Two instruments based on Archimedes' principle
LactometershydrometersExplanation:
Archimedes' principle states -
when a body is partially or completely immersed in a fluid , the fluid exerts an upward force on the body which is equal to the weight of the fluid displaced by the body.OR
when a body is immersed fully of partially in a fluid , it experiences an upward force that is equal to the weight of the fluid displaced by it.Applicatios : Lactometer , hydrometer.
Please heelllllpppppppppppopppppop
Answer:
Explanation:
I'm assuming you need this answer quickly.
Using what we know:
The energy of a single 400 nm photon is 3.1 eV.
So a photon of 412 nm wavelength would have the energy of 4.0 ev.
A set of water waves travels at 10.0 m/s , and 5.0 waves pass you in 4.0 s. What is the wavelength of the waves?
Answer:
8 meters
Explanation:
Frequency of waves = 5 waves / 4 s = 1.25 Hz
speed = frequency * wavelength
speed/ frequency = wavelength
10 / 1.25 = 8 m
In Alberta, which of the following statements is true?
A. Only adults must be restrained in a vehicle.
B.All children must have booster seats.
C.Babies must be restrained in the front seat only.
D.All occupants must be restrained in a vehicle.
How do u solve this with steps really need help asap
Answer:
170 N
Explanation:
Impulse is the change in momentum. Momentum is the product of mass and velocity. These are related to applied force by ...
F·Δt = m·Δv
__
Here, the velocity goes from 0 to 34 m/s in 0.0116 s. The mass is 0.058 kg. Filling in the given values, we have ...
F(0.0116 s) = (0.058 kg)(34 m/s)
F = 0.058×34/0.0116 kg·m/s² ≈ 170 N
The required force is 170 newtons.
Light of different wavelengths look different ______ to humans:
A.) visible spectrum
B.) electromagnetic spectrum
C.) colors
D.) absorption
Answer:
C) colors
Explanation:
The wavelengths of light determine the color that we see. Humans cannot see lightwave absorption, but we can see light in the form of colors.
Shorter wavelengths (indicating higher frequencies) look violet,
and Longer wavelengths (indicating lower frequencies) look more red
explain the causes of atmospheric pressure and why it changes with altitude?
Answer:
As altitude increases, the amount of gas molecules in the air decreases—the air becomes less dense than air nearer to sea level. This is what meteorologists and mountaineers mean by "thin air." Thin air exerts less pressure than air at a lower altitude
Which components of static electricity does a photocopier use?
ex. charging by conduction, friction, etc
Answer:
For a photocopier to work, a field of positive charges must be generated on the surface of both the drum and the copy paper. These tasks are accomplished by the corona wires. These wires are subjected to a high voltage, which they subsequently transfer to the drum and paper in the form of static electricity.
How much does a 200 kg car weight?
Answer:
22 kgs
Explanation:
440.925 pounds if thats what you mean but kgs is the weight system for everyone but america
Chris shines a white light onto a surface, and the surface appears to be green. What color will the surface appear if he shines a combination of blue and green light on the surface?.
Answer: just realized this is more advanced physics so if this doesn't seem right I apologize, I had a really bad physics teacher lol. So ignore this for now!
Hey there! I think this might just be basic color mixing! The color would be a turquoise
Explanation: R G B make up our visible light spectrum. This has documented graphs. Through basic use of one, you can determine that the color would be a blue-green, commonly referred to as turquoise! There are many more color combinations then just this one as well!
pls help in these 2 questions
Answer:
Taking forces along the plane
F cos θ - M g sin θ -100 = M a net of forces along the plane
F = (M a + M g * .5 + 100) / .866 solving for F
F = (80 * 1.5 + 80 * 9.8 * .5 + 100) / .866 = 707 N
F = 707 N acting along the plane
Fn = F sin θ + M g cos θ forces acting perpendicular to plane
Fn = 707 * 1/2 + 80 * 9.8 * .866 = 1030 Newtons forces normal to plane
(this would give a coefficient of friction of 100 / 1030 = .097 = Fn)
What is the difference between
longitudinal waves that have
different amplitudes?
Answer:
Wave amplitude of a transverse wave is the difference of height between a crest and the resting position. Wave amplitude of a longitudinal wave is the distance between particles of the medium where it is currently compressed by the wave.
Answer:
A wave caused by a disturbance with more energy has greater amplitude
Explanation:
The amount an object weighs depends on the presence of —.
Answer:
The weight of an object is dependent upon the value of the acceleration of gravity.
What is the mass of an object that accelerated at 5 m/s2 with a force of 45 n?
Answer:
9kg.
Explanation:
Data obtained from the question include:
F (force) = 45N
a (acceleration) = 5 m/s2
m (mass) =?
Force is simply the product of mass and acceleration as given by the formula: F = ma. With this formula (i.e F = ma) we can easily calculate the mass of the object. This is illustrated below:
F = ma
m = F/a
m = 45/5
m = 9kg.
Therefore, the mass of the object is 9kg
The diagram shows a roller-coaster track. Assume that the system is closed. At point D, the roller-coaster is upside-down and at the top of the vertical loop.
which statement best describes the potential and kinetic energies of a roller-coaster car at point D?
When charging a fully depleted battery with a 220/240-volt charging dock, 2023 leaf s can be fully charged in about ________.
When charging a fully depleted battery with a 220/240-volt charging dock, Nissan LEAF can be fully charged in about 7.5h.
What is battery?It converts the electro chemical energy to the electrical energy when connected across the two ends of the conductor.
The Nissan LEAF comprises of a standard 120-V charging cable. In order to charge it fully, we need a 220/240Volts battery. The time take take n to fully charge is 7.5 hours.
Thus, when charging a fully depleted battery with a 220/240-volt charging dock, Nissan LEAF can be fully charged in about 7.5 h.
Learn more about battery.
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White light is passed through a filter that only allows only yellow, green and blue light to pass through onto a piece of blue fabric. what color does the fabric appear to have under this light?
a.
red
c.
blue
b.
green
d.
black
Answer:
White light contains yellow, green, and blue - only the blue light will be reflected giving the blue color.
So the green and yellow light thru the filter will not be reflected and the fabric will still appear blue.
blue is correct
A gas has a variable volume.
True
False
Answer:
True
Explanation:
Gas always live in free state but some gas is not . We can said that mostly gas volume can be changeable during disturbing by environment situation.
9. An empty, massless cubo is monsured to have all sides equal to 11 cm. It is Ponting in water and will slowly be filled with sand
that has a density of 3.5 g/cm! What volume of sand will cause the box to sink?
Answer:
please refer to the attachment.
How much force is needed to accelerate a 100 kg car at a rate of 3 m/s
Question 8
If a cheetah can run at a speed of 100 km/h for the initial 500 m of its chase, h
much time would it take to catch its prey that is at a distance of 100 m?
O 1.5 s
O 2.3s
O 3.6s
O 4.8s
Answer:
3.6 s
Explanation:
100 km/hr =27.77 m/s
100/27.77=3.6 sec
What is physics and how does it affect every day life
Explanation:
Physics, or the study of matter, energy, and the interactions between them, helps us to understand the laws and rules that govern the physical world.
A force of 800 n is used to stop an object with a mass of 50 kg moving with a velocity of 35 m/s. how long will it take to stop this object?
variables:
equations:
answers
Answer:
KE = F * S initial kinetic energy will expended in stopping object
1/2 M V^2 = F * S
S = 1/2 * 50 * 35^2 / 800 = 38.3 m stopping distance
If you need to know the stopping time involved -
(V2 - V1) = a t where the change in velocity is 35 m/s
a = F / M = 800 / 50 = 16 m/s^2 deceleration of mass
t = 35 / 16 = 2.2 sec
a racing car has a uniform acceleration of 5 metre per second square what distance will it cover in 10 seconds after the start
will mark as brainlist
in what unit do we measure electric current?
Answer:
Ampere
Explanation:
The SI unit of electric current is Ampere (A) after French physicist Andre Ampere who discovered electrical current
What label should mateo place in the marked cell? uses electrical energy provides electrical energy measures electric current controls electric current
The product label which Mateo should place in the marked cell is that it: B. provides electrical energy.
What is a product label?A product label can be defined as a paper-document with specific information about the chemical elements, nutrients, and other chemical compounds that are present in a product and its general use or function.
In this scenario, the product label which Mateo should place in the marked cell shown in the image attached below is that, this product was designed and developed to provide electrical energy, based on the electrical symbol for battery.
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11. Which of these is a way to make an electromagnet stronger?
a putting a switch in the electrical circuit
b replacing the iron core with a copper core
© replacing the copper wire with plastic wire
wrapping the wire around the iron core more times
Answer:
wrapping around the wire around iron core several times
Explanation:
adding more turns to the coil. increasing the current flowing through the coil.
HELP PLEASE
A bicyclist travels 10 km in half an hour then rests for half an hour, then travels 50 km in three hours. What was the bicyclist’s average speed over the entire trip?
How long would it take an object traveling 12 m/s to go 60 m?
If a car travels 60km/hr, how long would it take the car to travel 300km?
answer:
Xi + Xf =10km+30km=60km[tex] v \times \frac{x}{t} [/tex]A block and a ball have the same inertia and move with the same initial velocity across a floor and then encounter different ramps. The ramps are identical in every way except for the fact that there is enough friction for the ball to roll without slipping and the block slides without friction up the ramp. Which one makes it furthest up the ramp
The ball rolling without slipping will make it furthest up the ramp because it has greater kinetic energy.
Conservation of energy
The height rolled by each object can be determined by applying the principle of conservation of energy.
The ball rolling without slipping will have additional rotational kinetic energy.
The block won't have additional rotational kinetic energy.
Total K.E ball > Total K.K block
ΔP.E = ΔK.E
Thus, the ball rolling without slipping will make it furthest up the ramp because it has greater kinetic energy.
Learn more about kinetic energy here: https://brainly.com/question/25959744
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How energy efficiency can reduce energy consumption?
Answer:
The energy efficiency represents the things you can do with some amount of energy, and if you can do more with less, than it reduces the energy consumption.
Explanation:
The answer to this question is actually very simple. Imagine that you use only the half of the energy you produce, an efficiency of 50%. Lets say you need 5kJ, so you would need to produce 10kJ, because you can consume only the half. Now, imagine you increase the efficiency, you use exactly what you can generate, (efficiency of 100%). In this case, if you needed only 5kJ you would need to generate only 5kJ.
An object of mass weighing 5.24 kilograms is raised to a height of 1.63 meters. What is the potential energy of the object at that height? Note that acceleration due to gravity is 9.8 meters/second2.
A.
65 joules
B.
84 joules
C.
91 joules
D.
1.0 × 102 joules
E.
1.5 × 102 joules
Answer:
84 joules
Explanation:
potential energy = mgh
5.24×1.63×9.8
= 84 joules