 N at a distance of 0.50m from the pivot.
Calculate the moment of this force about the pivot. Include a unit.
The distance between Carol's house and her uncle's house is 24 km. What is her speed in kilometers per hour in order to get to her uncles house in 40 minutes by motorcycle.
Carol's speed in kilometers per hour in order to get to her uncles house in 40 minutes by motorcycle is 36km/hr.
How to calculate average speed?The average speed of a moving body can be calculated by dividing the distance moved by the time taken.
According to this question, the distance between Carol's house and her uncle's house is 24 km. The speed it will take her to get to her uncle's house in 40 minutes by motorcycle is as follows:
Average speed = 24km ÷ 40/60 hour
Average speed = 36km/hr
Therefore, Carol's speed in kilometers per hour in order to get to her uncles house in 40 minutes by motorcycle is 36km/hr.
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The amount of energy that would be needed to accelerate a large spaceship to half the speed of light is:.
At a known mass of the spaceship, the amount of energy that would be needed to accelerate the spaceship to half the speed of light is 1.5 x 10⁸ x m (J).
Energy neededThe amount of energy that would be needed to accelerate a large spaceship to half the speed of light is calculated as folllows;
E = mc²
where;
m is mass of the spaceshipc is speed of light = 3 x 10⁸ m/shalf the speed of light = 1.5 x 10⁸ m/s
E = 1.5 x 10⁸ x m
Thus, at a known mass of the spaceship, the amount of energy that would be needed to accelerate the spaceship to half the speed of light is 1.5 x 10⁸ x m (J).
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How do the amplitudes of a 120 decibel sound and a 100-decibel sound compare?
Under what conditions do gases follow the ideal gas law
Answer:
According to sciences, when under moderate pressure and temperature, gases tend to follow the ideal gas law.
The cluster of galaxies that our own galaxy belongs to is called the.
Answer:
The Local Group/ Virgo Cluster
Explanation:
Our solar system is part of a galaxy called the Milky Way galaxy. The Milky Way galaxy is part of a small cluster of just over 30 galaxies known as the "Local Group." This cluster resides in a larger cluster of galaxies called the "Virgo Cluster" (sometimes called the Virgo Supercluster). The Virgo cluster contains just about 2000 galaxies.
Could 2 students do different amounts of work and have the same power, why?
Answer:
Power is defined as Work / Time
P1 = P2 = W1 / T1 = W2 / T2 W1 and W2 are not necessarily the same Power expended depends on both work input over a unit of time
You find 6.21 g of diamonds. You measure that the diamonds have a volume of 1.77 ml. What is the
density of diamonds, and where would the diamonds fit into your density column?
Answer:
3.51 g/mL
Explanation:
Density can be found using the equation: density = mass / volume.
In this case, mass is given in grams (g) and volume is given in milliliters (mL).
You can find the density of the diamonds by plugging the given values into the formula and simplifying.
Density = mass (g) / volume (mL)
Density = 6.21 g / 1.77 mL
Density = 3.51 g/mL
Sonar is a device that uses reflected sound waves to measure underwater depths. If a sonar signal has a wavelength of 5.9 m and the velocity of sound in water is 15 m/s, what is the frequency of the signal?
The frequency of the signal is = 2.5 Hz
Calculation of frequencyThe wavelength of the sonar device = 5.9 m
The velocity of the sound = 15 m/s
The frequency = ?
But the formula for the velocity of sound wave = frequency × wavelength
Male frequency the subject of formula,
f = v/ wavelength
f = 15/5.9
f = 2.5Hz
Therefore, the frequency of the signal is = 2.5Hz
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I need a detailed explanation on What is nuclear fusion is and what company’s are using it
Answer: here are some of the places that use nuclear fusion
Commonwealth Fusion Systems (CFS)
TAE Technologies.
General Fusion (Canada)
Helion Energy.
Tokamak Energy (U.K.)
First Light (U.K.)
Explanation: nuclear fusion is a nuclear reaction in which atomic nuclei of low atomic number fuse to form a heavier nucleus with the release of energy.
Which of the following statements is UNTRUE? In order for an object to float..
The buoyant force must be stronger than the gravitational force
The density of the object must be less than the surrounding fluid
The object must be equally buoyant with the surrounding fluid
The fluids must be more dense than the object
Answer:
The object must be equally buoyant with the surrounding fluid
is an untrue statement - because the object could not float - it could be anywhere in the fluid
What is the mass of a truck if it produces a force of 14,000 n while accelerating at 5 m/s^2?
Answer:
[tex]F=ma \\ 14000 = 5m \\ m = \frac{14000}{5} \\ \therefore \: m = 2800 \: kg[/tex]
Karyn is a zookeeper who takes care of baboons. Each day, Karyn writes down how the baboons eat, play, sleep, and wash. She reviews her notes every week to see if the animals are healthy and content. Which statement explains why Karyn's approach is an investigation instead of an experiment?
She is measuring variables.
She is testing a specific hypothesis.
She is not following the scientific method.
She is not attempting to change outcomes.
The statement which explains why Karyn's approach is an investigation instead because she is not attempting to change outcomes.
What is Investigation?This is defined as the systematic study of a subject topic and involves various forms of observation.
It however doesn't involve measuring variable as the outcomes aren't changed but only recorded.
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What are two ways an engineer can build a car in order for it to accelerate faster
Explanation:
Take F=ma
a = F/m
For a higher, F higher or m lower
Means higher horse power for engine or lower mass for the car
An engineer can make a car to accelerate faster by having higher horsepower for the engine or less mass for the car.
What is an Acceleration?Acceleration is defined as the rate of change of velocity of an object with respect to time. These are vector quantities because they have both direction and magnitude. The orientation of an object's acceleration is given by the orientation of the net force acting on that object.
Acceleration in a car has everything to do with the torque and horsepower on the car where these two characteristics essentially determine the speed of the vehicle. The higher the torque and horsepower, the faster we go
Acceleration is expressed in terms of Force which is equals to
F=ma (m=mass, a= accelaration)
So, a = F/m
For a higher, F will be higher or m will be lower
Thus, an engineer can make a car to accelerate faster by having higher horsepower for the engine or less mass for the car.
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physics 4
----------------------------
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The value of the peak power will be 50 W. The peak power is found as two times of the average power. Option C is correct.
What is average power?Average power is a ratio of total work done by the body to the total time. Its unit is the watt. It is also defined as the rate of total work done by the body.
The given data in the problem is;
Average power = 25 W
Peak power = ?
The peak power is found as;
Peak power = 2 × average power
Peak power=2×25
Peak power = 50 W
Hence, the value of the peak power will be 50 W.
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What is the missing number in the nuclear reaction shown below? 237 Np 93 - 4 He+ 2 233 ? Pa
actually answer pls
Answer:
91 is the missing number because an alpha particle with a charge of 2 was emitted.
Planet A has a mass of 2.25 x 1020 kg, while planet B has a
mass of 6.20 x 1018 kg. What is the gravitational attraction
between two planets if the distance between them is
435,500 km? Estimate G as 6.67 x 10-11 N (m/kg)
Answer:
4905.95 N
Explanation:
F= G m1 m2 / (r^2)
= 6.67 x 10^-11 * 2.25 * 10^20 * 6.2 * 10^10 / ( 435 500 000)^2 =
( be sure to use meters NOT kilometers !)
The gravitational attraction between two planets is 4905.95 N
What is gravitational attraction?When two objects with masses are placed at a distance, there will an attractive force acting between them.
According to the Newton's law of gravitation, gravitational force is
F = Gm₁m₂ /r²
where r is the distance between the masses m₁ and m₂ and G is the gravitational constant G = 6.67 x 10⁻¹¹ N-m²/kg²
Substitute the values into the expression, we get
F = 6.67 x 10⁻¹¹ x 2.25 x 10²⁰ x 6.20 x 10¹⁸ / (435,500 x 1000)²
F= 4905.95 N
Thus, the gravitational attraction between two planets is 4905.95 N.
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28. use the first equation in section iv for this problem. k = - u_{g} , g=6.67*10^ -11 .m^ 3 kg^-1 s^-2 and m = 3.2 * 10 ^ 23 * kg . find y in terms of r.
When, the mass and gravitational constant is provided, the velocity v in terms of r is 6.534 x 10⁶ r^(-1/2) m/s.
What is gravity?The force of attraction felt by a person which is directed at the center of a planet or Earth is called as the gravity.
The gravitational potential energy is directly proportional to the negative of product of masses of the object and inversely proportional to the distance between them.
U = - GMm/r
From the equation 1, k =-Ug
where k = Kinetic energy = 1/2mv²
here, m is the mass of the object, v is the velocity and g is the grvaitational acceleration.
1/2mv² = -(GMm/r) g
v = sq rt(2GM/r)
Given is the mass M = 3.2 x 10²³ kg , gravitational constant G = 6.67 x 10⁻¹¹ m³/kg.s²
Substitute the values and calculate the velocity v,
v = sq rt [( 2 x6.67 x 10⁻¹¹ x 3.2 x 10²³) / r]
v = 6.534 x 10⁶ r^(-1/2) m/s
Thus, the value of velocity v in terms of r is 6.534 x 10⁶ r^(-1/2) m/s.
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what will be the key difference in the energy of the particles in the iron 250 K and 500 K ?
Answer: the guy is right
Explanation:
:)
An object with a mass of 5.0 kg accelerates 3.0 m/s2 after a force is applied to it. What is the amount
of force acting on the object?
Answer:
Dont
Explanation:
Know
If the andromeda galaxy collided with the milky way, what would most likely happen to earth?.
Answer:
the surface of the earth would've already turned into a very hot liquid water to even exist and there would be no existence of humans on earth
bem ²4.23=1.4m/s
3. Use Equations: What is the mean speed in kilometers per minute (km/min)?
Convert the speed from m/s to km/min using the following formula: mean speed
(m/s) x 1km/1000m x 60s/1min=km/min.
Two conducting spheres have net charges of +3.0 uC and -9.0 uC and attract each
other with a force of 0.20 mN. How far apart are the spheres?
The force between the two charges will be 16,000 N. It is the force exerted by one charge on another charge.
What is electric force?The electric force between the two charges is directly proportional to the product of the charge and inversely proportional to the square of the distance between them.
The given data in the problem is;
The magnitude of charge of sphere q₁ = +3.0 μC=-3.0×10⁻⁶ C
The magnitude of charge of sphere q₂ = -9.0 μC=9.0×10⁻⁶ C
k is the proportionality constant = 9 × 10⁹ Nm²
r is the separated distance to be found;
The electric force is F = 0.20 mN = 0.20 ×10⁻³ N
The electric force is found as;
[tex]\rm F = \frac{K q_1q_2}{r^2} \\\\ \rm 0.20 \times 10^{-3} = \frac{9 \times 10^9 \times 3.0 \times 10^{-6}\times 3.0 \times 10^{-6} }{r^2} \\\\\ R^ 2 =4.04\times 10^{-4} \\\\ R= 0.020 \ m[/tex]
Hence, the force between the two charges will be 16,000 N.
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The magnitude of the average braking force on the car is most nearly
Braking force is applied to brakes to stop the car. The average braking force is 2kN.
What is force?Force is the product of mass of the object and acceleration.
The braking force is the force applied on the brakes to stop the car at a distance.
Suppose, the mass of the car is m=1000kg
The initial velocity of the car is u=10m/s
The time is t=5s
The final velocity of the car is v = 0 m/s
Applying the first equation of motion, to calculate the acceleration,
v=u + at
a=(v−u) / t
a =0−10 / 5
a =−2m/s²
Then, apply Newton's Second Law of Motion to calculate the braking force
F = ma = 1000 x 2= 2000 N or 2kN
Thus, the magnitude of the average braking force on the car is most nearly 2kN.
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physics 1
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The emf is induced in the wire will be 1.56 ×10 ⁻³ V. The induced emf is the product of the magnetic field,velocity and length of the wire.
What is induced emf?Emf is the production of a potential difference in a coil as a result of changes in the magnetic flux passing through it.
When the flux coupling with a conductor or coil changes, electromotive Force, or EMF, is said to be induced.
The given data in the problem is;
B is the magnitude of the magnetic field,= 5.0 ×10⁻⁵ T
V(velocity)=125 M/SEC
L(length)=25 cm=0.25 m
The maximum emf is found as;
E=VBLsin90°
E=125 × 5.0 × 10⁻⁵ ×0.25
E=1.56 ×10 ⁻³ V
Hence, the emf is induced in the wire will be 1.56 ×10 ⁻³ V
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