when you push on a wall and the wall does not move, you are demostrating newtons first law of motion TRUE OR FALSE
What is the kinetic energy of a 72.0-kg sky diver falling at a terminal velocity of 79.0 m/s? show your work. round your answer to the thousands place and include the units with your answer?
Final answer:
The final kinetic energy of the 72.0-kg skydiver falling at a terminal velocity of 79.0 m/s is 226,584 Joules, rounded to the thousands place as 227,000 Joules.
Explanation:
Kinetic energy (KE) can be calculated using the formula KE = 1/2 × mass × velocity^2. In this case, the mass (m) is 72.0 kg and the velocity (v) is 79.0 m/s. Plugging these values into the formula yields KE = 1/2 × 72.0 kg × (79.0 m/s)^2, which calculates to approximately 226,584 Joules. As instructed, rounded to the nearest thousand, the kinetic energy is given as 227,000 Joules, including the units which are crucial for expressing energy. This demonstrates the considerable amount of energy a body can have due to its motion, and emphasizes the importance of accurate calculations when dealing with physical quantities like kinetic energy.
When you drop a stone into a pool water waves spread out from where the stone landed. why answers?
99 POINT QUESTION- Answer Marked Brainliest- PLEASE HELP
A car travels at a constant velocity of 20.0 meters/second for 15 seconds. What is the power of the car if the initial force applied to it was 95 newtons?
A. 6.5 × 10^2 watts
B. 1.3 × 10^3 watts
C. 2.6 × 10^3 watts
D. 1.9 × 10^3 watts
Hello!
I believe the answer is D) 1.9 × 10^3 watts.
I hope it helps!
What kind of thermal energy that flows between objects due to a difference in temperature?
A 1.00 kg object is attached to a horizontal spring. the spring is initially stretched by 0.500 m, and the object is released from rest there. it proceeds to move without friction. the next time the speed of the object is zero is 0.100 s later. what is the maximum speed of the object?
The maximum speed of the object is 15.70 m/s
Given data:
The mass of object attached to horizontal spring is, m = 1.00 kg.
The stretching distance is, x = 0.500 m.
Time interval is, t = 0.100 s.
The linear velocity of spring - mass system is given as,
[tex]v = x \times \omega[/tex]
Here, [tex]\omega[/tex] is an angular speed. Solving as,
[tex]v = x \times (2 \pi f )\\\\v = x \times (\dfrac{2 \pi}{T} )[/tex]
Time period (T) for complete oscillation is, [tex]T = 2t[/tex].
[tex]v = x \times (\dfrac{2 \pi}{ 2 t} )\\v = 0.500 \times (\dfrac{ \pi}{0.100} )\\v =15.70 \;\rm m/s[/tex]
Thus, the maximum speed of the object is 15.70 m/s.
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What can you do with the Freudian tools for analysis? You can decode the manifest content in your dreams. You can scrutinize a person's fears. You can protect latent content. You can figure out the non-projected dream content.
The answer is : you can decode the manifest content in your dreams.
What is the frequency corresponding to a period of 4.31 s? answer in units of hz?
The frequency corresponding to a period of 4.31 seconds is approximately 0.232 Hz, calculated using the formula for frequency and period (f = 1/T).
Explanation:The subject of this query is on the concept of frequency in relation to period, which is a topic studied in Physics. The relationship between frequency (f) and period (T) is given by the equation f = 1/T. In this context, the given period T is 4.31 seconds.
Applying this to the equation results in f = 1/4.31 Hz. Therefore, the frequency corresponding to a period of 4.31 seconds is approximately 0.232 Hz.
The SI unit for both frequency and period are inverse to each other-- with frequency being in Hertz (Hz), defined as oscillations per second, and period being in seconds, defined as the time for one complete cycle of oscillation.
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When light from the Sun strikes the surface of the Earth, this light is absorbed by the ground. The ground, in turn, emits infrared light—which is actually invisible to human eyes—back into the air. What is the effect of this infrared light being released into the air from the ground? A. It makes the air brighter. B. It warms the air. C. It harms the ozone layer. D. It makes the air appear blue.
________ describes the unique sound quality or tone color of a sound.
Which of these is true about a magnetic field?
It has the same magnitude at every point.
It points in the same direction as it would make a compass point.
It has a magnitude at each point but no specific direction.
It has the same direction at every point.
The periodic table lists all the compounds on Earth.
True or False?
Sonar equipment sends sound wastes into deep water and measures what
A 90-g aluminum calorimeter contains 390 g of water at a temperature of 20C. Then a 160 g piece of metal, initially at 305C is added to the calorimeter. The metal, water, and calorimeter reach an equilibrium temperature of 32 C. What is the specific heat capacity of the metal? The specific heat capacity of aluminum is 910 J/kg ∙ K, and of water is 4190J/kg*K.
430 J/kg · K
470 J/kg · K
350 J/kg · K
310 J/kg · K
Answer:
470 J/Kg.K
Explanation:
Let c be the specific heat capacity of metal.
According to the principle of caloriemetry
Heat lost by the hot body = Heat gained by the cold body
Heat lost by the aluminium = Heat gained by metal + calorimeter
mass of Aluminium x specific heat of Aluminium x rise in temperature + mass of water x specific heat of water x rise in temperature = mass of metal x specific heat of metal x fall in temperature
0.09 x 910 x (32 - 20) + 0.390 x 4190 x (32 - 20) = 0.16 x c x (305 - 32)
982.8 + 19609.2 = 43.68 c
c = 471.4 J/Kg.K
c = 470 J/Kg.K (nearly)
Scientists can calculate the distance from the seismograph station to the focus using
a. the difference in arrival times of P and surface waves.
b. the difference in arrival times of P and S waves.
c. the difference in arrival times of S and surface waves.
d. None of the above.
What is the kinetic energy of a 1500 kg object moving at a velocity of 10 m/s?
The kinetic energy of a 1500 kg object moving at a velocity of 10 m/s is 75000 Joules.
Explanation:The kinetic energy of an object can be calculated using the formula KE = 1/2 * mass * velocity^2. Plugging in the given values for the mass (1500 kg) and velocity (10 m/s):
KE = 1/2 * 1500 * (10)^2
Simplifying the equation:
KE = 1/2 * 1500 * 100
KE = 75000 J
Therefore, the kinetic energy of the object is 75000 Joules.
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30 POINTS!
The slope of the Position versus Time Graph represents the object's
A) acceleration
B) displacement
C) position
D) velocity
Answer:
D
Explanation:
VELOCITY!
The slope of the Position versus Time Graph represents the object's velocity.
Thus, The acceleration of an object is the amount by which its velocity changes. Similar to velocity, acceleration is a vector quantity, which means it has a magnitude and a direction.
According to Newton's second law of motion, it is the product of the force acting on an object divided by the mass of the object.
The speed and direction of an object's motion are measured by its velocity. In kinematics, the area of classical mechanics that deals with the motion of bodies, velocity is a fundamental idea.
Thus, The slope of the Position versus Time Graph represents the object's velocity.
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Refraction occurs when light crosses the boundary between one material and another material. what is the primary cause for this refracting of light upon crossing a boundary?
Can the waves crashing against the beach begin without any initiating event
The diagram shows a charge moving into an electric field. The charge will most likely leave the electric field near which letter?
Answer:
Y
Explanation:
next to Y
Which type of mirror has a flat surface?
In a compression or longitudinal wave, the _____________is a point on a medium through which a longitudinal wave is traveling that has the maximum density.
it is a. compression
Which company has experienced censorship in China?
How is refraction different from reflection?
A. Refraction occurs only within the same medium
B. The light travels at the same speed as before it was
C. The angle of refraction is measured from the flat surface rather than from the normal
D. The angle of refraction is not necessarily equal to the angle of incidence
The refraction is different from reflection as: the angle of refraction is not necessarily equal to the angle of incidence.
What is refraction?Refraction is defined as the shift in a wave's direction when it travels from one medium to another.
Although light refraction is one of the most frequently seen phenomena, refraction can also occur with sound and water waves. We can use optical tools like lenses, prisms, and magnifying glasses thanks to refraction. We can focus light on our retina because of the refraction of light, which is another benefit.
What is reflection?Reflection is the phenomenon of light rays returning to the source after striking an obstruction. It resembles the way a ball bounces when we toss it on a hard surface.
Some of the light rays that strike an object are reflected, some of them travel through it, and the remainder are absorbed by the object.
Mirrors are objects that completely reflect all light rays that strike them. Mirrors therefore demonstrate the phenomenon of light reflection.
Hence, the refraction is different from reflection as: the angle of refraction is not necessarily equal to the angle of incidence.
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the overall charge of the nucleus is _____
a. positive
b. negative
c. neutral
Taking into account the constitution of an atom, the correct answer is option a. the charge of the nucleus of the atom is positive.
Constitution of an atomThe smallest component of ordinary matter with the characteristics of a chemical element is an atom, which consists of a nucleus where neutrons and protons meet, and energy levels where electrons are located.
In other words, The protons and neutrons that constitute the atomic nucleus are located in the nucleus of the atom, while the orbitals, or peripheral region, is where the electrons are located.
The neutron is an electrically neutral subatomic particle, while the proton has a positive electrical charge. Electrons have a negative charge, and are attracted to protons through electromagnetic force.
Overall charge of nucleus of an atomIn summary, since in the center of the atom there are protons with a positive charge and neutrons with a neutral charge, the charge of the nucleus of the atom is positive.
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During a collision between a photon and an electron, there is conservation of
A block of mass m = 4.4 kg slides from left to right across a frictionless surface with a speed 9.2 m/s It collides in a perfectly elastic collision with a second block of mass M that is at rest. After the collision, the 4.4-kg block reverses direction, and its new speed is 2.5 m/s What is V, the speed of the second block after the collision?
A)6.4 m/s
B)5.1 m/s
C)5.9 m/s
D)7.2 m/s
Answer:
option (A)
Explanation:
m = 4.4 kg, u = 9.2 m/s, v = - 2.5 m/s
M =
U = 0
V = ?
By use of conservation of momentum
mu + M x 0 = mv + MV
4.4 x 9.2 + 0 = 4.4 x (- 2.5) + M x V
40.48 + 11 = M V
MV = 51.48 ......(1)
By using the conservation of kinetic energy
0.5 x m x u^2 + 0 = 0.5 x m v^2 + 0.5 x M V^2
4.4 x 9.2 x 9.2 = 4.4 x 2.5 x 2.5 + MV^2
372.416 - 27.5 = MV^2
MV^2 = 344.9 ...... (2)
Dividing equation (2) by equation (1)
V = 6.7 m/s
So, the correct option is (A)
Using conservation of momentum and kinetic energy, we calculate that the speed of the second block after the collision is approximately 6.4 m/s. Therefore, the correct answer is A) 6.4 m/s.
Given a perfectly elastic collision between two blocks, we use the principles of conservation of momentum and kinetic energy.
Step-by-Step Solution:
Calculate the initial momentum:Using these steps, we calculate that the speed of the second block after the collision, V, is approximately 6.4 m/s. Therefore, the correct answer is A) 6.4 m/s.
Three asteroids have exactly the same amount of mass. The distance from asteroid A to asteroid B is 300 km, the distance from asteroid B to C is 400 km, and the distance from C to A is 100 km. Between which two asteroids would the gravitational force be the largest?
A). Between asteroid A and B.
B). Between asteroid B and C.
C). Between asteroid C and A.
D). The gravitational force between each pair of asteroids would be the same.
Which half reaction shows both the conservation of mass and the conservation of charge?
wo objects attract each other with a gravitational force of 50 newtons from a given distance. If the distance between the two objects is increased by 5 times, what will be the changed force of attraction between them?
2 newtons
10 newtons
125 newtons
625 newton