The stone on the celestial body will be 50 N in weight. When the mass of a celestial body equals half of the mass of the earth.
What is the difference between mass and weight?The mass of the body is defined as the amount of matter a body has. It is denoted by m and its unit is kg.
Weight is defined as the amount of force an object exerts on the surface. It is given as the product of mass and the gravitational pull.
Given data:
[tex]\rm m_h = \frac{1}{2} m_E[/tex]
[tex]\rm r_h=\frac{1}{2} r_E[/tex]
[tex]\rm W_E = 100 \ N[/tex]
The weight of the body on earth is found as;
[tex]\rm W_E = m_Eg[/tex]
Substitute all the values:
[tex]\rm W_E = m_Eg \\\\\ 100 \ N = 2 m_hg \\\\ m_hg =50 \ N \\\\ W_h = 50 \ N[/tex]
Hence, the weight of the stone on the heavenly body will be 50 N.
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What would happen if the atmosphere consisted of pure oxygen.
Answer:
Then our fires would become massive.
Explanation:
Hope this helps
How far must a 2.0-cm-diameter piston be pushed down into one cylinder of a hydraulic lift to raise an 9-cm-diameter piston by 30 cm
The distance the 2.0-cm-diameter piston must be pushed down to raise 9 cm diameter is 607.5 cm.
Distance the piston must be pushed down
The distance the piston must be pushed down is calculated as follows;
A₁d₁ = A₂d₂
πr₁²d₁ = πr₂²d₂
r₁²d₁ = r₂²d₂
(1)²(d₁) = (4.5)²30
d₁ = 607.5 cm
Thus, the distance the 2.0-cm-diameter piston must be pushed down to raise 9 cm diameter is 607.5 cm.
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Estimate how long a 2500 W electric kettle would take to boil away 1.5 Kg of water . The specific latent heat of vaporization of water is 4000000 J / Kg .
The time it would take a 2500 W electric kettle to boil away 1.5 Kg of water is 2400 seconds
How to calculate the timeUse the formula:
Power × time = mass × specific heat
Given mass = 1. 5kg
Specific latent heat of vaporization = 4000000 J/ Kg
Power = 2500 W
Substitute the values into the formula
Power × time = mass × specific heat
2500 × time = 1. 5 × 4000000
Make 'time' the subject
time = 1. 5 × 4000000 ÷ 2500 = 6000000 ÷ 2500 = 2400 seconds
Therefore, the time it would take a 2500 W electric kettle to boil away 1.5 Kg of water is 2400 seconds.
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The next closest star to Earth, Proxima Centuri, is 4.25 lightyears away. How far is that in meters?
Answer:
4.0208 x 10^16 meters
Explanation:
speed of light in m/s * # seconds in a year * 4.25 years =
2.99792 x 10^8 * 3600*24*365.25 * 4.25 = 4.0208 x 10^16 m
A boy throws a toy up in the air with an initial velocity of 7.9 m/s at an angle of 37 degrees . what is the maximum height reached by the toy?
The maximum height reached by the toy at the given velocity and angle of projection is determined as 1.15 m.
Maximum height reached by the toyThe maximum height reached by the toy is calculated as follows;
H = u²sin²θ/2g
where;
u is the initial velocityθ is the angle of projectiong is gravityH = (7.9² x (sin37)²)/(2 x 9.8)
H = 1.15 m
Thus, the maximum height reached by the toy at the given velocity and angle of projection is determined as 1.15 m.
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if water completely boils in 7 minutes, how long does it take to evaporate
Answer: 20 minutes
Explanation: omm its 20 minutes
label the diagram Please
The earth tilt about 23 degrees which leads to the formation of seasons on earth.
At what degree the earth tilt?This is tilted at 23 degrees from the vertical. The northern hemisphere is in the winter season.
This is the path as the earth revolves around the sun. It takes 1 year to complete this path.
This is the path as the earth rotates around its.
So we can conclude that the earth tilt about 23 degrees which leads to the formation of seasons on earth.
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A swimmer swims 20 m in 40 s. The swimmer's average speed is
------------- m/s.
Explanation:
Average speed=distance/time
=20/40
=0.5m/s
if line segment g f = 3.2 ft, which is a possible measure of line segment t s? 1.6 ft 3.0 ft 3.2 ft 4.0 ft\
By applying the relationship of side lengths to interior angles in a triangle, a possible measure of line segment TS is 4.0 ft.
The relationship of sides to interior angles in a triangle.In Geometry, the relationship of side lengths to interior angles in a triangle include the following:
The shortest side length is always opposite of the smallest interior angle.The longest side length is always opposite of the largest interior angle.Based on the above theory, we can logically deduce that angle GF < TS or TS > GF because 42° is greater than 56°.
TS > 3.2 ft.
Therefore, a possible measure of line segment TS is 4.0 ft.
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Complete Question:
In the triangles, TR = GE and SR = FE. If Line segment G F = 3.2 ft, which is a possible measure of Line segment TS? 1.6 ft 3.0 ft 3.2 ft 4.0 ft.
Four students measured the acceleration of gravity. the accepted value for
their location is 9.78 m/s2. which student's measurement has the largest
percent error?
The student 4 measurement has the largest percent error. The discrepancy between the calculated value and the correct value is referred to as an "error" in statistics.
What is the error?An error is a mistaken or erroneous action. In some contexts, an error is interchangeable with a mistake.
The complete question is
'Four students measured the acceleration of gravity. The accepted value for their location is 9.78m/s2. Which student’s measurement has the largest percent error?
A. Student 4: 9.61 m/s2
B. Student 3: 9.88 m/s2
C. Student 2: 9.79 m/s2
D. Student 1: 9.78 m/s2"
The percentage error is found as;
[tex]\rm \% error = \frac{a_A-a_E}{a_E} \times 100[/tex]
The percentage error in the gIven four students is obtained by putting the values in the given problem;
Student 1 ;
[tex]\rm \% error = \frac{9.78-9.78}{9.88}\times 100 \\\\\ \% error = 0 \%[/tex]
Student 2 ;
[tex]\rm \% error = \frac{9.78-9..79}{9.79}\times 100 \\\\\ \% error = - 0.10 \%[/tex]
Student 3 ;
[tex]\rm \% error = \frac{9.78-9.88}{9.88}\times 100 \\\\\ \% error = - 1.01 \%[/tex]
Student 4 ;
[tex]\rm \% error = \frac{9.78-9.61}{9.61}\times 100 \\\\\ \% error =1.77\%[/tex]
Student 4 reports the maximum percentage error.
Hence the student 4 measurement has the largest percent error.
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Open the attached file. It shows 2 waves (a blue one and an orange one) that are moving through the same medium at the same time. Your challenge is to DRAW the RESULTANT wave and LABEL the areas of interference with CI, DI and/or points of TDI.
The diagram is labelled to DRAW the RESULTANT wave and LABEL the areas of interference with CI, DI and/or points of TDI.
What is refraction?When a light ray falls on the interface of two medium like air and water, then the portion of light is reflected and another portion of the light is refracted into the water medium. The angle of incidence is equal to the angle of reflection but the angle of incidence is larger then the angle of refraction.
Open the attached file. It shows 2 waves (a blue one and an orange one) that are moving through the same medium at the same time.
Thus, the diagram is labelled.
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A pile of 60 sheet’s of paper is 6mm high. Calculate the average thickness of a sheet of the paper
Answer:
0.1 mm
Explanation:
60 sheets = 6 mm
We want 1 sheet so we divide both sides by 60 :
1 sheet = 6/60 mm
1 sheet = 1/10 mm
1 sheet is 0.1 mm
Hope this helped and brainliest please
Parallel light rays are refracted _______and_____ to a point called as focal point after passing through convex lens.
it is a routine composed of yells and cheers gymnastic skill and dance
Cheer dance is a routine composed of yells and cheers gymnastic skill and dance.
What is cheer dance?Cheer dance or cheerleading is a group activity used to entertain fans at athletic events and inspire louder, more enthusiastic cheering. It combines dancing and acrobatic aspects with shouted phrases.
A never-ending range of diverse stunts, jumps, pyramids, dances, and chants that integrate a variety of different movements can be included in the immensely complex sport of cheerleading. Base, partner, and spotter are the three primary cheerleading roles. These roles are all a part of cheerleading stunts, which pose the greatest risk of harm to participants.
It is a competitive sport and leisure activity made up of a set routine with necessary performance components, much like in gymnastics and dance. Additionally, it hopes to get the crowds to cheer in team sports event.
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Your question is incomplete, but most probably your full question was:
1. It is a routine composed of yells and cheers, gymnastic skills and dance.
A. Contemporary dance
B. Hip-hop dance
C. Street dance
D. Cheer dance
Sian wants to measure the number of seconds that it takes for the contents of a beaker to change from clear to purple. which of these tools should she use for this purpose? an electronic balance a stopwatch a barometer a graduated cylinder
Sian wants to count the number of seconds it takes for a beaker's contents to become purple from clear. She should utilize a stopwatch as her instrument for this job.
What is a stopwatch?Watch that, when turned on and off, measures the amount of time that has passed since a specific time.
Sian wants to measure the number of seconds that it takes for the contents of a beaker to change from clear to purple. Stopwatch is the tool she should utilize for this purpose.
Hence, option B is correct.
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Answer: Sian wants to count the number of seconds it takes for a beaker's contents to become purple from clear. She should utilize a stopwatch as her instrument for this job.
option b
Explanation:
The law of conservation of momentum states that, if left alone, what happens to the total momentum of two interacting objects that make up a system?
Answer:
The momentum of the colliding bodies before and after the collision remains constant.
Explanation:
The momentum is constant.
The chart shows the times and accelerations for three drivers.
A 3-column table with 3 rows. The first column labeled drover has entries Kira, Dustin, Diego. The second column labeled acceleration has entries 5.2 meters per second, 8.3 meters per second, 6.5 meters per second. The third column labeled time has entries 6.9 seconds, 3 seconds, 4.2 seconds.
Which lists them from greatest to lowest change in velocity?
Dustin → Diego → Kira
Dustin → Kira → Diego
Kira → Dustin → Diego
Kira → Diego → Dustin
The lists from greatest to lowest change in velocity.Dustin → Diego → Kira. Option A is correct.
What is acceleration?The rate of change of velocity with respect to time is known as acceleration. According to Newton's second law, the eventual effect of all forces applied to a body is its acceleration.
The acceleration is obtained one by one from the given data as the ratio of the velocity to the time.
For the acceleration of each, you can refer to the excel table attached below.
The velocity changes are listed from largest to least. Dustin and Diego Kira.
Hence, option A is the right answer.
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Answer:
D. Kira → Diego → Dustin
Explanation:
Got 100% on the test. Y'all have a good day! :p
A 5000kva 230/13. 8kv single phase power transformer has a resistance of 0. 38 ohms and reactance of 1. 9 ohms
The reactance of the circuit will be 5.233×10⁻⁴ ohm. Inductive reactance is the product of 2 times π frequency and the coil inductance.
What is reactance?
When alternating electricity passes through pure reactance, it causes a voltage drop that is 90 degrees out of phase with the current.
The letter “X” is used to represent reactance in mathematics, and it is measured in ohms.
The inductive reactance of a coil is calculated using the following formula:
Inductive reactance, or XL, is the product of 2 times p (pi), and the frequency of the ac current in hertz, and the coil inductance in henries.
XL= 2πfL
Where,
f {frequency)
L (Inductance)
The reactance of the circuit is found as;
[tex]\rm R_{new}=0.38[{(\frac{1}{60} )^2][/tex]
[tex]\rm R_{new}=1.055 \times 10^{-4} \ ohm[/tex]
The inductance of the circuit is;
[tex]\rm X_{new}=1.9(\frac{1}{60} )^2\\\\X_{new}= 5.233 \times 10^{-4}\ ohm[/tex]
Hence, the reactance of the circuit will be 5.233×10⁻⁴ ohm.
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An electromagnetic wave has a wavelength of 10 nm. Calculate its frequency and identify to which part of the electromagnetic spectrum the wave belongs.
The frequency of an electromagnetic wave with wavelength of 10nm will be 3 × 10∧7 Hz and would belong to the X-ray or ultraviolet part of the electromagnetic spectrum due to its wavelength
What is frequency?
Frequency is defined as the number of oscillations of a wave per unit time and is measured in hertz(Hz).
It is also inversely proportional to the wavelength.
How to calculate the frequency
The frequency of an electromagnetic wave can be calculated using the formula;
frequency = velocity of light divided by the wavelength
f = v ÷ λ
Note that the velocity of light = 3 × 10 ∧8 m/s
Wavelength = 10nm
Frequency, f = 3 × 10∧8 ÷ 10 = 3 × 10∧7 Hz
Hence, the frequency of an electromagnetic wave with wavelength of 10nm will be 3 × 10∧7 Hz and would belong to the X-ray or ultraviolet part of the electromagnetic spectrum due to its wavelength.
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How fast would you (70kg) need to run in order to have the same momentum as a car (750kg) driving at 5 km/hr?
From the calculations and the data provided, the speed is obtained as 15 m/s
What is momentum?The term momentum refers to the product of mass and velocity. Given that we can now proceed with the answer.
Since;
p = mv
m = 750kg
v = 5 km/hr or 1.4 m/s
p = 750kg * 1.4 m/s
p = 1050 kgm/s
If the mass of the body is 70kg, the speed is
v = p/m
v = 1050 kgm/s/70 Kg
= 15 m/s
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what were two weakness of america government under the articals of confederation did the philadelphia mutiny highlight
The weaknesses of the America government under the articals of confederation in which the Philadelphia mutiny highlighted include:
Inability to regulate commerce.Inability to form a military.What is a Mutiny?This is a rebellious act among group of people in order to oppose a certain authority or government.
The government couldn't give soldiers a good working condition due to lack of funds which led to mutiny.
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If a lever has an input arm of 80 cm and an output arm of 20 cm, what is its ideal mechanical advantage?
Answer:
16
Explanation:
Which quantity is a vector quantity?
A.
displacement
B.
distance
C.
mass
D.
temperature
E.
volume
Answer:
Displacement...
Explanation:
Displacement is a vector quantity as it have both magnitude and direction...
[tex]...[/tex]
a. displacement is the correct answer
Displacement is a vector quantity
EXPLANATIONDisplacement is a vector quantity because it has both magnitude and direction.
Ten minutes after you stop exercising, your heart rate should be (2 points)
equal to your Heart Rate Reserve
in your Target Heart Rate Zone
less than 50 beats per minute
less than 100 beats per minute
Ten minutes after you stop exercising, your heart rate should be equal to your heart rate reserve
What is Heart Rate Reserve?
This is defined as the heart rate the body decreases to after an exercise session has been done.
This however varies according to age of individuals and is calculated by finding the difference between the maximum and resting heart rate.]
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How does gravity relate to potential energy?
Answer:
the potential energy a massive object has in relation to another massive object due to gravity
Answer:
PE uses the acceleration of gravity in its calculation definition
Explanation:
Potential Energy = mass * acceleration of gravity * height
Gravitation always does negative work. question 48 options: true false
The statement indicating that 'Gravitation always does negative work' is FALSE.
What is Gravitation?Gravitation is a fundamental physical force that makes objects attract each other in the Universe.
This force (Gravitation) is required to maintain both constant positions and movement of objects.
In conclusion, the statement indicating that 'Gravitation always does negative work' is FALSE.
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Answer:false
Explanation:
Emmett is lifting a box vertically. Which forces are necessary for calculating the total force?
Fp, Ff, and Fg
Fp and FN
Fp, FN, and Ff
Fp and Fg
The forces necessary for calculating the total force are Fp and Fg. The correct option is d.
What is gravity?The force of attraction felt by a person at the center of a planet or Earth is called as the gravity.
The gravitational force, Fg is the attractive force exerted by the Earth on the object that is equal to the mass of the object times the gravitational acceleration.
Emmett is lifting a box vertically. There are only vertical forces acting on the box.
The vertical force must counteract the weight of the object, is the upward force applied on the object.
Thus, the forces necessary for calculating the total force is Fp - Fg.
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Question 2 of 34
You are adding two vectors pointing in the same direction. How do you find
the magnitude of the resultant vector?
OA. By subtracting the magnitude of the shorter vector from the
magnitude of the longer vector
B. By adding the magnitudes of the two vectors
O C. By subtracting the magnitudes of the two vectors
D. By subtracting the magnitude of the longer vector from the
magnitude of the shorter vector
You can find the magnitude of the resultant vector : (B). By adding the magnitudes of the two vectors
Meaning of Vectors
A vector can be defined as any quantity which possesses magnitude and also has direction.
A Vector quantity is very useful because This type of quantity gives more details to the student or teacher analyzing it.
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A crane does exactly 1800 J of work to lift a steel beam from the ground. The beam is accidentally dropped and falls back to its starting position in 0.9 s. What is the mass of the beam
Answer:
Explanation:
1800x0.9=1620kg
-1 A 4m long wire of cross-sectional area 2.5 X 10 m² has a resistance of 5. The conductivity of the wire is (a) 2.5 X 10' m (b) 4.0 X 10' m (c) 2.5 X 10'' m¹ -1 -1 (d) 4.0 X 10''m'
Answer:
3.2 [tex]10^{-2} ohm^{-1} m^{-1}[/tex]
Explanation:
Resistance=5 ohm
Length=4m
Cross sectional area=2.5 x 10
Conductivity = 1/ resistivity
=[tex]\frac{length}{resistance x cross sectional area}[/tex]
Conductivity=4 /5 x 2.5 x 10
Conductivity=4/125
Conductivity=3.2x[tex]10^{-2}[/tex][tex]ohm^{-1} m^{-1}[/tex]