Answer:
The correct option is;
The acceleration remains constant
Explanation:
The acceleration is due to the force of gravitational attraction between the text book and the Earth
According to Newton's law of gravitation, there is an attractive force between all objects given by the following relation;
F = G×M₁×m₂/r²
Where;
G, M₁, m₂, and r are constant such that we have;
G×M₁/r² = Constant = The acceleraton due to gravity, g
F = g×m₂
So the acceleration of the textbook as it is being attracted by the force of gravity towards the ground (Earth) is remains constant.
Why echo sound cannot be heard in small room
20=5 (x-10) solve for x.
Answer:
If 20 = 5 (x-10)
so 20= 5x-50
20+50= 5x
70=5x
x=70/5
so x=14
hope it's helpful for youPedro walks 6,500 ft daily to go to school, how many km is it equivalent to?
Answer:
This is equal to 1.9 kilometers.
Explanation:
For every foot it is 0.0003048 so multiply this number by 6500 and get your answer. Hope this helps have a good day
215 = 25x – 35, solve for x.
Answer:
x = 10
Explanation:
215 = 25x – 35
215 + 35 = 25x
250 = 25x
x = 250 / 25
x = 10
A cross country skier moves from location A to location B to location C to location D. Each leg of the back and forth motion takes 1 minute to complete; the total time is 3 minutes.
What is the distance travelled by the skier in the first minute?
What is the displacement of the skier in the first minute?
What is the distance travelled by the skier in the first two minutes?
Please help it’ll be greatly appreciated!!
Answer:
1. 160
2. 0
3. 120
Explanation:
Which of the following is NOT a unit of measurement in the metric system?
1.meter
2.second
3.centimeter
4.foot
Answer:
Your answer should be d: Foot
Explanation:
The unit "foot" is part of the english system which includes inches, feet, yards, etc.
light travels 3,00,000km/s. ls it right velocity or speed?
Answer:
speed
Explanation:
because speed is fast
Answer: Speed
Explanation:
15 POINTS! ANSWER CORRECTLY FOR BRAINLIEST!
Which factor makes the mesosphere difficult to study?
A. It is too high for weather balloons
B. It is too high for satellites to observe
C. Cloud cover makes it too hard to see
D. The ozone layer blocks our view
(I honestly think it's A but I just want other peoples opinions)
Credit: Larus (Full Credits to Larus I didn't make this answer)
The correct answer is that it is too high for the weather balloons.
The mesosphere refers to the layer of the atmosphere of the Earth. It is present directly above the stratosphere and below the thermosphere. It elongates from about 50 to 85 kilometers above the Earth. The coldest temperatures in the atmosphere of the Earth, that is, around -90 degree C, is found close to the top of the layer.
It is tough to study mesosphere, therefore, less is known about the layer of the atmosphere in comparison to the other layers. It is tough as weather balloons cannot fly high enough to reach the mesosphere. The satellites orbit above the mesosphere, and cannot directly determine the traits of the layer.
What is the independent variable?
Answer:
a variable (often denoted by x ) whose variation does not depend on that of another.
How long is a football field?
Answer:
91.44 meters or 300 feet
Answer:
100 yards
Explanation:
If comparing from actual playing field between the goal posts. Add another 10 yards for end lines. Making it 120 yards in length.
In a vacuum , which has a greater acceleration while in free fall: a 7kg bowling ball or a 0.007 kg feather?
a) It depends on the air resistance
b) they will have the same acceleration
c) the feather
d) the bowling ball
Answer:
b) They will have the same accelerationExplanation:
The acceleration of an object in free fall is known as the acceleration due to gravity, g, which is due to the attractive force of the Earth's gravitational field on the object. and is given by the following formula;
[tex]g = G \times \dfrac{Mass \ of \ the \ Earth}{(Distance \ between \ the \ object \ and \ the \ center \ of \ the \ Earth)^2}[/tex]
[tex]g = G \times \dfrac{M}{r^2}[/tex]
r = R + h
Where;
R = The radius of the Earth
h = The height of the center of the object above Earth's surface
Therefore, due to the large magnitude of R, and the comparatively small magnitude of h, R + h is approximately R, that is R + h ≈ R and R ≈ r, which gives;
[tex]g = G \times \dfrac{M}{R^2}[/tex]
Therefore, given that, the mass of the Earth, M, the radius of the Earth, R and the gravitational constant, G, are all constant, the value of g is therefore, constant for all objects and the value is approximately 9.81 m/s².
When a substance experiences a phase change (state of matter change) is this a chemical or physical change? How do you know?
Answer:its a physical change as state of matter changes without any reactions
Explanation:when a chemical reaction, there is a change in the composition of the substances in question; in a physical change there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition. Although we call them physical "reactions," no reaction is actually occurring
help pleaseeee my brainnn stopped working once again lol
Answer:
1c 2a 3b
Explanation:
Which of the following elements would be predicted to be the best conductor of electricity? - sodium (Na) - germanium (Ge) - sulfur (S) - neon (Ne)
Answer:
sodium
Explanation:
Answer:
sodium
Explanation:
When 2 protons, which are positively charges particles, come in contact they typically ______ one another.
A. Attract
B. Bond With
C. Destroy
D. Repel
1. If you move 4 meters north and move 2 meters south what is the distance and the displacement?
2. If you move 2 meters east and move 4 meters west what is the distance and the displacement?
Please help!!It’ll be greatly appreciated
Answer:
distance will be 6diplacement will be 2
2. distance will be 6
displacement will be 2
The distance if we move 4 meters north and 4 meters south is 6 meters whereas, the displacement is 2 m. The same for the movement of 2 meters east and 4 meters west.
What is distance ?Distance is a physical quantity that measures how far we travelled from rest. It is the total length of the ways we moved. Distance is a scalar quantity. Displacement is a vector quantity showing the distance magnitude as well the direction.
If a person moves equal distances in opposite directions, then the displacement will cancel each other as in the case of force and the net displacement is zero.
Here, if move 4 m north and 2 meters south, the total distance is their sum , i.e., 6 meters. But the displacement for the opposite directions cancel in magnitude and the net displacement is 4-2 = 2 meters.
The same is applied for east and west movement. Hence, the distance is 6 m and displacement is 2 m.
Find more on displacement:
https://brainly.com/question/11934397
#SPJ5
what type of resource is water
Answer: Renewable Resource
Explanation: There isn't a limited supply of water, which makes it a renewable resource.
Answer:
in my view water is the combination of oxygen (1) part and hydrogen (2) part
An airplane accelerates down a runway at 3.0 m/s/s for 10 s until it finally lifts off the ground.
Determine the velocity at take-off.
Answer:
30 m/s
Explanation:
Given:
v₀ = 0 m/s
a = 3.0 m/s²
t = 10 s
Find: v
v = at + v₀
v = (3.0 m/s²) (10 s) + 0 m/s
v = 30 m/s
The baseball weighs 1 kg. The pitcher throws the ball at a velocity of 10 m/s straight up. Neglecting air resistance, what is the net force that acts on the baseball when it is HALF WAY to the top of the path
Answer:
9.81 N
Explanation:
Given that a baseball weighs 1 kg. The pitcher throws the ball at a velocity of 10 m/s straight up. Neglecting air resistance. The maximum height reached will be calculated by using the formula
V^2 = U^2 - 2gH
U = 10 m/s
g = 9.8m/s^2
At maximum height, V = 0
Substitute u and g into the formula
0 = 10^2 - 2 × 9.8 × H
19.6H = 100
H = 100/19.6
H = 5.1 m
The Kinetic energy on the ball will be
K.E = 1/2mv^2
K.E = 1/2 × 1 × 10^2
K.E = 1/2 × 100
K.E = 50 J
But energy = work done
WD = Force × distance (height)
The force that acts on the baseball when it is HALF WAY to the top of the path will be
F × 5.1/2 = 50
F = 100/5.1
F = 19.61 N
The weight acting downward will be
W = mg
W = 1 × 9.8
W = 9.8 N
The net force acting on the ball will be
Net force = F - W
Net force = 19.61 - 9.8
Net force = 9.81 N
Therefore, the net force that acts on the baseball when it is HALF WAY to the top of the path is 9.81 N
Why would scientists call solids and liquids a condensed phase of matter?
Explanation:
Liquids and solids are often referred to as condensed phases because the particles are very close together.
If an element's atomic mass and atomic number are known, what else can be determined? Give an example to demonstrate your understanding
Answer:
Explanation:
If an elements atomic mass and number are known you can also determine the number of protons and neutrons it has. You can also determine where it is on the periodic table. For example, if a element had a atomic mass of 10 then it would be higher up on the table then one with a mass of 20. Btw I do apex too.
A student measured the specific heat of water to be 4.29 J/g.Co. The
literature value of the specific heat of water is 4.18 J/g.Co. What was the
student's percent error? *
A) .0256%
B) 2.56%
C) 2.63%
D) .0263%
Answer:
2.63 %.
Explanation:
Given that,
The calculated value of the specific heat of water is 4.29 J/g.C
Original value of specific heat of water is 4.18 J/g.C.
We need to find the student's percent error. The percentage error in any quantity is given by :
[tex]P=\dfrac{|\text{original value-calculated value}|}{\text{original value}}\times 100\\\\P=\dfrac{4.29-4.18}{4.18}\times 100\\\\P=2.63\%[/tex]
So, the student's percent error is 2.63 %.
Answer:
c
Explanation:
A projectile is launched at a 30° angle relative to the
ground. The projectile has an initial velocity of 15 m/s
and travels through the air for 2 seconds.
The horizontal displacement of the projectile, rounded to
the nearest hundredth, is
m.
Answer:
25.98
Explanation:
right answer
The horizontal displacement of the projectile is 25.98 m.
The given parameters;
angle of projection Ф = 30°
initial velocity of the projectile, u = 15 m/s
time of motion, t = 2 seconds
The horizontal displacement of the projectile is calculated as follows;
[tex]X = v_0_x \times t\\\\X = v_0 cos (\theta) \times t\\\\X = 15\times cos (30) \times 2\\\\X = 25.98 \ m[/tex]
Thus, the horizontal displacement of the projectile is 25.98 m.
Learn more here:https://brainly.com/question/15502195
Which state of matter has the MOST energy?
Answer:
Gas
Explanation:
The gas state of matter has the most energy because of how freely the molecules move
why VR is not affected by friction?
Answer:
Explanation:
VR ( Velocity ratio ) is the ratio of displacement to effort of load. So it is obvious that displacement takes place. Frictional force cannot change the displacement as it only an opposing force. So VR is not affected by friction.
Hope this helps
plz mark as brainliest!!!!!!!!
Answer:
because VR is velocity ratio
Bailey was driving down the street on her motorcycle and reduced her velocity from 25
m/s to 15 m/s over a distance of 8 meters. What is the magnitude of the motorcycle's
acceleration during this time!
Answer:
a = - 25 m/s²
Explanation:
The magnitude of acceleration or deceleration of an object can be found by using the third equation of motion as follows:
2as = Vf² - Vi²
where,
a = magnitude of acceleration = ?
Vf = Final Velocity = 15 m/s
Vi = Initial Velocity = 25 m/s
s = distance traveled = 8 m
Therefore,
2a(8 m) = (15 m/s)² - (25 m/s)²
a = (- 400 m²/s²)/(16 m)
a = - 25 m/s²
Here negative sign indicates deceleration
A delivery man is told to go 60 miles per hour north to make his delivery on time. These instructions grab the delivery man's( 2 points)
A. speed
B. velocity
C. acceleration
D. magnitude
Answer:
The answer is B, velocity.
Explanation:
Just took the quiz. Hope this helps! Please count as braniliest.
Answer:
The answer is velocity.
Explanation:
Remember velocity is the speed of something in a given direction.
and beside i just took the quiz ♡
12) A 26 kg chunk of ice is slid west across the frictionless surface of a frozen lake at 1.7 m/s . The chunk of ice collides with another chunk of ice, which is stationary and has a mass of 12 kg. The two chunks slide together as a single piece after the collision Calculate the final velocity of the combined ice chunks Show your work including the equation(s), values for the variables, and units
Answer:
1.16 m/s
Explanation:
Mass of first ice; m1 = 26 kg
Mass of second ice; m2 = 12 kg
Velocity of first ice; v1 = 1.7 m/s
Velocity of second ice; v2 = 0 m/s
From inelastic collision, the formula we will use is;
m1•v1 + m2•v2 = (m1 + m2)v'
Where v' is the final velocity of the combined ice chunks
Plugging in the relevant values gives;
(26 × 1.7) + (12 × 0) = (26 + 12)v'
44.2 = 38v'
v' = 44.2/38
v' ≈ 1.16 m/s
how do i solve?
a = bc
(b)
The electric field of a charge is defined by the force on what kind of particle?
a) electron.
b) proton.
c) source charge.
d) probe charge.
Answer:
correct answers C
Explanation:
the electric field is derived from Coulomb's law, where the charge has been assumed to be positive.
The expression remains
F = k q₁ q / r²
the electric field is
Fe = (k q₁ / r²) q
The amount between parentises rs constant
by checking the correct answers C
