h=vot-1/2gt²
h=30 x 3 - 1/2 x 9.8 x 3²
h = 45.9 m
t = 2to
t = 2 x 3 = 6s
A spring that can be assumed to be ideal hangs from a stand, as shown above. The spring constant, k, of an ideal spring is defined as the force per unit length and differs from one spring to another. It can be measured in both a static (motionless) and dynamic (in motion) mode A You wish to determine experimentally the spring constant k of the spring in a static (motionless) situation What additional, commonly available equipment would you need? ü What measurements would you make? m. How would k be determined from these measurements? 1 B. You wish to determine experimentally the spring constant k of the spring in a dynamic (moving) situation. What additional, commonly available equipment would you need? What measurements would you make C. Assume that the spring constant is determined to be 500 N/m A 20 kg mass is attached to the lower end of the spring and released from rest. Determine the frequency of oscillation of the mass
(a) The additional commonly available equipment you would need is stop watch.
(b) The measurement obtained with stop watch is period of oscillation. The period of oscillation can be used to determine angular speed and the angular speed is used to determine the spring constant.
(c) The frequency of oscillation of the mass is 0.8 Hz.
Value of spring constant from experimentThe value of spring constant can be determined experimentally with a mass and stop watch to record the period of oscillation.
How to calculate spring constantk = ω²m
where;
ω is angular speed = 2πf = 2π/Tm is massWith a known mass attached to the spring, the period of the oscillation can be determined using stop watch. The period of the oscillation can be used to determine the frequency and angular speed of the oscillation. The angular speed can be used to determine the spring constant, K.
Frequency of the oscillationω² = K/m
ω² = 500/20
ω² = 25
ω = √25
ω = 5 rad/s
ω = 2πf
f = ω/2π
f = 5/2π
f = 0.8 Hz
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an immersion heater rated 2.0A,240V is used to boil water from temperature 52°c to hundred°c. if the mass of the water is 2.5kg, determine the time taken to boil water
Answer:
1.05 x 103s
Explanation:
The answer to the question is 1.05 x 103s
why a drop of spirit on the hand feels colder than a drop of water at the same temperature
Answer:
This is because spirit has a lower boiling point when compared to water
Explanation:
spirit has a lower boiling point when compared to water which means it has the capacity to pull more heat from your hand and also it can do this very fast. This is why our hand feels colder.
Find the period of oscillation of a pendulum with a length of 0.75 m.
Answer:
1.74 s
Explanation:
[tex]T=2\pi\sqrt\frac{L}{g}=2\pi\sqrt\frac{0.75}{9.81}[/tex]
T = 1.74 s
Use this sentence: A large tray is filled with flour and a fan is turned on so that it blows wind across the top.
Which natural process is this modeling?
(1 point)
physical weathering (i picked this)
chemical weathering
erosion
deposition
Answer: Physical weathering
Explanation:
Kraig pulls on a rope attached to a box with a mass of 500kg to the right at an angle of 40 degrees to the horizontal with a force of 30 N for 150 seconds. The box does not move from its’ original position, determine the work done by Kraig.
Answer:
zero
Explanation:
The box does not move from its’ original position, so the displacement is zero, then the work done is zero.
Describe how to make an electromagnet. Use the following words and phrases:
Power supply, coil of wire, current, iron core
Required items:
battery a coil of wireiron coreElectromagnet can be created by wrapping a coil of wire on top of the iron core and passing an alternating current through it with the help of power supply.
the magnetic field will be constantly changing.Answer:
Explanation:
Unlike permanent magnet, electromagnet require a power supply to work. The power supply drives an electric current through coil of wire wrapped around an iron core.
(6) Two long, straight, parallel wires carry currents that are directed perpendicular to the page as shown in Figure. Find the value and direction of hy in terms of I to have net magnetic field equal zero at the origin.
The point at which the net magnetic field will be zero, the magnetic field due to first wire must be equal and opposite in direction to the magnetic field due to the second wire.
Magnetic field between two the parallel wiresThe magnetic field between two parallel wires is determined as follows;
B = μI/2πd
where;
B is magnetic field strengthI is the current in one wired is the distance between the parallel wires.From the formula above we can conclude that, the point at which the net magnetic field will be zero, the magnetic field due to first wire must be equal and opposite in direction to the magnetic field due to the second wire.
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_________________ usually have larger amplitudes and longer wavelengths.
A. Surface waves
B. Transverse waves
C. Compression waves
D. Longitudinal waves
Answer:
longitudinal wave
i guess
sry if its wrong
A plane took from Chicago to Paris 8 h to finish a journey. If the distance of the journey was 6600 km, at what average speed did the plane travel
Answer:
825 km/hr
Explanation:
To find the average speed, you simply have to divide the distance by the time taken.
Distance travelled = 6600 km
Time Taken: 8 hours
Average speed = 6600 ÷ 8 or 6600/8 = 825 km/hr
Your final answer would be the plane travelled at an average speed of 825 kilometres per hour.
while flying to Tucson, Mr H's plane experiences mild turbulence, causing the coffee to oscillate back and forth in his cup 4 times each second. if the coffee waves have a wavelength of 0.1m, what is their velocity across the surface?
This question involves the concepts of wavelength, frequency, and velocity.
The velocity across the surface is "0.4 m/s".
Wave SpeedThe velocity of the wave can be found using the following formula:
[tex]v=f\lambda[/tex]
where,
v = velocity = ?f = frequency = 4 Hzλ = wavelength = 0.1 mTherefore,
v = (4 Hz)(0.1 m)
v = 0.4 m/s
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When light is incident through the focal point, and then strikes a mirror, ___ the light will reflect parallel to the principal axis the light will reflect back through the focal point the light will not reflect at all
When light is incident through the focal point and allow to strike a mirror, the light will be reflected back parallel to the principal axis.
What is reflection of light?The reflection of light occurs when all the incident light falls back when it hit a plane surface like mirror. In this process the light will be thrown back by the mirror without absorbing it.
Reflection of light when it strikes a mirrorWhen light is incident through the focal point and allow to strike a mirror, the light will be reflected back parallel to the principal axis.
Thus, the incident light will reflect parallel to the principal axis.
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Put these 5 events in the correct order. Formation of Atoms, Time begins, Formation of Galaxies
Formation of subatomic particles, Formation of stars
Answer:
Time begins, Formation of subatomic particles, Formation of Atoms, Formation of stars, Formation of Galaxies
Explanation:
At the beginning right after the big bang time starts then sub-atomic particles forms i.e. protons, neutrons from this atoms form and after that stars and galaxies form.
Statement: Baseball is not a dangerous sport unless either a bat breaks or a player is hit with a ball.
Key: B = A bat breaks.
D = Baseball is a dangerous sport.
P = A player is hit with a ball.
Answer:
P
Explanation:
If the bat break it will get replaced and you will get another bat,but if u get hit with the ball it's dangerous in many ways
N2O is the chemical formula of a covalent compound used in the production of whipping cream. The elements that
make up this compound are nitrogen and oxygen.
What is the name of the second element in the chemical name of this compound?
N₂O: Nitrous oxide
oxygen
6. How much heat is absorbed by a persons hand if 100 grams of liquid water at 100°C is poured on his hand? (Assume the final temperature of the water will be normal body temperature of 37°C)
The heat absorbed by a persons hand is 26,359.2 J.
Heat absorbedThe quantity of heat absorbed by the persons hand is heat gained or transferred from the hot water to cold hand. This is based on the principle of conservation of energy.
The quantity of heat absorbed is calculated as follows;
Q = mcΔθ
where;
Q is the quantity of heat absorbedm is mass of the liquidΔθ is change in temperatureQ = 100 x 4.184 x (100 - 37)
Q = 26,359.2 J
Thus, the heat absorbed by a persons hand is 26,359.2 J.
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a measure has true value of 2.00and the measurement value was found to e 1.95.calculate the precision of the measuring instruments
Answer:
(2 - 1.95 / 2) = .05 / 2 = .025 or 2.5 %
The value found should be within ±2.5%
The precision of the measuring instruments will be 2.5%.
What is precision?It should be noted that precision simply means how close a test result will be when it's repeated.
In this case, the precision of the measuring instruments will be:
= (2 - 1.95)/2.
= 0.05/2
= 2.5%
Therefore, the the precision of the measuring instruments will be 2.5%.
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An object of mass M is at rest at the origin at time t = 0 . At that time, a force F = A(t^2) (where A is a positive constant and F is in newtons when t is in seconds) is applied to the object. After 2 s, the velocity of the object in m/s will be
At that time, a force F = A(t²), after 2 s, the velocity of the object in m/s will be 8 (A/M) m/sec.
What is force?A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.
Let a be acceleration of mass M
By Newton 2nd Las, Force = mass * acceleration
F = A (t²) = M * a
a = A (t²) / M
By kinematics, final velocity = initial velocity + acceleration * time
Mass is at rest at t = 0 so initial velocity
So velocity after 2 s is
= 0 + A (2²) / M * 2
= 8 (A / M) m/sec
At that time, a force F = A (t²), after 2 s, the velocity of the object in m/s will be 8 A/M m/sec.
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The velocity of the object after 2 seconds will be the result of integrating the acceleration in time. The acceleration of the object is the second derivative of position, which is the first derivative of velocity. Therefore, we can calculate the velocity of the object at any time t from the formula:
velocity = integral(acceleration)
The acceleration in this case is the force F divided by the mass M, or A(t^2)/M. Therefore, *the speed of the object after 2 seconds would be:
velocity = integral(A(t^2)/M)= (A/M) * integral(t^2)= (A/M) * (t^3/3) + CWhere C is a constant of integration. Since the object was at rest at time t=0, its velocity will also be zero at that moment. Therefore, we can set C=0 and calculate the velocity of the object after 2 seconds:
velocity = (Y/M) * (2^3/3)= (Y/M) * (8/3)= (8/3) * A/M m/sAfter 2 s, the speed of the object in m/s will be 8 (A/M) m/s.What is radioactivity????
Radioactivity is a nuclear phenomenon. It is the process of spontaneous emission of α (alpha particles) or β (beta particles) and γ (gamma particles ) radiations from the nucleus of atoms during their decay.
Uranium and radium are the two radioactive substances.Explanation:
Hope it helps you!!Answer:
radioactivity is the act of emitting radiation spontaneously. This is done by an atomic nucleus that, for some reason, is unstable; it "wants" to give up some energy in order to shift to a more stable configuration.
Explanation:
Compare the gravitational acceleration on the following objects compared to the Sun using:
g(star)/g(Sun) =(M(star)/M(Sun) )/〖(R(star)/R(Sun) )〗^2
Object M(star)/M(Sun) R(star)/R(Sun) g(star)/g(Sun)
White dwarf
Neutron star
Star Betelgeuse
The gravitational acceleration of White dwarf compared to Sun is 13,675.86.
The gravitational acceleration of Neutron star compared to Sun is 6.79 x 10⁻²⁴.
The gravitational acceleration of Star Betelgeuse compared to Sun is 8.5 x 10¹⁰.
Mass of the planetsMass of sun = 2 x 10³⁰ kg
Mass of white dwarf = 2.765 x 10³⁰ kg
Mass of Neutron star = 5.5 x 10¹² kg
Mass of star Betelgeuse = 2.188 x 10³¹ kg
Radius of the planetsRadius of sun = 696,340 km
Radius of white dwarf = 7000 km
Radius of Neutron star = 11 km
Radius of star Betelgeuse = 617.1 x 10⁶ km
Gravitational acceleration of White dwarf compared to Sun[tex]\frac{g(star)}{g(sun)} = \frac{M(star)}{M(sun)} \times [\frac{R(sun)}{R(star)} ]^2\\\\\frac{g(star)}{g(sun)} = \frac{2.765 \times 10^{30}}{2\times 10^{30}} \times [\frac{696,340,000}{7,000,000} ]^2\\\\\frac{g(star)}{g(sun)} = 13,675.86[/tex]
Gravitational acceleration of Neutron star compared to Sun[tex]\frac{g(star)}{g(sun)} = \frac{M(star)}{M(sun)} \times [\frac{R(sun)}{R(star)} ]^2\\\\\frac{g(star)}{g(sun)} = \frac{5.5 \times 10^{12}}{2\times 10^{30}} \times [\frac{11,000}{7,000,000} ]^2\\\\\frac{g(star)}{g(sun)} = 6.79\times 10^{-24}[/tex]
Gravitational acceleration of Star Betelgeuse compared to Sun[tex]\frac{g(star)}{g(sun)} = \frac{M(star)}{M(sun)} \times [\frac{R(sun)}{R(star)} ]^2\\\\\frac{g(star)}{g(sun)} = \frac{2.188 \times 10^{31}}{2\times 10^{30}} \times [\frac{617.1 \times 10^9}{7,000,000} ]^2\\\\\frac{g(star)}{g(sun)} = 8.5\times 10 ^{10}[/tex]
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An undersea research chamber is spherical with an external diameter of 6.20 m. The mass of the chamber, when occupied, is 60400 kg. It is anchored to the sea bottom by a cable. The density of sea water is 1025 kg/m3. Calculate the following: (express your answers using appropriate mks units.)
(a) the buoyant force on the chamber
(b) the tension in the cable
1) If the red motorcycle and the blue motorcycle have the same speed but the red one has more mass, which one has more momentum? explain
Answer:
The blue motorcycle.
Explanation:
The red one, since it has more mass, meaning it is denser, would drag on less. Less mass equals more momentum, since there is less holding it down.
A ball is dropped off a building and falls past a window that is 2.2m long. If it takes .28s for the ball to cross the window what is the distance from the top of the building to the top of the window?
Consider a proton travelling due west at a velocity of 5×10^5m/s. Assuming that the rth magnetic field has a strength of 5x10^-5Tand is directed due south calculate li) the magnitude of the force on the proton (q= 1.6x10^-9C)
Answer:
Consider a proton travelling due west at a velocity of 5×10^5m/s. Assuming that the rth magnetic field has a strength of 5x10^-5Tand is directed due south calculate li) the magnitude of the force on the proton (q= 1.6x10^-9C)
Explanation:
What do waves transfer? Question 1 options: only matter energy only water only particles
Answer:
they transfer Matter and energy
1. How friction is being applied when you perform the activity in making the T-Shirt design with iron on transfer using crayons and sandpaper?
2. Describe what kind of friction is applied when you rub the crayons with the sandpaper.
(a) The inscriptions made in the design is possible due to friction when carving.
(b) The friction applied when you rub the crayons with the sandpaper is kinetic friction
What is friction?Friction is a force that opposes two surfaces that are in contact. It limits the movement between these two surfaces.
Friction applied in the designThe inscriptions made in the design is possible due to friction when carving.
Friction between the crayon and sandpaperThere are two types of friction, static and kinetic friction. The friction applied when you rub the crayons with the sandpaper is kinetic friction because of there is movement between two surfaces.
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Please answer this question. Thank you and have a fruitful day.
#Up
The upward force is caused by floating equipments attached below in ship to make it float.
#Down
Weight or acceleration due to gravity
F=mg#Right
The drag force or friction from water surface#Left
Force of motor to go ahead
Write a script that depicts an employer meeting expectation and failing meeting expectations
Answer: On Monday, XX/XX, the XXXX you presented in our weekly review were not accurate and I’m worried that this reflected poorly on our team’s credibility. This could negatively impact senior leadership’s confidence in our team’s effectiveness at a time when headcount is already being scrutinized and potentially eliminated. Next time you present XXXX, my expectation is that everything will have been double or triple-checked in advance of the meeting so that all figures are reported accurately.
PLEASE HELP ASAPPP !!!!!!
Answer:
the answer is the answer
Explanation:
if you find the answer you get the answer
Which of the following is correct when convection occurs in the atmosphere?
A
Cool air rises and warm air sinks.
B
Cool air sinks and warm air rises.
C
Cool and warm air sink.
D
Cool and warm air rise.
Answer:
Cool air sinks and warm air rises.
Explanation: