Answer:
Mass is how much matter an object contains. Mass and weight are different measurements, although they may seem similar. Mass is measured by comparing one object to another object of known mass. Grams and kilograms are units we use to measure mass.
The measurement of quantity of matter in an object is mass ( optionC)
What is mass of a body?Mass of a body is defined as the quantity of matter(Solid, liquid or gas) contained in the given volume of the body.
Mass is a scalar quantity and also part of the fundamental quantities. It is measured in kilograms. Other units of mass include; gram tonnes e.t.c
Matter is anything that takes up space and can be weighed.
Therefore the quantity of matter in a body is
called mass.
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In the 19th century scientists Knew that light was some kind of wave. and every waye science had yet decided needed
Answer:
The light was the wave
Explanation:
a car travels at a speed of 50 m/s for 13 seconds. what is the distance that the car travels?
Match these items.
1. alpha rays
2. plasma
3. fission
4. beta rays
5. gamma rays
6. radioactive
7. fusion
a. splitting/dividing
b. joining together
c. release of atomic particles
d. high-energy light
e. helium nuclei
f. electrons
g. ions and free electrons
Answer:
Alpha Rays - Helium Nuclei
Gamma Rays - High-Energy Light
Fusion - Joining Together
Radioactive - Release of Atomic Particles
Beta Rays - Electrons
Fission - Splitting/Dividing
Plasma - Ions and Free Electrons
Explanation:
The correct match for the given terms:
1. alpha rays -Helium nuclei
2. plasma - ions and free electrons
3. fission - splitting/dividing
4. beta rays - electrons
5. gamma rays - high-energy light
6. radioactive - release of atomic particles
7. fusion - joining together
What is radioactivity?The nucleus of an atom exhibits the phenomenon of Radioactivity due to its instability. Energy will be lost due to the emission of radiation from the unstable nucleus of an atom.
The electrostatic force of repulsion and the powerful forces of attraction keep the nucleus together. The instability increases as the size of the nucleus increases because the mass of the nucleus increases when concentrated. Therefore, Plutonium, Uranium is extremely unstable and undergoes radioactivity.
The emitted radiation from radioactivity always consists of alpha, beta, and gamma particles. Gamma Decay is photons having high energy, Beta Decay consists of Electrons while Alpha Decay consists of a Helium nucleus.
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When a television is turned on, it converts electrical energy into many other forms of energy. Choose all that correctly lists most of these forms.
Sound
Light
Heat
Electricity
Answer:
sound energy and electricity energy
How can Newton's third law describe the forces affecting a rocket as it
descends to Earth's surface?
A. The rocket pushes through the air with a force equal to that of
Earth's gravity pulling on the rocket.
B. The maximum amount of force the rocket engines can provide
determines how much mass the rocket can lift.
C. The force the rocket exerts on the air is in the direction opposite to
the force that the air exerts on the rocket.
D. The rocket can move downward because the forces acting on it
are unbalanced.
Answer:
C
Explanation:
The force the rocket exerts on the air is in the direction opposite to
the force that the air exerts on the rocket.
Newton's third law describe the forces affecting a rocket as it descends to Earth's surface because: C. The force the rocket exerts on the air is in the direction opposite to the force that the air exerts on the rocket.
Newton's Third Law of Motion states that for every action there exist an equal but opposite reaction.
This ultimately implies that, Newton's Third Law of Motion is a law that is generally based on action-reaction force pairs.
Generally, action-reaction force pairs make it possible for;
Birds to fly.Kicking a ball.Rowing a banca.Cars to move.Objects being in motion.Fishes to swim.Throwing a stone.Rockets descending to Earth's surface.Based on Newton's Third Law of Motion, the force a rocket exerts on the air is in the direction opposite to the force that the air exerts on the rocket.
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A student is able to run 5 meters in a time of 2 seconds. What is the average speed of this student in m/s?
Answer:
2.5
Explanation:
You have to find the unit rate, so 5 divided by 2 is 2.5.
When a body like earth is moving in a circular path the work done in that case is zero because: (a) Centripetal force acts in the direction of motion of the body (b) Centripetal force acts along the radius of circular path (c) Gravitational force acts along the radius of circular path (d) Centrifugal force acts perpendicular to the radius of circular path
Answer:
(b) Centripetal force acts along the radius of circular path
Explanation:
Centripetal force is a force experienced by a body moving in a circular path. It is expressed mathematically ad F = mv²/r
m is the mass of the body
v is the velocity
r is the radius of the circular path
When a body moves in a circular path, work dome is zero because Centripetal force acts along the radius of circular path and the force is at right angle with the motion of body.
In photosynthesis, solar energy undergoes a _______________ when it changes from light energy to chemical energy.
Answer:
chemical change
Explanation:
Determine the average speed of an object that travels 200 miles in 4 hours.
Answer:
The average speed is 50 miles per hour
Explanation:
Speed is equals to distance divided by time
Then substitute your variables into the equation
Hope this helps
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A baseball player practicing popups tosses a ball straight up into the air. If the ball is tossed with an initial velocity of 15.78
m/s, how long does it take
to go up and back down?
(I would appreciate it and if possible put the process of solving it )
you should get atheist 10 to 15 seconds
A spray gun, used to apply paint, uses Bernoulli's principle to function. It contains two tubes inside of it: one tube comes up from the supply of paint and one supplies a flow of compressed air that blows across the top of the paint tube. This rush of air creates ____, which sucks the paint up the tube and into the stream of air.
Answer:
Low pressure
Explanation:
Take two nearby points at the junction of both the tube, let point 1 be in the air tube while point 2 be in the paint tube.
According to Bernoulli's principle, the air at point 1 is moving with some speed which causes the pressure drop inside tube 1, while at point 2 there is no velocity, so there is no pressure drop at that point. In fact, the pressure at point 2 approximately equals the atmospheric pressure.
As both the points are taken is nearby at the junction, to the pressure drop in the flow air pipe causes the suction of fluid from the relatively high-pressure tube (paint tube).
Hence, this rush of air creates low pressure, which sucks the paint up the tube and into the stream of air.
please can i have help with this question
A tennis ball with a speed of 11.5 m/s is moving perpendicular to a wall. After striking the wall, the ball rebounds in the opposite direction with a speed of 5.842 m/s. If the ball is in contact with the wall for 0.0129 s, what is the average acceleration of the ball while it is in contact with the wall? Take "toward the wall" to be the positive direction. Answer in units of m/s 2
Answer:
1344.34 m/s
Explanation:
From the question given above, the following data were obtained:
Initial velocity (u) = 11.5 m/s
Rebound velocity i.e final velocity (v) = 5.842 m/s
Time (t) = 0.0129 s
Acceleration (a) =.?
The acceleration of the ball while it is in contact with the wall can be obtained as follow:
a = (v + u) / t
a = (5.842 + 11.5) / 0.0129
a = 17.342 / 0.0129
a = 1344.34 m/s
Therefore, the average acceleration of the ball while it is in contact with the wall is 1344.34 m/s
Bob rides his bicycle on a bike path that is 1000 meters long to get his house that is due east of the bike path. If Bob take 150 seconds then...
What is his speed?
What is his velocity?
Answer:
6.6 mph is the answer because u had to divide it
Protons are found only in the atomic nucleus.
TRUE
FALSE
Answer:
true
Explanation:
Protons and neutrons are found in the nucleus
The planet's hawks and block their near each other in the door again system the dworkin's have very advanced technology and a dork and scientist want to increase the pull of gravity between the 2 planets which proposals with the scientists make to accomplish this goal check all that aply
Answer: A,B, and E
Explanation: Just checked I got them right:)
..................ok okokok
Answer:
ok
Explanation:
A. 2kg
B. 6kg
C. 8kg
D. 14kg
Answer:
A
Explanation:
We know the force is (16N-12), which is 4N, and we know the acceleration is 2 m/s^2. Meaning, we can solve the formula m = F / a (mass equals force divided by acceleration), and we get 2kg.
1. Which of the following provides a correct answer for a problem that can be solved using the kinematic equations?
A A body starts from rest and accelerates at 8 m/s/s for 3 s. The body's final
position is 32 m.
B A body starts from rest and accelerates at 8 m/s/s for 3 s. The body's final
velocity is 16 m/s
C A body starts from rest and accelerates at 8 m/s/s for 3 s. The body's travels a
distance of 16 m
A body starts from rest and accelerates at 8 m/s/s for 3 s. The body's final
velocity is 24 m/s
E A body starts from rest and accelerates at 8 m/s/s for 3 s. The body's final
position is 30 m.
1 of 14
2
3
5 6 7 8
9
Answer:
12
Explanation:
12
Thermal energy is added to water. Which of the following describes the new state of matter?
A- An exothermic process has caused the phase change.
B- Kinetic energy of particles has decreased.
C- Bonds have been broken that hold particles in place.
D- Particles are attracted to each other and form bonds.
Answer:
Bonds have been broken that held particles in place
Explanation:
Boiling took place with use of thermal energy(heat energy), this will make particles to move faster and apart from each other bcos temperature is increased. Increase in temperature causes increase in kinetic energy
A force of 49N causes a box to move with an acceleration of 7m/s2. Find the mass of the object
Answer:
The answer is 7 kgExplanation:
To find the mass of the object given the force and acceleration we use the formula
[tex]m = \frac{f}{a} \\ [/tex]
where
f is the force
a is the acceleration
m is the mass
From the question
f = 49 N
a = 7 m/s²
We have
[tex]m = \frac{49}{7} \\ [/tex]
We have the final answer as
7 kgHope this helps you
An space probe built on Earth has a mass of 750 kg. Calculate the weight of the space probe on Earth.
Answer:
7357.5N
Explanation:
Weight is the force used to pull a mass of object towards the centre of the Earth. The force is 9.81 N/kg.
so, Weight = mass × 9.81
the weight of the space probe should be: 750 × 9.81 = 7357.5 N
Answer:
7350N
Explanation:
Data
m-750kg
g-9.8
W=mg
=750 x 9.8
=7350N
what is a force that always resists the relative motion of objects or surfaces?
Friction is the resistance to motion of one object moving relative to another. It is not a fundamental force, like gravity or electromagnetism. Instead, scientists believe it is the result of the electromagnetic attraction between charged particles in two touching surfaces.
You throw a ball straight up into the air at a velocity of 15 m/s. You want to know how high above your hand the ball will be at exactly 2.5 sec after you released it. You must SHOW ALL WORK to receive credit!!! Of the 5 motion variables - Vi, Vf, a, ΔX, and T, identify which one you are solving for and the magnitudes and directions of all of the others that are known: Which of the motion equations is best to use to determine the height of the ball? How high is the ball above your hand at 2.5 sec after you throw it?
Answer:
6.875mExplanation:
Given
Velocity = 15m/s
Time = 2.5secs
Required
Distance above your hand the ball will be at exactly 2.5secs
using the equation of motion:
ΔX = ViT + 1/2aT²
ΔX is the distance
Vi is the velocity of the ball in air
a is the acceleration due to gravity
T is the time taken
Since the ball is thrown straight up, a = -g
ΔX = ViT - 1/2gT²
Substitute
ΔX = 15(2.5) - 1/2(9.8)(2.5)²
ΔX = 37.5-30.625
ΔX = 6.875m
Hence the ball will be 6.875m above your hand at 2.5secs after you throw it.
How do you find the distance a object has traveled
Answer: Got this from a web search... Change the answer up a bit
Explanation:
The distance travelled is the path taken by a body to get from an initial point to an end point in a given period of time, at a certain velocity. If the velocity is constant: Distance = time * velocity. d = v*t.
Answer:
I researched and found it to be TIME * VELOCITY ( d= v*t)
Explanation:
When I use * I just mean multiply. So its time 'multiplied by velocity' in order to get 'distance'
Which of the statements below is true?
An object’s weight and mass are equal.
An object’s weight is proportional to its mass.
An object’s weight is inversely proportional to its mass.
An object’s weight is always twice its mass.
Answer:
An object’s weight is proportional to its mass.
Which question could be answered using the scientific method
A.do red or orange flowers attract more butterflies?B.are alien spacecrafts powered by gasoline?C.is the color red better then the cooler green?
Answer:
A is the answer
Explanation:
out of all three answers, this one makes more sense.
When you push a 1.85-kg book resting on a
tabletop, you have to exert a force of 2.10 N to
start the book sliding. Once it is sliding, however,
you can use a force of only 1.01 N to keep the
book moving with constant speed.
What is the coefficient of static friction between the book and the laptop?
What is the coefficient of kinetic friction between the book and the tabletop?
Answer:
Given:
mb=2.05 kgmb=2.05 kg Mass of the book
fs=2.45 Nfs=2.45 N Static friction
fk=1.50 Nfk=1.50 N Kinetic friction
Light is produced by which fundamental force?
strong nuclear
electromagnetic
weak nuclear
gravitational
Answer:
ans: Electromagnetic
Answer:
B on edg.
Explanation:
10 N force is acting on the body of mass 5kg which is at rest. The velocity
gained by the body in 5 seconds is