A wave has a period of 2 seconds and a wavelength of 4 meters. Calculate its frequency and speed.
Note: Recall that the frequency of a wave equals 1/period & the period of a wave equals 1/frequency.
Answer:
frequency = 0.5 /s
speed = 2m/s
Explanation:
frequency = 1/period = 1/2 = 0.5 /s
speed = frequency × wavelength
= 0.5 × 4 = 2m/s
A ball of mass 12 kg is released from a height of 2.5 m
find the gravitational potential energy of the ball at point A
and when it reach the ground.
then deduce the kinetic energy of the ball once it reach the ground
(use g=10 N/kg) * 5
Answer:
300 J
Explanation:
From conservation of energy;
Gravitational potential energy at top = Kinetic Energy at bottom
mgh = ½mv²
We are given;
Mass; m = 12 kg.
Height; h = 2.5 m
g = 10 m/s²
Thus;
mgh = 12 × 2.5 × 10 = 300 J
Since mgh = Kinetic Energy at bottom.
Thus; kinetic energy of the ball once it reach the ground = 300 J
Which organelle captures sunlight and helps in food synthesis?
Chloroplast
Mitochondrion
Nucleus
Ribosome
Answer: Chloroplast
Explanation: Chloroplasts work to convert the Sun's light energy into sugars that cells can use. It's like a solar panel that converts energy from sunlight into electric power.
Someone plz help I’m on a time limit :(
What patterns occur in the Earth-Sun-Moon system that allow us to identify the cause of
eclipses?
Answer:
Earth's rotation and orbit and the Moon's orbit cause observable patterns (Day and night, seasons, phases of the Moon, tides).
Which wave has a greater frequency?
Answer:
The wave diagramed in blue.
Explanation:
The reason for this is because frequency is explained as the number of times something has occurred in a certain period of time.
Here, we are talking about wavelength, so the frequency is the number of times the wave can oscillate in this time length.
Say we make dots on the middle of each downward slope. How long does it take to get to each dot compared to the other diagram? The answer is the one with the least amount of time. The wave diagramed in blue.
Why does the Moon appear red during a lunar eclipse?
1.)Because the sunlight bends as it passes through the Earth's atmosphere
2.)Because the sunlight bends as it passes through the Moon's atmosphere
Answer:
Image result for Why does the Moon appear red during a lunar eclipse?
A lunar eclipse takes place when the sun, Earth and moon line up in space. The moon passes through Earth's shadow. ... Bottom line: The moon can look red during a total lunar eclipse because of sunlight that's filtered and refracted by Earth's atmosphere
TRUE OR FALSE
1. TRUE OR FALSE: The higher the frequency, the closer the waves are together and the LOWER the energy carried by the waves will be.
2. TRUE OR FALSE: The greater the force that produces a wave, the greater the amplitude of the wave and the greater the energy carried by the wave.
3. TRUE OR FALSE: In a transverse wave the higher the wave, the LOWER the amplitude
4. Wavelength is a measure of the distance from the crest on one wave to the crest on the very next wave.
5. TRUE OR FALSE: Speed is a measure of the distance a wave travels in an amount of time
6. TRUE OR FALSE: As a wave enters a different medium, the wave’s speed changes. Waves travel at different speeds in different media
7. TRUE OR FALSE: The highest point of a transverse wave is the crest and the lowest point is called a trough.
Answer:
Explanation:
true true fauls true fauls fauls
1 . The higher the frequency, the closer the waves are together and the LOWER the energy carried by the waves will be. FALSE
2. The greater the force that produces a wave, the greater the amplitude of the wave and the greater the energy carried by the wave. TRUE
3. In a transverse wave the higher the wave, the LOWER the amplitude FALSE
4.Wavelength is a measure of the distance from the crest on one wave to the crest on the very next wave, TRUE
5. Speed is a measure of the distance a wave travels in an amount of time TRUE
6. As a wave enters a different medium, the wave’s speed changes. Waves travel at different speeds in different media TRUE
7. The highest point of a transverse wave is the crest and the lowest point is called a trough. TRUE
What is Wave ?A wave is a disturbance in a medium that carries energy and as well as momentum. Energy can be transferred in the form of wave in the medium. there are two types of wave,
longitudinal wave : in which, vibration of the medium (particle) is parallel to propagation of the wave as shown in the fig.1. Sound wave is a longitudinal wave.
Transverse wave : in which, vibration of the medium (particle) is perpendicular to propagation of the wave as shown in the fig.2. Light wave is a longitudinal wave.
1. E = hυ where υ is a frequency which shows direct relation between Energy E and frequency υ. Hence it is false.
2. True
3. In a transverse wave the higher the crest in the wave, the higher the amplitude. FALSE
4. True
5. True, Speed = Distance÷Time
6. due to change in refractive index, velocity changes TRUE
7.True
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Can someone help me with these questions pls
Why would a person who weighs 100 lbs. on Earth weigh significantly more on Ju-piter?
a. Jupiter has more gravitational force than Earth
b. Jupiter is farther away from the sun
c. Jupiter has no atmosphere
Answer:
Is a
Explanation:
I WILL MARK BRAINLIST PLEASE HELP!
Describe how the motion of the particles within the popcorn changes as thermal energy is transferred. How do they start out? How does that change? What other transformations occur?
Answer:
Generally, when thermal energy is transferred to a material, the motion of its particles speeds up and its temperature increases. There are three methods of thermal energy transfer: conduction, convection, and radiation. ... Convection transfers thermal energy through the movement of fluids or gases in circulation cells.
Explanation:
Answer:
Why do you think transferring energy into or out of a substance can change the molecules’ freedom of movement?
Explanation:
We know that transferring energy can cause a change in molecules' freedom of movement. Another way to say this is that transferring energy into or out of a substance can cause a phase change.
Using a box covered with graph paper allows you to simulate which aspect of a car crash?
Answer:
a computer modeling
Explanation:
An object with a mass of 2.0 kg accelerates 2.0 m/s 2when an unknown force is applied to it. What is the amount of force?
Answer:
4 N
Explanation:
mass = 2 kg
acceleration = 2 m/s^2
Force = mass * acceleration
= 2 *2
= 4 N
2. A large collection of stars, gas, and dust is called a _____?
Definition of Reverse bump
Answer:As the name implies, the Bump and Run Reversal (BARR) is a reversal pattern that forms after excessive speculation drives prices up too far, too fast. Developed by Thomas Bulkowski, the pattern was introduced in the June-97 issue of Technical Analysis of Stocks and Commodities and also included in his book, the Encyclopedia of Chart Patterns.
THIS AIN'T MINE
Answer:
to collide with (something) with a moderately forceful impact; thump.
Explanation:
The velocity of a car increases from 10 km/h to 50 km/h in 5 seconds. What is its acceleration?
Answer:
2.22m/s^2
Explanation:
A 0.225 kg sample of tin initially at 97.5°c is dropped into 0.115 kg of water. the initial temperature of the water is 10.0°c. if the specific heat capacity of tin is 230 j/kg • °c, what is the final equilibrium temperature of the tin-water mixture
Answer:
The final equilibrium temperature of the tin-water mixture is approximately 18.468 °C
Explanation:
The parameters of heat energy transfer from the tin to the water are given as follows;
The mass of the sample of tin, m₁ = 0.225 kg
The initial temperature of the tin, T₁ = 97.5 °C
The mass of the water into which the tin is dropped, m₂ = 0.115 kg
The initial temperature of the water, T₂ = 10.0 °C
The specific heat capacity of tin, c₁ = 230 J/(kg·°C)
The specific heat capacity of water, c₂ = 4,200 J/(kg·°C)
Let 'T' represent the final equilibrium temperature of the tin-water mixture, we have;
The heat lost by the tin, ΔQ[tex]_{tin}[/tex] = The heat gained by the water ΔQ[tex]_{water}[/tex]
∴ ΔQ[tex]_{tin}[/tex] = ΔQ[tex]_{water}[/tex]
Where;
ΔQ[tex]_{tin}[/tex] = m₁·c₁·(T₁ - T)
ΔQ[tex]_{water}[/tex] = m₂·c₂·(T - T₂)
By substitution, we have;
ΔQ[tex]_{tin}[/tex] = 0.225 kg × 230 J/(kg·°C) × (97.5°C - T)
ΔQ[tex]_{water}[/tex] = 0.115 kg × 4,200 J/(kg·°C) × (T - 10.0°C)
From ΔQ[tex]_{tin}[/tex] = ΔQ[tex]_{water}[/tex], we have;
0.225 kg × 230 J/(kg·°C) × (97.5°C - T) = 0.115 kg × 4,200 J/(kg·°C) × (T - 10.0°C)
∴ 5,045.625 J - 51.75 J/°C × T = 483 J/°C × T - 4,830 J
5,045.625 J + 4,830 J = 534.75 J/°C × T
∴ 534.75 J/°C × T = 9,875.625 J
T = 9,875.625 J/(534.75 J/°C) = 18.4677419 °C ≈ 18.468 °C
The final equilibrium temperature of the tin-water mixture, T ≈ 18.468 °C.
calculate the ground pressure of a 90kg gas cylinder the diameter of the cylinder is 1.1 m
Answer:
P = 928.09 Pa
Explanation:
Given that,
Mass of a gas cylinder, m = 90 kg
The diameter of the cylinder, d = 1.1 m
Radius, r = 0.55 m
We need to find the ground pressure. The pressure is equal to force per unit area. So,
[tex]P=\dfrac{F}{A}\\\\P=\dfrac{mg}{\pi r^2}\ (A\ is\ area\ of\ base)\\\\P=\dfrac{90\times 9.8}{\pi \times (0.55)^2}\\\\P=928.09\ Pa[/tex]
So, the ground pressure is 928.09 Pa.
Please help me with this
Answer:
The most correct option for the magnitude of the velocity of the ship relative to the port is;
33 km/h
Explanation:
The given parameters of the cargo ship are;
The speed of the cargo ship = 25 km/h
The direction of the cargo ship, θ₁ = 20° North of East
The speed of the current = 10 km/h
The direction of the current, θ₂ = 15° North of East relative to the port
Therefore the direction of the ship relative to the port, 'θ', is given as the sum of θ₁ and θ₂ as follows;
θ = θ₁ + θ₂ = 20° + 15° = 35°
The component of the velocities relative to the port are given as follows;
The velocity of the ship, v₁ = 25·cos(35°)·i + 25·sin(35°)·j
The velocity of the current , v₂ = 10·cos(15°)·i + 10·sin(15°)·j
The velocity of the ship relative to the port, v = (25·cos(35°) + 10·cos(15°))·i + (25·sin(35°) + 10·sin(15°))·j
∴ v ≈ 30.14·i + 16.93·j
The magnitude of 'v' is [tex]\left | v \right |[/tex] = √(30.14² + 16.93²) ≈ 34.6
Therefore, the magnitude of the velocity of the ship relative to the port, [tex]\left | v \right |[/tex] ≈ 34.6 km/h.
Therefore, the closest correct option for the velocity of the ship relative to the port is 33 km/h
Answer:
The correct option for the magnitude of the velocity of the ship relative to the port is...
(33 km/h)
is solar system a natural system or human-made system
Answer:
Natural
Explanation:
Answer:
It's a Natural System
Explanation:
When the Solar System was formed Human didn't even exist. the planets clashed and a lot of changes happened to create earth and different planets.
Waves are observed passing under a dock. Wave crests are 8.0 meters apart. The time for a complete wave to pass by is 4.0 seconds. The markings on the post submerged in water indicate that the water level fluctuates from a trough at 6.0 meters to a crest at 9.0 meters. Calculate the velocity of the wave.
Answer:
2 m/s
Explanation:
The crest of the wave moves 8 meters in 4 seconds, so its speed is ...
(8 m)/(4 s) = 2 m/s
Answer:
2 m/s is the answer .
Explanation:
#CarryOnLearning5.0 kg, with a bullet of mass 0.1 kg. The target was mounted on
low-friction wheels and as the bullet struck the target, the target with
bullet embedded bullet sped off with a velocity of 6.0 ms.
Calculate the velocity of the bullet just before it hit the stationary
target.
Answer:
306 m/s
Explanation:
Law of conservation of momentum
m1v1 + m2v2 = (m1+m2)vf
m1 is the bullet's mass so it is 0.1 kg
v1 is what we're trying to solve
m2 is the target's mass so it is 5.0 kg
v2 is the targets velocity, and since it was stationary, its velocity is zero
vf is the velocity after the target is struck by the bullet, so it is 6.0 m/s
plugging in, we get
(0.1 kg)(v1) + (5.0 kg)(0 m/s) = (0.1 kg + 5.0 kg)(6.0 m/s)
(0.1)(v1) + 0 = 30.6
(0.1)(v1) = 30.6
v1 = 306 m/s
The initial velocity of the bullet can be determined from the total momentum of the system. The velocity of the bullet was 306 m/s.
What is momentum ?Momentum of a body is the product of its mass and velocity. For a collision, the momentum before and after collision will be the same for the colliding system.
Let m1 and m2 be the masses and u be the initial velocity and v is the final velocity.
then, m1 u1 + m2 u2 = m1 v1 + m2 v2.
Given m1 = 5 kg
m2 = 0.1 kg
The velocity of the combined mass v = 6 m/s.
The momentum of the target is zero since it was stationary.
(0.1 × u1) = (0.1 + 5)6 m/s
(0.1 × u1) = 30.6 m/s
then u1 = 30.6/0.1 = 306 m/s
Therefore, the velocity of the bullet before hitting was 306 m/s.
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+
1. Energy due to motion is
_______ energy
Answer:
Kinetic energy
Explanation:
The energy associated with an object's motion is called kinetic energy. A speeding bullet, a walking person, and electromagnetic radiation like light all have kinetic energy.
Kinetic energy. For example, a walking person.
All forces acting upon a body are equal in magnitude
and opposite in direction. The object is initially
motionless and will remain motionless.
What is this condition called?
Answer:
Explanation:
It's called static equilibrium. The object is motionless and every force equals/cancels each other out
Is the potential energy on the surface of Earth zero?If not,what will be it's value?
Answer:
Potential energy does not have an absolute measurement. It is always relative to some reference point. Gravitational potential always increases when you go up and decreases when you go down. But the choice of a zero point is arbitrary.
If you’re dropping objects onto the ground, then choosing the ground as a zero point makes the calculations easier. But you could just as easily make the zero point the top of Mt. Everest, and all the answers would turn out the same. Up still means more energy and down means less, but now the PE of an object at sea level would have a negative sign, but not as negative as an object ten meters above sea level.
So everything would still work fine.
In fact, planetary astronomers take this idea to extremes. Instead of the top of Mt. Everest, they set the zero point for potential energy as infinitely high—so far “up” that gravity is so weak that going “up” another kilometer doesn’t gain you any energy. Then the value for potential energy everywhere else in the universe anywhere near a planet has a negative sign, but just as before, all the answers in relative terms turn out fine.
Explanation:
PLEASE MARK ME AS BRAINLIEST
9. In a closed circuit made of a battery, a wire, a lightbulb, and a switch which part's main responsibility is allowing electricity to flow over a distance?
A: battery
B: light bulb
C: switch
D: wire
Answer:
d
Explanation:
Answer:
D: wire
Explanation:
A sledgehammer is an example of what kind of simple machine?
A. Wheel and axle
o
B. Screw
c
C. Wedge
D. Lever
SUS
I am 95 percent sure the answer in C
Answer: C
Explanation:
Could somebody pls help me out with this?
1) You serve a Volleyball with a mass of 1.6kg. the ball leaves your hand with a speed of 25m/s. the ball has________energy. Calculate it.
2) Askateboard is sitting at the top of a hill that is 26m high. the skateboard weighs 2 N. the skateboard has _____energy. Calculate it.
Temperature and Thermal Energy
Quiz
Active
2
6
7
8
10
TIME REMAINING
47:44
What happens when the thermal energy of a substance increases?
The motion of the particles in the substance increases, and the temperature of the substance decreases.
The motion of the particles in the substance decreases, and the temperature of the substance increases.
O Both the motion of the particles in the substance and the temperature of the substance decrease.
Both the motion of the particles in the substance and the temperature of the substance increase.
Answer:
the temperature increas
Which statement is true of an electromagnetic wave?
A. The wave needs particles in matter as a medium.
B. The wave travels through electric and magnetic fields.
C. The wave is caused by vibrating particles of matter.
D. The wave carries mechanical energy.
Answer:
C
Explanation:
Electromagnetic waves are produced by the vibration of charged particles.
The true statement of an electromagnetic wave is option c. The wave is caused by vibrating particles of matter.
What is an electromagnetic wave?It is the wave that should be developed that leads to the vibration that lies between the electric field and a magnetic field.
Here EM waves should be composed for oscillating magnetic and electric fields.
Hence, the option c is correct.
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A rock has 750 J of potential energy as it sits on a ledge. If the rock were pushed off the ledge, how much would it have just before it hit the ground?
Answer:
the 750 j will have potential energy is 375
Explanation:
750/2 is 375
