Freddie drives his car 10 km North. He stops for gas and then drives 5 km South.
What is Freddie's displacement.
Answer:
5 km
Explanation:
displacement is the straight line distance from a particular point. since north and south are in opposite directions, it means that he has taken a u-turn
thus, 10 - 5 = 5km displacement
Two Toy cars with white and red colours are moved to the same height. If the mass of the white
car is doubled for the same height what would happen to potential energy of white car and
why?
Answer:
what could be rhe answer
Answer:
Also will be doubled
Explanation:
because potential energy is directly proportional to mass which means when mass or height increases the potential energy will also increases
1. Explain how applied heat works between and at critical temperatures.
2. Explain how a refrigerator works to cool down warm objects that would otherwise be i
temperature.
3. Fill in the chart below to identify the name of the process that explains the state of cha
indicated, the states of matter being changed, or the points at which the process occu
Answer:
More heat is required for the change of state.
Explanation:
Applied heat works at critical temperatures because at this point more heat is needed by the substance in order to change the state of substance. At critical temperatures, the substance can't melt if no more heat energy is given to the substance. A refrigerator works to cool down warm objects by absorbing heat from the inside portion of the fridge and provides cool air which cools the inner side of the fridge. The point at which a solid changes into a liquid state is called melting point while on the other hand, the point at which a liquid changes into a gaseous state is known as boiling point of a substance.
a water bomber flying with a horizontal speed of 85m/s at a height of 3000m drops a load on a fire below. How far in front of the target fire should the load be released?
Answer:
2081.65 m
Explanation:
We'll begin by calculating the time taken for the load to get to the target. This can be obtained as follow:
Height (h) = 3000 m
Acceleration due to gravity (g) = 10 m/s²
Time (t) =?
h = ½gt²
3000 = ½ × 10 × t²
3000 = 5 × t²
Divide both side by 5
t² = 3000 / 5
t² = 600
Take the square root of both side
t = √600
t = 24.49 s
Finally, we shall determine the distance from the target at which the load should be released. This can be obtained as follow:
Horizontal velocity (u) = 85 m/s
Time (t) = 24.49 s
Horizontal distance (s) =?
s = ut
s = 85 × 24.49
s = 2081.65 m
Thus, the load should be released from 2081.65 m.
¿Una corriente eléctrica sin resistencia puede fluir constantemente sin fuente alguna de potencia? Explique.
Answer:
No.
Explicación:
No, una corriente eléctrica sin resistencia no puede fluir constantemente sin ninguna fuente de energía porque la fuente de energía proporciona electrones para el flujo continuo de corriente en el circuito. Si fluye corriente por el cable, debe haber resistencia en el circuito. La fuente de energía proporciona corriente eléctrica continua al cable para que fluya y el cable tiene resistencia, por lo que parte de la corriente eléctrica se pierde durante su flujo debido a esta resistencia. Entonces podemos decir que la fuente de energía es necesaria para el flujo constante de corriente eléctrica.
The volume of an object as a function of time calculated by V=At^3+B/t,where t is time measured in seconds and V is in cubic meters. Determine the dimension of the constants A and B
Answer:
A = L^3 T^-3 , B = L^3 T
Explanation:
Given: volume ( V ) = At^3 + B/t ------ ( 1 )
dimension of volume = L^3
and the Dimension of time = T
back to equation ( 1 )
L^3 = A * T^3 ------- ( 2 )
also L^3 = B/T ------- ( 3 )
from equation ( 2 )
A = L^3 T^-3
from equation ( 3 )
B = L^3 T
The dimensions of the constants A and B
A = L^3 T^-3 , B = L^3 T
A 0.547 kg pizza is thrown straight up in the air. At a height of 2.30 m above the surface of the earth it has a speed of 5.00 m/s. Calculate the total mechanical energy of the pizza crust.
Answer:
The total mechanical energy of the pizza crust is 19.2 J.
Explanation:
Mechanical energy is that which a body or a system obtains as a result of the speed of its movement or its specific position, and which is capable of producing mechanical work. Then:
Potential energy + kinetic energy = total mechanical energy
Kinetic energy is a form of energy. It is defined as the energy associated with bodies that are in motion and this energy depends on the mass and speed of the body.
Kinetic energy is defined as the amount of work necessary to accelerate a body of a certain mass and in a position of rest, until it reaches a certain speed.
Kinetic energy is represented by the following formula:
Ec = ½ *m*v²
Where Ec is kinetic energy, which is measured in Joules (J), m is mass measured in kilograms (kg), and v is velocity measured in meters over seconds (m / s).
In this case:
m=0.547 kgv= 5 m/sReplacing:
Ec = ½ *0.547 kg*(5 m/s)²
and solving you get:
Ec= 6.8375 J
On the other hand, potential energy is the energy that measures the ability of a system to perform work based on its position. In other words, this is the energy that a body has at a certain height above the ground.
Gravitational potential energy is the energy associated with the gravitational force. This will depend on the relative height of an object to some reference point, the mass, and the force of gravity. Then for an object with mass m, at height h, the expression applied to the gravitational energy of the object is:
Ep = m*g*h
Where Ep is the potential energy in joules (J), m is the mass in kilograms (kg) is h the height in meters (m) and g is the acceleration of fall in m / s² (approximately 9.81 m/s²)
In this case:
m= 0.547 kgg= 9.81 m/s²h= 2.30 mReplacing
Ep= 0.547 kg *9.81 m/s²* 2.30 m
and solving you get:
Ep= 12.342 J
So:
Total mechanical energy= 12.342 J + 6.8375 J
Total mechanical energy= 19.1795 J≅ 19.2 J
The total mechanical energy of the pizza crust is 19.2 J.
A 0.25 kg book falls off a 2 m shelf on to a 0.5 m chair. What was the change in GPE?
The equation of GPE is mgH, where m is mass, g is gravitational acceleration, and H is the height.
If we're solving for the change in GPE, then:
∆[tex]U_{g}[/tex] = mg∆H
Input our given values for m and g:
∆[tex]U_{g}[/tex] = 0.25 * 9.80 * ∆H
The book falls from 2 meters high to 0.5 meters high, so:
∆[tex]U_{g}[/tex] = 0.25 * 9.80 * (2.0 - 0.5)
∆[tex]U_{g}[/tex] = 0.25 * 9.80 * 1.5
∆[tex]U_{g}[/tex] = 3.675 (J)
Adjust for significant figures:
∆[tex]U_{g}[/tex] = 3.7 (J)
The change in gravitational potential energy was 3.7 (J)
If you have any questions on anything I did to get to the answer, just ask!
- breezyツ
1. What is the difference between longitudinal and transverse waves? Compare and contrast
the direction of their movement, movement of a molecule through the completion of a cycle,
and amplitude and wavelength measurements of each type of wave.
Answer: image to much to type.
Explanation:
Which region of a longitudinal wave is this?
A. Rarefaction
B. Diffusion
C. Compression
D. Diffraction
The region of a longitudinal wave that is represented by an arrow is known as rarefaction. Thus, the correct option for this question is A.
What is a Longitudinal wave?A longitudinal wave may be defined as a type of wave where the displacement of the medium is in the same direction as the direction of the traveling wave. The distance between the centers of two consecutive regions of compression or the rarefaction is defined by wavelength, λ.
Longitudinal waves express areas of compression and rarefaction: compressions are regions of high pressure due to particles being close together. Rarefactions are regions of low pressure due to particles being spread further apart.
Therefore, the region of a longitudinal wave that is represented by an arrow is known as rarefaction. Thus, the correct option for this question is A.
To learn more about Longitudinal waves, refer to the link:
https://brainly.com/question/14364881
#SPJ2
6A. Which pair of charges has a stronger attraction, top or bottom?
6B Based on the picture above, what is the relationship between
distance between charges and force?
What is the electrical force between 91 and 92? Recall
that k = 8.99 * 109 Nom?
2 m
9, +6 C
9,=-40
+1 m +
O 4.3 x 1010 N
q = +3 C O 3,5 x 1010 N
O -5.4 x 1010 N
O -5.8 x 10101
Answer:
F = 5.39 x 10¹⁰ N
Explanation:
The electrical force between q₁ and q₂ can be calculated by Coulomb's Law:
[tex]F = \frac{kq_1q_2}{r^2}\\\\[/tex]
where,
F = electrical force = ?
k = Coulomb Constant = 8.99 x 10⁹ Nm²/C²
q₁ = first charge = +6 C = 6 C
q₂ = -4 C = 4 C
r = distance between charges = 2 m
Therefore,
[tex]F = \frac{(8.99\ x\ 10^9\ N.m^2/C^2)(6\ C)(4\ C)}{(2\ m)^2}\\\\[/tex]
F = 5.39 x 10¹⁰ N
Answer:
C on edge
Edge2021
A 30.0 kg rock falls from a 35.0 m cliff. What is the kinetic and potential energy when the rock has fallen 12.0 m?
Answer:
When the rock has fallen 12.0 m;
The kinetic energy of the rock is approximately 3,531.6 J
The potential energy of the rock is approximately 6,768.9 J
Explanation:
The question relates to the characteristic constant total mechanical energy of a body
The mass of the rock that falls, m = 30.0 kg
The height of the cliff from which the rock falls, h₁ = 35.0 m
The required information = The kinetic and potential energy when the rock has falling 12.0 m
The kinetic energy is given by the formula, K.E. = 1/2×m×v²
The potential energy is given by the formula, P.E. = m·g·h
Where;
g = The acceleration due to gravity ≈ 9.81 m/s²
The velocity of the rock after falling through a given height, h is given by the formula, v² = 2·g·Δh
The total mechanical energy of the rock, M.E. = K.E. + P.E. = Constant
At the height of the cliff before falling, Δh =0, therefore v₁ = 0, therefore, K.E. = 1/2×m×v₁² = 0 J
The potential energy at the cliff before the rock begins to fall, P.E. is goven as follows;
P.E. = 30.0 kg × 35.0 m × 9.81 m/s² = 10,300.5 J
At the top of the cliff, M.E. = K.E. + P.E. = 0 J+ 10,300.5 J = 10,300.5 J
∴ M.E. = 10,300.5 J
When the rock has fallen, 12.0 m, Δh = 12.0 m, the speed of the rock, v₂, is given as follows;
v₂² = 2 × 9.81 m/s² × 12.0 m = 235.44 m²/s²
v₂ = √(235.44 m²/s²) ≈ 15.344 m/s
∴ When the rock has fallen 12.0 m, K.E., is given as follows;
K.E. = 1/2×m×v₂²
K.E. = 1/2 × 30.0 kg × 235.44 m²/s² = 3,531.6 J
When the rock has fallen 12.0 m the kinetic energy, K.E. = 3,531.6 J
When the rock has fallen 12.0 m, M.E. = P.E. + K.E.
M.E. = Constant = 10,300.5 J
K.E. = 3,531.6 J
∴ 10,300.5 J = P.E. + 3,531.6 J
P.E. = 10,300.5 J - 3,531.6 J = 6,768.9 J
∴ When the rock has fallen 12.0 m, the potential energy, P.E. = 6,768.9 J.
[tex]\huge\mathfrak\red{Question}[\tex]
When two magnets repel, they
A. break
B. pull together
C. push apart
D. change color
Answer:
option C : they push apart
Explanation:
If you hold two magnets the wrong way around, they push apart - they repel! In other words, if you hold two magnets together so that like-poles are close together (two norths OR two souths), they repel
Answer:
the magnet push apart
Explanation:
that is the two magnet are facing each other with the same pole...
that is to say like pole push apart and unlike pole attract
1. What was Swimmer C's average speed?
2. What was Swimmer A's average speed during the period 10 min to 20 min?
Answer:
4.8 km/hr ;
0
Explanation:
Based on information plotted on the graph :
Distance traveled by swimmer C = 2400 m
Travel time of swimmer C = 30 minutes
Converting distance to km:
2400 m = 2400 / 1000 = 2.4 km
Converting time to hour :
30 minutes = 30 / 60 = 0.5 hour
Average speed = Distance traveled / time taken
Average speed = 2.4 km / 0.5 hour = 4.8 km/hr
2.)
Swimmer A's average speed during the period 10 to 20 minutes ;
Change in distance /change in time
(400 - 400) / (20 - 10) = 0
Hence, distance traveled is 0
Please I need help in this now
Answer:
a
Explanation:
worng worng
About wave properties please help
Answer:
The basic properties (parts) of a wave include: frequency, amplitude, wavelength and speed. Frequency is a measure of how many waves pass a point in a certain amount of time. The higher the frequency, the closer the waves are together and the greater the energy carried by the waves will be.
Explanation:
HOPE IT HELPS U
FOLLOW MY ACCOUNT PLS PLS
Sphere B of charge +8q is at a distance a to the left of sphere A, and sphere C of charge +2q is to the right of sphere A.
What must be the distance from sphere A to sphere C on the right such that the original small sphere remains at rest?
Answer:
The distance from sphere A to sphere C on the right such that the original small sphere remains at rest is a/2
Explanation:
The force of a charge at a point is given as follows;
From an online source, we have;
E₁ + E₂ = 0
The electric field due to the sphere B of charge +8q = E₁
[tex]E_1 = \dfrac{k \cdot (8 \cdot Q)}{a^2}[/tex]
The position of the sphere B = A distance 'a' to the left of 'A'
The electric field due to the sphere C of charge +2q = E₂
The position of the sphere C = A distance to the right of 'A'
Therefore, for the electric field strength of sphere 'B' at 'A', we have;
[tex]E_1 = \dfrac{k \cdot (8 \cdot Q)}{a^2} = 4 \times \dfrac{k \cdot (2 \cdot Q)}{a^2}[/tex]
Let 'x' be the distance of the +2q charge to the right of 'A', we have;
[tex]E_2 = \dfrac{k \cdot (2 \cdot Q)}{x^2}[/tex]
Therefore, for the force of the +2q charge to balance the +8q charge at C, we have;
[tex]\dfrac{k \cdot (2 \cdot Q)}{x^2} = \dfrac{k \cdot (8 \cdot Q)}{a^2} = 4 \times \dfrac{k \cdot (2 \cdot Q)}{a^2}[/tex]
[tex]\therefore \ \dfrac{1}{x^2} = \dfrac{4}{a^2}[/tex]
[tex]\therefore \ \sqrt{ \dfrac{1}{x^2} }= \sqrt{\dfrac{4}{a^2}}[/tex]
[tex]\dfrac{1}{x} = \dfrac{2}{a}[/tex]
[tex]x= \dfrac{a}{2}[/tex]
Therefore, the distance, 'x', from sphere A to sphere C on the right such that the original small sphere remains at rest is x = a/2.
What causes tides to occur?
The gravitational attraction between the Sun, Earth, and Moon.
The magnetic pull of the Earth's poles
The shaking of the earth during earthquakes
Seafloor spreading
Answer:
The gravitational attraction between the sun earth and moon
the instrument used in measuring the speed of wind is called
Answer:
please give me brainlist and follow
Explanation:
Anemometers
The anemometer counts the number of rotations, which is used to calculate wind speed. An anemometer is an instrument that measures wind speed and wind pressure. Anemometers are important tools for meteorologists, who study weather patterns.
A wheelbarrow is pushed with a force of 40 N. If 6,000 J of work is
done, what is the total distance the wheelbarrow was pushed?
Answer:
Distance = 150 meters
Explanation:
Given the following data;
Work done = 6,000 Joules
Force = 40 Newton
To find the total distance covered by the wheelbarrow;
Workdone = force * distance
Substituting into the formula, we have;
6000 = 40 * distance
Distance = 6000/40
Distance = 150 meters
Therefore, the total distance the wheelbarrow was pushed is 150 meters.
If the air is only holding one-third as much moisture as it can possibly hold
Answer:
humoidity
Explanation:
If you begin with 40 grams of a radioactive isotope and end with 10 grams, how many half-lifes of the radioactive isotope have passed ?
ANSWER FOR BRAINLEST AND 25 POINTS what is the word for this definition
definition = Unit of energy the amount of heat needed to raise one gram of water one degree Celsius
word?
Approximately how much electrical energy does a 5-W lightbulb convert to radiant and thermal energy in one hour?
Answer:
18,000 j
Explanation:
the lightbulb dissipates 5W of power
P = ΔE / Δt
rearrange to solve for energy
ΔE = PΔt
P = 5W
t = 1 hour = 60 minutes = 3600 seconds
ΔE = 5 * 3600
ΔE = 18000 J
What is the current reading on ammeter A
Answer:
0.8A
Explanation:
HELP ME ASAP PLZZZ NOW!!!
Answer:
B. It's nucleus releases energy
Explanation:
Are the number of atoms before and after a chemical reaction the same? Why?
Answer:
They rearrange themselves and join together differently to make new substances called products. The number of atoms of each type is the same before and after a reaction. This means that the total mass of the products is the same as the total mass of the starting substances. In other words, mass is conserved.
Objects 1 and 2 attract each other with a electrostatic force
of 36.0 units. If the distance separating Objects 1 and 2 is
changed to one-half the original value (i.e., halved), then the
new electrostatic force will be units.
Answer:
F = 144 units
Explanation:
For this exercise we use coulomb's law, for the initial conditions
F₀ = [tex]k \frac{q_1q_2}{r_o^2}[/tex]
indicate that the force F₀ = 36.0 units and the distance is reduced to r = r₀/2 which is the new force
F = [tex]k \frac{ q_1q_2 }{(r_o/2)^2}[/tex]
we substitute
F = 4 [tex]k \frac{q_1q_2}{r_o^2}[/tex]
F = 4 F₀
we calculate
F = 4 36
F = 144 units
- 3000 J of work is done on a 2kg object over a distance of 10m. What is the force acting on the object?
A.1500N
B.300N
C.3000N
D.600ON
