The mass of the rock is equal to 5 Kg when its weight is 49 N.
What is the weight of the object?The weight of a body can be described as the force acting on the body due to gravity. Weight can be described as a vector parameter if gravity is acting on the object.
The S.I. unit for measurement weight is of force, which S.I. is the newton (N). A body with a mass of 1 kg has a weight of about 9.8 Newton on the surface of the Earth, and about 1/6 as much on the Moon.
The mathematical expression to find the weight of an object is written as follows:
W = mg
Given the weight of the rock, W = 49 N
The acceleration due to gravity on the rock, g = 9.8 m/s²
The mass of the rock on the earth will be equal to:
49 = m × 9.8 m/s²
m = 5 kg
Therefore, the mass of the rock is equal to 5 kg.
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In which labeled portion of the curve would you use the heat of vaporization to calculate the heat absorbed? (image attached inside!)
1, 2, 3, 4, or 5
**not sure :( Thank you!!
What is the average power output of a weight lifter who can lift 260 kg from the floor to a height of 1.60 m in 1.7 seconds?
A horizontal pull A pulls two wagons over a horizontal frictionless floor, the first wagon is 500N, the second is 2000 N. The tension in the light horizontal rope connecting the wagons is.
help explain your answer,
Which are true statements?
Check all that apply.
A. 1 mol is 6.02 × 1023 of something.
B. 6.02 × 1023 g is the weight of 1 mol.
C. The mass of 1 mol is the same as the atomic mass in grams.
D. A mole is the atomic mass.
as an object falls freely toward earth, the object's momentum is
1. decreses
2. inceases
3. remains the same,
The object's momentum remains the same as it descends freely toward the earth.
So, option 3. is correct.
Define momentum.Momentum is a measurable quantity that exists because an object is moving and has mass. The mass multiplied by the velocity equals momentum. If an item is stationary, its velocity is zero, and it has no momentum.
When an object descends toward Earth, it accelerates due to gravity, accumulating speed and momentum until the upward force of air resistance equals the downward force due to the object's weight under gravity, a point known as terminal velocity.
The law of conservation of momentum asserts that the overall momentum of objects that interact does not change in the absence of external forces such as friction.
So,
The object's momentum 3. remains the same as it descends freely toward the earth.
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The answer is 4 but idk how to get it so can somebody please explain how to get it
please help me :)
A Ferris wheel at a carnival has a diameter of 62 feet. Suppose it turns at a rate of 70 revolutions per hour.
(a) Find the angular speed of the wheel in radians per hour.
(b) Find the linear speed of a passenger in feet per minute.
Do not round any intermediate computations, and round your answer to the nearest whole number.,
(a) Angular Speed is 140π radians per hour.
(b) The linear speed of a passenger on the Ferris wheel is approximately 3.249 feet per minute.
To find the angular speed of the Ferris wheel in radians per hour, you can use the following formula:
Angular Speed (ω) = (2π * Number of Revolutions) / Time
(a) Angular Speed in Radians per Hour:
Number of Revolutions = 70 revolutions
Time = 1 hour
ω = (2π * 70) / 1
ω = 140π radians per hour
Now, to find the linear speed of a passenger in feet per minute, you need to consider the circumference of the Ferris wheel.
(b) Circumference of the Ferris Wheel:
The diameter of the Ferris wheel is given as 62 feet, so the radius (r) is half of that, which is 31 feet. The circumference (C) of the wheel is given by:
C = 2πr
C = 2π * 31 feet
C ≈ 194.94 feet
Now, to find the linear speed (v) in feet per minute, you can use the formula:
Linear Speed (v) = (Circumference / Time)
Time in this case is 1 hour, which is equivalent to 60 minutes:
v = 194.94 feet / 60 minutes
v ≈ 3.249 feet per minute
Hence, the linear speed of a passenger on the Ferris wheel is approximately 3.249 feet per minute.
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James rode his bike 0.65 hours and traveled 8.45 km. What was his speed?
Final answer:
James's average speed was calculated by dividing the distance he traveled, 8.45 km, by the time it took, 0.65 hours, resulting in an average speed of 13 km/h.
Explanation:
To find James's speed, you need to divide the total distance he traveled by the total time it took him. In this case, the distance traveled is 8.45 km and the time is 0.65 hours. Use the formula speed = distance/time to calculate the speed.
The calculation would be:
Convert time to the same unit as speed (hours to minutes or kilometers per hour). Here, the time is already in hours.Divide the distance by the time: 8.45 km ÷ 0.65 hours = 13 km/h.So, James's average speed while riding his bike was 13 kilometers per hour (km/h).
The typical speed is the all out distance went by the item in a specific time stretch. The typical speed is a scalar amount. It is addressed by the greatness and doesn't have heading.
If the strength of the magnetic field at A is 10 units, the strength of the magnetic field at B is
A)640 units
B)6.4 units
C)2.5 units
D)1.25 units
Peter and Paul both had a great influence on the early church. True False
Answer:
The answer would be TRUE
Peter and Paul did have a great influence on the early church.
A 10.0 cm object is 5.0 cm from a concave mirror that has a focal length of 12 cm. What is the distance between the image and the mirror?
Cellular phones use _____?
A) radar waves
B) very high-frequency waves
C) very low-frequency waves
D) microwaves
3. D-Microwaves
1. C-electromagnetic spectrum
2. B-radio waves
^^(for those doing the three question physical science test)
1. Show how the alternative definition of power, found in your book, can be derived by substituting the definitions of work and speed into the standard definition of power, P = W / delta t.
2. A real spring does not oscillate forever. Instead, it eventually comes to a stop. Does this violate the Law of Conservation of Energy? Explain why or why not.
Could someone help with these two answers please?
If the air inside a balloon exerts a force of 1.5 N on an area of 0.5 m², what is the pressure inside the balloon?
A. 0.5 N/m²
B. 1.5 N/m²
C. 2.5 N/m²
D. 3 N/m²
As your airplane takes off from an airstrip on the ground and rises 30,000 feet into
the sky, what happens to the air pressure on the outside of the airplane?
A. The air pressure decreases.
B. The air pressure increases.
C. The air pressure stays the same.
D. More information is needed.,
If red and yellow paint are mixed together, which color of light will be reflected?
A. Orange
B. Red
C. White
D. Black
True or false, The golf club is swung in a northernly direction, and that is the direction the ball travels
Final answer:
The statement is false since merely swinging the golf club in a northern direction does not ensure that the ball will travel in that direction due to external influences like wind and gravity, much like an airplane can be blown off course.
Explanation:
The statement "The golf club is swung in a northernly direction, and that is the direction the ball travels" is false. In physics, particularly when discussing vectors and motions, the direction that an object is initially moved by a force (like a golf club hitting a ball) does not necessarily dictate that the object will continue to move in that initial direction. Various other forces and factors can influence the trajectory. For example, merely swinging the club in a northern direction does not account for factors such as wind, slope of the ground, spin of the ball, and gravity, all of which can alter the path of the golf ball.
Consider the analogy provided using an airplane's motion. An airplane heading north can be moved off that northward path by the wind, causing it to drift westward. Similarly, swinging the golf club in one direction does not guarantee the ball will follow that path precisely. Additionally, according to physics, when a magnet breaks, all pieces will indeed still have north and south poles, indicating that the physical direction is not the only factor determining the outcome—in both magnetism and ball trajectory.
This is an area of the Solar System located between the orbits of the Mars and Jupiter. It is occupied by numerous irregularly shaped rocky bodies.
A 33.0 g iron rod, initially at 22.7 ∘c, is submerged into an unknown mass of water at 63.3 ∘c, in an insulated container. the final temperature of the mixture upon reaching thermal equilibrium is 58.5 ∘c. part a what is the mass of the water? express your answer to two significant figures and include the appropriate units.
An object has a kinetic energy of 275 j and a momentum of magnitude 25.0 kg · m/s. find the (a) speed and (b) mass of the object.
Answer: The correct answers are 482.4 m/s and 21.96 kg.
Explanation:
The expression for the kinetic energy in terms of momentum of an object is as follows;
[tex]KE=\frac{p^{2} }{2m}[/tex]
Here, KE is the kinetic energy, p is the momentum and m is the mass of the object.
It is given in the problem that an object has a kinetic energy of 275 j and a momentum of magnitude 25.0 kg · m/s.
Calculate the mass of the object.
[tex]KE=\frac{p^{2} }{2m}[/tex]
Put p=25.0 kg · m/s and KE= 275 J.
[tex]m=\frac{25^{2} }{2(275)}[/tex]
[tex]m=1.14 kg[/tex]
Calculate the speed of the object.
[tex]KE=\frac{1}{2} mv^{2}[/tex]
Put m= 1.14 kg and KE= 275 J.
[tex]v=\sqrt{\frac{2(275)}{1.14} }[/tex]
v=21.96 m/s
Therefore, the speed of the object is 21.96 m/s and the mass of the object is 1.14 kg.
Derek reads a rate of 25 words per min. How long would it take him to read a 225 work article if he read at a constant rate without stopping
Which is not a protection against electrical accidents?
a. fuse
b. conducting wire
c. insulation
d. grounded plug
Work output of a large machine in a factory is 89,000 joules, and it’s input is 102,000 joules. Work output of a similar machine is 92,000 joules, and it’s work input is 104,000 joules. Which machine has a greater efficiency
Answer:
The machine with work input of 104,000Joules and work output of 92,000 has the greater efficiency
Explanation:
Efficiency of a machine is the ratio of work done by a machine(work output) to work put in the machine (work input).
Mathematically,
Efficiency = Work output/Work Input ×100
For the machine with work output of 89,000Joules and work input of 102,000Joules, its efficiency will be;
Efficiency = 89,000/102,000×100
Efficiency = 87.5%
Similarly for the other machine with work output of 92,000Joules and work input of 104,000Joules, its efficiency will be;
Efficiency = 92,000/104,000×100
Efficiency = 88.5%
Comparing the efficiency of both machines, the machine with efficiency of 88.5% has greater efficiency.
An electric generator transforms mechanical energy into electrical energy. This process could be done by which of these?
A) Using wind to spin a magnet around.
B) Connecting a battery to a coil of wire.
C) Turning a wheel that contains electrons.
D) Spinning a coil of wire near a large magnet.
Answer:
D) Spinning a coil of wire near a large magnet.
Explanation:
From Faraday's law of induction, when a conducting coil of wire is placed in changing magnetic flux, an emf is induced which produces current in the coil.
Induced emf is given by:
[tex]e = -\frac{d\phi}{dt}[/tex]
A generator is based on the same principle.
The mechanical energy of rotating coil is converted to electrical energy when current is induced. Thus, the correct option is D) Spinning a coil of wire near a large magnet.
An electric generator converts mechanical energy into electrical energy via electromagnetic induction, which is achieved by spinning a coil of a wire near a large magnet. This process is described accurately in option D of the multiple choice question.
Explanation:An electric generator operates on the principle of electromagnetic induction, which was discovered by Michael Faraday. It involves the conversion of mechanical energy into electrical energy by spinning a magnet within a coil or spinning a coil within a magnetic field. Therefore, the correct answer to which process transforms mechanical energy into electrical energy in an electric generator is D) Spinning a coil of wire near a large magnet.
This process generates an electromotive force (emf) that results in the flow of electric current. The other options mentioned, such as using wind to spin a magnet around (A), connecting a battery to a coil of wire (B), or turning a wheel that contains electrons (C), do not accurately describe the fundamental operation of an electric generator.
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Write the value 299,792,458 m/s in proper scientific notation to 4 significant figures. 2.998 × 108 m/s 2.997 × 108 m/s 2.998 × 106 m/s 2.997 × 106 m/s
In order to effectively radiate a radio signal, an antenna must be at least one-half the wavelength of transmission in length, i.e., minimum antenna height = 1/2(λ). WITY operates at a frequency of 980.0 kHz. What is the minimum height (m) of the antenna that WITY (nostalgia radio) must have?,
The wavelength of the is the distance of corresponding points between the two consecutive waves.
The minimum height (m) of the antenna that WITY (nostalgia radio) must have is 153.06 meters.
What is the wavelength?The wavelength of the is the distance of corresponding points between the two consecutive waves.
It can be given as,
[tex]\lambda=\dfrac{c}{f}[/tex]
Here [tex]c[/tex] is the speed of light and [tex]f[/tex] is the frequency of the wave.
Given information-
The minimum height of the antenna is 1/2(λ).
The frequency on which the radio operates is 980.0 kHz.
As the speed of light is [tex]3\times 10^8\rm m/s[/tex]. Thus, find the value of wavelength using the above formula first,
[tex]\lambda=\dfrac{3\times 10^8\rm}{980\times10^3}\\\lambda=306.122\rm m[/tex]
Suppose the minimum height of the antenna is x meters. As the minimum height of the antenna is 1/2(λ). Thus,
[tex]x=\dfrac{1}{2} \times306.122\\x=153.06[/tex]
Hence, the minimum height (m) of the antenna that WITY (nostalgia radio) must have is 153.06 meters.
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The three classes of rocks are sedimentary, metamorphic, and igneous. How are rocks classified into one of these three groups? A. According to the type of minerals present in the rock B. According to how many times they have been through the rock cycle C. According to the method of their formation D. According to the amount of weathering they have endured Rese
the answer is C. according to the method of their information
When the current is the same through all of the resistors and the batteries of a circuit, you have resistors in __.
A. parallel
B. series
C. both parallel and series
D. series and parallel circuits
When the current is the same through all the resistors and the batteries of a circuit, you have resistors in series. Option B is correct.
In the series circuit, the amount of current flowing through any component in a series circuit is the same and the sum of the individual resistances equals the overall resistance of any series circuit.
The voltage in a series circuit, the supply voltage, is equal to the total of the individual voltage drops.
Components linked in series share a single “electrical route,” and each component receives the same current, which is equal to the network's current.
When the current is the same through all the resistors and the batteries of a circuit, you have resistors in series.
Hence,option B is correct.
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What is ozone? How and where is it formed in the atmosphere?
You have been mining for gold and you have found a nugget and are about to be rich. The density of the gold is 19.3 grams/cubic centimeter or g/cc.
Your sample has a mass of 972 grams and is nearly a perfect cube, each side measuring 3 cm.
Find the the density of your sample (HINT: you must find the volume of the cube first).
After you've done this compare the given density of gold to your calculated value. Is your sample pure gold? EXPLAIN.
What is necessary for a substance to be a conductor of electricity?