Answer:
c
Explanation:
i did the test
A caterpillar crawls 20 feet in 5 minutes. What is the caterpillars crawling speed?
Equation needed:
Two children are riding on a rotating merry-go-round. Child A is at a greater distance from the axis of rotation than child B. Which child has the larger tangential speed?
Answer:
Child A.
Explanation:
For all points on the merry-go-round, the angular speed ω is the same, as it's the rate of change of the angle rotated regarding time, and all points along the same radius rotate at the same time.Based on the definition of angular velocity, and the definition of angle, we find that there exists a fixed relationship between the angular speed and the tangential speed, as follows:[tex]v_{t} = \omega * r (1)[/tex]
So, since ω remains constant, the tangential speed is directly proportional to the distance from the axis of rotation r.This means that it will be larger for the child A, who is at a greater distance from the axis of rotation than child B.At what temperature (degrees Fahrenheit) is the Fahrenheit scale reading equal to (a) 2 times that of the Celsius and (b) 1/4 times that of the Celsius
Answer:
(a) F = 320
(b) = F = -5.1625
Explanation:
The formula that converts degree Celsius (C) to degree Fahrenheit (F) is:
F = 1.8C + 32
Solving (a): F = 2C
Substitute 2C for F in the above equation
F = 1.8C + 32
2C = 1.8C + 32
Collect like terms
2C - 1.8C = 32
0.2C = 32
Multiply both sides by 5
5 * 0.2C = 32 * 5
C = 160
Recall that F = 2C
F = 2 * 160
F = 320
Solving (b): F = ¼C
Substitute ¼C for F in the above formula
F = 1.8C + 32
¼C = 1.8C + 32
Convert fraction to decimal
0.25C = 1.8C + 32
Collect like terms
0.25C - 1.8C = 32
-1.55C = 32
Divide both sides by -1.55
C = 32/(-1.55)
C = -32/1.55
C = -20.65
Recall that: F = ¼C
F = -¼ * 20.65
F = -5.1625
convert 7.6 meters to milemeters
1 m = 1000 mm
So, 7.6 m = 7.6 × 1000 mm = 7600 mm
4. What is the mass of the block
of iron illustrated below?
Ty in advance
What type of relationship exists between mass and distance?
Answer:
Gravitational force
Explanation:
Hope this helps :)
When the strings of a violin are plucked, they vibrate. These vibrations are transferred to
particles in the air. What kind of energy do these vibrating particles have?
o electrical energy
O mechanical energy
O chemical energy
O nuclear energy
Answer:
skalarna wielkość fizyczna charakteryzująca stan układu fizycznego (materii)
jako jego zdolność do wykonania pracy
Which way will the people on the right move? Why? Plz answer
A vector A~ has a negative x component 2.89 units in length and a positive y component 3.17 units in length. The vector A~ can be written in unit vector notation: a1ˆı + a2ˆ. Find the value of (a) a1 (units) (b) a2 (units) (c) What is the magnitude of A~ (units)? (d) What is the direction of A~ (degrees)? 1
Answer:
a1 = -2.89 units
a2 = 3.17 units
magnitude = 4.2896 units
direction = 132.35 degrees
Explanation:
We can write the vector in component form as: <-2.89, 3.17>
That means that its i and j components are:
a1 = -2.89 units
a2 = 3.17 units
The magnitude of the vector is given by:
[tex]\sqrt{(-2.89)^2 +3.17^2} \approx 4.2896[/tex]
The vectors direction can be found from the tangent function, ad noticing that the vector must reside on the Second Quadrant:
[tex]arctan(-3.17/2.89) + 180^o\approx 132.35^o[/tex]
what is the mass of a chair that weights 118 Newton’s
Answer: 6899
Explanation:
The mass of a chair that weighs 118 Newtons is 12.04kg
HOW TO CALCULATE MASS:
The mass of a substance can be calculated by dividing the weight of the substance by its acceleration due to gravity as follows:Mass = weight ÷ accelerationAccording to this question, the mass of a chair weighs 118 Newtons. It can be calculated as follows:Mass = 118N ÷ 9.8m/s²Mass = 12.04kgTherefore, the mass of a chair that weighs 118 Newtons is 12.04kg.Learn more at: https://brainly.com/question/8164654?referrer=searchResults&source=aidnull
What can be said about all atoms in an element
Answer:
All atoms have a dense central core called the atomic nucleus. Forming the nucleus are two kinds of particles: protons, which have a positive electrical charge, and neutrons, which have no charge. All atoms have at least one proton in their core, and the number of protons determines which kind of element an atom is.
Explanation:
Write a paragraph describing Newton's 2nd Law in YOUR OWN WORDS.
Explanation:
if u apply more force to an object, it accelerates at a higher rate
_H₂ + O₂- _ H₂O. how do you balance this equation
Answer:
first balance hydrogen.
Explanation:
2H2+O2---->2H2O
Answer:
2H^2 + 2H^2O
Explanation:
Put a 2 in front of both H's and the H's will be 4 and the O's will be 2. The chemical equation is balanced.
a car travels 15 kilometers in 30 minutes. what is the speed of the car
suppose that you had an ohmmeter and a mystery component that could be either an inductor or a capacitor. How could you use the ohmmeter to determine what the mystery component was
Answer:
To determine the mystery component we will connect the mystery component to a DC voltage source, then I will measure the resistance of the component with the use of Ohmmeter, the value of the resistance of the mystery component will determine what the mystery component is
if the resistance > 1( very high ) then component is a capacitor
if the resistance = 0 then component is an inductor
Explanation:
To determine the mystery component we will connect the mystery component to a DC voltage source, then I will measure the resistance of the component with the use of Ohmmeter, the value of the resistance of the mystery component will determine what the mystery component is
if the resistance > 1( very high ) then component is a capacitor
if the resistance = 0 then component is an inductor
A problem says a car is initially driving 19.4 m/s due north. Which one of these tables includes that information correctly?
Answer: B
Explanation: because x is 19.4 and then the y is m/s north
The intensity of the radiation emitted by the oxygen sensor is directly proportional to the: A. propagation speed of the radiation. B. wavelength of t
Answer:
D.number of photons emitted.
Explanation:
These are the options for the question
A.propagation speed of the radiation.
B.wavelength of the radiation.
C.polarization of photons emitted.
D.number of photons emitted.
.
Electromagnetic energy of any radiation is proportional to the photons present. And we know that intensity is ratio of energy and unit time.
Hence, The intensity of the radiation emitted by the oxygen sensor is directly proportional to the number of photons emitted
The intensity of the radiation emitted by the oxygen sensor is directly proportional to the number of photons emitted. The correct answer is D.
The intensity of radiation refers to the amount of energy carried by the radiation per unit of time and unit of area. In the context of the oxygen sensor, the intensity of the radiation emitted by the sensor is directly proportional to the number of photons emitted.
The more photons emitted, the higher the intensity of the radiation. The intensity is not directly related to the propagation speed, wavelength, or polarization of the photons emitted, but rather the quantity or number of photons being emitted.
Therefore, The intensity of the radiation emitted by the oxygen sensor is directly proportional to the number of photons emitted. The correct answer is D.
To know more about the radiation emitted:
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The complete question is:
The intensity of the radiation emitted by the oxygen sensor is directly proportional to the
A. propagation speed of the radiation.
B. wavelength of the radiation.
C. polarization of photons emitted.
D. number of photons emitted.
In a closed system, change in internal energy is 10 J and heat transferred to it is 10 J what is the work done by the system
Given :
Change in internal energy is, ΔE = 10 J.
Heat transferred to the system is, Q = 10 J.
To Find :
The work done by the system.
Solution :
We know, by 1st law of thermodynamics :
ΔE = W + Q
W = ΔE - Q
W = 10 - 10 J
W = 0 J
Therefore, work done by the system is 0 J.
A 1kg sphere rotates in a circular path of radius 0.2m from rest and it reaches an angular speed of 20rad/sec in 10 second calculate the angular acceleration
Answer:
2 rad/s²
Explanation:
From the question given above, the following data were obtained:
Mass (m) = 1 Kg
Radius (r) = 0.2 m
Angular speed (w) = 20 rad/s
Time (t) = 10 s
Angular acceleration (a) =?
Angular acceleration is defined as:
Angular acceleration (a) =Angular speed (w) / time
a = w/t
With the above formula, we can obtain the angular acceleration of the sphere as follow:
Angular speed (w) = 20 rad/s
Time (t) = 10 s
Angular acceleration (a) =?
a = w/t
a = 20 / 10
a = 2 rad/s²
Thus, the angular acceleration of the sphere is 2 rad/s²
Hanna is fascinated by the development of factories and the history of mass production. Which type of society BEST fits Hanna's interests?
A. hunting and gathering society
B. industrial society
C. agrarian society
D. horticultural society
Answer:
B
Explanation:
Industrial Society
A roller coaster car of mass 90 kg has two people seated in it whose combined mass is 130 kg. If the height of point A from the ground is 80.0 m, determine the potential energy of the car with the people in it at A.
172 kJ
70.6 kJ
17.6 kJ
86.2 kJ
Define each law of motion in
your own words.
In an element's square on the periodic table, the number with the greatest numerical value represents the
number of neutrons.
O number of electrons.
88
atomic nunner.
O atomic mass.
Answer:
0 atomic mass because it widens as the numerical value represents
Answer: ATOMIC MASS
Explanation:
I got it right
A rough surface for infrared waves may be polished for
Answer:
Radio Waves
Explanation:
What are two ways electromagnetic waves are used in a home computer scanner?
A.
An image is produced when a silicon chip releases electrons by the photoelectric effect.
B.
Visible light is reflected off an object and then captured by a charge-coupled device.
C.
X-rays shine on objects, and the rays either pass through or are absorbed by the objects.
D.
Red light shines on a black-and-white object, and light is reflected according to the pattern of black and white.
Two ways electromagnetic waves are used in a home computer scanner are:
An image is produced when a silicon chip releases electrons by the photoelectric effect.Visible light is reflected off an object and then captured by a charge-coupled device.What is electromagnetic wave?In terms of science, electromagnetic radiation (EMR) is made up of electromagnetic (EM) field waves that travel over space while carrying electromagnetic radiant energy. It consists of X-rays, gamma rays, microwaves, infrared, visible light, ultraviolet, and radio waves. These waves are all a component of the electromagnetic spectrum.
Electromagnetic waves, which are synchronised oscillations of the electric and magnetic fields, are the traditional form of electromagnetic radiation. The electromagnetic spectrum is created at various wavelengths depending on the oscillation frequency. Electromagnetic waves move at the speed of light in a vacuum.
Hence, option (A) and (B) are correct.
Learn more about electromagnetic wave here:
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Write down short notes on:
b. Nuclear energy
Answer: Nuclear energy is energy in the nucleus (core) of an atom.
Explanation: Atoms are tiny particles that make up every object in the universe. ... In nuclear fission, atoms are split apart to form smaller atoms, releasing energy. Nuclear power plants use nuclear fission to produce electricity.
The Moon has a mass of 7.36 1022 kg and a radius of 1.74 106 m. (a) What is the acceleration due to gravity on the Moon
Answer:
1.622m/s²
Explanation:
Given the following
mass of 7.36 × 10²² kg
Radius r = 1.74×10^6m
Gravitational constant G = 6.67×10^-11
Acceleration due to gravity us expressed as:
g = GM/r²
Substitute the given values into the formula
g = 6.67×10^-11×7.36 × 10²²/(1.74×10^6)²
g = 49.0912×10¹¹/3.0276×10¹²
g = 16.22×10^{11-12}
g = 16.22×10^-1
g = 1.622m/s²
Hence the acceleration due to gravity on the Moon is 1.622m/s²
what is physical quantity
Answer:
physical quantity is a property of a material or system that can be qualified by measurement
[tex] \huge\mathfrak{ANSWER}[/tex]
the quantities by meals of which we describe the law of physics are known as physical quantities.
in order to measure a physical quantity we as you my certain magnitude of this quantity a standard and call its unit of that quantity to express the measurement of any physical quantity two thing must be mentioned.
the unit in which the quantity is measured.the numerical value which do not the magnitude of that quantity in term of the choosen unit.For Example -:
when we say that the length of a road is 20 m its mean that the unit of length is matter and the length of rod 20 time magnitude of metre.in other number the numerical value of physical quantities inversely proportional to its unit if N1 and N2 be the numerical value of a physical quantity into different unit u1 and u2 then[tex] \bold{ n_1 (u_1) = n_2(u_2)}[/tex]
a car accelerate at 9 m/s squared. Assuming the car starts from rest how far will it travel in 10 seconds
Answer:
450m
Explanation:
[tex]s = ut + \frac{1}{2} a {t}^{2} \\ s = 0 + t + \frac{1}{2} a {t}^{2} \\ \frac{1}{2 } \times 9 \times {10}^{2} = 450m[/tex]
a mechanic uses a hydraulic lift to raise a 1,200 kg car 0.50 m off the ground . how much work does the lift do on the car
Answer:
The work done is 5880 J
Explanation:
Recall the formula for work as force times distance, therefore in this case the force is that oppose to the gravitational force on the car(of magnitude m * g), and the distance is 0.5 meters.
Then:
Work = 1200 * 9.8 * 0.5 J = 5880 J
