Answer:
Mosquito Larve commonly called wigglers live in water from 4 to 14 days depending on water temperature
A simple pendulum makes 540 complete oscillations in a minute, so its frequency is ........... HZ
A-3
B-6
C-9
D-12
Answer:
a
Explanation:
time=540×60
=32400
f=1÷t
=1÷32400
f=3.09
f=3
The frequency is 3 Hz.
To calculate the frequency of the pendulum, the values given are
t = 540 minute
What is frequency of simple pendulum?The frequency of the simple pendulum can be described through the pendulum moves and come back to its own position for the specific period of the time. Also the pendulum frequency depends upon its length and mass.
Thus, frequency formula can be,
ω = √g/l
T = 2π / ω
Frequency, f = 1 / T = ω / 2π
As we have to find the frequency, the time period will be reciprocal.
f = 1/ T Hz.
t = 540 per minute
= 540 × 60 seconds
= 32400 seconds
f = 1 / 32400
= 3.08 × 10 ⁻⁶
f = 3 Hz
The frequency thus calculated as 3Hz.
Hence, Option A is the correct answer.
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The specific heat of oxygen is 3.47 J/gºC. If 750 J of heat is added to a 24.4 g
sample of oxygen at 295 K, what is the final temperature of oxygen? (Round
off the answer to nearest whole number)
Answer:
304 K
Explanation:
At the base of a hill, a 90 kg cart drives at 13 m/s toward it then lifts off the accelerator pedal). If the cart just barely makes it to the top of this hill and stops, how high must the hill be?
Answer:
the height of the hill is 8.622 m.
Explanation:
Given;
mass of the cart, m = 90 kg
speed of the cart at the base, v = 13 m/s
Let the height of the hill = h
Apply the principle of conservation of energy, to determine the height of the hill.
¹/₂mv² = mgh
¹/₂v² = gh
[tex]h= \frac{1}{2} \times \frac{v^2}{g} \\\\h = \frac{1}{2} \times \frac{13^2}{9.8} \\\\h = 8.622 \ m[/tex]
Therefore, the height of the hill is 8.622 m.
Two football players with mass 70 kg and 90 kg run directly toward each other with speeds of - 6 m/s and +3 m/s respectively. If they grab each other as they collide, what will be the combined speed of the two players just after the collision?
Answer:
they will fall down
Explanation:
force prevents things from floating above the ground. *
frictional
muscular
gravitational
(ii) Calculate the force required to accelerate a mass of 60 kg at 2.5m/s2
force =
[2]
Answer:
Force = 150 Newton.
Explanation:
Given the following data;
Mass = 60kg
Acceleration = 2.5m/s²
To find the force;
Force = mass * acceleration
Force = 60 * 2.5
Force = 150 Newton.
Therefore, the force required to accelerate this mass is 150 Newton.
On her trips from home to school, karla drives along the streets after exiting the driveway. She drives 1.85 miles south, 2.43 miles east and 0.35 miles north. determine the magnitude of karla's resultant displacment.
A runner starts a race at rest and reaches her top speed of 8.6m/s in 19.0s. What is the average acceleration?
Answer:
Average acceleration = 0.45 m/s²
Explanation:
Given the following data;
Initial velocity, u = 0m/s
Final velocity, v = 8.6 m/s
Time, t= 19 seconds
To find the average acceleration;
In physics, acceleration can be defined as the rate of change of the velocity of an object with respect to time.
This simply means that, acceleration is given by the subtraction of final speed from the initial speed all over time.
Mathematically, acceleration is given by the formula;
[tex]Acceleration = \frac{initial speed - final speed}{time}[/tex]
Substituting into the formula, we have;
Acceleration = (8.6 - 0)/19
Acceleration = 8.6/19
Average acceleration = 0.45 m/s²
What information is needed to calculate the speed of a falling object?
A. Height that it was dropped from
B. All of these are needed to calculate the velocity
C. Volume of the object
D. Mass of the object
How do airplanes stay in air?
Answer:
A plane's engines are designed to move it forward at high speed. That makes air flow rapidly over the wings, which throw the air down toward the ground, generating an upward force called lift that overcomes the plane's weight and holds it in the sky. The wings force the air downward and that pushes the plane upward.
Explanation:
planes stay in air because of 2 reasons :
Power of thier enginesAerodynamicsPlane's wings are designed to push the air downwards and letting the plane to lift off and stay in air..
Just need to confirm an answer
A ball of mass 0.2 kg is kicked straight up from ground level. Ignoring air resistance, its gravitational potential energy as it reaches its maximum
height is 10 J. The initial speed with which the ball was kicked is most nearly
(A) 20 m/s (B) 10 m/s (C) 5 m/s (D) 1 m/s
Answer:
B
Explanation:
Remark
If, when it reaches its maximum height where the PE is the greatest, that the maximum energy is when the ball is first kicked. That would mean its starting energy is 10 Joules.
Formula
KE = 1/2 m v^2
Givens
KE = 10 J
m = 0.2 kg
v = ?
Solution
10 = 1/2 * 0.2 * v^2
10 * 2 = 0.2 * v^2
20 = 0.2 * v^2
20/0.2 = v^2
100 = v^2
v = 10 m/s
PLWASE HELP ILL DO ANYTHING
A stone at rest is dropped from a cliff, and the stone hits the ground after a time of 3 s. What is the stone's velocity when it hits the ground? O
2.94 m/s
3.3 m/s
323 m/s
29.4 m/s
Answer:
The stone is accelerating at 9.8 m/s². If we multiply that by three seconds, we get 29.4 m/s.
Help someone :(((((((((((((((
Wave Speed (M/s) = Frequency (Hz) x Wavelength (M)
Wave Speed = 3500Hz x 2.8M = 9800M/s
Answer = Top one
Answer:
A
Explanation:
3500Hz*2.5m=9800m/s
Give Brillienst please!!!!
(???) Is iz allergic to peanut butter jigglys, I JIGGLE IN THE WIND!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Need help with these 2 questions ??????!!!!! Hurry this is due soon
Answer: The first one is A and C
Explanation:
Answer:
2 is A
3 is C
Explanation:
The reason why two is a is think of it like this. atoms have to be combined together to make a molecule. So in other words you need letters to create a word.
3 is c because in a recipe you have to have the right proportions. Just like you have to have the right proportions of atoms to create a molecule.
The drawing on the right shows a man (mass = 70kg) and the child (mass = 35 kg) push each other apart. The man moves away with a speed of 0.3 m/s relative to the ice.
Calculate the velocity of the child relative to the ice.
LET MOMENTUM EQUATION GUIDE YOUR THINKING...
SHOW YOUR WORK - INCLUDE UNITS
Answer:
Hope it would help you.Refer to the attachment..
PLEASE HELP!!! GIVING BRAINLIEST!! ill also answer questions that you have posted if you answer this correctly!!!! (60pts)
Answer:
Daniel Bernoulli
Explanation:
Hope this helps! :)
Answer:
Daniel Bernoulli is the person who discovered that fast-moving fluids produce less pressure and slow-moving fluids produce greater pressure.
Brainliest if right.
Someone fires a 0.04 kg bullet at a block of wood that has a mass of 0.5 kg. (The block of wood is sitting on a frictionless surface, so it moves freely when the bullet hits it). The wood block is initially at rest. The bullet is traveling 300 m/s when it hits the wood block and sticks inside it. Now the bullet and the wood block move together as one object. How fast are they traveling?
Answer:
Explanation:
Remark
This is a conservation problem.
The momentum before impact = momentum after impact
momentum before
m = 0.04 kg
v = 300 m/s
momentum after
m = 0.5 kg + 0.04kg That's the mass of the block and bullet
v = ?
Solution
0.04 * 300 = 0.54 * x
12 kg m/s = 0.54 kg * x
12 / 0.54 = x
x = 22.22 m/s
What property of the wave is labeled F?
amplitude
crest
trough
wavelength
Two lamps, each having reisistance of 3 Ohms, connect in a series. What current will flow if a voltage source of 5 V is connected at input?
The current across the circuit is equal to 0.833A if a voltage source of 5 V is connected at the input.
What is Ohm's law?Ohm’s law states that the potential difference across a circuit is directly proportional to the current flowing through it. Assuming temperature and all other physical conditions remain constant. Resistance's S.I. unit is rho (Ω), and the current raises the temperature.
The mathematical expression of potential difference provided by Ohm/s law is:
V = IR
Where V is the voltage difference and R is the resistance and I the current flowing.
Given, the resistances in a series circuit, R = 3 + 3 = 6 ohm
The voltage difference across the circuit, V = 5 V
The current flowing through the circuit will be:
V = I × R
I = V/R
I = 5/6
I = 0.833 A
Therefore, the current across the circuit is equal to 0.833 A.
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HELP PLSSSSSSSSSS ASAP :)))))
Answer:
Explanation:
Pooh Shiesty, that's my dawg
But Pooh, you know I'm really shiesty
You told all them O.T. ni ggas that you really slide
Tell the truth about your gang, they really dyin'
I got my own fire, don't need security in the club
All that woofin' on the net , I thought you was a thug
They ain't got nowhere to go, I sh0t up everywhere they was
Yeah, you know who took that - from you
Come get it back in blood
Come get it back in blood
H E L P A S A P P P P P P P P P !
Answer:
Higher Amplitude = Higher Energy.
Explanation:
As you could see the higher number the amplitude is the energy also gets higher!
A 1 kg water bottle have 0.15m above your head How much GPE does it have
Answer:
GPE = 1.47 Joules.
Explanation:
Given the following data;
Mass = 1kg
Height = 0.15m
We know that acceleration due to gravity is equal to 9.8m/s²
To find the gravitational potential energy;
Gravitational potential energy (GPE) is an energy possessed by an object or body due to its position above the earth.
Mathematically, gravitational potential energy is given by the formula;
[tex] G.P.E = mgh[/tex]
Where;
G.P.E represents potential energy measured in Joules.
m represents the mass of an object.
g represents acceleration due to gravity measured in meters per seconds square.
h represents the height measured in meters.
Substituting into the formula, we have;
GPE = 1*9.8*0.15
GPE = 1.47 Joules.
A 2 kg object is falling at 3 m/s at what rate is gravity working on the object
Answer:
6kgm/s
Explanation:
Let the rate of gravity be the momentum of the body
Momentum = mass * velocity
Given
Mass = 2kg
velocity = 3m/s
Momentum = 2 * 3
Momentum = 6kgm/s
Hence the rate at which the gravity is working is 6kgm/s
A wave has a frequency of 875 hz and a wavelength of 352 m. At what speed is this wave traveling 
Answer:
308,000 or 30.8×10^3
Explanation:
v=f×lamda
v is ?, f is 875Hz, lamda is 352m
v=875×352
v=308,000
v=30.8×10^3 m/s
an ocean wave has a wavelength of 15 meters and is moving at 2.5 m/s. what is the frequency
Answer:
frequency is .167/s for this wave
Answer:
wave speed=frequency×wave length
frequency=15/2.5
=6
i hope this helps
a wave has wavelength of 20m and a speed of 450m/s. what is the frequency of the wave
Answer:
22.5/s is the frequency of the wave
Given:
Wavelength, λ = 20 mSpeed of light, C = 450 m/sWe know,
→ [tex]Frequency (f) = \frac{C}{\lambda}[/tex]
By substituting the values,
[tex]= \frac{450}{20}[/tex]
[tex]= 22.5 \ Hz[/tex]
Thus the approach above is right.
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Please answer all of these questions and you will get the brainlist
Answer:
1. L=mgh= 0.1x4x9.8=4.0J
2. L= 2x3x9.8=59J
What is the magnitude of the largest net force that can be produced by combining a force of 6.0 N
and a force of 8.0 N? What is the magnitude of the smallest such force?
Answer:
10N
Explanation:
The formula for calculating the resultant is expressed as;
R = √F1²+F2²
F1 and F2 are the forces
Given
F1 = 6.0N
F2 = 8.0N
R = √6²+8²
R = √36+64
R = √100
R = 10.0N
Hence the magnitude of the net force is 10N
Why does it take a long time for a train to come to a complete stop?
Answer:
Trains stop in their own time.
Every freight train, every situation, every load is different. The distance it takes to halt a train in an emergency is based on multiple factors: the speed when the brakes are applied, the track's incline, the number of cars hooked behind the locomotives and the loading of those cars, the "brake delay" inherent in the train's hydraulic system, the friction-causing metallurgy of the wheels and tracks, the weather.
Even the engineer behind the controls can't know on any given day how long it would take to stop the train.
"There is no specific rule of thumb on that," said Greg Udolph, general manager of the Texas State Railroad, a freight and tourist line in East Texas running from Palestine to Rusk. "If the track is wet with dew it changes. Everything that can affect it does. A train takes as long to stop as it takes to stop. Sometimes it can be a mile. Sometimes it's less, sometime's it's more."
Explanation:
Hope this helps :)