Answer:
C
Explanation:
V=12v
I=0.8A
P=VI
=(12)(0.8)
=9.6W
Answer:
9.6
Explanation:
A spherical mirror and a thin spherical lens have each a focal length of +10cm , the mirror and the lens are likely to be
Answer: Concave mirror and convex lens
Explanation: A spherical mirror and a thin spherical lens have each a focal length of +10cm, this means that distance of any object from the mirror is +10 metres.
While for the lens, the distance of any object to the other side of the lens is +10 metres. Therefore, the mirror is concave mirror and the lens is a convex lens.
When a shot putter exerts a force of 140 N on a 7.5 kg shot, what its is acceleration?
18.67
Explanation:
acceleration=Force÷mass
acceleration=140÷7.5
acceleration=18.67
Answer:
Explanation:
Force,F = mass,m × acceleration due to gravity,g
⇒g=F/m
⇒g=140/7.5
⇒g=18.67 N/kg
Calculate the wavelength of an electron mass 9.1*10^-31kg moving with a velocity of 2.0*10^6m/s (h=6.63*10^-34Js) (Hint: De Broglie's wavelength)
Answer:
Wavelength, [tex]\lambda=3.64\times 10^{-10}\ m[/tex]
Explanation:
We have,
Velocity an electron is [tex]2\times 10^6\ m/s[/tex]
Mass of an electron is [tex]9.1\times 10^{-31}\ kg[/tex]
It is required to find the wavelength of electron. The De-Broglie wavelength of an electron is given by :
[tex]\lambda=\dfrac{h}{mv}[/tex]
h is Planck's constant
[tex]\lambda=\dfrac{6.63\times 10^{-34}}{9.1\times 10^{-31}\times 2\times 10^6}\\\\\lambda=3.64\times 10^{-10}\ m[/tex]
So, the wavelength of an electron is [tex]3.64\times 10^{-10}\ m[/tex].
The mass of Mars is 6.42 × 1023 kg. Its moon Phobos is 9378 kilometers away from Mars and has a mass of 1.06 × 1016 kg. What is the gravitational force between Mars and Phobos? 5.16 × 1015 N 5.16 × 1021 N 4.84 × 1022 N 4.84 × 1025 N
Answer:
A on Edge 5.16 x 10^15 N
Explanation:
The gravitational force between Mars and Phobos is 5.16*10^15 N.
Using the formula
F = G m1 m2/ r^2
= 6.67*10^-11*6.42*10^23*1.06*10^16/(9378)^2
= 45.39*10^28/87946884
= 5.16 * 10^15 N
What is gravitational force ?"The force of attraction on a body by earth is called gravitational force." Example : The leaves and fruits fall from a tree downwards towards the ground, water in a river flows down streams, a ball thrown up goes to a height and then returns back on ground are some examples of motion due to gravitational force.
What is phobos ?"Phobos is the larger of Mars' two moons and is 17 x 14 x 11 miles (27 by 22 by 18 kilometers) in diameter. It orbits Mars three times a day, and is so close to the planet's surface that in some locations on Mars it cannot always be seen."
Know more about gravitational force here
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When waves travel through water, why do the moving water particles continue to return to their starting position?
OA.
Waves transfer matter, but not energy.
Waves transfer both matter and energy.
OC.
Waves transfer energy, but not matter.
OD.
Waves don't transfer matter or energy.
Answer:
Waves transfer energy, not matter
Explanation:
If it’s a full moon how much of the moon are you actually seeing ?
Answer:
half of the moon
Explanation:
cause your seeing the front of it
Answer:
The light side of the moon so only half
Explanation:
Charge q is 1 unit of distance away from the source charge S. Charge p is two times further away. The force exerted
between S and q ls the force exerted between S and p.
Answer:
The correct answer will be "1/16".
Explanation:
The force or distance between two substances in charge seems to be inversely proportional to the square of the size of the particles.
The exerted force between "S" and "q" will be:
⇒ [tex]Fsq=\frac{{Q}'}{Q} 1^2[/tex] ...(equation 1)
The exerted force between "S" and "p" will be:
⇒ [tex]Fsp=\frac{{Q}'}{Q} 4^2[/tex] ...(equation 2)
Now,
On the comparison of "equation 1" and "equation 2", we get
⇒ [tex]\frac{1}{16}[/tex]
Someone please help me with this
1. A guitar string vibrates with a frequency of 100 Hz and it has a wavelength of 3 cm. Determine the speed of the wave that goes through that guitar string.
2. The speed of sound waves in air is around 340 m/s. Suppose that you hear a dog growl, and the frequency of the growl is 70 Hz. Determine the wavelength of the growl sound waves.
3. You are in a boat on the ocean. Some waves come by and you feel your boat move up and down. You whip out a stopwatch and find that you go up-and-down once every 5 seconds. So, the period of the wave is 5 s. You are watching the waves as you go up-and-down, and you see that the wave crests are 15 meters apart. So, the wavelength is 15 m. Use this information to calculate the speed of the waves.
4. Explain why these two waves have the same speed, even though some of their wave properties are different.
Wave A has a frequency of 3 Hz and a wavelength of 5 m
Wave B has a frequency of 6 Hz and a wavelength of 2.5 m
Answer: I think 1 is 300 metres per second.
Explanation: wave speed= wave length x wave frequency
wave speed = 3 x 100
wave speed is 300 m/s
When transferring electric charge, an object becomes negative when it
a) loses protons
b) gains electrons
OC) loses electrons
d) gains protons
e)
a and d are correct
Answer:
b) gains electrons
Explanation:
When transferring electric charge, an object becomes negative when it gains electrons
What is the average velocity of atoms in 1.00 mol of neon (a monatomic gas) at 465 K? For m, use 0.0202 kg.
Answer: 757m/s
Explanation:
Given the following :
Mole of neon gas = 1.00 mol
Temperature = 465k
Mass = 0.0202kg
Using the ideal gas equation. For calculating the average kinetic energy molecule :
0.5(mv^2) = 3/2 nRt
Where ;
M = mass, V = volume. R = gas constant(8.31 jK-1 mol-1, t = temperature in Kelvin, n = number of moles
Plugging our values
0.5(0.0202 × v^2) = 3/2 (1 × 8.31 × 465)
0.0101 v^2 = 5796.225
v^2 = 5796.225 / 0.0101
v^2 = 573883.66
v = √573883.66
v = 757.55109m/s
v = 757m/s
If a (hypothetical) atom with 30 protons and 44 neutrons undergoes alpha decay:
how many protons will be left in the nucleus?
how many neutrons will be left in the nucleus?
Answer:
Protons = 28
Neutrons = 42
Explanation:
Alpha decay is one of radioactive decay in which the atomic nuclei can be illustrated by the emission or loss of helium particles of mass number 4 and proton number of 2
Because mass number is the sum of protons and neutrons, If a (hypothetical) atom with 30 protons and 44 neutrons undergoes alpha decay, 28 protons will be left in the nucleus and 42 neutrons will be left in the nucleus.
Match the type of metamorphism to its best definition.
Impact
metamorphism
?
The process in which a
rock changes as a result
of heat generated from
magma.
Dynamic
metamorphism
?
The process in which a
rock changes due to
pressure directed on it.
Contact
metamorphism
?
The process in which a
rock changes because of
extreme heat and pressure
caused by a meteorite
collision with Earth.
Regional
metamorphism
?
The process in which
buried rocks in a large
area are changed by heat,
pressure, and fluids.
Answer:
See Explanation.
Explanation:
Impact metamorphism:
The process in which a rock changes because of extreme heat and pressure caused by a meteorite collision with Earth.
Regional metamorphism:
The process in which buried rocks in a large area are changed by heat, pressure, and fluids.
Contact metamorphism:
The process in which a rock changes as a result
of heat generated from magma.
Dynamic metamorphism :
The process in which a rock changes due to
pressure directed on it.
The typing of metamorphism to its best definition should be explained below.
Matching with the best definition:
Impact metamorphism: The process where a rock changes due to extreme heat and pressure caused by a meteorite collision with Earth.
Regional metamorphism: The process where it should be buried rocks in a large area that should be changed by heat, pressure, and fluids.
Contact metamorphism: The process where a rock changes as a result
of heat generated from magma.
Dynamic metamorphism : The process where a rock changes due to
pressure directed on it.
Learn more about pressure here: https://brainly.com/question/20772787
Which of the following is an example of a chemical change
It takes 50 N to move a desk 0.4 m high. What is the work done? W=F*d *
a) 20 J
b) 125 J
c) 0.008 J
d) 100J
brainliest for the best answer, asap plz
for science lovers
Answer:
A) 20J
Explanation:
Work = Force x Distance
Force = 50N
Distance = 0.4M
Work = 50 x 0.4 = 20J
If the frequency of a wave is
1000 waves per second, how long does it
take for one wave to pass a certain point?
Answer: the answer is D its in the book If u have it
Explanation:
which property of substances help to make a thermometer?
I NEED HELP.
Answer:
Mercury
Explanation:
Mercury streches when it is hot so that is why it goes up when the temperature is higher
M
An object has a mass of 5.52 g and a volume of 12 mL. What is the density of the object
Answer:
0.46 g/mL
Explanation:
Density can be found using the following formula.
[tex]d=\frac{m}{v}[/tex]
where d is density, m is mass, and v is volume.
We know that the object has a mass of 5.52 grams and a volume of 12 milliliters.
m=5.52 g
v=12 mL
Substitute these values into the formula.
[tex]d=\frac{5.52 g}{12 mL}[/tex]
Divide 5.52 by 12
5.52/12=0.46
d=0.46 g/mL
The density of the object is 0.46 g/mL, and option C is correct.
Buoyancy is a force that always acts in a _____ direction, exerted by a fluid on a body placed in the fluid.
Answer:
Upwards direction
Explanation:
The buoyancy force is caused by the pressure exerted by the fluid in which an object is immersed. The buoyancy force always points upwards because the pressure of a fluid increases with depth.
Answer:
Upwards direction
Explanation:
a car travels 60 km in 2 hours 84 km the next 1 hour and then 68 km in 8.9 hours before reaching its destination what was the cars average speed in km / h
Answer:
17.8 km/hr
Explanation:
Average speed = distance / time
The total distance traveled is 60 km + 84 km + 68 km = 212 km.
The total time is 2 hr + 1 hr + 8.9 hr = 11.9 hr.
The average speed is 212 km / 11.9 hr = 17.8 km/hr
explain why the statement “Dropped objects fall toward the ground" is a law and not a theory
The statement is a law because it accurately describes EVERY observation. No contradiction has ever been observed that would disprove it, or even cast doubt on it.
(Wellll ... at least, no contradiction that wasn't immediately and easily explainable, like dropping a helium balloon, or a sheet of paper in a high wind.)
The statement is legal because it accurately describes all that is seen. No controversy has ever arisen to disprove it or cause it to doubt.
What is gravity?The force of gravity is the force that the planet or another body of gravity absorbs. Gravity holds all the planets in orbit around the sun.
What causes gravity?The greater the size of the two objects and the shorter the distance between them, the stronger the gravitational force. We also know that gravity can work in a complex system with several components.
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What is true about an electric field around a positive charge?
A The electric field points inward.
B The electric field points in both directions.
C The electric field points outward.
Answer:
C
Explanation:
the electric field point radically away from the charge
how has E=MC2 helped us with our understanding of how stars like our Sun create energy?
Answer: please find the answer in the explanation
Explanation:
E = MC^2
Where
E = energy
M = mass
C = speed of light.
This equation is an eyes opener about the relationship between matter and energy. Its explanation about how matter can become energy and how energy can also give information about matter.
It helps us to understand the fusion and fission of both sun and star particles which eventually give us the result of the magnitude of energy they emit or radiate.
3.If a force of 12 N is applied to an object with a mass of 2 kg, what will be its acceleration?
Answer:
6 m/s^{2}
Explanation:
The formula for force is
F = mass x acceleration
F = 12 N
mass = 2 kg
So, you can change the formula to solve for acceleration.
acceleration = F / mass
a = 12 N / 12 kg
a = 6 m/s^{2}
A large force will cause_______ acceleration than a small force
Answer:
A large force will produce more acceleration than a small force acting on the same object.
HIME REMAIN
58:15
If business owners want to increase demand for their goods and services, what is the best action for them to take?
increase their models
increase their projections
decrease their prices
decrease their quantities
Answer:
decrease their prices
Explanation:
If we see demand curve then we can observe that demand for good decreases when price increases and demand for good increases when price decreases.
We also know intuitively that customer are price sensitive. That is their buying behavior changes with price of goods, Consumers prefer lower priced good.
So, if business owners want to increase demand for their goods and services
they should decrease their prices.
I'M ON A TIMER Ingrid says that a red ball of clay appears red because the clay reflects red wavelengths. Simon says that the clay appears red because it allows red wavelengths to pass through it. Which statement best explains who is correct? Ingrid is correct. The clay appears red because it is opaque. Ingrid is correct. The clay appears red because it is a type of matter. Simon is correct. The clay appears red because it is opaque. Simon is correct. The clay appears red because it is a type of matter.
Answer:
Ingrid is correct. The clay appears red because it is a type of matter.
Explanation:
Explanation: It is A because it only shows red because it only reflects red. If it let any other color pass through it then it could reflect any color.
All engines operate at less than 100 percent efficiency because they
A. absorb heat
B. conduct heat
C. burn gasoline
D. emit heat
Answer:
It is B or D, but I may be leaning a little more towards D.
Explanation:
Write down the equation that links energy transferred, charge flow, and
potential difference.
Answer:
The description of the given scenario is described in the explanation segment below.
Explanation:
As a charge passes through some kind of potential gap, the electrical task is undertaken as well as energy will be transferred. The Potential difference seems to be an amount of work performed per unit charge and is denoted by "V" as well as a charge is denoted by "Q".The energy transferred could be determined by using the following equation or formula:
⇒ Energy transferred = charge × potential difference
The equation that links energy transferred, charge flow, and potential difference (voltage) is: [tex]E = qV[/tex]
In Science, when a potential difference (voltage) is applied on an object, it gains some potential energy, which is then converted to kinetic energy.
The kinetic energy possessed by the object is responsible for the movement of electrons from one point to another in an electric field.
Hence, the quantity of energy in an electric circuit is directly proportional to the charge and potential difference (voltage) applied on the object.
Mathematically, the energy transferred in an electric field is given by the formula:
[tex]E = qV[/tex]
Where:
E is the energy transferred.q is the charge.V is the potential difference.Read more: https://brainly.com/question/23153766
Two students walk out on the broken bridge together. As they reach the end of the bridge, what would happen to their gravitational potential energy.
A)Decrease
B)increase
C)Remain the same
D)None of the above
Answer: C
Explanation: I dont realy know what this means. but it will not increase because your not getting closer to earths center of gravity and not decreasing because your not high enough in the atmosphere.
A plane increases its speed from 450 km/hr to 750 km/hr in 0.30 hour. What is its acceleration?
Answer:
The acceleration is found as:
a = 1000 km/h²
Explanation:
Initial speed of the plane = 450 km/h
Final speed of the plane = 750 km/h
Time taken = 0.3 h
Acceleration can be defined as the change of speed of the object divided by the time taken to bring that change
Acceleration is given as:
[tex]a=\frac{v_f-v_i}{t}[/tex]
where v(f) = 750 km/h , v(i) = 450 km/h , t = 0.3 h
Substitute the values in the equation of acceleration
[tex]a= \frac{750-450}{0.3}\\a=\frac{300}{0.3}\\a=1000 km/h^2[/tex]
This is the found result
