Answer:
The heat energy required to raise the temperature from 20°C to 85°C is 1.46x10^4J
A student shakes a rope such that 20 complete vibrations are made in 4.00 seconds. Determine the vibrational frequency of the rope, along with the corresponding unit.
Answer:
The vibrational frequency of the rope is 5 Hz.
Explanation:
Given;
number of complete oscillation of the rope, n = 20
time taken to make the oscillations, t = 4.00 s
The vibrational frequency of the rope is calculated as follows;
[tex]Frequency = \frac{number \ of \ complete \ vibrations}{time \ taken} \\\\Frequency = \frac{20 }{4 \ s} \\\\Frequency = 5 \ Hz[/tex]
Therefore, the vibrational frequency of the rope is 5 Hz.
Amy pulls a spring with a spring constant k = 100 stretching it from its rest length of 0.10 m to 0.2
Answer:
Elastic potential energy E = 0.5 J
Explanation:
Let us assume we have to find the elastic potential energy stored in the spring.
Given: k = 100
change in the length of the spring x = 0.2-0.1 = 0.1 m
Elastic potential energy
E = [tex]\frac{1}{2} kx^2[/tex]
plugging the values we get
[tex]E = 0.5\times100\times0.1^2\\=0.5 J[/tex]
Hence, Elastic potential energy E = 0.5 J
Amy pulls a spring with a spring constant k = 100 N/m, stretching it from its rest length of 0.10 m to 0.20 m.
What is the elastic potential energy stored in the spring?
Answer: 0.5 J
Which is the correct answer
Answer: E
Explanation: I looked it up and it said E.
IF ITS RIGHT YOU WILL GET 5 STARS AND A BRAINLY WITH A LIKE
Answer:
DNA IS SMALLEST
NUCLEUS IS BIGGEST
PLEASE MARK BAiniRINIiEST
Increasing the force acting on an object increases its acceleration.
a. TRUE
b. FALSE
TRUEefffffffffffffffffffffffffffff
Explanation:
An object with a mass of 10 kg is accelerated upward at 2 m/sec2. What force is required?
Answer:
Answer: Given m = 10 kg and . F = 20 N. Thus, the force required to accelerate the object upward direction is 20 N.
Explanation:
Answer: Given m = 10 kg and . F = 20 N. Thus, the force required to accelerate the object upward direction is 20 N.
(please help i gotta turn this in a few minutes 10 points!)
Match the planet to its description.
1.
Mercury
2.
Venus
3.
Mars
4.
Earth
a.
Iron oxide causes the red color of its soil
b.
Has the hottest recorded surface temperatures of the solar system
c.
Liquid water covers more than 70% of its surface
d.
Is a rocky planet with extreme temperature changes
Answer:
3a, 2b,4c,1d
Explanation:
what do I need to explain just something you know
HELP
Which type of wave interaction is shown in the photo?
A. Interference
B. Refraction
C. Reflection
D. Diffraction
Answer: the answer is c (think bc im on that too)
Explanation:
The interference is a type of wave interaction shown in the photo. Option A is correct.
What is the interference of waves?The result of two or more wave trains flowing in opposite directions on a crossing or coinciding pathways. This phenomenon is known as the interference of waves.
The effect is the sum of the individual wave amplitudes at each site where more than one wave is present.
When two wave pulses are traveling along a string toward each other. They meet and the phenomenon is occur known as interference.
The interference is a type of wave interaction shown in the photo
Hence option A is correct.
To learn more about the interference of waves refer to the link;
brainly.com/question/16098226
Someone please help me figure this out
Answer:
the answer is A
Explanation:
hope this helps you will u plz mark me sa brainliest?
According to our textbook, we now have over __ billion people living on our planet
1. Define speed
2. Define velocity
3. What is the formula for average speed and velocity
4. What are the three main units of measurement for speed?
5. What is acceleration on a distance time graph
6. What is speed on a distance time graph
7. What is no motion on a distance time graph
8. Define average speed
9. Give an example of velocity units
10. Describe velocity on a distance time graph
11. Give three examples of acceleration
12. Give an example of acceleration units
sorry it says some physics it doesn't give me science as a subject choice
Answer:
1. speed is the distance travelled by an object in unit time
2. velocity is the displacement of a body in in unit time
3. formula of speed =total distance (d)÷ total elapsed time
Un automóvil de 14.500 kg es acelerado gracias a la fuerza de su motor, la que le imprime 21.750 N. Calcular la aceleración del auto.
What cell organelle stores water for plant cells is it a Large Vacuole or small
Answer:
plant cell's vacuole can make up 90% of the cell's volume. The large central vacuole essentially stores water. In animal cells, vacuoles are much smaller
An aircraft is moving horizontally with a speed of 50m/s, at the height of 2km, an object is dropped from the aircraft. What is the vertical and horizontal velocity of an object if the angle is 23 degrees and the time interval for the object hits the ground?
Explanation:
use the diagram^
horizontal velocity of the object nvr changes, it'll stay 50m/s till it hits the ground
initial vertical velocity = 0
to find the final vertical velocity, use the formula:
[tex]v {}^{2} = u {}^{2} + 2as[/tex]
where u = 0m/s, a = 9.8m/s², and s = 2000m
solve for v.
for time taken to reach ground, use the formula:
[tex]v = u + at[/tex]
where v = the value for v u calculated above, u = 0 m/s, a = 9.8m/s² and solve for t.
how much force is required to accelerate a 50 kg mass at 2 m/s
Answer:
F = 100 Newtons
Explanation:
F = ma
F = (50 kg)(2 m/s)
F = 100 kg*m/s
How is a plant able to cycle matter through the processes of cellular respiration and photosynthesis?
The carbon cycle refers to the processes by which carbon in the biosphere is recycled. Photosynthesis sucks carbon dioxide out of the atmosphere, while cellular respiration releases it into the environment. Photosynthesis is the process by which solar energy reaches a plant and is converted into glucose.
How photosynthesis and cellular respiration are similar:
Photosynthesis is a method by which plants and other organisms transform light energy into chemical energy, which is then released to fuel the organism's metabolic activities through cellular respiration.
true or false? Most forces occur in pairs, such as when
you push against the floor with your
feet, the floor pushes back on your feet,
but there are a few exceptions where a
single force can occur without being in
an interaction of two forces.
An object moves from point A to B to C to D and finally to A
along the circle shown in the figure below.
a) Find the distance covered by the moving object.
b) Find the magnitude of the displacement of the object.
Answer:
a) The distance covered by the moving object is approximately 18.85 km
b) The magnitude of the displacement of the object is 0 (no displacement)
Explanation:
From the drawing, we have;
The sale of the drawing is 1 unit = 1 km
The radius of the circle in the drawing along which the object moves = 3 units
Therefore;
The radius of the circle along which the object moves, r = 1 km/unit × 3 units = 3 km
a) The distance covered by the object that moves from point A to B to C to D and finally to A is equal to the circumference of the circle
Therefore;
The distance covered by the moving object, d = 2·π·r
By pugging the value for r = 3 km
d = 2 × π × 3 km = 6·π km ≈ 18.85 km
The distance covered by the moving object, d ≈ 18.85 km
b) The displacement = The object's change in position
The initial position of the object = Point A
The final position of the object = Point A
Therefore, the displacement of the object, A = No displacement = 0 (No difference between the initial and final location of the object
14. A light bulb has a resistance of 8 ohms and a maximum current of 10 A How much voltage can
be applied before the bulb will break?
Answer:
80 volts.
Explanation:
From the question,
Applying Ohm's law
V = IR...................... Equation 1
Where V = Voltage, I = maximum current of the bulb, R = Resistance of the bulb.
Given: I = 10 A, R = ohms
Substitute these values into equation 1
V = 10×8
V = 80 volt.
Hence the voltage that can be applied is 80 volt.
Blue-ray disc accelerates from rest to a constant rotational speed of 466 rpm, it rotates through an angular displacement of 0.250 rev. What is the angular acceleration of the CD?
Answer:
[tex]\alpha =434312\ rev/s^2[/tex]
Explanation:
Given that,
Initial angular speed, [tex]\omega_i=0[/tex]
Final angular speed, [tex]\omega_f=466\ rpm[/tex]
Angular displacement, [tex]\theta=0.25\ rev[/tex]
We need to find the angular acceleration of the CD. Using third equation of rotational kinematics as follows :
[tex]\omega_f^2-\omega_i^2=2\alpha \theta\\\\\alpha =\dfrac{\omega_f^2-\omega_i^2}{2\theta}\\\\\alpha =\dfrac{466^2-0^2}{2\times 0.25}\\\\\alpha =434312\ rev/s^2[/tex]
So, the angular acceleration of the CD is equal to [tex]434312\ rev/s^2[/tex].
Choose the correct answer?
Answer:
B
Explanation:
Dimas reads that it takes 270 N to lift a firefighter's equipment. If a firefighter does 5400 J of work carrying the equipment up a staircase, how high does the firefighter climb? (Work: W = Fd) 20 m 200 m 5130 m 1,458,000 m
Answer:
h = 20 m
Explanation:
Given that,
Force to lift a firefighter's equipment, F = 270 N
Work done, W = 5400 J
We need to find the height climbed by the firefighter. We know that,
Work done, W = Fd
So,
[tex]d=\dfrac{W}{F}\\\\d=\dfrac{5400}{270}\\\\d=20\ m[/tex]
So, the firefighter climb from a height of 20 m.
Answer:
Its A
Explanation: I got it right on Edge *lip bite*
Which best describes what the observations have in common? They involve nuclear energy. They involve radiant energy. They involve changes in waves. They involve changes in energy.
Answer:
The answer is "They involve changes in energy".
Explanation:
Energy change is quite important in chemicals because nearly all reactions involve activation energy. They will learn and learn how to utilize different types of energy shifts in the steam cycle. A conversation about what drives chemical processes contributes to entropy and natural energy principles. It may shift from the shape of form. For example, chemicals might change to heat. Laser light can turn substances into power. Its energy can be changed into different kinds, but not wasted or produced.
Answer:
D
Explanation:
change in energy please give brainliest (edge 2021)
What would happen to the two balls if one of them were kept positively charged and the charge on the other ball were slowly increased, making it more and more positive? View Available Hint(s) What would happen to the two balls if one of them were kept positively charged and the charge on the other ball were slowly increased, making it more and more positive? The balls would begin to move closer together. The balls would not move relative to each other. The balls would begin to move farther apart.
Answer:
the balls would move closer to each other
Explanation:
The density of red wood is 15.27 g/cm'. A piece of red wood has the volume of 18.721 cm', what is the
mass?
GIVING BRAINLIEST PLEASE HELP!!
-if you answer correctly ill give you brainliest which will give you 25pts-
Answer:
D. Wind
Explanation:
Wind is Basically nothing how can you even use wind again when you cant even touch it you can only feel wind.
Q1) Calculate the gravitational force between two large trucks, each with a mass of 6500 kg, if
they are parked next to each other separated by a distance of 0.5 m Ignore all other
gravitational forces.
Answer:
F = 0.0112 N
Explanation:
Given that,
Masses, [tex]m_1=m_2=6500\ kg[/tex]
The distance between masses, d = 0.5 m
We need to find the gravitational force between two large trucks. The formula for the gravitational forces is given by :
[tex]F=G\dfrac{m^2}{r^2}\\\\F=6.67\times 10^{-11}\times \dfrac{6500^2}{(0.5)^2}\\\\F=0.0112\ N[/tex]
So, the required force between masses is equal to 0.0112 N.
Ligaments are important because they provide joints with:
A lubrication.
B cushioning.
C stability.
D flexibility
Answer:
the answer is B. it's too easy
You cannot classify matter based on chemical properties. true or false?
Answer:
ture i think
Explanation:
It is false that one cannot classify matter based on chemical properties.
What is a matter?Matter is the scientific term for any type of material. Matter is defined as anything with mass that occupies space.
Matter requires at least one subatomic particle, though most matter is made up of atoms. A pure substance is sometimes referred to as matter.
Solids, liquids, and gases are the three forms or phases of matter. A substance is defined as matter that is homogeneous and has identical parts.
Substances are classified as either elements or compounds. Elements are pure substances that cannot be chemically decomposed into simpler substances.
Chemically, matter can be classified as pure substance elements and compounds, mixture, or impure substance.
Thus, the given statement is false.
For more details regarding matter, visit:
https://brainly.com/question/10893210
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Which has a higher momentum, a 3.5kg bowling ball that is rolling at 30
m/s or a 50 kg student moving at 1.75 m/s?
Answer:
The answer of this question
Explanation:
a3.5 kg blowing ball that is rolling at 30 m/s