A constant force is applied to an object, causing the object to accelerate at 10 m/s^2. What will the acceleration be if: a) The force is halved? b) The object's mass is halved? c) The force and the object's mass are both halved?
Answers
F=ma
The force is the product of mass and acceleration
this means that the acceleration is
a=F/m
a) The force is halved?
this means that f will be
a=
So the accelaration will also he halved (it's the original acceleratation divided by 2)
b) The object's mass is halved?
a=
which is the original acceleration times two!! so it will double
c) The force and the object's mass are both halved?
now we have
a=
so they will cancel each other out and the acceleration will stay the same!
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5.0 Points The blue color of the sky is the result ofa. conduction. b. scattering. c. reflection. d. absorption.
Answers
Answer:
Time taken, t = 40 minutes
Explanation:
Given that,
Distance covered, d = 30 km
Speed of the person, v = 0.75 km/min
Time taken by the person is given by :
t = 40 minutes
So, the time taken by the person is 40 minutes. Hence, this is the required solution.
Answers
200 x 2 = 400 watts
Answer:
Explanation:
Power = work/time
Work = force x distance
power = force X distance/time (velocity)
power = 200N x 2m/s
power = 400 joules
B) air mass
C) air density
D) temperature
Answers
A weather station model depicts many weather elements such as wind speed and direction, cloud type, cloud cover, temperature, dew point and others. However, options A, B, and C are not depicted.
d, temperature
its the right answer on the test !! :D
Answers
hope that helps
b)335 hours into seconds.
c)1 day into seconds.
Answers
Explanation:
A) 1 kg = 1000g
2500kg = 2500000g
B 1 hour = 3600 sec
335 hour = 1206000sec
C 1day = 24 hours
1 hour = 3600 sec
24 hours = 86400sec
Answers:
a.2500000grams
B.1206000seconds
c.86400seconds.
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B) The particles have sufficient energy to become an ionized gas and are in the most common state of matter in the universe.
C) The particles are not able to move out of their positions relative to one another, but do have small vibrational movements.
D) The particles are not bound to one another, move quickly, have a low density, and are able to spread apart from one another if unconstrained.
Brad and Matt are working in the lab. They noticed that when they mixed two dilute solutions together, the reaction between them happened very slowly. Which of Matt's suggestions would BEST help to increase the rate of this reaction?
A) increase the concentration of both solutions
B) decrease the concentration of both solutions
C) increase the concentration of one of the solutions
D) decrease the concentration of one of the solutions
Identify the correct order of increasing intermolecular force of attraction for the three most common states of matter.
A) liquid → solid → gas
B) solid → liquid → gas
C) gas → liquid → solid
D) gas → solid → liquid
Answers
C) The particles are not able to move out of their positions relative to one another, but do have small vibrational movements.
In solids, in fact, particles are bound together so they cannot move freely. However, they can move around their fixed position with small vibrational movements, whose intensity depends on the temperature of the substance (the higher the temperature, the more intense the vibrations). For this reason, we say that matter moves also in solid state.
2) The correct answer is
A) increase the concentration of both solutions
In fact, when we increase the concentration of both solutions, we increase the number of particles that react in both solutions; as a result, the speed of the reaction will increase.
3) The correct answer is
C) gas → liquid → solid
In gases, in fact, particles are basically free to move, so the intermolecular forces of attraction are almost negligible. In liquids, particles are still able to move, however the intermolecular forces of attraction are stronger than in gases. Finally, in solids, particles are bound together, so they are not free to move and the intermolecular forces of attraction are very strong.