Answer:
Gravity
Explanation:
On earth there is always Gravity, so if its pushing you down you have your answer.
A 10 kg box initially at rest is pulled with a 50 N horizontal force for 4 m across a level surface. The
force of friction acting on the box is a constant 20 N. What type of energy does the box have after it
is done being pulled?
A. Elastic
B. Gravitational
C. Chemical
D. Kinetic
Can someone help with the problems?
Answer:
utrhh
Explanation:
hrtyrt
Explanation:
the answer is b
the second one is a
What is used in a torch?
a. Dry cell
b. Secondary cell
c. Generator
d. Fuse
Answer:a.Dry cell
Explanation: A dry cell is a type of electric battery, commonly used for portable electrical devices like a flashlight
Answer:a.Dry cell
Explanation:
What is the weather like in a temperate grassland? (Select all that apply.)
summers are mild to hot
winters are cold
summers are cool
winters are mild
A car's wheel has a rotational inertia of 2.0\,\text {kg} \cdot \text m^22.0kg⋅m 2 2, point, 0, start text, k, g, end text, dot, start text, m, end text, squared. The wheel initially has a counterclockwise angular speed of 6.0\,\dfrac{\text {rad}}{\text s}6.0 s rad 6, point, 0, start fraction, start text, r, a, d, end text, divided by, start text, s, end text, end fraction, but has a constant clockwise torque of 15 \,\text N \cdot \text m15N⋅m15, start text, N, end text, dot, start text, m, end text applied for 4.0\,\text s4.0s4, point, 0, start text, s, end text.
Answer:
-48
Explanation:
Answer:
6.0
Explanation:
If this is the problem on Khan Academy, I had done this and this was the correct answer.
A constant force of 12 N acts for 5 s on a 5 kg object. What is the change in object’s velocity?
Answer:
"solve: given that F -12 N and time 4 seconds and let we have to find out the P.
F = 12 N
t = 4 s
p = ?
F = m×( v - u ) / t
12 = m×v / 4
m×v = 12× 4
p = 48 kg m/s
Linear momentum will be 48 kg m/s.
Explanation:
simplify and leave your answer with positive index
2^n-4×16^1+n
/
8^-n×4^-4n
Answer:
2¹⁶ⁿ
Explanation:
2ⁿ¯⁴ × 16¹⁺ⁿ / 8¯ⁿ × 4¯⁴ⁿ
The above expression can be simplified as follow:
2ⁿ¯⁴ × 16¹⁺ⁿ / 8¯ⁿ × 4¯⁴ⁿ
Recall:
16 = 2⁴
8 = 2³
4 = 2²
Thus,
2ⁿ¯⁴ × 16¹⁺ⁿ / 8¯ⁿ × 4¯⁴ⁿ
= 2ⁿ¯⁴ × 2⁴⁽¹⁺ⁿ⁾ / 2³⁽¯ⁿ⁾ × 2²⁽¯⁴ⁿ⁾
= 2ⁿ¯⁴ × 2⁴⁺⁴ⁿ / 2¯³ⁿ × 2¯⁸ⁿ
Recall:
Mᵃ × Mᵇ = Mᵃ⁺ᵇ
2ⁿ¯⁴ × 2⁴⁺⁴ⁿ / 2¯³ⁿ × 2¯⁸ⁿ
= 2⁽ⁿ¯⁴⁾⁺⁽⁴⁺⁴ⁿ⁾ / 2¯³ⁿ⁺⁽¯⁸ⁿ⁾
= 2ⁿ¯⁴⁺⁴⁺⁴ⁿ/ 2¯³ⁿ¯⁸ⁿ
= 2⁵ⁿ / 2¯¹¹ⁿ
Recall:
Mᵃ / Mᵇ = Mᵃ¯ᵇ
2⁵ⁿ / 2¯¹¹ⁿ = 2⁵ⁿ¯⁽¯¹¹ⁿ⁾
2⁵ⁿ / 2¯¹¹ⁿ = 2⁵ⁿ⁺¹¹ⁿ
2⁵ⁿ / 2¯¹¹ⁿ = 2¹⁶ⁿ
Therefore,
2ⁿ¯⁴ × 16¹⁺ⁿ / 8¯ⁿ × 4¯⁴ⁿ = 2¹⁶ⁿ
acontainer is filled whith mercury to alevel of 10m whit water to alevel of 8m and whit oil to alevel of 5m the densities oil ,water and mercury are 0.8g/cm³,1g/cm³ and 13.6g/cm³ calculate the total pressure exerted by the liquids at the base
Answer:
1450.4 KN[tex]m^{2}[/tex]
Explanation:
Pressure = ρhg
where: ρ is the density of the liquid, h is the height and g the force of gravity.
Total pressure exerted by the liquids at the base = Pressure of oil + Pressure of water + Pressure of mercury
So that,
i. Pressure of oil = ρhg
(ρ = 0.8 g/cm³ = 800 kg/m³)
= 800 x 5 x 9.8
= 39200
Pressure of oil = 39200 N[tex]m^{2}[/tex]
ii. Pressure of water = ρhg
(ρ = 1 g/cm³ = 1000 kg/m³)
= 1000 x 8 x 9.8
= 78400
Pressure of water = 78400 N[tex]m^{2}[/tex]
ii. Pressure of mercury = ρhg
(ρ = 13.6 g/cm³ = 13600 kg/m³)
= 13600 x 10 x 9.8
= 1332800
Pressure of mercury = 1332800 N[tex]m^{2}[/tex]
So that,
Total pressure exerted by the liquids at the base = 39200 + 78400 + 1332800
= 1450400
= 1450.4 KN[tex]m^{2}[/tex]
Total pressure exerted by the liquids at the base is 1450.4 KN[tex]m^{2}[/tex].
Plssss I need help——— Balloon A is (A. Negatively, B. Not, C. Positively) charged, and balloon C is (A. Negatively, B. Not, C. Positively) charged. Balloon A approaches balloon C, there’ll be a force of (A. Attraction, B. Repulsion) between them.
Answer:
B. Not
C. Positively
A. Attraction
How is light different than mechanical waves?
A chemical reaction is the only way to an
A: Element
B: Pure Substance
C: Mixture
D: Solution
Answer:
B: Pure Substance
Explanation:
Please help, I don't get this
Freefalling object starts from rest after falling for six seconds what will be its velocity
Answer:
60m/s
Explanation:
since the object is falling under the influence of gravity, the formula is
v = u +gt
before the fall, the object is at rest then
u = 0m/s
v = 0 + 10×6 because acceleration due to gravity is g which is given as 10m/s2
therefore, v = 60m/s
give two reasons why biomass energy might not be a good alternative Energy source
[tex] \sf{ \huge}{ \colorbox{black}{l \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: }}[/tex]
as for the production of biomass energy wood is mostly used source and burning of wood for the production of biomass energy can lead to the risk of deforestation in the future and emissions of carbons, pollute the surrounding. Thus this is the reason biomass energy might not be a good alternative energy source.
[tex] \sf{\huge}{\colorbox{black}{I \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: }}[/tex]
15 facts of conservation of energy
Answer:
Ello, estoy aquí para ayudar, pero hablo español con optimismo, comprenderá lo que estoy diciendo. Intentaré ayudarlo. Espero que tengas un buen dia <3
Explanation:
*will give brainlyest thingy*
Mixtures can be separated by different methods. The method for
separation depends on _____
such as particle size,
shape, color, and magnetic attraction.
-chemical properties
-physical properties
-matter
-mass
Answer:
chemical properties
Explanation:
i don't why I choose that answer....
does sound waves move quicker through cold or warm matter
Answer:
Warm matter
Explanation:
Atoms in warm matter are more easily excitable - they jiggle and move more rapidly than atoms in a cold environment, and since a sound wave is a wave of vibrating matter, these waves will naturally travel quicker when it's warmer.
Please help me I am desperate this is due now
Answer:
Distance travelled is 7 meters and the displacement is 3 meters
Which of the following statements best describe the frequency of a wave?
A. It tells the height of each wave that passes through a given amount of time
B. It tells the number of wave cycles that passes through a given amount of time.
C. It tells how fast or slow a wave is moving
D. It tells the length of each wave that passes through a given amount of time
Answer:
I believe the answer is B.
Uranus requires 84 years to circle the sun. Find uranus's average distance from the sun as multiple of earth's average distance from the sun
Answer:
Uranus’ distance from the Sun is 2.88 billion km. The exact number is 2,876,679,082 km. Want that number in miles? Uranus’ distance from the Sun is 1.79 billion miles.
Explanation:
Uranus's average distance from the sun as multiple of earth's average distance from the sun is 19.2 AU.
According to Kepler's third law, the square of the period of revolution of the planets is equal to the cube of their mean distance from the sun in astronomical units.
Using this law;
T^2 = r^3
T = period of revolution = 84 years
r = distance = ?
r = 3√T^2
r = 3√( 84)^2
r = 19.2 AU
Learn more: https://brainly.com/question/8646601
Calculate the momentum of a 1000 kg sports car traveling at 30 m/s.
Answer:
30,000 kgm/s
Explanation:
m = 1000 kg
v = 30 m/s
Plug those values into the equation:
p = mv
p = (1000 kg)(30 m/s)
p = 30,000 kgm/s
The momentum of a 1000 kg sports car traveling at 30 m/s is 30,000 kgm/s.Linear momentum = Mass x Speed.
What is the momentum?The product of an object's mass, m, and its velocity, v, is the vector quantity known as linear momentum. It is represented by the letter "p," which is also used to denote momentum.
Mass of car = 1000 kg
Speed by which car moves = 30 m/s. The momentum of the car =?
Recall that:
Linear momentum = Mass x Speed
= 1000 kg x 30 m/s.
= 30,000 kgm/s
The sum of an object's mass (m) and velocity (v) is known as the object's linear momentum. An equation can be used to explain this relationship. Momentum is defined as the body's mass times its velocity. P = m times v, etc.
Therefore, the momentum of a 1000 kg sports car is 30,000 kgm/s if travels at 30 m/s.
Learn more about momentum, here:
https://brainly.com/question/15350658
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what is the correct equation for calculating kinetic energy?
1. kinetic energy = potential energy - total energy
2. kinetic energy = total energy - potential energy
3. kinetic energy = 1/2 x (total energy + potential energy)
4. kinetic energy = potential + total energy
Answer:
2. kinetic energy = total energy - potential energy
Explanation:
The total energy of a system is the addition of kinetic and potential energy of the system. Kinetic energy can be regarded as form of energy posses by an object when it's in motion
Total energy = kinetic energy + potential energy
(If we make Kinectic energy the subject of the formula, we have)
kinetic energy = total energy - potential energy
Please I need help its timed-
Students in a science class observed that when a strip of magnesium (Mg) metal was placed in a test tube containing hydrochloric acid (HCl), the magnesium began to bubble as hydrogen gas and magnesium chloride are formed. Which of the following choices show both the correctly balanced equation and identify the type of reaction?
A.
Mg + 2HCl →2H2 + MgCl2 (single replacement)
B.
Mg + 2HCl →H2 + MgCl2 (single replacement)
C.
Mg + 2HCl →H2 + MgCl2 (synthesis)
D.
2Mg + HCl →H2 + 2MgCl2 (synthesis)
Answer:
c
Explanation:
The amplitude of a paricular wave is 4.0 m. The crest to trough distance
would be...
1. 8.0 m
2. 2.0 m
3. 4.0 m
4. 16.0 m
Answer:
The crest to trough distance = 8 m
Explanation:
Given that,
The amplitude of a particular wave is 4.0 m.
We need to find the crest to trough distance.
We know that,
Amplitude = The distance from the base line to the crest or the the distance from the baseline to the trough.
It means,
Distance from crest to trough = 2(Amplitude)
= 2(4)
= 8 m
Hence, the crest to trough distance is equal to 8 m.
please I need help its timed-
Students in a science class observed that when a strip of magnesium (Mg) metal was placed in a test tube containing hydrochloric acid (HCl), the magnesium began to bubble as hydrogen gas and magnesium chloride are formed. Which of the following choices show both the correctly balanced equation and identify the type of reaction?
A.
Mg + 2HCl →2H2 + MgCl2 (single replacement)
B.
Mg + 2HCl →H2 + MgCl2 (single replacement)
C.
Mg + 2HCl →H2 + MgCl2 (synthesis)
D.
2Mg + HCl →H2 + 2MgCl2 (synthesis)
Answer:c i think
Explanation:
A. Mg + 2HCl →2H2 + MgCl2 (single replacement)
What is single replacement?
A single replacement reaction is a type of chemical reaction in which one element is replaced by another element from a compound. In a single replacement reaction, an element reacts with a compound to form a new compound, in which one of the elements has been replaced.
For example, in the reaction Mg + 2HCl → 2H2 + MgCl2, the magnesium reacts with the hydrochloric acid to form hydrogen gas and magnesium chloride, with the magnesium taking the place of hydrogen in the compound.
Learn more about single replacement, here:
https://brainly.com/question/392491
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A stationary 2 kg football is kicked by a footballer, the football moves off with a velocity of 5 m/s. If the footballer is in contact with the football for 0.5 s, what is the average force applied by the footballer
on the football?
Please helppp!!!!
Answer:
F = 20 N
Explanation:
Given that,
Mass of the football, m = 2 kg
Initial speed, u = 0
Final speed,v = 5 m/s
The time of contact, t = 0.5 s
We need to found the average force applied by the footballer on the football. We can find it using the formula.
[tex]F=\dfrac{m(v-u)}{t}\\\\F=\dfrac{2\times (5-0)}{0.5}\\\\F=20\ N[/tex]
So, the required force is 20 N.
Answer:
F=20
Explanation:
f=20
PLEASE HELP
TOPIC - CONVECTION
Answer:
At B
Explanation:
If it's placed on place B as soon as the cold water arrived it will have time to heat. Hope this helps and best of luck
The object of the soccer game is to put the____
into the opponent's
Fill in the blank and I’ll give brainly
Answer:
BALL
Explanation:
what is BALL/ SOCCER BALL
HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP
A ball with a mass of .012 kg moving at 15.0 m/s collides with a second ball with a mass of 36 g
moving at 5.0 m/s. After the collision, the 12 g ball moves in the same direction at 6.0 m/s. What
is the resulting velocity of the 36 g ball?
Answer:
Final velocity of ball B V2 = 8 m/s
Explanation:
Given:
Mass of Ball A M1 = 12 gram
Mass of Ball B M2 = 36 gram
Initial velocity of ball A U1 = 15 m/s
Initial velocity of ball B U2 = 5 m/s
Final velocity of ball A V1 = 6 m/s
Find:
Final velocity of ball B V2
Computation:
Using conservation of momentum;
M1U1 + M2U2 = M1V1 + M2V2
(12)(15) + (36)(5) = (12)(6) + (36)(v2)
180 + 180 = 72 + (36)(v2)
Final velocity of ball B V2 = 8 m/s
In order to move a bag of dog food across a room that measures 8 meters in length, you apply 10 Newtons of force. How much work was done?
Answer:
80 joules of work
Explanation:
Use W=F·d
W=10N(8M)= 80 Joules