Explanation:
Given parameters:
Frequency = 500Hz
Unknown:
a. Period of rotation
b. Time required to complete 7 rotation
Solution:
The period of rotation is the time taken to complete a turn.
P = [tex]\frac{t}{n}[/tex]
P is the period
t is the time
n is the number of turns
Period is the inverse of frequency;
P = [tex]\frac{1}{500}[/tex] = 0.002s
b.
Time required to complete 7 rotation;
P = [tex]\frac{t}{n}[/tex]
t = P x n
t is the time
P is the period
n is the number of rotations
t = 0.002 x 7 = 0.014s
When magma is cooled, it changes into which of the following?
Answer: You didnt finish the question. But as magma cools it turns to igneous rock.
Which observation supports a model of the nature of light in which light acts as a wave?
A. Constructive interference
B. Temperature change
C. Blackbody radiation
D. Photoelectric effect
Answer:
Explanation:
Hope this helps!
Answer:
a. constructive interference
Explanation:
100% correct
The person with the greatest ___ hits earth first
A. Volume
B. Mass
C. Density
D. Weight
The person with the greatest density will hit the earth first.
What is Density?This is regarded as the mass per unit volume of a substance.
Density = mass/ volume
In objects with different densities, the drag and buoyancy forces will be the
same. They will however have different gravitational force in which the
denser object has more compared to lighter ones.
Read more about Density here https://brainly.com/question/1354972
A man standing on top of a 30 m tall building throws a brick downwards with a velocity of 12 m/s. Determine the speed of the brick just before it hits the ground.
Answer:
27.1m/s
Explanation:
Given parameters:
Height of the building = 30m
Initial velocity = 12m/s
Unknown:
Final velocity = ?
Solution:
We apply one of the kinematics equation to solve this problem:
v² = u² + 2gh
v is the final velocity
u is the initial velocity
g is the acceleration due to gravity
h is the height
v² = 12² + (2 x 9.8 x 30)
v = 27.1m/s
Power is calculated by multiplying voltage by
a. current.
b.
energy.
C. resistance.
d. voltage.
Please select the best answer from the choices provided
B
ОООО
D
Answer:
d
Explanation:
How would you measure the volume of an oddly shaped object
By breaking the object into tiny pieces and placing them in a beaker
By placing it on a triple beam balance
By placing it in a room without gravity
By placing it in water and measuring how high the water rises
Answer:
By placing it in water and measuring how high the water rises
Explanation:
You can place the object in a can filled with water. You'll then see that as it sits there, the water level rises. You would then measure that to find the volume.
A funnel shaped low pressure system that is typically associated with strong thunderstorms is a(n)_______. *
Answer:
Tornadoes
A tornado is a violently rotating column of air that is in contact with both the surface of the Earth and a cumulonimbus cloud or, in rare cases, the base of a cumulus cloudExplanation:
TRUE OR FALSE: some rays of light carry radiation.
Answer:
true
Explanation:
Answer:
True
Explanation:
A family is skating at an ice rink. The 58.2 kg mother is holding the
hand of her 35.5 kg daughter. The father grabs his wife's free hand and pulls horizontally with a constant force of 100. N. Assume that the skates glide without friction on the ice and that the family's hands andarms approximate ideal strings. How much net force does the daughter experience?
Answer:
When I got this question I had to draw it out so if you have to do that, draw 3 stick figures holding hands, one representing the mother, father, and daughter. Then you write their weights on top of them and then draw an arrow pointing from the father to the mother.
Explanation:
use this formula :
[tex]a_{y}[/tex] = [tex]\frac{Fdadshandy}{msys}[/tex]
then you fill it in :
[tex]a_{y}[/tex] = [tex]\frac{100N}{35.5kg+58.2kg}[/tex]
[tex]a_{y}[/tex] = [tex]\frac{100N}{93.7kg}[/tex]
[tex]a_{y}[/tex] = [tex]1.0672[/tex] [tex]m/s^{2}[/tex]
then you multiply that with the daughters weight :
[tex]T_{2} x= m_{2} a_{y}[/tex]
[tex]T_{2} x = 35.5kg (1.0672 m/s^{2})[/tex]
[tex]T_{2} x = 37.89N[/tex]
and that's the answer :) : 37.89N
I need help please
What % of offspring will be green?
Answer:
50%
Explanation:
Gg = 50%
gg = 50%
are these punnet squares?
I need info about galileo galilei. I would love it if you could help. You can just get the points if you want.
What is the acceleration due to gravity near the earth’s surface?
Its value is 9.8 m/s2 on Earth. That is to say, the acceleration of gravity on the surface of the earth at sea level is 9.8 m/s2
thank me and mark me as brainliest
What is the difference between professional and casual communication styles?
Answer:
professional communication style is expected to be formal while the casual is informal.
Explanation:
A boy pulls his toy on a smooth horizontal surface with a rope inclined at 60 degree to the horizontal if the effective force pulling the toy along the horizontal surface is 5 Newton calculate the tension in the rope
Answer:
Tension = 2.5 N
Explanation:
Given:
Angle = 60°
Force f = 5 N
Find:
Tension
Computation:
Tension = fcosθ
Tension = (5)cos60
Tension = (5)(1/2)
Tension = 2.5 N
How are mass and volume alike?
They always stay the same
They are both measured in grams
The cease to exist when placed in a liquid
Answer:
its b
Explanation:
b
An object of mass 2kg raised to a height 10m possess potential energy of 200J. What is the kinetic energy and potential energy at a height 4 metre?
Explanation:
[tex]{\bold{\sf{\underline{Understanding \: the \: concept}}}}[/tex]
✠ This question says that there is an object and its mass is 2 kg ; it's raised to a height 10 m and possess potential energy of 200 J. Now this question ask us to find the kinetic energy and the potential energy at a height 4 metre.
[tex]\bold{↬{ }}[/tex][tex]{\bold{\sf{\underline{Given \: that}}}}[/tex]
✰ Mass = 2 kilograms
✰ Raised height = 10 metres
✰ Posses potential energy = 200 Joules
[tex]\bold{↬{ }}[/tex][tex]{\bold{\sf{\underline{To \: find}}}}[/tex]
✰ Kinetic energy at a height 4 metre
✰ Potential energy at a height 4 metre
[tex]{\bold{\sf{\underline{Solution}}}}[/tex]
✰ Kinetic energy at a height 4 metre = 120 J
✰ Potential energy at a height 4 metre = 80 J
[tex]{\bold{\sf{\underline{Using \: concepts}}}}[/tex]
✰ Potential energy formula.
[tex]{\bold{\sf{\underline{Using \: formula}}}}[/tex]
✰ Potential energy = mgh
[tex]{\bold{\sf{\underline{We \: also \: write \: these \: as}}}}[/tex]
✰ Potential energy as P.E
✰ Mass as m
✰ Joules as J
✰ Height as h
✰ Raised height as g
[tex]{\bold{\sf{\underline{Full \: solution}}}}[/tex]
✠ Let us find the Potential energy.↦ Potential energy = mgh
↦ Potential energy = 2 × 10 × 4
↦ Potential energy = 20 × 4
↦ Potential energy = 80 J
✠ Now according to the question let us find the kinetic energy↦ Kinetic energy = Posses potential energy - Finded potential energy
↦ Kinetic energy = 200 J - 80 J
↦ Kinetic energy = 120 Joules
An object of mass 2kg raised to a height 10m possess potential energy of 200J.
to find:-What is the kinetic energy and potential energy at a height 4 metre?
solution:-from energy conservation,
potential energy at 10m height =potential energy +kinetic energy at 4 m
potential energy at 10 m height=200
let,Kinetic energy at 4m=KE
potential energy at 4m=PE
so,
200=KE+PEpotential energy at 4m height =
mgh2×10×480Hence,
kinetic energy at 4m is =200-80=120J
Which of the following is NOT a benefit of dancing?
1. Improves balance and coordination.
2. Helps boost your mood.
3. Challenges your brain.
4. Isolates you from other people.
Answer:
4
Explanation:
Susan makes the following entry in her notebook: “On Friday we were given a blue liquid in a shallow container. We placed it on the windowsill over the weekend. On Monday morning, there was no liquid left, but the dish had some solid blue stuff in it.”
a. Was the blue liquid in the dish a heterogenous mixture, a solution, or a pure substance? Explain your choice.
b. Write a few sentences about what you think happened in the dish.
Answer:
Explanation:
a. From the information provided in the question, the blue liquid is a solution. This is because a solution is a type of homogeneous mixture (that has an evenly distributed solute in a solvent) which is the reason the liquid was said to be blue (and not immiscible blue solid in a liquid) but after been exposed to heat became just a blue solid. Typically, a solution has a solute and a solvent (combined), the solute here is the blue solid while the solvent is the liquid that made the combination a liquid.
b. Since the dish containing the liquid was placed on a windowsill, it can be assumed that the dish was subjected to heat from the sun which caused the liquid (in the solution) to evaporate after exposure to the heat from the sun (over the weekend) leaving the blue solid solute (of the solution) to remain in the dish. This can be referred to as evaporation to dryness in separation techniques (if the goal was to intentionally separate the solid solute from the liquid solvent).
What is the mass of an object which has a momentum of 560 kg m/s and is traveling at 15 m/s?
Answer:
plane
Explanation:
What will be the average velocity of a body falling in free fall on Earth for 3 s?
Answer:
29.4m/s
Explanation:
Given parameters:
Time = 3s
Unknown:
Average velocity = ?
Solution:
To solve this problem, we use the expression below:
v = u + gt
v is the average velocity
u is the initial velocity = 0m/s
g is the acceleration due to gravity = 9.8m/s²
t is the time
So;
v = 0 + (9.8 x 3) = 29.4m/s
help its science
The average kinetic energy for atoms or molecules in a substance is called __________.
Group of answer choices
temperature
volume
heat
A boxer pushes on a 25 kg heavy bag which is attached to the ceiling until it makes an angle of 36 degrees to the vertical. How much force must the boxer exert on the bag?
Answer:
198.20 N
Explanation:
Given that,
Mass of a heavy bag, m = 25 kg
The bag is attached to the ceiling until it makes an angle of 36 degrees to the vertical.
We need to find the force must the boxer exert on the bag. The force acting on the bag is given by :
[tex]F=mg\cos\theta\\\\=25\times 9.8\times \cos(36)\\\\=198.20\ N[/tex]
So, the required force is 198.20 N.
What current passes through a 1 kW heater with 25 V across it?
Answer:The voltage V in volts (V) is equal to the current I in amps (A) times the resistance R in ohms (Ω): V (V) = I (A) × R (Ω) The power P in watts (W) is equal to the voltage V in volts (V) times the current I in amps (A): P (W) = V (V) × I (A) AC Ohm's law calculator.
Explanation:
40 ampere current passes through a 1 kW heater with 25 Voltage across it.
What is voltage?The difference in electric potential between two places is known as voltage, often referred to as electric pressure, electric tension, or potential difference. It relates to the amount of labor required to transfer a test charge between two places in a static electric field.
Given that power of the source is 1 kW and voltage is 25 V
current is given as,
Power = Voltage*Current
1kW = 25*Current
Current = 1000/25 = 40 ampere.
40 ampere current passes through a 1 kW heater with 25 Voltage across it.
To learn more about voltage refer to the link:
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Can yall help me please?? I can't get it wrong!
Answer:
The answer should be C
Explanation:
HELPPP!! WHAT TWO THINGS WOULD HAVE THE SAME POTENTIAL ENERGY?? PLS HELP
Answer:
The amount of gravitational potential energy an object has depends on its height and mass. The heavier the object and the higher it is above the ground, the more gravitational potential energy it holds. Gravitational potential energy increases as weight and height increases.
Answer:
A rock and a drilled nail
Explanation:
Both objects are not moving potential energy means no movement no energy and both objects never move
An 82 kg man, at rest, drops from a diving board 3.0 m above the surface of the water and comes to rest 0.55 s after reaching the water. What force does the water exert on him?
Answer:
1626.4 N
Explanation:
Given that a 82 kg man, at rest, drops from a diving board 3.0 m above the surface of the water and comes to rest 0.55 s after reaching the water. What force does the water exert on him?
The parameters to be considered are:
Distance S = 3m
Time t = 0.55s
Since the man started from rest, initial velocity u = 0
Using second equation of motion
S = Ut + 1/2at^2
3 = 1/2 × a × 0.55^2
3 = 1/2 × a × 0.3025
a = 3/ 0.15125
a = 19.83 m/s^2
Force = mass × acceleration
Force = 82 × 19.83
Force = 1626.4 N
Therefore, the force that water exerted on him is 1626.4 N
Please Help Me!!!!!!
Answer:
..
Charcoal is flammable.
What will most likely happen ifa light wave moves through a solid?
O It will increase in wavelength.
O It will decrease in speed.
O It will increase in speed.
O It will decrease in wavelength.
how much power is used to move a 25 kg mass 8 meters in 15 seconds?
Answer:
Concept: Physics
Power is related to Work which we will find below[tex]work = f \times d[/tex]Note that force is a vector quantity that has magnitude and direction We have a mass of 25 kg and we want to know the force it exerts by newton's first law: 25 × 9.81 m/s^2 = 245 N Now we have our force and d 245 × 8 meters= 1960 J Power is represented in joules The equation for Power is [tex]p = \frac{w}{t} [/tex]Hence [tex] \frac{1960}{10} [/tex]So we get that P= 196 WAn object completes 10 cycles in 50s.
a. What is the period of its rotation?
b. What is the frequency of its rotation?
Answer:
.
Explanation:
Explanation:
Given parameters:
Number of cycles = 10cycles
Time taken = 50s
Unknown:
Period of its rotation = ?
Frequency of its rotation = ?
Solution:
The period of rotation is the time taken time taken for a body to complete a number of rotation;
Period = [tex]\frac{t}{n}[/tex]
t is the time
n is the number of cycles
Period = [tex]\frac{50}{10}[/tex] = 5s
The period is 5s
Now, frequency is the inverse of period;
F = [tex]\frac{1}{period}[/tex] = [tex]\frac{1}{5}[/tex] = 0.2Hz