Answer:
Initial velocity of rock = 11.6 m/s
Explanation:
Given:
Final velocity of rock = 90 m/s
Time taken by rock = 8 seconds
Find:
Initial velocity of rock
Computation:
Using first equation of motion;
v = u + at
For rock
v = u + gt
Acceleration due to gravity = 9.8 m/s²
90 = u + (9.8)(8)
90 = u + 78.4
u = 90 - 78.4
u = 11.6
Initial velocity of rock = 11.6 m/s
what forms of energy best describes the energy stored in food
Answer:
probably potentially energy
Explanation:
hopefully this helps
what is work done aganist gravity?
Lifting an object and becomes potential energy of the object (Earth system). The change in gravity potential energy, ΔPEg, is ΔPEg = mgh.
With h being the increase in height and g the acceleration due to gravity.
I hope this helped :T
Explain how the light behaves with light through a
plastic bulb
Answer:
It's red
Explanation:
Blue light has a shorter distance between wave crests than orange light. Red light has a longer distance between wave crests than blue light.
Un vehiculo se desplaza con movimiento rectilio uniforme. Sabiendo que recorre 90 km en 3 horas. Averiguo la velocidad en m/s.
Answer:
Velocidad = 500 m/s
Explanation:
Dados los siguientes datos;
Distancia = 90 km
Tiempo = 3 horas
Conversión;
Por distancia:
1 kilómetro = 1000 metros
90 kilómetros = 90 * 1000 = 90,000 metros
Para el tiempo:
1 hora = 60 segundos
3 horas = 60 * 3 = 180 segundos
Para encontrar la velocidad en m/s;
Matemáticamente, la velocidad viene dada por la ecuación;
[tex] Velocidad = \frac {distancia} {tiempo} [/tex]
Sustituyendo en la fórmula, tenemos;
Velocidad = 90000/180
Velocidad = 500 m/s
A tuning fork is struck against a hard surface. The particles in the tuning fork begin to vibrate quickly, transmitting a wave. What kind of wave does the tuning fork transmit?
Answer:
Longitudinal waves
Explanation:
Tuning forks create sound waves and sound waves are longitudinal
If two balls have the same amount of mass and the red ball is resting at a height of 2m and the blue ball is resting at a height of 4m, which has more potential energy?
A) red ball
B) blue ball
Two trucks have the same mass. Which truck will have a greater amount of kinetic energy? b. The truck with less mass d. The trucks will have the same kinetic energy c. The truck with greater speed a. The truck with more mass
Answer:
c. The truck with greater speed
Explanation:
Energy can be defined as the ability (capacity) to do work. The two (2) main types of energy are;
a. Gravitational potential energy (GPE): it is an energy possessed by an object or body due to its position above the earth.
b. Kinetic energy (KE): it is an energy possessed by an object or body due to its motion.
Mathematically, kinetic energy is given by the formula;
[tex] K.E = \frac{1}{2}MV^{2}[/tex]
Where;
K.E represents kinetic energy measured in Joules.
M represents mass measured in kilograms.
V represents speed or velocity measured in metres per seconds square.
From the above formula, we can deduce that the kinetic energy of an object is directly proportional to the square of the value of its velocity or speed.
Hence, the truck with greater speed would have a greater amount of kinetic energy.
Answer:
The trucks will have the same kinetic energy.
Explanation:
Both of the trucks have the same mass, so they have the same kinetic energy. Hope this helps!
Explain why does the bowling ball decelerate as it travels along the lane.
Answer:
Due to the force of friction
Explanation:
Whenever an object comes in contact with a surface the force of friction comes into play
Which slows down the object (in this case the bowling ball)
Which situation would create a field like the one shown here?
A. interaction between two magnetic south poles
B. interaction between two magnetic north poles
C. interaction between a south pole and a north pole
D. interaction between a magnetic south pole and a copper bar
A Normal force of 16N is distributed uniformly on top surface of a cube of edge 6cm. The
pressure on this surface is Rx104Pa. Find the value of R
Answer:
approx. 0.43
Explanation:
Area of the side of the cube is 36 cm or 0.36 m, P= F/A, so R*104=16/0.36, R*104≅44.44, R≅0.43
The blocks shown in the pictures below are all made of wood. Which car will move the fastest?
Answer:
The one with the less mass
Explanation:
URGENT HELP PLS
Suppose a force F, = (1/3)x acts on an
object. Assume at x = 0 the force pushes
the object and it starts moving to the right.
What happens to the magnitude of the work
done as the object moves to the right?
A. More work is done
B. Less work is done
C. A constant amount of work Is done.
D. It is impossible to predict
Answer:constant amount of work is done
no files.
Please hurry I’m not trynna fail
Answer:
Larger, because both the Sun and Moon are pulling it.
Explanation:
this is known as the -------of light.
Answer:
rectilinear propagation of light
reflection of light
refraction of light
The
is the particle in the nucleus with a positive charge.
Answer here
How are wave properties and energy related?
EXPLAIN
Answer:
The higher the amplitude, the higher the energy. To summarise, waves carry energy. The amount of energy they carry is related to their frequency and their amplitude. The higher the frequency, the more energy, and the higher the amplitude, the more energy.
which instrument measure the intensity of sound
Answer:
Decibel Meter
A decibel meter is a measuring instrument used to assess noise or sound levels by measuring sound pressure. Often referred to as a sound pressure level (SPL) meter, decibel (dB) meter, noise meter or noise dosimeter, a sound level meter uses a microphone to capture sound.
Answer:
Decibel Meter
Explanation:
A decibel meter is a measuring instrument used to assess noise or sound levels by measuring sound pressure.
Sodium has an atomic mass of 23 and an atomic number of 11, so the
number of neutrons must be_______
Answer here
Answer:
12 Neutrons
Explanation:
So the mass of sodium is 22.990. You round it up to get 23(as stated in the problem). So, what exactly is atomic mass?
Atomic Mass is the total amount of neutrons and protons added up to form a total mass. So when you subtract 23-11 you get 12 Neutrons.
Tip: Don't know if you need this but-
The neutrons and protons are typically close in number (unless it's an isotope). So say that you subtract and the numbers of protons and neutrons aren't close at all. Well if that's the case, it's probably wrong.
hope this helps!!
help yo if u can answer quicly
Answer:
maybe c
I think its c
hope it helped
Uhm? I listen in class but I can remember all of that wat is this omg?
Answer:
The side with the same length would be D.) QT
Explanation:
The problem is asking for the side with the same length, and the shapes are congruent so the correct one would be the same side on the other shape. Which is D.) QT
Atoms have the same number of electrons as what other particle?
A. Protons
B. Neutrons
C. Photons
D. Atomic mass
Identify the relationship between the two quantities in the given question as causation or
correlation.
1. The number of cold, snowy days and the amount of hot chocolate sold at a ski
resort.
2. The number of miles driven and the amount of gas used.
3. The number of additional calories consumed and the amount of weight gained.
4. The age of a child and his/her shoe size.
5. The amount of cars a salesperson sells and how much commission he makes.
6. The number of cars traveling over a busy holiday weekend and the number of
accidents reported.
7. The number of homework assignments turned in and how well an individual does in
class.
8. The annual salary and blood pressure for men ages 20-60
Answer:2. The number of miles driven and the amount of gas used.
Explanation:
help asap!
three resistors of 20. ohms, 30. ohms, and 60. ohms, respectively, are connected in series with a battery. a current of 2.0 amperes will flow through this circuit when the potential difference of the battery is a. 20.V b. 220 V c. 110 V d. 10.V.
Answer:
b. 220 V
Explanation:
Let resistors be R1, R2, and R3 respectively.
Given the following data;
R1 = 20 ohms
R2 = 30 ohms
R3 = 60 ohms
Current = 2 Amperes
To find the voltage;
First of all, we would determine the total effective resistance (RT).
For series circuit;
RT = R1 + R2 + R3
RT = 20 + 30 + 60
RT = 110 Ohms
Next, we find the voltage using the formula;
Voltage = current * resistance
Voltage = 2 * 110
Voltage = 220 Volts
A 8.7kg cart travels down a 18.1m high hill. Determine the final kinetic energy if 100J of
energy is lost to friction.
Answer:
Explanation:
E = mgh
E(final) = E - friction
E(final) = 8.7 * 9.81 * 18.1 - 100 = 1444.8 J
Hi, I'm stuck on the problem: Consider a resistor (R=1000 kΩ) and a capacitor (C=1μF) connected in series. This configuration is connected in series to a battery with an emf of 10 V. Find the maximum voltage in [V] across the capacitor. Find the maximum charge on the capacitor in [µC]. How long will it take until the capacitor has a potential difference of 5 V?
Answer:
Following are the responses to the given choices:
Explanation:
The maximum pressure is 10 V from across condenser.
The highest charge mostly on condenser.
[tex]vc = 10\times 1\ mf\\\\[/tex]
[tex]= 10^{-5}\ C[/tex]
The time it takes for the condenser to be 5 V different.
[tex]time = ln_2 \times 1000 \times 1mf[/tex]
[tex]=0 .69 \times 10^{-3}\ sec[/tex]
_______________________, _____________________, and _________, can help children prevent overweight and obesity. Obesity costs the US healthcare system $147 billion per ________.
Answer:
A.) healthy eating behaviors,
B.) regular physical activity,
C.) reduced sedentary activity
D.) year
Explanation:
healthy eating behaviors, regular physical activity, and reduced sedentary activity can help children prevent overweight and obesity.
Obesity costs the US healthcare system $147 billion per year.
If the wavelength of an s-wave is 23,000 m, and its speed 4500 m/s, what is its frequency?
Answer:
5 metre.
Explanation:
Wavelength = Velocity / Frequency
= 23,000/ 4,500
= 5 metre.
Can sugar molecules produced from photosynthesis be rearranged into different compounds carry out life process
Answer:
Yes, the sugar molecules produced from photosynthesis can be rearranged into different compounds to carry out life processes such energy producing compounds, energy storage compounds, body building compounds, and compounds of other types of food
Explanation:
a) The sugar can be broken down in a plant cell to produce ATP and then energy through cellular respiration as follows;
C₆H₁₂O₆ + O₂ 6CO₂ + 6H₂O + ATP
The produced energy can be used as power for cellular activities, such as the synthesis of protein and cell division
b) The produced sugar can be linked together by enzymes to form starch which is a form of chemical storage of energy as follows;
Sugar C₆H₁₂O₆ transformed into starch (C₆H₁₀O₅)ₙ
c) The sugar can be used in building the plant body by forming cellulose which is a form of starch
d) The sugar can be transformed into proteins and fat which are other types of food such as compounds containing sugar produces compounds containing fat based compounds
El potencial electrico debido a una carga en un punto P es de 45 000 V. Si la magnitud de la carga es 4x10-6C. A que distancia esta el punto P de la cartga
Answer:
0,8 m
Explanation:
Recordemos que el potencial eléctrico V se da como
V = q / 4πεod
Dónde;
q = cantidad de carga
εo = permitividad del espacio libre
d = polvo de separación
Pero;
1 / 4πεo = 9 * 10 ^ 9
Entonces;
V = 45 000 V
q = 4x10-6C
45.000 = 9 * 10 ^ 9 * 4x10-6 / d
d = 9 * 10 ^ 9 * 4x10-6 / 45,000
d = 0,8 m
Which of the following are true about electrons? a.) They are positively charged b.) They are negatively charged c.) They are found inside the nucleus d.) a & c
Answer:
A and C
Explanation:
BRAINLIEST PLS
Answer:
b
Explanation:
The answer is b.. because the charge of electrons is opposite to that of protons.. the combination of the equal number of protons and electrons has a total charge of zero(0)....