Answer:
h = 4T/dgr
Explanation:
Using Laplace law for spherical bubble, the pressure difference P'- P = 4T/r where T = surface tension and r = radius of sphere.
Now, the pressure difference on the hollow sphere P' - P = dgh where d = density of liquid, g = acceleration due to gravity and h = maximum depth to which sphere must be immersed.
So dgh = 4T/r
h = 4T/dgr
Which of these is not a standard unit?
a. second
b. metre
c. hand span
d. gram
Answer: Hand span
Explanation: Hand span is not a standard unit.
Second is the unit of time.
Meter is the unit of length or distance covered by an object.
Gram is the unit of weight of an object.
Hand span is not a standard unit. This is because the size of hand varies from person to person. Hence, the correct option is (c) "hand span".
What is the current if a charge of 25 coulombs passes in 5 seconds?
Answer: 5 amps
Explanation: I = Q/t
The process of sediments being compacted and cemented to form sedimentary rocks is called
Answer:
Lithification is the answer.
Why the same side of the moon is always facing Earth?
A.The time it takes the moon to rotate one time and the time it takes Earth to rotate one time are the same.
B.The time it takes the moon to rotate one time and the time it takes theEarth to orbit the sun one time are the same.
C.The time it takes the moon to rotate one time and the time it takes the moon to orbit Earth one time are the same.
D.The time it takes the moon to orbit Earth one time and the time it takes the Earth to orbit the moon one time are the same.
Answer:
A
Explanation:
the moon rotates exactly once every time it circles the Earth.
What is the potential energy at Z
Answer:
It would be 2,500
Explanation:
The KE is 7,500 so the PE would be 2,500
Which is the correct definition for sea floor spreading
Each bat can produce different frequencies of ultrasound. Explain why this is useful if there are many bats hunting together.
Answer: Although low frequency sound travels further than high-frequency sound, calls at higher frequencies give the bats more detailed information--such as size, range, position, speed and direction of a prey's flight. Thus, these sounds are used more often.
Explanation:
Why would geothermal energy NOT be a possible energy source for many regions of the country?
A. Geothermal energy depends upon a nonrenewable resource.
B. Geothermal energy is only found in Arctic regions.
C. Geothermal energy is not always found in an area that is easily accessible.
D. Geothermal energy can only be used to grow tropical fruits.
Geothermal energy is not always found in an area that is easily accessible. (C)
Geothermal energy is not a possible energy source for many regions of the country. Because geothermal energy is not always found in an area that is easily accessible. Option C is correct.
What is geothermal energy?Geothermal energy is the thermal energy in the Earth's crust that comes from the planet's creation and the radioactive decay of components in nearly equal amounts.
The disadvantage of using the geothermal energy is;
A. It is available only in limited areas.
B. It can cause air and groundwater pollution.
C. It is difficult to transport from place to place.
Geothermal energy is not a possible energy source for many regions of the country . Because geothermal energy is not always found in an area that is easily accessible.
Hence, option C is correct.
To learn more about the geothermal energy, refer to the link;
brainly.com/question/1061324
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One day, Pinki was ironing the clothes in her room. After half an hour of ironing, the light went off and Pinki went outside to the lobby of her house to check it there was any problem in the household circuit. At the same time, she listened the voice of her 4 years old daughter from the same room where she was ironing the clothes. Her daughter was about to touch the hot electric iron but at the same moment, Pinki entered in the room and pushed her daughter back from that place.
(a) On which effect of electric current, does the electric iron works?
(b)State the effect of electric current described here.
(c) Mention the values showed by Pinki here.
PLEASE ANSWER ASAP
Answer:
(a) An electric iron works on the heating effect of electric current
(b) The heating effect of an electric current is the tendency for electric current to cause the temperature of the material through which it is flowing to rise due to the resistance of the material
The heating effect, 'E', is given by the formula, E = I²·R·t
Where;
I = The current flowing
R = The resistance of the material
t = The time the material takes to heat up
(c) The values showed by Pinki here is the value of care, concern and prevention, to prevent the harmful effect of the high heat on the skin of her daughter
Explanation:
What are the three forms of water discussed in the passage?
Answer:
The three forms of water are gas, liquid, and ice, I'm not sure if these were mentioned in the passage since you did not attach a picture.
Please mark this the Brainliest.
A sled starts off with an initial velocity of 8 m/s and slows down to 2 m/s after 3 seconds. What was its acceleration?
Answer:
-2m/s
Explanation:
The current in the wires of a circuit is 60.0 milliAmps. If the
voltage impressed across the ends of the circuit were
doubled and the resistance were tripled, then its new current
would be ___ milliAmps.
Answer:
I' = 40 mA
Explanation:
Given that,
The current in the wires of a circuit is 60.0 mA.
If the voltage impressed across the ends of the circuit were doubled and the resistance were tripled such that,
V' = 2V and R'=3R
The relation between current, voltage and resistance is given by :
V = IR
Let I' be the new current. So,
V'=I'R'
⇒ [tex]I'=\dfrac{V'}{R'}\\\\I'=\dfrac{2V}{3R}\\\\I'=\dfrac{2}{3}\times \dfrac{V}{R}\\\\I'=\dfrac{2}{3}\times I\\\\I'=\dfrac{2}{3}\times 60\\\\I'=40\ mA[/tex]
So, the new current would be 40 mA.
How fast is a skydiver going after 5 seconds or free fall and how far did he fall
Answer:
It's typically around 120mph. You'll reach this speed a few seconds into your jump, so for those few moments straight out the door, you'll be falling a bit more slowly and therefore covering less distance. We usually estimate around 10 seconds for the first 1,000 feet, then 5 seconds for each 1,000 feet after that.
Explanation:
A weightlifter lifts a set of weights a vertical distance of 2.0 m. If a constant net force of 350 N is exerted on the weights, what is the net work done on the weights?
Answer:
700 Joules
Explanation:
The work done equals force times distance. Just multiply your two values there.
Side note: It would be more impressive if he'd done it in 1 second rather than 5. You know why? Because POWER=WORK/TIME. The less time it takes him to lift the weight with the same force and distance, the more powerful he is!
Why sound waves are called mechanical waves
Answer:
Because they travel by interacting within other particles.
Explanation:
Sound cannot travel in a vacuum, sound waves need to interact with other particles in order to be carried and this makes sound waves a mechanical wave.
______ tides, tides that are weaker than normal, happen when the Moon is at first or last quarter phase and the sun and moon interfere with each other.
A high
B low
C neap
D spring
Answer:
C. Neap Tides
Explanation:
Answer:
c neap tides
Explanation:
How are defenders on a baseball team positioned ?
Answer:
1 (pitcher), 2 (catcher), 3 (first baseman), 4 (second baseman), 5 (third baseman), 6 (shortstop), 7 (left fielder) 8 (center fielder), and 9 (right fielder)
Explanation:
There are nine fielding positions in baseball. Each position conventionally has an associated number, for use in scorekeeping by the official score
A snowflake falls from a cloud that is 500 m above the ground. It hits the ground after
being pulled down due to the acceleration of gravity (-10 m/s2). How fast will it be
going as it hits the ground?
Answer:
i wabnt the points lol
Explanation:
When drawing a vector, you should represent the magnitude of the vector by the length of the arrow. A. True O B. False
Answer: A. True
Explanation:
Answer:
A. True
Explanation:
A vector in this sense is a thing that has both magnitude (length) and direction.
Say you're walking at a speed of 5 miles per hour. If you keep walking in a straight line, then in two hours you will have walked 10 miles.
This doesn't give any information about where you started or any information about where you ended up after those 2 hours.
This is because "speed" is a scalar. It's a number with no associated geometry. It's just a magnitude. It's the magnitude of velocity.
Velocity is a vector.
Do all force interactions cause a noticeable change in motion? Explain your thinking?
!THANK YOU!
Answer:
No. If you apply a force in a chair, for example, you only will be able to move the chair if you beat the static frictional force. So, with that example, we can see that is not any type of force that can produce movement. The only force that produces movement is a result force which is non-zero.
The brakes of a 2000 kg car apply a force of 250 N to slow down a car as it comes off of an exit ramp. What is the acceleration of the car?
Why isn't all fresh water usable?
Answer:
2.5% of the earth's fresh water is unavailable: locked up in glaciers, polar ice caps, atmosphere, and soil; highly polluted; or lies too far under the earth's surface to be extracted at an affordable cost
3. Which of the following is determined by the
force of gravity?
A weight
B momentum
C mass
D distance
Answer:
A) weight is determined by the force of gravity.
Answer:
A weight
Explanation:
The answer is weight. That's why someone would weigh more on a different planet, because the planet would have a higher/lower force of gravity.
How are clouds related to water vapor and water droplets?
A.Water vapor in the air condenses to form tiny water droplets, and these water droplets make up clouds.
B.Water vapor in the air makes up clouds, but water vapor does not condense to form tiny water droplets that make up clouds.
C.Water vapor in the air condenses to form tiny water droplets, but the water vapor and water droplets do not make up clouds.
D.Water vapor in the air stays in the air as water vapor. The water vapor does not make up clouds, and it does not condense to form tiny water droplets.
Answer:
A!!!!!!!!!!!!!!!!!!!!!!!!!!!!
guys pls help which one is it
Answer:
a mixture
since it had the power to separate as the question says
Why is the Greenland ice sheet so important to understanding earths past climate?
Answer:
The ice sheet as a record of past climates
Scientists have, using those ice cores, obtained information on (proxies for) temperature, ocean volume, precipitation, chemistry and gas composition of the lower atmosphere, volcanic eruptions, solar variability, sea-surface productivity, desert extent and forest fires.
Answer:
The Greenland ice sheet is the last remaining ice sheet from the most recent ice age. Therefore, it can tell scientists about the climate conditions of that period.
Explanation:
Light my fire! Mix me with cerium and we’ll make beautiful mischmetal together!
What is the mass of a large ship that has a momentum of 1.60x10^9 kg*m/s and is moving at a velocity of 10m/s?
Answer:
160000000 kg.
Explanation:
p=mv
p=1.6x10^9
v=10m/s
rearrange and substitute:
(1.6x10^9)=m(10)
m=(1.6x10^9)/10
m= 1.6x10^8 kg.
A drone flies upward with a velocity of 5m/s and has a kinetic energy of 90J What is the mass of the drone?
O 5.4 kg
1.9 kg
7.2 kg
3.6 kg
Answer:
m = 7.2 kg
Explanation:
Given that,
The velocity of the drone, v = 5 m/s
The kinetic energy of the drone, E = 90 J
We need to find the mass of the drone. The formula for the kinetic energy of an object is given by :
[tex]K=\dfrac{1}{2}mv^2\\\\m=\dfrac{2K}{v^2}\\\\m=\dfrac{2\times 90}{(5)^2}\\\\m=7.2\ kg[/tex]
So, the mass of the drone is 7.2 kg.
West
East
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디
50 Newtons
40 Newtons
What is the net force on the box?
А
10 Newtons West
B
10 Newtons East
с
90 Newtons West
D
90 Newtons East