(g) two masses mand m2(mı > m2) slide down a rough inclined surface of the same


length and inclination. which of the masses would be the first to get to the bottom? give


reasons for your answer.

Answer:

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\ \)

From the question we have

\(density = \frac{10.5}{19.3} \\ = 0.54404145...\)

We have the final answer as

Hope this helps you

Answer:

False

Explanation:

The point where the image gradually dilated is known as the center of dilatation (or point of dilation).

The dilation's centre is at the centre point. To calculate the lengths to the preimage as well as the dilation image, utilise the centre point. The scale factor was determined by these distances. Dilation A dilation would be a transformation that increases or decreases a figure's size.

The center of dilation as well as figure could be translated so that the origin will become the center, and then translated back to create a dilation with just about any point other than origin as the center.

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When you set the microwave to 30% power, it is actually cycling on and off at full power. The magnetron, which is responsible for producing the microwaves, is either turned on at 100% power or turned off completely for a certain amount of time. This allows the food to absorb the energy and cook more evenly.

Microwaves work by producing electromagnetic radiation that excites the molecules in food, causing them to vibrate and produce heat. The power output of the microwave determines how much energy is produced by the magnetron and how frequently it is cycled on and off. When you set the microwave to 30% power, the magnetron is turned on at full power for a short period of time and then turned off completely for a longer period of time. This cycle of on and off periods allows the food to absorb the energy and cook more evenly. It also helps prevent overcooking and ensures that the food is heated throughout. So, in essence, when you set the microwave to 30% power, it is still producing the same amount of energy as it would at full power, but it is being delivered in a more controlled and even manner.

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Answer: 78m/s  =A

u=0 ,a=3m/sec^2 ,t=25sec

v=u+at

=0+25×3

=75m/s

after 1sec

v=u+at+75

=0+3×1+75

=78m/s

Explanation:

u=0 ,a=3m/sec^2 ,t=25sec

v=u+at

=0+25×3

=75m/s

after 1sec

v=u+at+75

=0+3×1+75

=78m/s

Answer:

When we burn wood we are releasing solar energy, in the form of heat, that has been stored in the wood as chemical energy. The process of photosynthesis converted solar energy, water and carbon dioxide into oxygen and the organic molecules that form the wood, half the weight of which is carbon.

Explanation:

The value of the acceleration is 0.76 m/s² and the total time taken by the vehicle is 39 seconds.

The acceleration of the vehicle before coming to rest is calculated as follows;

v² = u² + 2as

where;

the car came to rest with constant velocity attained after 12 seconds.

the initial velocity of the car before 12 seconds is zero.

v² = 0 + 2as

a = v²/2s

a = (10²)/(2 x 66)

a = 0.76 m/s²

d = ut + ¹/₂at²

where;

580 = 0 + ¹/₂(0.76)t²

580 = 0.38t²

t² = 580/0.38

t² = 1,526.3

t = √1,526.3

t = 39 seconds

Thus, the value of the acceleration is 0.76 m/s² and the total time taken by the vehicle is 39 seconds.

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Answer:

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

\(a = \frac{f}{m} \\ \)

where

f is the force

m is the mass

From the question we have

\(a = \frac{200}{100} \\ \)

We have the final answer as

Hope this helps you

Answer:

Thermal energy can be transferred to one object to another in the form of heat. It causes molecules and atoms to collide with each other because of the rising of heat.

Explanation: Well thermal energy is a example of kinetic energy. It is heated by motion. It is heat that can be measured

The fluid's physical property that measures the fluid's resistance to flow is viscosity.

Fluid's viscosity is a physical property of fluids that measures the fluid's resistance to flow.

Fluid's viscosity decreases with increase in temperature and increases with increase in the intermolecular forces of the fluid.

Thus, the fluid's physical property that measures the fluid's resistance to flow is viscosity.

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for each of them you need to type how they make you feel when you like need to make decision

Explanation:

Explanation:

K=mgh\\1300=(7)(9.8)h\\h=19\ mK=mgh

1300=(7)(9.8)h

h=19 m

The tension should be increased to 24.6 N in order to  produce the correct frequency of 600 Hz

To calculate this, we can use the equation T = (2*L*F^2)/(A*C), where T is the tension, L is the length of the string, F is the frequency, A is the cross-sectional area and C is the linear density of the string. We can rearrange the equation to solve for T, which gives us T = (2*L*F^2)/(A*C). Plugging in our known values, we get T = (2*L*600^2)/(A*C). Then, we can solve for the new tension by substituting our original tension and frequency into T = (2*L*500^2)/(A*C) and solving for T. The answer is 24.6 N.

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If the string produces a sound at 500 Hz when under a tension of 20.5 N, what should the tension be to produce the correct frequency of 600 Hz?

The true statements about exomoons are:

A. Exomoons are likely to exist

D. Exomoons have been used as locations within science fiction stories

C. Exomoons must be only made of ice

A. Exomoons are likely to exist: It is believed that exomoons could exist in planetary systems beyond our own. While the detection and confirmation of exomoons remains a challenge, their existence is considered plausible based on the understanding of moon formation and the prevalence of exoplanets.

D. Exomoons have been used as locations within science fiction stories: Exomoons, being a fascinating concept, have captured the imagination of science fiction writers. They have been depicted in various stories and movies as intriguing and potentially habitable worlds.

E. Exomoons are moons that orbit exoplanets: An exomoon refers to a moon that orbits an exoplanet, which is a planet outside our solar system. Just like moons in our own solar system, exomoons are expected to orbit exoplanets, providing additional complexity and dynamics to the planetary systems.

C. Exomoons must be only made of ice: This statement is not true. Exomoons can be composed of various materials depending on their formation and composition. While some exomoons could have icy surfaces or subsurface oceans, others may be rocky or have diverse compositions.

It is important to note that our understanding of exomoons is still limited, and further research and observations are required to confirm their existence and study their characteristics.

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Answer:

-4.75

Explanation:

its right just trust me

Answer:

frequency = wavelength over speed. f. speed = wavelength x frequency

Explanation:

it is on google

Answer:wavelength=speed/frequency

Explanation:

Exactly at noon, as determined by the WWV time signal, on successive days of a week the clocks according to their relative value as good timekeepers, best to worst.

Time signals are also used in many everyday applications, such as GPS navigation, where precise timing is essential for calculating positions accurately.  A time signal refers to any signal that provides information about the passage of time. Time signals are often used in experiments to measure the duration of events or to synchronize the timing of multiple processes.

One common type of time signal is a periodic signal, which repeats itself at regular intervals. This can be used to measure the period or frequency of a phenomenon, such as the oscillation of a pendulum or the vibration of a guitar string. Another type of time signal is a pulse signal, which provides a brief burst of energy at a specific time. This can be used to trigger the start or stop of a process or to measure the time delay between different events.

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Answer:

Explanation:

Call the bike on the right A

Call the bike on the left B

The car begins it's time when it passes A

4 minutes later, it passes B.

But B has moved in 4 minutes and that is the key to the problem.

How far has B moved.

t = 4 minutes = 4/60 hours = 1/15 of an hour.

d = ?

rate = 30 km / hr

d = r * t

d = 30 km/hr * 1/15 hours = 2 km

The distance between the bikes is 5 km.

So the car has traveled 5 - 2 = 3 km

d = 3 km

r = ?

t = 4 minutes = 1/15 hour

r = d/t = 3/(1/15)= 3 / 0.066666666  = 45 km/hr.

Answer:

The change in pitch of a siren on an ambulance

Answer:

Explanation:

The drop in pitch of ambulance sirens as they pass by and the shift in red light are common examples of the Doppler Effect.

Yes, when a beam of light in the air is incident on a glass plate, the transmitted beam will emerge shifted laterally (sideways) from the direction of the incident beam.

When light travels from one medium to another, such as from air to glass, it undergoes a change in speed and direction due to the difference in refractive indices of the two media. This phenomenon is known as refraction. According to Snell's law, the angle of refraction depends on the angle of incidence and the refractive indices of the two media involved.

In the case of a beam of light incident on a glass plate, the change in direction occurs because light travels at different speeds in air and glass. As the light enters the glass, it slows down and changes its direction. When the transmitted beam emerges from the other side of the glass plate back into the air, it speeds up again and changes direction once more. This change in direction causes the transmitted beam to appear shifted laterally from the direction of the incident beam.

The lateral shift, also known as lateral displacement or transverse shift, is a result of the refraction process and is a characteristic behavior of light when it passes through a transparent medium with a different refractive index.

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Answer:

argon

Explanation:

an element's atomic number is its number of protons, and argon has 18 protons. it is also a noble gas, which has 8 valence electrons.

hope this helps!

After the dark wand touched the basket, The basket took on a negative charge, the charge was decreased. The dark wand stole electrons from the pail since it had a negative charge.

Charge is a fundamental property of matter that describes the electrical interaction between objects. It is a scalar quantity with units of Coulombs (C) in the SI system. There are two types of charges: positive and negative.

Positive charges have more protons than electrons and are attracted to negative charges. Negative charges have more electrons than protons and are attracted to positive charges. Objects with the same charge will repel each other.

Charge is conserved, meaning that the total charge in a system remains constant, even though the charge distribution can change. This is known as the law of conservation of charge.

Therefore, After the dark wand touched the basket, The basket took on a negative charge, and the charge was decreased. The dark wand stole electrons from the pail since it had a negative charge.

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Answer:

1.2 mph

Explanation:

14.4 ÷ 12 = 1.2

The absolute value of price elasticity of demand equals 2.50 if quantity demanded rises by 10 percent as price falls by 4 percent.

In economics, price elasticity of demand is used to measure the degree of responsiveness of the quantity of a product demanded with respect to its price. It is an essential measure for a business to determine the behavior of consumers towards changes in the price of its product.Price elasticity of demand formula is:Price elasticity of demand = (% change in quantity demanded) / (% change in price)From the given problem,Quantity demanded increases by 10% as price falls by 4%.

Mathematically, we can say that,% change in quantity demanded = 10%

= 0.1% change in price

= - 4%

= - 0.04

By substituting these values into the elasticity of demand formula, we get:Price elasticity of demand = (% change in quantity demanded) / (% change in price)Price elasticity of demand = 0.1 / (-0.04)Price elasticity of demand

= -2.5Taking absolute values, we get:

Absolute value of price elasticity of demand = 2.5

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Answer: 19 meters.

Explanation:

We want to find the total displacement between t = 2s and t = 4s.

To do it, we can integrate our function, first write our velocity equation.

for t ≤ 3s, we have a linear equation, let's write it:

A linear relationship can be written as:

y = a*t + b

where a is the slope and b is the y-axis intercept.

For a line that passes through the points (x1, y1) and (x2, y2), the slope can be written as:

a = (y2 - y1)/(x2 - x1).

Now we can see that our line passes through the points (1, 0) and (0, -2)

then the slope is:

a = (0 -(-2)/(1 - 0) = 2/1 = 2

and knowing that when t = 0s, v(0s) = -2m/s, then our equation is:

v(t) = (2m/s^2)*t - 2m/s for t ≤ 3s

now, for t ≥3s the equation is constant, v(t) = 4m/s.

then we have

v(t) = (2m/s^2)*t - 2m/s -------if t ≤ 3s

v(t) = 4m/s ----- if t ≥ 3s

Now we integrate over time to get the position:

for t ≤ 3s we have:

p(t) = (1/2)*(2m/s^2)*t^2 - 2m/s*t + C

where C is a constant of integration, as we are calculating the displacement  this constant actually does not matter, so we can use C = 0m

p(t) = (1m/s^2)*t^2 - 2m/s*t  for t ≤ 3s

and p(3s) =  (1m/s^2)*3s^2 - 2m/s*3s = 9m - 6m = 3m is the initial position of the other part of the function.

for t ≥ 3s we have:

p(t) = 4m/s*t + p(3s) = 4m/s*t + 3m

then the position equation is:

p(t) = (1m/s^2)*t^2 - 2m/s*t  ---- t ≤ 3s

p(t) = 4m/s*t + 3m --- if t ≥ 3s

Now the displacement will be:

p(4s) - p(2s) where for each time, you need to use the correct function:

p(4s) = 4m/s*4s + 3m = 16m + 3m = 19m

p(2s) =  (1m/s^2)*2s^2 - 2m/s*2s = 4m - 4m = 0m

p(4s) - p(2s) = 19m - 0m = 19m

The butterfly displacement x from t=2 to 4s is 19 meters.

The spacing between two specified points is represented by the one-dimensional quantity of displacement (symbolised as d or s), commonly known as length or distance.

The total displacement between t = 2s and t = 4s.

Integrate our function, the velocity equation.

for t ≤ 3s, we have a linear equation, let's write it:

A linear relationship can be written as:

y = a x t + b

where a is the slope and b is the y-axis intercept.

For a line that passes through the points (x1, y1) and (x2, y2), the slope can be written as:

a = (y2 - y1)/(x2 - x1).

The line passes through the points (1, 0) and (0, -2)

The slope is:

a = (0 -(-2)/(1 - 0) = 2/1 = 2

When t = 0s, v(0s) = -2m/s, then our equation is:

v(t) = (2m/s²) x t - 2m/s for t ≤ 3s

now, for t ≥3s the equation is constant, v(t) = 4m/s.

v(t) = (2m/s²) x t - 2m/s -------if t ≤ 3s

v(t) = 4m/s ----- if t ≥ 3s

Now we integrate over time to get the position:

for t ≤ 3s we have:

p(t) = (1/2) x (2m/s²) x t^2 - 2m/s x t + C

where C is a constant of integration, to calculate the displacement  this constant actually does not matter,

p(t) = (1m/s²)*t^2 - 2m/s x t  for t ≤ 3s

and p(3s) =  (1m/s^2) x 3s² - 2m/s x 3s = 9m - 6m = 3m is the initial position of the other part of the function.

for t ≥ 3s we have:

p(t) = 4m/s x t + p(3s) = 4m/s x t + 3m

then the position equation is:

p(t) = (1m/s^2) x t² - 2m/s x t  ---- t ≤ 3s

p(t) = 4m/s x t + 3m --- if t ≥ 3s

Now the displacement will be:

p(4s) - p(2s) where for each time, you need to use the correct function:

p(4s) = 4m/s x 4s + 3m = 16m + 3m = 19m

p(2s) =  (1m/s²) x 2s²- 2m/s x 2s = 4m - 4m = 0m

p(4s) - p(2s) = 19m - 0m = 19m

Thus, the displacement is 19 m.

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Answer: a. 2g/cm3

Explanation

density= mass/volume

60g/30 cm3 = 2 g/cm3

Answer:

50 kg

Explanation:

F = ma

250 N = m (5 m/s²)

m = 50 kg

Answer:

a.  Frequency is 5.45 x 10^14 hz

b.   The period = 1.8 x 10^-15 sec  {or 1.8 femptoseconds]

Explanation:

The velocity of an electromagnetic wave is given by the product of the wave's frequency(f) times its wavelength(λ).  

V = λ f     where,

V is the wave speed,

f is the wave frequency,

λ is the wavelength.

To find frequency, rearrange to:

f = V/ λ

Light travels at 3.00x10^8 m/sec.

λ is 5.50 x 10^-7 m

f = (3.00x10^8 m/sec)/(5.50 x 10^-7 m)  meters cancels, secs is on the bottom]

f = (3.00/5.50)*(10^15)  [The base 10 exponent on the bottom ius subtracted from the one on top:  98-(-7)) = 15)  

f = 0.545 x 10^15 1/s or hz

f = 5.45 x 10^14 hz

b.  The period of a wave is the inverse of it's frequesncy.  It is the time it takes for 1 wave to pass.  Invert the frequency:

 Period = 1/f

  Period =  1/(0.545 x 10^15 1/s)

Period = 1.8 x 10^-15 sec  {or 1.8 femptoseconds]