Answer:
Not all of the time, it can also depend on the strength of the magnet.
Explanation:
say you have a small very strong magnet, that might work just as well as a large but week magnet.
How is light different than mechanical waves?
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 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
#SPJ6
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:
A chemical reaction is the only way to an
A: Element
B: Pure Substance
C: Mixture
D: Solution
Answer:
B: Pure Substance
Explanation:
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].
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
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.
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
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
Discuss your theory on why the light bulbs in the combination circuit have
different brightness.
Answer:
The voltage drop across each resistance is the same as the applied one. Hence most of the supplied voltage (the electrical energy) reaches the bulb. Hence it glows brighter. Now in the case of series combination of resistors, the effective resistance of the circuit increases.
Explanation: Discuss your theory on why the light bulbs in the combination circuit have
different brightness.
*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....
A snowboarder travels 17 m [N], 25 m [S], then 33 m [N]. Choose the correct
statement about the snowboarder's motion *
A. The snowboarder has a larger distance travelled than displacement
B. The snowboarder has a larger displacement than distance travelled
C. The snowboarder has more inertia after the 25 m trip than after the 17 m trip
D. The snowboarder has constant acceleration
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
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.
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
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
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:
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.
What is the reason for heat transfer from one substance to another?
OA. difference in pressure
OB.
difference in volume
O c.
difference in temperature
OD.
difference in mass
Answer:
A I think
Explanation:
heated air molecules have a lot if pressure and they try to release that pressure by either expanding or transfering
Which statement MOST LIKELY describes what changes when moving downwards from fluorine to chlorine on the periodic table?
A) The classification changes from nonmetal to metal
B) The ionic charge of the elements changes from positive to negative
C) The number of valence electrons increase
D) The number of total electrons increase
Answer:
B) The ionic charge of the elements changes from positive to negative
Explanation:
In the case when there is a moving towards downward direction from fluorine to chlorine on the periodic table so this represent that there are an ionic elements charge varies i.e. from positive to negative
Therefore as per the given situation the option b is correct
And, the rest of the options are wrong
Answer:
b
Explanation:
i took the test
This is an example of a ____________ resource using _______.
A'renewable;; wind
B'nonrenewable; wind
C;renewable; electricity
D;nonrenewable;electricity
Answer:
A
Explanation:
I guess but not sure cause wind is soemthing you can get back electricity is soemthing you can't
Can someone answer this multiple choice, and ignore the one I accidentally touched
Answer:
20N
Explanation:
Force= Mass*Acceleration
Force=10kg*2m/s^2
Force=20N
Answer:
20 N
Explanation:
Newton's Second Law of Motion gives us the relationship between force, mass, and acceleration:
F = maIn this problem, we are given the mass of the body and its acceleration.
m = 10 kg a = 2 m/s²Substitute these values into the formula to find the force acting on the body.
F = (10 kg)(2 m/s²) F = 20 kg · m/s² F = 20 NThe units for force is in Newtons, so the answer is the second option.
Plzz help! A stationary speed gun emits a
microwave beam at 2.41x1010 Hz. It
reflects off a pitched baseball and
returns 3190 Hz higher. What is the
speed of the baseball?
(Unit = m/s)
Answer:
The speed of the baseball is approximately 19.855 m/s
Explanation:
From the question, we have;
The frequency of the microwave beam emitted by the speed gun, f = 2.41 × 10¹⁰ Hz
The change in the frequency of the returning wave, Δf = +3190 Hz higher
The Doppler shift for the microwave frequency emitted by the speed gun which is then reflected back to the gun by the moving baseball is given by 2 shifts as follows;
[tex]\dfrac{\Delta f}{f} = \dfrac{2 \cdot v_{baseball}}{c}[/tex]
[tex]\therefore{\Delta f}{} = \dfrac{2 \cdot v_{baseball}}{c} \times f[/tex]
Where;
Δf = The change in frequency observed, known as the beat frequency = 3190 Hz
[tex]v_{baseball}[/tex] = The speed of the baseball
c = The speed of light = 3.0 × 10⁸ m/s
f = The frequency of the microwave beam = 2.41 × 10¹⁰ Hz
By plugging in the values, we have;
[tex]\therefore{\Delta f} = 3190 \ Hz = \dfrac{2 \cdot v_{baseball}}{3.0 \times 10^8 \ m/s} \times 2.41 \times 10^{10} \ Hz[/tex]
[tex]v_{baseball} = \dfrac{3190 \ Hz \times 3.0 \times 10^8 \ m/s }{2.41 \times 10^{10} \ Hz \times 2} \approx 19.855 \ m/s[/tex]
The speed of the baseball, [tex]v_{baseball}[/tex] ≈ 19.855 m/s
Can someone help with the problems?
Answer:
utrhh
Explanation:
hrtyrt
Explanation:
the answer is b
the second one is a
What is the momentum of a child on a wagon traveling at a velocity of 1.5
m/s if the combined mass of the child and the wagon is 225 kg?
Answer:
the momentum of the child is 337.5 kg.m/s
Explanation:
Given;
velocity of the wagon, v = 1.5 m/s
the combined mass of the child and the wagon, m = 225 kg
The momentum of the child is calculated as;
P = mv
substitute the given values of mass and velocity to determine the momentum,
P = 225 x 1.5
P = 337.5 kg.m/s
Therefore, the momentum of the child is 337.5 kg.m/s
Please help me I am desperate this is due now
Answer:
Distance travelled is 7 meters and the displacement is 3 meters
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
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 an example of an applied force?
1. a push or pull
2. friction
3. normal force
4. gravity