Answer:
D is the answer
Explanation:
6.45×7.44= 47.98800
Which if we round of we get 48m
the length of air column at which the first resonance was observed when a vibrating fork was placed on a resonance tube was 30cm. Calculate the wavelength of air column and frequency of the fork speed of sound 330m/s
[tex]\boxed{\sf Wavelength=\lambda=4\ell}[/tex]
[tex]\\ \sf\longmapsto \lambda=4(0.3)[/tex]
[tex]\\ \sf\longmapsto \lambda=1.2m[/tex]
Now
[tex]\boxed{\sf Frequency=\nu =\dfrac{v}{\lambda}}[/tex]
[tex]\\ \sf\longmapsto \nu=\dfrac{330m/s}{1.2m}[/tex]
[tex]\\ \sf\longmapsto \nu=275s^{-1}[/tex]
Answer:
Velocity=330m/s=v
Length=l=30cm=0.3m
Wavelength=λ=4ℓ
⟼λ=4(0.3)
⟼λ=1.2m
Now
Frequency= ν= λ/v
⟼ν= 1.2m/330m/s
⟼ν=275s^-1
hope it's help you...!!!!
#rishu
Why is running or jogging good aerobic excercise? Explain
Answer:
Running is faster, uses more kilojoules and demands more effort from the heart, lungs and muscles than jogging. Running requires a higher level of overall fitness than jogging. Both running and jogging are forms of aerobic exercise.
Explanation:
What do you know about nuclear energy?
Answer:
Nuclear energy comes from splitting atoms in a reactor to heat water into steam, turn a turbine and generate electricity. Ninety-three nuclear reactors in 28 states generate nearly 20 percent of the nation's electricity, all without carbon emissions because reactors use uranium, not fossil fuels.
please follow meIf Bert the Bat travels eastward at 40 mph with a tailwind of 6 mph, what is his actual speed?
Answer:
36 mph.
Explanation:
Now Albert here is using the wind to his advantage but if say there was no wind then he would not have the 6 mph behind him so we subtract 6 from 40 to get 36. hope this helps :)
Venus
Mars
It has no atmosphere due
to weak gravity.
Europa
It is too hot for liquid
water to exist.
--
Earth's moon
1
1
1
It is too cold for liquid
water to exist on the
surface.
?
Scientists believe it used
to have flowing liquid
water.
SUBMIT
Answer:
Earth is the only known planet to have bodies of liquid water on its surface. Europa is thought to have subsurface liquid water. ... Evidence points to water on other planets in our solar system. In 2015, NASA confirmed that liquid water flows intermittently on present-day Mars
Mark me a brainlist
It is better to use crow bar to displace a heavy load than with hands . Give reason .
Explanation:
Cause it multiples force which makes it easier to move.
6. 498.82 mg comverted to kg
Answer:
0.00049882 kg
........................
Answer:
498.82 mg=0.00049882 kg
Explanation:
To get this answer, you must multiply the quantity of mg by 0.000001, which is also 0.001². Since one gram is 1000 mg, and 1000 g is 1 kg, you must divide the amount of mg by one million, or multiply by 1/1000000, or 0.000001. I hope this helped you. Enjoy your day, and take care!
A baseball diamond is a square (don’t be fooled that it is usually shown rotated by 45°). Each side of the square is 90 feet long (to two significant figures). How far must a fielder throw the ball from second base to home plate?
A line from second to home creates a right triangle with 45 degree angles.
This makes the diagonal line the side length of the square multiplied by the sqrt(2)
Second to home = 90sqrt(2) = 127.279 feet ( round answer as needed)
True or false: Pluto is a dwarf planet
Answer:
Pluto is a dwarf planet. Turr
if u can solve these with work i will literally love u forever
Answer:
I cant open it neither I can download it!
What is the magnitude of a vector if the x component is -12 m and the y component is 21m?
Answer:
22.02
Explanation:
(-21)²+(12)²=r²
r=√585
r=22.02
39 liters of water at
20 °C are mixed with
21 liters of water at
60 °C. What is the
temperature of the
mixture?
Answer:
Temperature of the mixture=8 °C
Explanation:
Let, Temperature of the mixture=t °C
Q₁ = Q₂
=> m₁SΔΘ₁ = m₂SΔΘ₂
=> 39 × (20+t) = 21 × (60-t)
∴ t = 8 °C
hope you have understood this
pls mark it as the brainliest
An 80-kg person running at 4 m/s will have a momentum of _______ kg-m/s.
Answer:
320 Ns
Explanation:
As P=mv
So,
80(4)=320
Plsss helppp me I have a lot of questions pls help me I will mark brainliest!!!
Answer:
kilo means 1000
2a. 0.1
b. 100
c.0.01
d. 0.001
3a.km
b.mL
d.cg
e.mm
g. g
h.kL
Why water in a container is curved but not flat
how is light reflected from a prism
Answer:
White light entering a prism is bent, or refracted, and the light separates into its constituent wavelengths. Each wavelength of light has a different colour and bends at a different angle. The colours of white light always emerge through a prism in the same order—red, orange, yellow, green, blue, indigo, and violet.
in the Newton's Third Law of Motion state three characteristics
Answer:
Newton's third law: If an object A exerts a force on object B, then object B must exert a force of equal magnitude and opposite direction back on object A. This law represents a certain symmetry in nature: forces always occur in pairs, and one body cannot exert a force on another without experiencing a force itself.
The P.E stored by a mass spring system at an extension of 2 cm is 10 J. The P.E stored by the same system at an
extension of 4 cm will be:
Explanation:
extension(x) = 0.02m When the P.E is 10J.
extension(x)= 0.04m PE?.
P.E is proportional to Extension²
P.E/x² = P.E"/x"²
10/(0.02)² = P.E/(0.04)²
P.E= 10x(0.04)²/(0.02)²
P.E= 40J
calculate the potential difference between points x and y
Answer:
4.275v
Thank you
Answer:
-4.27
Explanation:
hope this may help you TQ.
Defects of vision and their correction drawing
No Spams ❌❌
Answer:
Vision Correction
You probably know people who need eyeglasses or contact lenses to see clearly. Maybe you need them yourself. Lenses are used to correct vision problems. Two of the most common vision problems are myopia and hyperopia.
Explanation:
hope this helps
Weight is equal to:
A. mg^2
B. m/g
C. mg
D. m^2g
Two trucks left the warehouse at the same time and drove in
the same direction along a straight road. One truck drove at 68
km/h while the other drove at 57 km/h. Find theirs distance
apart after2 hours.
A boy rode a bike and covered 90 km at an average speed equals 36 km/h but he covered the first thirty km in two hours. What is the average speed at which the remaining distance was covered ?
Answer:
40
Explanation:
because his increasing speed
Metric conversions
SHOW WORK!!!
1.) 15m —> dm
2.) .023 cc —> L
3.) .00049 km —>
4.) 0.25 kg —> g
5.) 15g —> hg
[tex]\\ \sf\longmapsto 15m[/tex]
[tex]\\ \sf\longmapsto 15(10)[/tex]
[tex]\\ \sf\longmapsto 150dm[/tex]
2:-1L=1000cm^3[tex]\\ \sf\longmapsto 0.023cm^3[/tex]
[tex]\\ \sf\longmapsto 0.023\times 0.001[/tex]
[tex]\\ \sf\longmapsto 0.00023L[/tex]
3:-1km=1000m[tex]\\ \sf\longmapsto 0.00049km[/tex]
[tex]\\ \sf\longmapsto 0.00049(1000)[/tex]
[tex]\\ \sf\longmapsto 0.49m[/tex]
4:-
1kg=1000g[tex]\\ \sf\longmapsto 0.25kg[/tex]
[tex]\\ \sf\longmapsto 0.25(1000)[/tex]
[tex]\\ \sf\longmapsto 250g[/tex]
5:-
1g=0.0001hg[tex]\\ \sf\longmapsto 15g[/tex]
[tex]\\ \sf\longmapsto 15(0.0001)[/tex]
[tex]\\ \sf\longmapsto 0.0015hg[/tex]
what is gravitational ? what are the factors that affect gravition ? witre the SI unit of gravition
The gravitational force is a force that attracts any two objects with mass. Two major factors, mass and distance, affect the strength of gravitational force on an object.Newtons kg-2 m2 is it's SI unit.
1 point
30. A ray passing through the centre of curvature of a concave mirror.
after reflection is reflected back along the same path. Which is the correct
figure for the above statement.
Explanation:
when the object is between the pole and focus
In a parachute, falling steadily at 7.5m/s, how long does it take to reach the ground from 3,000 m high?
Answer:
25 minutes
Explanation:
8. Define resistance and resistivity and also give the relation between them. Explain the
dependence of resistance on temperature.
I huhs burn for
Answer
I hope it's helps you
Calculate the number of moles in i) 27g of Al ii) 1.51 x 102 molecules of NHAC Give the salient features of "Modern atomic theory" Derive the relationship between Relative molecular mass and Vapour density.
How many cm are in 900 feet? Using the method of dimensional analysis