A burst of sound takes 0.4 seconds to reach the seabed and return, if speed of sound in water is 1400m/s. what is the depth of water?
Explanation:
Given:
Speed of sound = 1400 m/s
Total time taken = 0.4 seconds
To find:
The depth of water
Solution:
As it take 0.4 seconds for the burst to reach the seabed and return (both ways), we can deduce that it takes 0.2 seconds to reach the seabed (one way).
This is because the speed of sound is a constant.
Now, to find the depth, we use the equation
Speed = Distance/Time
Here, we know the values of speed (1400 m/s) and time (0.2 seconds). Distance is the depth of the water, which we need to find. Let the distance be x.
Therefore
1400 = x/0.2
x = 1400 * 0.2
x = 280 m
We get the depth as 280 metres.
Feel free to ask me if you didn't understand any part.
Hope this helps! :D
To fight a bacterial infection, a patient was given an antibiotic to take for 10 days. After the patient finished taking the antibiotics as directed, almost all the bacteria were killed. After another 10 days, the patient was sick again with the same type of infection.
What most likely happened?
A A few bacteria survived the antibiotics and stopped reproducing.
B The patient’s high fever inactivated the antibiotic, allowing the surviving bacteria to grow rapidly.
C The antibiotic slowed the life cycle of the bacteria.
D Some of the bacteria were resistant to the antibiotic, and they
reproduced.
HELP!!
Answer:
its D
Explanation:
didnt see what u said lol they deleted it again :(
To open a soda can lid, you can apply a force of 50 N to a car key wedged under
the lid. The car key applies a force of 390 N to the lid. What is the mechanical
advantage of using the car key to open the can lid?
Answer:
7.8
Explanation:
Here, an effort of 50 N is applied at the car key and overcomes the resistance(or load) of 390 N at the lid.
mechanical advantage
=load/effort
=390 N/50 N
=7.8
Ultraviolet rays are more likely to give you a sunburn than visible light. What statement would be the best possible explanation for this?
Answer : Visible light cannot penetrate the skin. Ultraviolet rays have a higher frequency and therefore have more energy.
Explanation:
HELP MY GRADES-
question: If you see a lightning flash, and you hear the thunderclap one second later, how far away is that lightning?
SCRABBLE LETTERS: For a word from the given letters related to TEAM SPORT
1. ATKELBSLLA-
6. VERATGLNIL -
2. LSFLOTBA-
7. LAVLOLEBYL -
A ICRO -
8. LOFU-
4. EFERERE-
9. GINNIN -
5. PERIMU -
10. HOTIGNSO -
Answer:
1. BASKETBALL
A team sport that is placed in an indoor basketball court between two teams.
2. SOFTBALL
A team sport plays in an outdoor stadium or ground. It is similar to a baseball game.
3. COURT
A court is a place where any indoor game or team sport takes place.
4. REFEREE
A referee is a person or official that watches a game closely and decides if the game is played with rules or not.
5. UMPIRE
An umpire is a field official to look after the game to see if everything is according to the rules.
6. TRAVELLING
7. VOLLEYBALL
It is also team game plays in open field or beach between two teams where a net is placed between the teams.
8. FOUL
Foul is a penalty for breaking the rule of the game decides by umpire or refree.
9. INNING
An inning is the part of the game which is played by one of the team
10. SHOOTING
a microwave with a frequency of 5.0 x 10 2 hertz has a period of
Hello,
QUESTION)✔ We have: T = 1/f; with T in s, and f in Hz
T = 1/5,0 x 10² Hz T = 2,0 x 10⁻³ sThe period of the microwave is therefore 2 ms.
Answer:
2.0x10^-11
Explanation:
T=1/f
T=1/5.0x10^10
T= 2.0x10^-11
PLEASE HELP
Question: How do the number of beats relate to the frequencies of the two sound waves?
Answer:
The beat frequency is always equal to the difference in frequency of the two notes that interfere to produce the beats. So if two sound waves with frequencies of 256 Hz and 254 Hz are played simultaneously, a beat frequency of 2 Hz will be detected. ... These sounds will interfere to produce detectable beats.
Explanation:
Is positive charge in
the nucleus of an
atom of an element
equal to its atomic
number?
Answer:
yes the nucleus of an
atom of an element
equal to its atomic
number
Describe the moons of Mars?
Answer:
The two moons of Mars are Phobos and Deimos. They are irregular in shape. Both were discovered by American astronomer Asaph Hall in August 1877 and are named after the Greek mythological twin characters Phobos (fear) and Deimos (panic) who accompanied their father Ares into battle, SO they were irregular in shape
Explanation:
Why are temperatures of the currents generally colder at the poles than the equator?
A. Tilt of the Earth on its axis
B. Angle of the sun's rays are less direct
C. Angle of the sun's rays are more direct
D. The Earth's revolution around the sun.
Answer:
the answer is A
Explanation:
a subwoofer is a type of speaker which plays only the very low notes in a song or movie, which following frequencies would you expect to be able to hear from a subwoofer
10hz
25hz
750hz
1,050hz
Answer:
25z
Explanation:
how is urine produced
Urine is a liquid by-product of metabolism in humans and in many other animals. Urine flows from the kidneys through the ureters to the urinary bladder. Urination results in urine being excreted from the body through the urethra.
Urine is a liquid by-product of metabolism in humans and in many other animals. Urine flows from the kidneys through the ureters to the urinary bladder. Urination results in urine being excreted from the body through the urethra.
why do colliding objects of unequal mass experience different effects
what are the types of federal court cases
Answer:
More specifically, federal courts hear criminal, civil, and bankruptcy cases. And once a case is decided, it can often be appealed.
Explanation:
I hope this helps and pls mark me brainliest! Thank you :)
Answer:
There are many types of federal court cases. Examples are civil, criminal, bankruptcy. There are also special "military courts" for cases related to military crimes like desertion, etc.
Explanation:
An ipod uses a standard 1.7 volt battery. How much resistance is in the circuit if it uses a current of 0.03 amps
Answer:
R = V ÷ I = 1.5V ÷ 0.01A = 150Ω
Explanation:
150 is the answer:)
If the pelican was traveling 8.79 m/s but was only 2.7 m above the water, how far would the fish travel horizontally before hitting the water below?
Answer:
6.52m
Explanation:
The horizontal distance travelled is known as its range. This is expressed as;
Range = u* √2H/g
u is the speed of the pelican
H is the maximum height
g is the acceleration due to gravity
Range = 8.79*√2(2.7)/9.8
Range = 8.79 * √5.4/9.8
range = 8.79*√0.5510
Range = 8.79*0.7423
Range = 6.52
Hence the fish will travel 6.52m before hitting the water below
What is the atomic number the atom shown?
A. 3
B. 13
C. 14
D. 27
Answer:
13
Explanation:
Brainlest pls
Answer:
B-13
Explanation:
The protons listed in the atom are 13, and the protons are the same number as the atomic number.
Neptune and Uranus are called the "ice giants" due to the presence of ice on their surface. Which is a reasonable explanation for why there aren't any ice giants in the group of terrestrial planets? A. They have rocky surfaces. B. They do not have rings. C. They are too close to the sun.
Answer:
C. They are too close to the sun.
Explanation:
Due to their relative location the gas giant such as neptune and Uranus are mostly cold and icy planets as they are located deep into the solar system and have large distance firm the sun.As compared to those of the earth and other rocky planets. Due to their distance they consist of primitive atmosphere and have slow rotation and movement.I. Is the moon luminous or non-luminous? Give a reason for your answer.
Answer:
non-luminous
Explanation:
Moon doesn't give off light of its own, that's why the moon is considered a non-luminous body
1. Which of the following decreases with an increase in altitude?
a. air pressure
b. visibility
c. water vapor
d. none of the above
Answer: air pressure
Explanation:
Earth is taken as zero electric potential, through it has net negative charge because of
a.its layer radius
b.its smaller radius
c.heavy mass
d.its large permittivity
Answer:
"Its larger radius"
Explanation:
The electric potential is given by :
[tex]V=\dfrac{kQ}{r}[/tex]
Where
k is the electrostatic constant
Q is electric charge
r is the radius
For Earth, the value of r is very large and Q is very smaller. Due to large r, the potential of Earth's surface is almost zero. Hence, the correct option is (a).
how do I measure the wavelength/amplitude
Answer:
The wavelength can always be determined by measuring the distance between any two corresponding points on adjacent waves. In the case of a longitudinal wave, a wavelength measurement is made by measuring the distance from a compression to the next compression or from a rarefaction to the next rarefaction.
Explanation:
Thank me later
Answer:
Explanation:
So what you want to do is measure the wavelength for the wavelength by putting the ruler under or above the distance (show in picture).
amplitude you want to measure it inside of the wave. so when measuring move the ruler sideways.
( i hope this makes sense)
If the distance between two spherical charged objects increases by a factor of two, then the electrical force between the objects
Answer:a repulsive electrical force. ... postulates that an electric field surrounds each charged object. If the distance between two spherical charged objects increases by a factor of two, then the electrical force between the objects. decreases by a factor of four.
Explanation: does this help
A 5 kg cart moving at 2 m/s collides with a 10 kg cart that is at rest. What happens to the momentum of the 5 kg cart after the collision? *
Answer:
The velocity stays the same
Explanation:
Given data
Mass M1= 5kg
U1=2m/s
V1=???
Mass M2= 10kg
V2= 0m/s
U2=0m/s
We know that the law of conservation of linear momentum is expressed as
M1U1+M2U2= M1V1+M2V2
substitute
5*2+10*0=5*V1+10*0
10=5V1
V1= 10/5
V1= 2 m/s
The 5kg mass will bounce back with a velocity of 2m/s
Hence the velocity stays the same
3 ways objects can be grouped are
Answer:
Transparent = lets light pass through without significant interference
Translucent = lets light pass through with significant interference
Opaque = Doesn't let light pass, instead absorbs it
A yo-yo is twirled on a 4 meter long string so that its tangential
speed is 16 m/s. If the string is only 2 meter long and the revolutions per
second stay constant, what is the new tangential speed?
Answer:
8m/s
Explanation:
i think i had this question on a test i'm taking so i'm assuming i cannot say for sure if this is correct
Can someone please help me with science
Answer:
The mass is one of the factors affecting gravitational field strength.
Weight (Force) = mass × gravitational field strength
= 0.10 × 10 (10 is the fixed gravitational field strength on Earth)
= 1.0 N
11. What are mechanical waves caused by?
Answer: mechanical waves are caused by the disturbance of vibration in matter, whether solid, gas, liquid, or plasma.
Explanation:
When a hot object makes a cold object warmer what is it called