Answer:
240N
Explanation:
The formula for force is F=mass×acceleration.
Therefore, Force= 120×2= 240N
if the period wave is 6 seconds what is its frequency
Answer:
.17Hz
Explanation:
The formula for frequency is f= 1/T , where T is the period.
f = 1/6 and 1/6 ≈ .17
Using newtons law How much force is accelerated a 66kg skier 2m/s2
Answer:
SUPONIENDO QUE NO HAY FRICCIÓN
Explanation:
F = 66 kg([tex]2 m/s^{2}[/tex]) = 132 N
When would it be easier for a bear to catch a fish: as the fish swims or as its in the air. Explain with how light travels in the air and water.
Points: 40
Answer:
In the air
Explanation:
light in air flows in a straight direction while in water it curves far away from the object(refraction)thus the bear in the air will catch the fish easily because in water the fish is refracted thus the bear may catch its refracted image thinking it is the fish
A car starts 10 m north of a reference point. It moves at a constant velocity over the next 5 s, reaching a position of 10 m south of the reference point. What is the car's average velocity?
Answer:
v = -4 m / s
Explanation:
The average speed of a body is defined by the distance traveled in a given time interval
v = (x₂ -x₁) / (t₂ -t₁)
in this case the end point is x₂ = -10 m and the start point is x₁ = 10 m, the negative sign is because the point is below the reference that can be considered as zero point
let's calculate
v = (-10 - 10) / 5
v = -20 / 5
v = -4 m / s
A lamp hangs from the ceiling at a height of 2.6 m. The lamp has a mass of 3.8 kg. The screws holding the lamp break, and it falls to the ground. a. How much gravitational potential energy does the lamp have before it falls? b. How much kinetic energy does the lamp have when it reaches the ground? c. How fast is the lamp moving when it hits the ground?
Whoever answers will get the Brainliest.
Answer:
Explanation:
Given height of lamp from the ceiling = 2.6m
mass of the lamp = 3.8kg
acceleration due to gravity = 9.81m/s²
As the body falls to the ground, it falls under the influence of gravity.
Gravitational potential energy = mass*acc due to gravity * height
Gravitational potential energy = 3.8*2.6*9.81
Gravitational potential energy = 96.923 Joules
b) Kinetic energy = 1/2 mv²
m = mass of the body (in kg)
v = velocity of the body (in m/s²)
To get the velocity v, we will use the equation of motion [tex]v^{2} = u^{2}+2gh[/tex]
[tex]v^{2} = 0^{2}+2(9.81)(2.6) \\v^{2} = 51.012\\v =\sqrt{51.012}\\ v = 7.14m/s[/tex]
Since mass = 3.8kg
[tex]K.E = 1/2 * 3.8 *7.14^{2}\\ K.E = 96.86Joules[/tex]
c) To know how fast the lamp is moving when it hits the ground, we will use the formula. When the body hits the ground, the height covered will be 0m. this means that the body is not moving once it hits the ground. It stays in one position. The energy possessed by the body at this point is potential energy. The correct answer is therefore 0 m/s
Andrew drives to his friend's house, which is 60 miles to the east. After visiting, he travels 25 miles to the west to visit his grandparents. What is Andrew's displacement?
Andrew's displacement while visiting his grandparents is 35 miles to the east.
What is displacement?The displacement is the shortest distance travelled by the particle. It is the vector quantity which represents both the magnitude and direction.
Given Andrew drives to his friend's house, which is 60 miles to the east. After visiting, he travels 25 miles to the west to visit his grandparents.
The displacement will be
60 miles to the east - 25 miles to the west = 35 miles to the east
Thus, the Andrew's displacement is 35 miles to the east.
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A couple of ice cubes float in a glass of water. will the water level in the glass change when the ice cubes have melted? explain your answer
Answer:
yes
Explanation:
because once tje the cubes melt they will add water
Answer:
No
Explanation:
The water level remains the same when the ice cube melts. A floating object displaces an amount of water equal to its own weight. Since water expands when it freezes, one ounce of frozen water has a larger volume than one ounce of liquid water.
To compare the hearing capacities of 5 of his friends, Ravi designs a simple experiment. He places a CD player at the end of a long hall containing a CD with 5 well-known songs.
One by one each person hears the same 5 songs he plays softly but at a pre-determined volume.
Each person starts at a distance of 1 metre from the player and moves away from it. The distance at which a person says that he cannot hear the song any more, is noted. Others are not in the room when 1 person is hearing the songs.
Which of these steps may increase the reliability of the results obtained?
A)having each person listen to just 1 song instead of 5
B)allowing all people to stay in the room for the entire experiment
C)having each person start from far and walk towards the C
D )player Dvarying the volume for the different songs being played
Answer:
A) having each person listen to just 1 song instead of 5.
Explanation:
Ravi could accurately use the outcome to compare the hearing capacities of his friends by this experiment if appropriate precautions are observed.
Playing 5 well known songs simultaneously could result to the interference of sounds when each participant moves away from the player. Which could naturally cause the variation in volume of the songs played with respect to the increasing distance.
Therefore, the reliability of the result from this experiment can be increased if each person listen to just 1 song instead of 5 at a predetermined volume. Each participant would be able to focus on hearing a song during the experiment.
The length of a wooden rod is 25.5 cm. What is this length in:
(a) millimetres?
(b) metres?
Answer:
[tex](a)255mm \\ (b)0.255m[/tex]
Explanation:
[tex](a)1cm = 10mm \\ 25.5cm = x[/tex]
Cross multiply
[tex]1x = 25.5 \times 10 \\ x = 255mm[/tex]
[tex](b)100cm = 1m \\ 25.5cm = x[/tex]
cross multiply
[tex]100x = 25.5 \\ \frac{100x}{100} = \frac{25.5}{100} \\ x = 0.255m[/tex]
hope this helps
brainliest appreciated
good luck! have a nice day!
Answer:
A. 255
B. 0.255
Explanation:
10mm = 1cm
100cm = 1m
<a href="https://en.wikiafripedia.org/wiki/Centimetre">Learn more</a>
https://en.wikiafripedia.org/wiki/Centimetre
A highspeed train travel with an average speed of 227km/hr. The train travels for 2 hrs how far does the train travel
Answer:
454 km
Explanation:
A train travels at 227 km per hour ( at average). So to find the distance it travels for 2 hours, you simply multiply the avg speed by time travelled.
What differentiates baseline actives from health enhancing activities?
A. The intensity of the activity
B. The cost of the activity
C. The participant in the activity
D.The frequency of the activity
Pls help waves for physics
Answer:
b) 252 Hz or 260 Hz
c) 0.25 s
Explanation:
b) The frequency of the beats is 4 Hz, and one tuning fork has a frequency of 256 Hz. Therefore, the second tuning fork is either 4 Hz lower or 4 Hz higher.
f = 252 Hz or 260 Hz
c) Period is the inverse of frequency.
T = 1/f
T = 1 / (4 Hz)
T = 0.25 s
We run a distance of 1000 m at a speed of 4.3 m/s. Calculate the time elapsed to cover this distance
Answer:
So if we need to cover 1000 meters. And we go at a speed of 4.3 m/s. That means that every 4.3 meters we cover is 1 second. So we divide both amd get
1000/4.3 = 232.56 is approx the answer. Also the meters cancel out because
m/(m/s) = m*s/m, cancels out giving s as a unit.
Therefore the answer is 232.56 secondsScientists have changed the model of the atom as they have gathered new evidence. One of the atomic models is shown below. Overlapping red and blue balls in the center with a circular fuzzy green cloud outside them. What experimental evidence led to the development of this atomic model from the one before it? A few of the positive particles aimed at a gold foil seemed to bounce back off of the thin metallic foil. Experiments with water vapor showed that elements combine in specific proportions. Equations were used to identify regions around the nucleus where electrons would likely be. Cathode rays were bent in the same way whenever a magnet was brought near them.
Answer: C. Equations were used to identify regions around the nucleus where electrons would likely be.
Equations were used to identify regions around the nucleus where electrons would likely be. This leads to the development of this atomic model from the one before it.
What is atomic model?The scientific idea that matter is made up of tiny units called atoms is known as the "atomic theory." The history of atomic theory can be traced back to an antiquated philosophical movement known as atomism.
According to this theory, if a lump of stuff were divided into ever-tinier fragments, the pieces would eventually reach a size where they could no longer be divided any smaller. These fictitious final particles of nature were known to ancient Greek philosophers as atomos, which is Greek for "uncut."
Scientist John Dalton first observed that chemical substances appeared to combine and decompose into other substances in weight proportions that suggested that each chemical element is ultimately composed of minute, indivisible particles of constant weight in the early 1800s.
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a incident ray parallel to the axis of convex mirror is...?
Answer:
Published ✎ ↪ The image formed from a convex mirror is always upright, diminished and virtual, regardless of where the object is placed. Rays that are parallel to the principal axis reflect in a direction directly away from the focal point, which is halfway between the mirror and the centre of curvature for the mirror.
Explanation:
factorise x^3 - 3x^2 - 9x - 5
Answer:
(x +1), (x -5) and (x +1)
Explanation:
The computation of the factorization is shown below
Data provided in the question
[tex]X^3 - 3x^2 - 9x - 5[/tex]
Based on the above information, the factors are
Now we have to open these equations in order to get the factors which are as follows
[tex]= x^3 + x^2 - 4x^2 - 4x - 5x - 5[/tex]
[tex]= x^2( x + 1) - 4x ( x + 1) - 5(x + 1)[/tex]
[tex]= (x + 1) (x^2 - 4x - 5)[/tex]
[tex]= (x + 1)(x^2 -5x + x - 5)[/tex]
So,
= (x + 1) (x - 5) (x + 1)
Therefore the (x +1), (x -5) and (x +1) are the factors of the mention polynomial give in the question
How to feel force in daily life?
Complete the sentence. According to the law of reflection, the angle of _____ is equal to the angle of reflection.
Answer:
the angle of incidence equals the angle of reflection
According to the law of reflection, the angle of incidence is equal to the angle of reflection.
What is Reflection ?
Reflection is the change of direction of the wave at the interface which separates two media. it get incident on the other media and get return to the same media is called as reflection. Common examples include the reflection of light, sound and water waves.
we can see that in the dark room when we incident light on the mirror, the direction of the light changes at the point of the incidence. in the scientific language we can say that light has reflected from the surface of the mirror. in this case angle of incidence is always equal to angle of reflection. reflection is shown in the figure.
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If It took 40 sec for a
vehicle or weight 40,000
newton to move round 7meltes
What time will it achieve same
reat for anothercircular path
or radius 21 metres given
that
the condition
Condition of the
vehicle remains the same
I can’t understand your question
HELP ASAP!!! 100 points!!!!!!!!!
Indicate what happens to the resonant frequency of a mass-and-spring system which acts as simple harmonic oscillator when the following things are changed:
Only the spring constant,k, of the mass-and-spring system is increased.
Only the mass of the mass-and-spring system is increased.
Only the amplitude of the mass-and-spring system is increased.
Choices: Frequency increases, decreases or stays the same.
Answer:
Shown from explanation.
Explanation:
The resonant frequency is related by the formula;
Fo= 1/2π√(K/M)
Where Fo is resonant frequency
M is mass
K is the spring constant
From the expression above;
When K is increased frequency would increases since frequency is directly proportional to spring constant.
Similarly when the mass is increased the frequency decreases since frequency is inversely proportional to the mass.
Amplitude is a property of a wave and so the frequency stays same.
Answer:
Hi!
So, this is what you need to do.
Fo = 1/2 π √(K/M)
The m = mass (in case you didn't know)
Explanation:
That should help you with your answer :)
When an object is located 32 cm to the left of the lens, the image is formed 17 cm to the right of the lens. What is the focal length of the lens?
Answer: 11.1cm
Explanation:
Object distance (u) = 32cm
Image distance(v) = 17cm
Focal length(f) =?
Lens formular:
1/f = 1/u + 1/v
1/f = 1/32 + 1/17
Taking the L. C. M of 17 and 32
1/f = (17 + 32) / 544
1/f = 49/544
Taking the reciprocal
f = 544/49
f = 11.1 cm
Therefore, Focal length of the lens is 11.1cm
HELP ASAP!
Why is it misleading to include too many significant figures in a laboratory report?
Answer:
The last significant figure is inherently uncertain because of the rounding off. The rounding-off uncertainty is usually half of the last figure's decimal-place value if no other uncertainty is expressed. As a rule of thumb results of measurements and calculations have a limited number of significant figures.
need help with ASAP please
Answer:
first blank is chemical second blank is kinetic energy
if 128 v is required to push 4.00 A of current though a resistor, what is the resistance
Answer:
32.0 Ω
Explanation:
Ohm's law:
V = IR
128 V = (4.00 A) R
R = 32.0 Ω
If 128 volts are required to push 4.00 A of current through a resistor, then the resistance of the resistor is 32 ohms, and Ohm's Law is used to solve for the resistance of the resistor.
What is the calculation of resistance?Ohm's Law is a fundamental law of electricity that relates the three basic electrical quantities of voltage, current, and resistance, and states that the current flowing through a conductor is directly proportional to the voltage applied across it and is calculated below,
Ohm's Law is used to solve for the resistance of the resistor
Ohm's Law: V = IR
(Here, V =the voltage (in volts), I =the current (in amperes), and R =the resistance (in ohms) )
Given , 128 V is required to push 4.00 A of current through the resistor, one can substitute these values into Ohm's Law and R is solved,
R = V/I
R = 128 V / 4.00 A
R = 32 Ω
Hence, if 128 volts are required to push 4.00 A of current through a resistor, then the resistance of the resistor is 32 ohms.
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The unit of temperature is called fundamental unit.
Answer:
It also includes other measurements as well
Tom rides his skateboard 2.4km in 20 mins and Max rides his scooter 3.6km in 30 mins. Who is moving at a faster rate (speed)? Choose the correct formula and show your work. (what you are plugging into the calculator) Use proper units in your answer.
Answer:
The are both moving at the same speed
Explanation:
Given the following :
Tom = 2.4km in 20 minutes
Max = 3.6km in 30 minutes
To calculate the rider moving at a faster spedd, we need to calculate the speed of each rider.
Speed = distance / time
Tom's speed :
Distance = 2.4km = 2.4 × 1000 = 2400meters
Time = 20 minutes = 20 × 60 = 1200 seconds
Speed = (2400 / 1200) = 2 meter per second
Max's speed :
Distance = 3.6km = 3.6 × 1000 = 3600meters
Time = 30 minutes = 30 × 60 = 1800 seconds
Speed = (3600 / 1800) = 2 meter per second
Both Tom and Max are riding at the same speed(rate)
how does bimettalic strip work?
Describe the importance of SI units?
Answer:
I wouldnt say SI unit isnt important but the Metric System certainly is. And Metric System is more closer to SI unit than imperial unit. Amongst many , the most important one is the ease of use. We upgraded the number system to base 10, why hesitate to import the measurement units to base 10.
Explanation:hop this thelps you !!! :0 :)
The________ is a membrane that surrounds a cell Nucleus
Answer:
nuclear envelope
Explanation:
it surrounds the nucleus and all of its contents
A substance in a solid phase (state) of matter has what?
Answer:
COMPACTED MOLECULES
Explanation:
The molecules are compacted in a solid