Assuming g=10N
upward force=600N(applied force)
downward force=(W)=(5x10)=50N
net force=600-50
=550N
F=(delta)P/t
(delta)P=m (v-u)
u=0m/s
(delta)P=mv
550=(5)(v)/0.1
550x0.1
55=5v
v=11m/s
there was no mention of any gravity acting on the object only applied force ,infact we aren't even given the constant
so many assumptions have been made whyyyyyyy!!!
what's your take on it scientists
What is the effect of increase in heat on:
1. Plastic
2. Iron
Explanation:
1.Plastic
Thermal Degradation – Plastic materials subjected to prolonged exposure to high temperatures will lose strength and toughness, becoming more prone to cracking, chipping, and breaking, at a rate in proportion to the temperature and time of exposure.
2.Iron
At room temperature, the iron atoms are in an unusual loosely packed open arrangement; as iron is heated past 912 degrees Celsius, the atoms become more closely packed before loosening again at 1,394 degrees Celsius and ultimately melting at 1,538 degrees Celsius
Melissa's hair stands up on end after she takes her wool hat off in the winter but not in the summer
Answer:
Static electricity
Explanation:
A static reaction is transpiring with the surrounding air as well as her hair.
The term group polarization refers to the tendency for.
Polarization refers to the tendency for acquiring specific orientation by the oscillation.
What is polarization?Polarization is a property that specifies the geometrical orientation of the oscillations. In a transverse wave, the direction of the oscillation is perpendicular as compared to other that have parallel.
So we can conclude that Polarization refers to the tendency for acquiring specific orientation by the oscillation.
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Where in their life cycle are stars on the main sequence?.
Answer ,,a main sequence stars burns through the hydrogen in it's core
Explanation:
When the stars go out
Eventually,reaching the end of its life cycle. At this point, it leaves the main sequence. Stars smaller than a quarter the mass of the sun collapse directly into white dwarfs
What is the period of a wave traveling with a speed of 20 m/s and the wavelength is 4.0 m?
Answer:
0.2s
Explanation:
wave formula
v=(lambda)f
20=(4)f
20÷4
=5Hz
1÷5
T=0.2s
The period of a wave travelling with a speed of 20 m/s and the wavelength is 4.0 m is 0.2 sec.
What is time period?
The length of time it takes a wave to complete one cycle is known as the wave's period. The frequency of the wave must be known in order to compute the wave period. The number of cycles a wave may complete in a period of time—typically one second—is its frequency.
wave formula
v = (lambda)f
20 = (4)f
20÷4
f = 5 Hz
T = 1/f
T = 1÷5
T = 0.2 sec
The period of a wave travelling with a speed of 20 m/s and the wavelength is 4.0 m is 0.2 sec.
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When energy is added to a wave, how can the wave change?.
Answer:
When waves overlap in-phase (crest meets crest or trough meets trough) the waves energy is additive and the amplitude increases.
Explanation:
When waves overlap out-of-phase (crest meets trough) the waves cancel and the amplitude (energy) decreases. When two interfering waves cancel each other out.
A car initially travels west with a kinetic energy of 10 J. Then it travels east at three times its original speed. What is its kinetic energy when it is traveling east
KE₁ = 1/2mv²
10 J = 1/2mv²
KE₂ = 1/2m(3v)²
KE₂ = 1/2mv².9
KE₂ = 10 . 9 = 90 J
The velocity of a car increases by 40 m/s in 80 seconds. What is the
acceleration of the car?
A. 40 m/s2
B. 0.5 m/s2
C. 120 m/s2
D. 0.25 m/s2
Answer:
B
Explanation:
a=v/t
a=(40m/s)÷(80s)
a=0.5m/s
Enter an expression, in terms of defined quantities and g, for the force that the scale under left pillar shows
The expression, in terms of defined quantities and g is therefore Fu =((mg/2) +2 mp) g
What is a Scale?This can be defined as a balance or any of various other instruments or devices for weighing.
The expression in terms of defined quantities and g, for the force that the scale under left pillar shows that Fu =((mg/2) +2 mp) g .
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The expression, in terms of defined quantities and g, for the force that the scale under left pillar is (m(b)/2+2m(d))g.
What is the equilibrium state of a system?Equilibrium is the location of the system, in which the system be static does not change its position with respect to time.
The image of the uniform beam which has two pillar is attached below. In this pillar,
The length of the pillar is L and the mass is m(b)Pillars located at L/3 from either end.The system is in equilibrium.A duck is shown has the mass m(d).The expression, in terms of defined quantities and g, for the force that the scale under left pillar has to be find out.
In the equilibrium position torque in left pillar is zero,
[tex]\tau_{right} =0[/tex]
It can be written as,
[tex]F_L\dfrac{L}{3}=m_bg\dfrac{L}{6}+m_dg\dfrac{2L}{3}[/tex]
[tex]F_L=\left(\dfrac{m_b}{2}+2m_d\right)g[/tex]
Thus, the expression, in terms of defined quantities and g, for the force that the scale under left pillar is (m(b)/2+2m(d))g.
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meters/second?
A car accelerates from 4 meters/second to 16 meters/second in 4 seconds. The car's acceleration is what meters/second squared
Answer:
the acceleration of the car is 3 m/s².
Explanation:
If two forces act on an object, what is the relationship between the two forces? (pls explain)
A. The larger force causes the same acceleration as the smaller.
B. The larger force causes more acceleration than the smaller.
C. The larger force causes less acceleration than the smaller.
D. The smaller force and the larger force are balanced and therefore causes no acceleration.
Answer:
B. The larger force causes more acceleration than the smaller.
Explanation:
For example, let me use a child and a grown up. The child represents the smaller force while the grown up represents the larger force. If they are pushing the same object of different sides, obviously the side with the grown up will push and move to the side of the child because it is stronger.
If the body temperature of a person is recorded as 37°C, what is the person’s body temperature in K? Round your answer to the nearest whole number.If the body temperature of a person is recorded as 37°C, what is the person’s body temperature in K? Round your answer to the nearest whole number.
Use the claim to answer the question.
Claim: Electromagnetic radiation can be described by a wave model or a particle model, depending on the situation.
Is this a scientific claim?
(1 point)
Yes, it can be backed up by experiments and evidence.
No, radiation is invisible, so there is no evidence to back up the claim.
Yes, any statement made by a scientist is a claim.
No, models can't be part of a scientific claim.
Scientific evidence such as reflection and photoelectric effect has proven the wave-particle model of electromagnetic radiation to be true.
What is electromagnet radiation?Electromagnetic radiation is radiation produced as a result of the interactions of the electric and magnetic fields.
Some forms of electromagnetic radiation include:
radio wavesmicrowavesultraviolet radiationvisible lightElectromagnetic radiation can be described using a wave model or a particle model.
The wave property of electromagnetic radiation include:
diffraction reflectionrefractionThe particle property of electromagnetic radiation include:
photoelectric effectCompton effect.Therefore, the wave-particle model of electromagnetic radiation is correct because it can be backed up by experiments and evidence.
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Answer:
I just took the identifying Claims Quick check
Explanation:
1. Claim: Electromagnetic radiation can be described by a wave model or a particle model, depending on the situation.
Is this a scientific claim?
Yes, it can be backed up by experiments and evidence.
2. A student states, "The wave model is better than the particle model for electromagnetic radiation because it is easier to understand." Is the student's statement a scientific claim?
No, it isn't because the statement is an opinion.
3. A student wants to make a scientific explanation regarding the wave model of electromagnetic radiation. Which of the following would be part of the scientific explanation?
Claims
4. A student makes this statement before conducting an experiment on electromagnetic radiation: "We expect the laser to diffract when passed through a slit." Which of the following explains why the student's statement is not a claim?
It is a prediction or hypothesis.
5. Which claim do scientists use to describe electromagnetic radiation?
Electromagnetic radiation exhibits properties of both particles and waves.
6. A physician is going to use high-frequency electromagnetic radiation to treat cancer in a patient. Which is a claim about this event?
A wave model is most useful for describing the frequency of the radiation.
A 2.0-kilogram ball rolls down a ramp. if the ball accelerates at a rate of 12 m/s2, the net force causing the acceleration is:
a:6 newtons
b:10 newtons
c:12 newtons
d:24 newtons
Answer:
D
Explanation:
f = ma
2 x 12 = 24
answer could differ since it's rolling down a ramp. if an angle is given our approach differs.
name one type of energy the washing machine wastes when spinning the clothes
Answer:
Electrical Energy
The Electricity Rotates the spinning part of Washing machine and It spinns clothes.
Extension Question
If the scale used to measure the mass of the unknown material maxes out at a
lower value than the actual mass of the material, then...
o the measured specific heat will be greater than the actual specific heat.
o the measured specific heat will be less than the actual specific heat.
The measured specific heat will be less than the actual specific heat if a lower value is gotten than the actual mass.
What is Specific heat capacity?This is defined as the quantity of heat needed to raise a substance's temperature by 1 degree Celsius.
If a substance has a low specific heat capacity , it loses water easily which makes the mass when measured to be smaller than the actual value.
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The Earth's biosphere is consists of
A(only the water on Earth that is in its solid form.
B(all of the Earth's water, including surface water, groundwater, snowcover, ice, and water in the atmosphere.
C(the part of the earth and its atmosphere in which living organisms exist or that is capable of supporting life.
D(the solid part of the earth consisting of the crust and outer mantle.
Answer:
The part of the earth and its atmosphere in which living organisms exist or that is capable of supporting life.
Explanation:
It’s in the definition of biosphere. “Bio” means “life,” so “biosphere” is that portion of the Earth capable of supporting life.
List the elements mentioned from hydrogen to iron in the order of their fusing temperature.
Explanation:
H
Hydrogen
-259.14 -252.87 0.00008988 (gas, 273K)
2
He
Helium
-272.20 (under pressure) -268.934 0.0001785 (gas, 273K)
3
Li
Lithium
180.54 1347 0.534
4
Be
Beryllium
1278 2970 1.8477
5
B
Boron
2300 3658 2.34
6
C
Carbon
3527 4827
(sublimes) 2.260 (graphite)
3.513 (diamond)
7
N
Nitrogen
-209.86 -195.8 0.0012506 (gas, 273K)
8
O
Oxygen
-218.4 -182.96 0.001429 (gas, 273K)
9
F
Fluorine
-219.62 -188.14 0.001696 (gas, 273K)
10
Ne
Neon
-248.67 -246.05 0.00089994 (gas, 273K)
11
Na
Sodium
97.81 882.9 0.971
12
Mg
Magnesium
648.8 1090 1.738
13
Al
Aluminum
660.37 2467 2.698
14
Si
Silicon
1410 2355 2.329
15
P
Phosphorus
44.1 (white)
410 (red, under pressure) 280 (white) 1.82 (white)
16
S
Sulfur
113 (α)
119 (b)
106.8 (g) 444.67 2.070 (α)
1.957 (b)
17
Cl
Chlorine
-100.98 -33.97 0.003214 (gas, 273K)
18
Ar
Argon
-189.37 -185.86 0.001784 (gas, 273K)
19
K
Potassium
63.65 774 0.862
20
Ca
Calcium
839 1484 1.55
21
Sc
Scandium
1541 2831 2.989
22
Ti
Titanium
1660 3287 4.54
23
V
Vanadium
1887 3377 6.11 (292 K)
24
Cr
Chromium
1857 2672 7.19
25
Mn
Manganese
1244 1962 7.44
26
Fe
Iron
1535 2750 7.874
27
Co
Cobalt
1495 2870 8.90
28
Ni
Nickel
1453 2732 8.902 (298 K)
29
Cu
Copper
1083.4 2567 8.96
30
Zn
Zinc
419.58 907 7.133
31
Ga
Gallium
If an ocean wave passes a stationary point every 5 s and has a velocity of 10 m/s, what is the wavelength of the wave
Answer:
As Per Provided Information
Velocity of wave v is 10m/s
These ocean wave passes a stationary point every 5 s ( It's time period)
First we calculate the frequency of ocean wave .
Using Formulae
[tex] \blue{\boxed{\bf \: \nu = \cfrac{1}{v}}}[/tex]
here
v is the velocity of wave .
[tex]\sf\longrightarrow \nu \: = \cfrac{1}{10} \\ \\ \\ \sf\longrightarrow \nu \: = 0.1Hz[/tex]
Now calculating the wavelength of the wave .
Using Formulae
[tex] \boxed{ \bf \lambda = \cfrac{v}{ \nu}}[/tex]
Substituting the value and we obtain
[tex] \sf \longrightarrow \lambda \: = \cfrac{10}{0.1} \\ \\ \\ \sf \longrightarrow \lambda \: = \cancel\cfrac{10}{0.1} \\ \\ \\ \sf \longrightarrow \lambda \: =100m[/tex]
Therefore,
Wavelength of the wave is 100 metres.When does sound become damaging to the human ear?
Why a surface that always have a perpendicular is an equipotential
A thermoacoustic generator transforms thermal energy into electrical energy. Thermal energy is transferred to a gas by a heat exchanger. The thermal energy causes the gas particles to vibrate rapidly and generate a sound wave. These vibrating gas particles are then used by an alternator to generate electrical energy. The gas used in this kind of generator must be nonreactive to avoid the danger of fire. Using heavier gases increases the amount of electrical energy generated.Which two elements on the table are most likely to be good choices for use as the gas in a thermoacoustic generator?
Answer:
Co2
Explanation:
easy one here pls help thanks so much
What happens to the water vapor in the air when the air temperature cools?
Answer:
it becomes a liquid. it becomes water
What best describes the motion of the medium particles in a longitudinal wave? The medium does not move. The medium moves in all directions. The medium vibrates as it moves in a circular path around the wave. The medium vibrates parallel to the direction of the wave.
In the motion of the medium particles in a longitudinal wave, the medium vibrates parallel to the direction of the wave.
What is a longitudinal wave?A longitudinal wave is a wave that is transversing along the length. When the displacement of medium and travel of wave is the same in that condition wave is known as the longitudinal wave.
It requires some medium to travel. A mechanical and sound wave is an example of a longitudinal wave.
Hence in the motion of the medium particles in a longitudinal wave, the medium vibrates parallel to the direction of the wave.
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Answer:
d the medium vibrates parallel to the direction of the wave.
Explanation:
Calculate the mass (in g) of 346 cm³ of polythene. The density of polythene is 0.95 g/cm³. Give your answer to 2 decimal places.
Answer:
M = 328.70g
Explanation:
From the given values:
V = 346 cm³
M of 1 cm³ of Polythene = 0.95g or 95/100g
Solve:
M = (95×346)
10
= 32870
100
M = 328.70g
Rectangular plate has a voltage of +180V and plate to the first plate) has a 'voltage of -5V. Determie another rectangular plate (parallel to between these two plates? The distance of the field strength at any point separation of the plates is finite, say 8.6mm.
For a Rectangular plate has a voltage of +180V and a 'voltage of -5V. , the second plate has the Electric field mathematically given as
E=21.5*10^3v/m
What is the field strength?Generally, the equation for the Electric field is mathematically given as
E=v/d
Where
v={180-(-5)}v
v=185v
Therefore
E=185/8.6*10^{-3}
E=21.5*10^3v/m
In conclusion, Electric field
E=21.5*10^3v/m
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After a massive-star supernova, what is left behind?.
Answer: A Nebula is left behind. A spectacular explosion in which a star ejects most of its mass in a violently expanding cloud of debris.
Hope this helps!
which thermometer one containing mercury or one containing alcohol, could be used in a polar region where the temperature reaches below -40 degrees?
a girl walks 2 meters north 4 meters west and 2 meters south her final displacement is: