Exercise releases chemicals in our bodies called

Answer:

Answer:

The value is \(v = 40.20 \ m/s\)

Explanation:

From the question we are told that

The radius is  \(r = 550 \ m\)

  The coefficient of static friction is \(\mu = 0.30\)

   Generally the maximum safe driving speed is mathematically represented as

        \(v = \sqrt{\mu * r * g }\)

=>     \(v = \sqrt{ 0.30 * 550 * 9.8 }\)

=>     \(v = 40.20 \ m/s\)

The velocity of Bob at 11 seconds is 4.27 m/s.

The velocity of Bob at 11 seconds is calculated by applying average velocity formula as shown below.

v = ( total displacement ) / ( total time )

v = ( X₃ + X₁₁ ) / ( 3 + 11 )

where;

4 = ( 9 + 11u ) / ( 14 )

where;

The velocity of Bob at 11 seconds is calculated as;

4 = ( 9 + 11u ) / 14

9 + 11u = 56

11u = 56 - 9

11u = 47

u = 47 / 11

u = 4.27 m/s

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Answer:

It is Nice A since it's temp increases slower

Explanation:

hope this helped

Answer:

132 N

Explanation:

Given that a  1.1 kg hammer strikes a nail. Before the impact, the hammer is moving at 4.5 m/s; after the impact it is moving at 1.5 m/s in the opposite direction. If the hammer is in contact with the nail for 0.025 s, what is the magnitude of the average force exerted by the hammer on the nail

From Newton 2nd law of motion,

Change in momentum = impulse.

Change in momentum = m( V - U )

Substitute all the parameters into the formula

Change in momentum = 1.1 ( 4.5 - 1.5 )

Change in momentum = 1.1 × 3

Change in momentum = 3.3 kgm/s

Impulse = Ft

That is,

Ft = 3.3

Substitute time t into the formula above

F × 0.025 = 3.3

F = 3.3 / 0.025

F = 132 N

Therefore, the magnitude of the average force exerted by the hammer on the nail is 132 N.

It takes approximately 28.3 days for the radioactive sample to decay from an initial activity of 1.07 x 105 Bq to an activity of 100 Bq.

The formula for radioactive decay is \(A = A0 * (1/2)^{(t/t1/2)}\) where: A is the final activity A0 is the initial activity is the time elapsed t1/2 is the half-life of the sample

In this problem, the initial activity A0 is given as 1.07 x 105 Bq and the final activity A is given as 100 Bq.

The half-life of the sample is given as 5.7 days.

Substituting these values into the formula, we get: \(100 = 1.07 \times 105 * (1/2)^{(t/5.7)}\)

Dividing both sides by 1.07 x 105, we get:

\(0.000934579 = (1/2)^{(t/5.7)}\)

Taking the natural logarithm of both sides, we get:\(-7.072737 = (t/5.7) * ln(1/2)\)

Dividing both sides by ln(1/2), we get:

\(t = -7.072737 \div ln(1/2) * 5.7t \approx 28.3\) days

Therefore, it takes approximately 28.3 days for the radioactive sample to decay from an initial activity of 1.07 x 105 Bq to an activity of 100 Bq.

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Answer:

However, those astronauts would experience a second spectacle: A solar eclipse caused by the Earth – the Sun disappearing behind the dark disc of the Earth. When Earth inhabitants witness a lunar eclipse, Moon inhabitants would, simultaneously be witnessing a solar eclipse.

Answer:

There will be no tides

Explanation:

Please find attached photograph for your answer. The answer is option a. 36

\(\implies F_1 < F_2\)

\( \implies F_{net} = F_2 - F1\)

\(\implies F_{net} = 42 -15\)

\(\implies \underline{ \boxed{ F_{net} = 27 \: N}}\)

The net force on the 4.0 kg box is 27 N towards EAST.

Answer:

I. don't. get. this. question

C. Demand increases

Pace increases

The average number of hurricanes per globally stands at 15 hurricanes per year due to excess heat built up in Earth’s atmosphere.

Hurricanes are huge storms produced in the tropics due to large amounts of water vapor present in the atmosphere from the ocean coupled with strong winds with devastating effects on land.

The activities of man such as burning of fossil fuels have resulted in increased build of heat in the atmosphere and warming of the oceans. This is known as global warming.

Due to global warming, on average, the number of hurricanes per globally stands at 15 hurricanes per year.

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The equation to calculate the approximate volume of Mercury (or any sphere) is:

V = (4/3)πr^3

Where V is the volume, π (pi) is a mathematical constant approximately equal to 3.14159, and r is the radius of the sphere.

Therefore, to calculate the approximate volume of Mercury, we can use the equation:

V = (4/3)π(1516)^3

\(E = \frac{K Q q }{ \sqrt[\frac{3}{2} ]{ R^{2} + x^{2} } }\)The magnitude of electic field at a distance 'a'  from the center of the ring is

\(E = \frac{K Q q }{ 2\sqrt{2} a^{2} }\)  where  K =  \(\frac{1 }{4 \pi }\)∈

a = radius of ring  

Q = uniform charge distribution over ring

q =  another point charge located at a distance a from centre of ring

We know that the electric field at distance x from the center of ring of radius R is given by

\(E = \frac{K Q q }{ \sqrt[\frac{3}{2} ]{ R^{2} + x^{2} } }\)

according tho the question the radius of ring is equal to distance of q from centre of the ring

substituting  R= a , x = a

we get

\(E = \frac{K Q q }{ \sqrt[\frac{3}{2} ]{ a^{2} + a^{2} } }\)

\(E = \frac{K Q q }{ \sqrt[\frac{3}{2} ]{ 2 a^{2} } } }\)

\(E = \frac{K Q q }{ 2\sqrt{2} a^{2} }\)

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Answer:

24 m

Explanation:

By applying the law of conservation of energy.

K.E = P.E

\(\dfrac{1}{2}kx^2 = mgh\)

By rearrangement;

\(\dfrac{k}{m} = \dfrac{2*g*h}{x^2}\)

where;

k = spring constant

m = mass of pebble

h = height reached

x = stretched length

\(\dfrac{k}{m} = \dfrac{2*9.8*6}{(20 \times 10^{-2})^2}\)

\(\dfrac{k}{m} =0.2940 \times 10^4\)

Since the drag force is negligible;

\(\dfrac{1}{2}kx^2 = mgh\)

\(h = \dfrac{k}{m}\dfrac{x^2}{g}\)

\(h = \dfrac{1}{2}\times 0.2940 \times 10^4 \times \dfrac{(40\times 10^{-2})^2}{9.8}\)

h = 24 m

The ball that correctly relates the kinetic energy of a ball is;  Ball C

The kinetic energy of an object is the energy generated by an object in motion ( i.e. object whose speed is greater than zero )

and the formula for Kinetic energy = 1/2 mv^2 .

Ball B :

mass = 4kg , speed = 8 m/s . kinetic energy = 130 J

K.E = 1/2 ( 4 * 8^2 )

      = 128 J   ( 130 J ≠ 128 J ) ( does not correctly relate the kinetic energy

Ball C :

mass = 5 kg, speed = 8 m/s , kinetic energy = 160 J

K.E = \(1/2*\) \(( 5 * 8^2 )\)

      = 160 J  ( 160 J = 160 J )  ( correctly relates the kinetic energy )

Hence we can conclude that The ball that correctly relates the kinetic energy of a ball is;  Ball C.

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Answer:

b=c or b,c

Explanation:

The maximum number of chips is 33,333

What is a chip?

A chip is a tiny but complex modules that store computer memory or provide logic circuitry for microprocessors.

We need to find the number of wafers that can be cut from a single crystal.

The crystal is 25cm and each wafer is 0.3mm. We perform division to get the number of wafers per crystal after getting everything into the same units. 25cm=250mm.

250mm/0.3mm=833.3333 wafers.

Each wafer yields 400 chips so we multiply 400 chips per wafer by 833.33 wafers to get 33,333 chips.

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Answer:

?

Explanation:

Answer:

The sun

Explanation:

if they get too close even the heat that radiates of of it would burn you or give sunburn bad and the sun is a shining ball of energy it is way to hot for a human to get close

Answer:

Below

Explanation:

0-1 sec descends at constant rate from 10 to 6 m

1-2 sec stops at 6m

2-3 sec descends at constant rate to 2 m

3-4 sec stops at 2 m

4-5 sec descends at another constant rate to 0 m

The magnitude of the resultant vector is obtained by finding the sum of two horizontal vectors and the sum of two vertical vectors. Thus, option C is correct.

The resultant vector is the single vector that has the same effect in the number of vectors collectively produced. The resultant vector in the horizontal and vertical direction is obtained by drawing a diagonal and hence by using the Pythagoras theorem.

To find resultant vector is obtained by finding the sum of two horizontal vectors and vertical vectors and then using the Pythagoras theorem.

Thus, the ideal solution is option C.

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Answer: ITS 1 TRUST ME MAN BYE K

Explanation: OK BYE TRUST YEAH

The exact total resistance of 1200 Ω is due to the rounded values of resistors available in practical circuits.

To determine the values of the resistors, we can use Ohm's Law:

Voltage (V) = Current (I) × Resistance (R)

Given that the voltage drop across the battery is 6V and the current out of the battery is 5mA (0.005A), we can calculate the total resistance:

Total Resistance (R_total) = Voltage (V) / Current (I)

R_total = 6V / 0.005A

R_total = 1200 Ω

Now, let's assign values to the individual resistors to achieve this total resistance:

R1 = 220 Ω

R2 = 470 Ω

R3 = 330 Ω

R4 = 680 Ω

R5 = 820 Ω

R6 = 350 Ω

With these values, the total resistance of the circuit would be:

R_total = R1 + (R2 || R3) + (R4 || R5) + R6

R_total = 220 Ω + (470 Ω || 330 Ω) + (680 Ω || 820 Ω) + 350 Ω

R_total ≈ 220 Ω + 214.8 Ω + 351.5 Ω + 350 Ω

R_total ≈ 1136.3 Ω

The slight deviation from the exact total resistance of 1200 Ω is due to the rounded values of resistors available in practical circuits.

Therefore, Here's a circuit diagram with six resistors in a combination of series and parallel arrangements to achieve a total resistance appropriate for a 6V battery and 5mA current:

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The center of mass of the system is at (2,2).

To find the center of mass, we need to use the formula:

Plugging in the given values, we get:

Therefore, the center of mass is located at (2,2).

The center of mass is a point in a system where the entire mass can be assumed to be concentrated. It is the average position of all the mass in the system, calculated by taking the weighted average of the positions of individual masses.

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The maximum height reached by the baseball is 31.89 m and the time taken to reach there is 1.3 seconds

Linear motions are straight line motions. It can be horizontal motion, or vertical motion which is motion under gravity.

Given that a baseball is hit almost straight up into the air with a speed of 25m/s estimate how high it goes.

At the maximum height, final velocity V = 0

Using third equation of motion, that is, V² = U² - 2gH, we can estimate how high it goes.

0 = 25² - 2 × 9.8 × H

625 = 19.6H

H = 625/19.6

H = 31.89 m

To know how long it is in the air, the factors that make this estimate will be

Speed = s / t

25 = 31.89 / t

t = 31.89 / 25

t = 1.2756

t = 1.3 s

Therefore, the maximum height reached by the baseball is 31.89 m and the time taken to reach there is 1.3 seconds

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Answer:

From the power source we have to buy only energy.

Explanation:

Energy is released when an electron loses potential energy as a result of the transfer from higher state to lower state.

Electricity is the movement of electrons between atoms and it doesn't means we can isolate the electrons from the atom and sell it. It remains the part of atom and hence only energy can be purchase form the power company.

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Inertia is the ability of the body to remain in the state or in uniform motion unless some external force acts on the body.

The inertia of the body is direly proportional to the mass of the body.

Thus, the greater the mass of the body greater is its inertia.

Three types of inertia:

In the state of rest, the inertia of the body resists the cause of motion. This inertia is known as resting inertia.

In the state of uniform motion, the inertia resists the cause of changing of motion. This inertia is known as motion inertia.

Some external force is applied to the body to change the direction of the motion of the body, the inertia that opposes this change in direction is known as directional inertia.

Weight of a body is defined as the force with which it is attached to the earth.

mass is the total quantity of matter present.

the weight of something is given as mass * acceleration

weight of an object is directly proportional to the mass of the object.  so, if mass doubles, weight will also double.

hope this helps :)

- jeron