Answer:
450m because you multiply the force to the distance to get how much work you've done.
A ray of light in air strikes the surface of a liquid at an angle of 65 degrees with the normal. The refracted ray is at an angle of 42 degrees with the normal. What is the index of refraction of this liquid?
The index of refraction of this liquid will be 1.28. It is found as the ratio of the sin of the angle of incidence and the angle of reflection.
What is an index of refraction?The refractive index of a substance is a dimensionless quantity that specifies how quickly light passes through it in optics.
The given data in the problem is;
Angle of incidence (i)= 65°
Angle of refraction(r) = 42°
The formula for the index of refraction is;
[tex]\rm n = \frac{sin \ i }{sin \ r} \\\\ \rm n = \frac{sin 65 ^0}{sin 42^0} \\\\ n=1.28[/tex]
Hence, the index of refraction of this liquid will be 1.28.
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The group of membranes that extend out from the nucleus throughout the cytoplasm allowing for structural support and efficient movement of materials within the cell is the
In astronomy, distances are often expressed in light-years. One light-year is the distance traveled by light in one year. If the distance to a star is 3.5 light-years, what is this distance in meters
Answer:
dd=4.3 ly=4.3 •9.46•10°15 m=4.1 10°16m.
Explanation:
Which is produced around a wire when an electrical current is in the wire?
A.magnetic field
B.solenoid
C.electron flow
D.electromagnet
Answer:
it is a magnetic field
Explanation:
what is the mass of an object if a force of 2N and gives it an acceleration of 2 m/s2
Answer:
1kg
Explanation:
Use the formula
F=ma
m=F/a
m=2N/2m/s^2
m=1kg
Which of the following
is FALSE about forces?
A. Forces can cause change.
B. Forces act in pairs.
C. Forces cannot be quantified.
A 38kg child is at the top of a slide that is 2. 1m tall.
(a) If there is no friction, how fast will they be moving when they reach the bottom of the slide?
(b) If they lose 250. 0J of energy to sound, heat, and friction, how fast will they be moving when they reach the bottom?
Answer:
please do not trust those scam links
I need help on this question!! Please answer asap!
Answer:
hub moon merc saturn sun galaxy deep field
Explanation:
A box with a mass of 50 kg is raised straight up. What is the force of the box?
Answer:
A box with a mass of 50 kg is raised straight up. What is the force of the box? plss help!! two types exist-positive and negative. possible answers: A- electric current B- repel C- lines of force D- charges. Five wavelengths are generated every 0.100 s in a tank of water.
Explanation:
I hope it helped
Sam runs a 100 m race in 16 seconds. Calculate how fast he was running in m/s.
Answer:
6.25 m/s
Explanation:
100÷16=6.25
An ideal gas, initially at a volume of 2.33333 L
and pressure of 9 kPa, undergoes isothermal
expansion until its volume is 7 L and its pressure is 3 kPa.
Calculate the work done by the gas during
this process.
Answer in units of J.
(part 2 of 2)
Find the heat added to the gas during this
process.
Answer in units of J.
The work done by a gas during an isothermal process is equal to -23.079 Joules.
How to calculate the work done by the gas.Mathematically, the work done by a gas during an isothermal process is given by this formula:
W = nRTln(P₂/P₁)
Where:
P is the pressure.R is the ideal gas constant.T is the temperature.n is the number of moles.Given the following data:
Initial volume = 2.33333 L to m³ = 0.00233333 m³.
Initial pressure = 9 kPa.
Final volume = 7 L to m³ = 7000 m³.
Final pressure = 3 kPa.
Next, we would determine the temperature of this gas by using the ideal gas equation:
T = PV/R
T = (9000 × 0.00233333)/8.314
T = 2.526 K.
Now, we can calculate the work done by this gas:
W = nRTln(P₂/P₁)
W = 1 × 8.314 × 2.526 ln(3000/9000)
W= 21 × ln(0.3333)
W = 21 × (-1.099)
W = -23.079 Joules.
How to calculate the amount of heat added.From the first law of thermdynamics, the amount of heat added to the gas during this isothermal process is given by:
Q = -W
Q = -(-23.079)
Q = 23.079 Joules.
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Pls answer need help
Answer:
See below
Explanation:
Find the NET forces on the objects
A 20==>
B 0
C 30==>
D 15==>
So biggest accel = C because it has the most force acting on it
next is A because it has the next biggest force
next is D then B ...B has no net force acting on it
A horizontal uniform 1.20-N meter stick is held up by two vertical strings, one at the 20-cm mark and the other at the 60-cm mark. What is the tension in the string at the 60-cm mark
The tension in the string at the 60-cm mark will be 0.9 N.The tension force is applied along the whole length of the wire, pulling energy equally on both ends.
What is tension force?The tension force is described as the force transferred through a rope, string, or wire as it is pulled by opposing forces.
The given data in the problem is;
The length of the stick is, L= 1.20 m =120 cm
T is the tension in the string at the 60-cm mark;
T₁ is the tension at the 20-cm mark
From the torque equilibrium law;
[tex]\rm mg(30)-T_2(40)+T_2 (40) =0 \\\\\ T_1(0)=mg (30)\\\\\ T_2(40)=1.2 (30) \\\\ T_2= 0.9 \ N[/tex]
Hence the tension in the string at the 60-cm mark will be 0.9 N.
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At very high pressures, gases become what and will eventually do what
Someone claims, based on temperature measurements, that the temperature of a fluid rises during a throttling process in a well-insulated valve with negligible friction. Does this process violate any thermodynamic laws
For someone who claims that based on temperature measurements, the temperature of fluid rises during a throttling process, this assertion is true since no thermodynamic rules are broken.
What is thermodynamics?Generally, Thermodynamics is simply defined as a field of science that is responsible for the relationship between heat and other types of energy.
In conclusion, The temperature of the fluid fluctuates or stays the same during the throttling process.
As a result, this assertion is true since no thermodynamic rules are broken.
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What is sliding friction?
A. When two solid surfaces slide past one another.
B. When air, water, or oil flow next to a solid.
C. When an object rols across a surface.
D. When objects move through water.
Answer:
I think the answer would be B
Explanation:
Hope this helps:)...if it's wrong I'm sorry for wasting your time and may God bless you:)
A sphere of metal has a mass of 1431 g and a diameter of 5.80 cm. What is the density of metal in g/cm3
Answer:
see below
Explanation:
You will need t find the volume of the sphere
4/3 pi r^3 divide into the mass
1431 / (4/3 pi (5.8)^3) = 14 gm /cm^3
It takes 2.5 minutes for sunlight to reach Mercury. How far is Mercury form the Sun, in meters?
A. 7,200,000,000
B. 110,000,000,000
C. 144,000,000,000
D. 45,000.000.000
E. 3.000,000,000
F. 13,000,000
G. 120.000.000
H. 250,000.000.000
Answer:
Its 57.723 billion meters but D is the closest to that.
4. Surface waves in an earthquake cause damage and destruction by shaking the ground up and down. They are an example of which type of waves:
a. Electromagnetic waves
b. Transverse waves
c. Standing waves
d. Compression waves
Standing waves is the perfect answer for this
A light bulb has a resistance of 360. What is the current in the bulb when it has a potential difference of 120 v across it?.
Answer:
1/3 amp
Explanation:
V = IR
V/R = I
120 / 360 = 1/3 amp
What does it mean when di is negative?
Answer:When the image distance is positive, the image is on the same side of the mirror as the object, and it is real and inverted. When the image distance is negative, the image is behind the mirror, so the image is virtual and upright.
Explanation:
For a 100-Amp, 120/240-V, 3W commercial service, ___ AWG copper THHN/THWN conductors are the smallest permitted for the ungrounded conductors.
For a 100-Amp, 120/240-V, 3W commercial service, 3 AWG copper conductors are the smallest permitted for the ungrounded conductors.
What is AWG copper THHN/THWN conductors?AWG stands for American Wire Gauge (AWG).
This is a measurement of the thickness of conductive wires. It is usually applied for the copper conductors in shielded and unshielded twisted-pair cable.
Thus, for a 100-Amp, 120/240-V, 3W commercial service, three (3) AWG copper THHN/THWN conductors are the smallest permitted for the ungrounded conductors.
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A certain source with a half-life of 1 min gives
2800 counts/s at time t=0.
What is the counting rate after 3min
Why can't our current theories describe the conditions that existed in the universe during the Planck era
Current theories can't describe the conditions that existed in the universe during the Planck era because of energy fluctuation.
Who was Planck?He is referred to as the father of quantum mechanics and postulated that the energy of light is proportional to the frequency with the constant being referred to as planck's constant.
Current theories can't describe the conditions that existed in the universe during the Planck era because of energy fluctuation which led to the gravitational field to randomly warp space and time.
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What is the relative motion if there were two marbles traveling next to each other at different speeds?
Answer:
v1-v2 is motion of m2 relative to m1 v2-v1 is motion of m1 relative to m2
Explanation:
Your favorite radio station broadcasts at a frequency of 83.8 MHz with a power of 16.5 kW. How many photons does the antenna of the station emit in each second
For a radio station broadcasts at a frequency of 83.8 MHz with a power of 16.5 kW, the number of photons is mathematically given as
P=6.92*10^{29}photon/sec
What is the number of photons does the antenna of the station emit in each second?Generally, the equation for the energy is mathematically given as
E=hf
Therefore
E=6.63*10^{34}*83*10^6
E=5.561*10^26J
In conclusion, the number of photons
P=dN/dt
P=38500/5.561*10^{26}
P=6.92*10^{29}photon/sec
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It takes at least 4 people to push a refrigerator up a 10-meter ramp. How many people would be needed to push the same refrigerator to the same height using a 20-meter ramp? (Assume no friction for both ramps. )
The rate of flow of electric charge along a wire is called.
Current
Hope this helps!
which statement below can be made about the production of electricity in a nuclear reactor
Answer:
Heat flows from the reactor to the water
Explanation:
Good luck! :)
Why can’t you
feel the effect of the reaction
force when an object falls to
Earth?
Answer:
Because the Earth is EXTREMELY massive
Explanation: