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The period of a pendulum is independent of the mass of the bob so whether it's empty or filled with something, the period remains the same.

[tex]period = 2\pi \sqrt{ \frac{length}{g} } [/tex]

Answer:

V=IR

25. =0.5 ×RESISTANCE

RESISTANCE=25/0.5

=50 ohms

answer is option B

Answer:

The Challenges of Using Natural Resources

Extracting, processing and using natural resources can cause environmental problems such as: air, land and water pollution; disruption or destruction of ecosystems; and a decrease in biodiversity.

Answer:

F' = 2F

Explanation:

The gravitational force of attraction between asteroids is given by Newton's Law of Gravitation:

[tex]F = \frac{Gm_1m_2}{r^2}[/tex]

where,

F = Force

G = Universal Gravitational Constant

m₁ = m₂ = m = mass of each asteroid

r = distance between asteroids

Therefore,

[tex]F = \frac{Gm^2}{r^2}[/tex]   --------------------- eq(1)

Now, if we double the mass of one asteroid:

[tex]F' = \frac{G(2m^2)}{r^2} \\\\F' = 2\frac{Gm^2}{r^2}[/tex]

using equation (1):

F' = 2F

Answer:

200km

Explanation:

Use the formula Distance = speed × time ( transpose the speed formula )

Also remember to converted the minutes into hour because the answer asked for it in Km do this by dividing by 60

d down

Explanation:

i don't have an explanation because my uncle answered this question

3) The answer is (b) -8 m/s (pointing down)

4) The answer is (c) -9.8 m/s^2 (acceleration of a freely falling object is always due to gravity, -9.8 m/s^2, regardless of direction)

Answer:

Electronegativity

Explanation:

Answer:

The property that determines an atom;s ability to attract electrons shared in a chemical bond is electronegativity.

Explanation:

Hope you have a great day :)

Answer: When the temperature of an object increases, the average kinetic energy of its particles increases. When the average kinetic energy of its particles increases, the object's thermal energy increases. Therefore, the thermal energy of an object increases as its temperature increases.

Answer: 2.925

Explanation: :)

Answer:

2.925

Explanation:

Explanation:

Answer:

the average velocity of the ball is 5 m/s.

Explanation:

Given;

initial position of the ball, x₁ = 12 m East

final position of the ball, x₂ = 8 m West

initial time of motion, t₁ = 10.0 s

final time of motion, t₂ = 6.0 s

The average velocity is calculated as follows;

[tex]v = \frac{\Delta x}{\Delta t} = \frac{x_1 \ - \ x_2}{t_1 \ - \ t_2}[/tex]

let the Eastward direction be positive

Let the westward direction be negative

[tex]\frac{x_1 \ - \ x_2}{t_1 \ - \ t_2} = \frac{12 \ - \ (-8)}{10 -6}= \frac{20}{4} = 5 \ m/s[/tex]

Therefore, the average velocity of the ball is 5 m/s.

Explanation:

P = IV

V = 240

I = 20

P = ?

P = 240 × 20

P = 4800 watts

Hydrogen is a very reactive gas, and the alkali metals are even more reactive. In fact, they are the most reactive metals and, along with the elements in group 17, are the most reactive of all elements.

Answer:

Explanation:

true

Answer:

n = 1.6

Explanation:

The formula for the calculation of the absolute index of refraction is given as follows:

[tex]n = \frac{c}{v}[/tex]

where,

n = index of refraction

c = speed of light in vacuum = 3 x 10⁸ m/s

v = speed of light in the piece of plastic = 1.87 x 10⁸ m/s

Therefore,

[tex]n = \frac{3\ x\ 10^8\ m/s}{1.87\ x\ 10^8\ m/s}[/tex]

n = 1.6

Answer:

temporary iron r made up of soft iron its " true.."

Answer:

1Kilowatt =1000watts

Now

Energy =Power x time

We need our power in Kilowatt and Our time in hours

Given

Power = 1200Watt

Divide this by 1000... To get its value in Kilowatt

Power = 1.2kilowatt

Time=6min

Divide by 60 to get its value in hours

Time = 6/60hr = 0.1hrs

Energy = 1.2kilowatt x 0.1hrs

=0.12kilowatt hours

Answer:

C

Explanation:

the rest are in the respiratory system.

Answer:

C. kidney

Explanation:

respiratory system means an organ that helps you to breathe a nose,lungs,trachea are an organ to help you breathe. However, Kidney is not, this is because the kidney is in the urinary system which means to eliminate waste from the body. The urinary system also includes bladder, ureters, urethra.

Answer:

θ = 39.8°

Explanation:

Her, we will use the trigonometric ratio of the tangent to find the launch angle of the projectile from the vertical:

[tex]tan\ \theta = \frac{v_y}{v_x}[/tex]

where,

θ = launch angle from the vertical = ?

vy = vertical component of velocity = 5 m/s

vx = horizontal component of velocity = 6 m/s

Therefore,

[tex]tan\ \theta = \frac{5\ m/s}{6\ m/s}\\\\\theta = tan^{-1}(0.8333)[/tex]

θ = 39.8°

Answer:

The pressure value changes 400 % relative to the initial value.

Explanation:

Let suppose that the gas behaves ideally and represents a closed system, that is, a system with no mass interactions so that number of moles is conserved ([tex]n[/tex]). Since the variables involved in the isothermal process are pressure ([tex]P[/tex]) and volume ([tex]V[/tex]). Finally, the process is represented by the following relationship:

[tex]P_{1}\cdot V_{1} = P_{2}\cdot V_{2}[/tex] (1)

Where:

[tex]P_{1}, P_{2}[/tex] - Initial and final pressures.

[tex]V_{1}, V_{2}[/tex] - Initial and final volumes.

If we know that [tex]P_{1} = P_{o}[/tex], [tex]V_{1} = V_{o}[/tex] and [tex]V_{2} = 0.2\cdot V_{o}[/tex], then the final pressure of the closed system is:

[tex]P_{2} = P_{1}\cdot \left(\frac{V_{1}}{V_{2}} \right)[/tex]

[tex]P_{2} = 5\cdot P_{o}[/tex]

The pressure value changes 400 % relative to the initial value.

The capacitance of the capacitor if the dielectric constant of the paper is 3.7 :  18 nF

Given data :

Thickness of aluminium capacitor = 0.022 mm

Number of sheets = 500

Thickness of ream = 5.5 cm = 0.055 m

measurement of sheets = 0.216 m by 0.279 m

dielectric constant ( k ) = 3.7

we will apply the capacitance formula below

C = Kε₀A / d

  = 3.7 * 8.85*10⁻¹² * 0.216 *0.279 / ( 0.055 / 500 )

  = 1.8 * 10⁻⁸F ≈ 18nF

Hence we can conclude that The capacitance of the capacitor if the dielectric constant of the paper is 3.7 :  18 nF

Learn more about Capacitance : https://brainly.com/question/13578522

Answer:

The efficiency is just 0.016

Explanation:

The efficiency is given by the useful energy ÷ by the total energy.

1 W is the same that 1 joule per second

If you do the math:

1.6/100=0.016

Answer:

P = 5sin(880πt)

Explanation:

We write the pressure in the form P = Asin2πft where A = amplitude of pressure, f = frequency of vibration and t = time.

Now, striking the middle-A tuning fork with a force that produces a maximum pressure of 5 pascals implies A = 5 Pa.

Also, the frequency of vibration is 440 hertz. So, f = 440Hz

Thus, P = Asin2πft

P = 5sin2π(440)t

P = 5sin(880πt)

Answer:

53.64 m/s

Explanation:

Applying,

a = (v-u)/t............. Equation 1

Where a = acceleration of the car, v = final velocity of the car, u = initial velocity of the car, t = time.

make u the subject of the equation

u = v-at............. Equation 2

From the question,

Given: a = -12 mph/s = -5.364 m/s², t = 10 seconds, v = 0 m/s (comes to stop)

Substitute these values into equation 2

u = 0-(-5.364×10)

u = 0+53.64

u = 53.64 m/s

Answer:

22

Explanation:

all the resistance numbers added together 2.0+6.0+10.0+4.0

resistance formula : v bettary = v1 + v2 + v3 ....

Answer:

interference affects analog more

Explanation:

Answer:

........

Explanation:

Answer:

I think the answer 1

Explanation:

im probably wrong too i dont know

Explanation:

Newton's law of universal gravitation states that the force of gravity affects everything with mass in the universe. Newton's law also states that the strength of gravity between any two objects depends on the masses of the objects and the distance between them