The speed of a car increases uniformly from 6 m/s to 42 m/s in 9 second calculate the acceleration of the car​

As stream discharge increases, only velocity increases.

The discharge or volume flow rate is defined as the product of the velocity of the fluid and the area of cross- section of the pipe or tube.

Discharge Q = Area A x Velocity V

Q = AV

The discharge is directly proportional to the velocity of the fluid. When discharge increases, velocity is the only physical quantity that can be changed.

Thus, As stream discharge increases, only velocity increases.

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Answer: Up

Explanation:

Answer:

a. the light diverges when it passes through the lens.

Explanation:

All the light rays after passing through the concave lens diverge and when produced backwards appear to meet at a point on the principal axis of the lens. This point is known as principal focus of a concave lens.

Earth's core is composed of iron and nickel is the correct statement about earth's core.

Earth's magnetic field is generated by the solidification of the planet's liquid iron core. The cooling and crystallization of the core moves the surrounding liquid iron that creates powerful electric currents that generate a magnetic field.

So we can conclude that Earth's core is composed of iron and nickel.

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Answer:

There is a net force of 2 N to the left.

With 8 N to the left the up/down and left/right forces are in balance.

The force left over is 2 N to the left.

A Personality test is said to be reliable because (A). a reliable test will give consistent results over time.

Personality test can be defined as a test that can be used to verify or ascertain an individuals personality.

Personality test is a test that is carried out by different organizations to help to help them know the individuals in that organization and to help others know how to relate and work with them.

In conclusion, A Personality test is said to be reliable because a reliable test will give consistent results over time.

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Answer:

a.

Explanation:

Explanation:

s = ?           u = 0m/s        v = ?         a = 5m/s²        t = 2s

v = u + at                  

  = 0 + (5 x 2)              

  = 10 m/s                    

s = ut + 1/2 at²

= (0)(2) +  x    [tex]\frac{1}{2}[/tex]  x 5 x 2²

= 10 m

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The sum of the maximum voltages across each element in a series RLC circuit is usually greater than the maximum applied voltage because voltages are added by vector addition.

Kirchhoff's loop rule states that the algebraic sum of potential differences, as well as the voltage supplied by the voltage sources and resistances, in any loop must be equal to zero.

In a series RLCcircuit, the voltages are not added by scalar addition but by vector addition.

Kirchhoff's loop rule is not violated since the voltages across different elements in the circuit are not at their maximum values.

Therefore, the sum of the maximum voltages across each element in a series RLC circuit is usually greater than the maximum applied voltage because voltages are added by vector addition.

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The spring constant of the spring if it would compress by 1 m to stop the ore car is 340,350.4 N/m.

The potential energy of the car is calculated as follows;

P.E = mgh

where;

sin (10) = h/L

h = L x sin(10)

P.E = mgLsin(10)

P.E = 2000 x 9.8 x 50 x sin(10)

P.E = 170,175.21

The potential energy of the car at the top of the incline will be converted  to the elastic potential energy spring at the bottom of the incline.

P.E = U = ¹/₂kx²

k = (2U)/x²

k = (2 x 170,175.2)/(1)²

k = 340,350.4 N/m

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The height of the chairlift above the snow when the ski falls off is determined as 20.4 m.

The height of the chairlift is calculated from the principle of conservation of mechanical energy as shown below;

P.E = K.E

mgh = ¹/₂mv²

gh = ¹/₂v²

h = v²/2g

where;

h = (20)²/(2 x 9.8)

h = 20.4 m

Thus, the height of the chairlift above the snow when the ski falls off is determined as 20.4 m.

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Answer:

Explanation:

It apply on how you will protect the egg because you protect the egg at all cost. It's very similar on who is protecting you, You need someone to be there for you always because an egg can't survive on it's own. Just like your life your can't be always rolling around like an egg you need to be safe and always with the person who cares for you. An egg is safe when they are together in a tray just like family and friends.

361 cubic meters of habitable space was available in the skylab. None of the given options are correct.

NASA launched the first American space station, called Skylab.

The fuel tank of the Saturn SIV-B rocket stage served as the Skylab's residential quarters.

Skylab's livable capacity was large in comparison to the spacecraft that American astronauts had previously used 361 cubic meters.

Skylab offered 361 cubic meters of livable area.

Hence, none of the given options is correct.

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The total thermal power generated by this plutonium source is determined as 5.65 J/s.

The total thermal power generated by this plutonium source is determined as follows;

ΔP = Eλ

where;

ΔP = (5.6 mev) x (6.3 x 10¹⁵ s⁻¹)

ΔP = (5.6 x 10³ x 1.6 x 10⁻¹⁹ J) x (6.3 x 10¹⁵ s⁻¹)

ΔP = 5.65 J/s

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According to Newton's second Law of motion, if the mass of an object is 10 kg and the force is 10 newtons, then the acceleration is 1m/s².

The acceleration of a moving body can be calculated by dividing the force of the body by its mass.

According to this question, the mass of an object is 10 kg and the force is 10 newtons, then the acceleration can be calculated as follows:

acceleration = 10N ÷ 10kg

acceleration = 1m/s²

Therefore, according to Newton's second Law of motion, if the mass of an object is 10 kg and the force is 10 newtons, then the acceleration is 1m/s².

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(a) The spring stiffness constant of the spring is 18,392 N/m.

(b) The time the car was in contact with the spring before it bounces off in the opposite direction is 0.23 s.

The kinetic energy of the car is calculated as follows;

K.E = ¹/₂mv²

K.E = ¹/₂ x 950 x 22²

K.E = 229,900 J

The stiffness constant of the spring is calculated as follows;

K.E =  U = ¹/₂kx²

k = 2U/x²

k = (2 x 229,900)/(5)²

k = 18,392 N/m

F = kx

F = 18,392 x 5

F = 91,960 N

F = mv/t

t = mv/F

t = (950 x 22)/(91960)

t = 0.23 s

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Answer:

The balloon shrank because the average kinetic energy of the gas molecules in a balloon decreases when the temperature decreases. This makes the molecules move more slowly and have less frequent and weaker collisions with the inside wall of the balloon, which causes the balloon to shrink a little.

Explanation:

Not only does it shrink in cold water but it shrinks in the cold itself.

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Answer:

chemical energy is converted to electrical energy in a voltaic cell.

Answer:

Option C

Explanation:

According to the formula

So

If we use wide wire we increase the area of cross section so resistance decreases

Answer:

Explanation:

the action or fact of showing an abstract idea.

(◑.◑)!

Manifestation (or manifesting) refers to

various pseudoscientific self-help

strategies intended to burning about

a personal goal, primary by focusing

one's thought upon the desired outcome.

The techniques are based on the law

of attraction of New Thought spiritually.

While the process involves positive

thinking, or even directing request to

"the universe", it also involves

action-steps on the part of the individual.

Manifestation has been criticised as

having no basis in physical science.

Alison Bernstein, a professor of

translational neuroscience at Michigan

State University said in an interview

with Vice that "You can't magically

make things happen. You can [However]

change the way you react to certain

situations, which sounds to me like

Cognitive Behavioral Therapy". She

want no to assert that "manifestation

is not supported by science.

No, a species niche cannot be influenced by interspecific competition. Details about niche can be found below.

The niche of an organism in an ecosystem refers to the function within an ecological system to which an organism is especially suited.

Interspecific competition is the competition for resources between species of different organisms.

Niche of an organism is specific to that organism and this enables it avoid competition for resources in the environment.

This suggests that a species niche cannot be influenced by interspecific competition.

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The stone on the celestial body will be 50 N in weight. When the mass of a celestial body equals half of the mass of the earth.

The mass of the body is defined as the amount of matter a body has. It is denoted by m and its unit is kg.

Weight is defined as the amount of force an object exerts on the surface. It is given as the product of mass and the gravitational pull.

Given data:

[tex]\rm m_h = \frac{1}{2} m_E[/tex]

[tex]\rm r_h=\frac{1}{2} r_E[/tex]

[tex]\rm W_E = 100 \ N[/tex]

The weight of the body on earth is found as;

[tex]\rm W_E = m_Eg[/tex]

Substitute all the values:

[tex]\rm W_E = m_Eg \\\\\ 100 \ N = 2 m_hg \\\\ m_hg =50 \ N \\\\ W_h = 50 \ N[/tex]

Hence, the weight of the stone on the heavenly body will be 50 N.

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Answer:

The answer would be A

Explanation:

Answer:

5.775 m/s

Explanation:

radial acceleration = velocity / radius

=> velocity = radial acceleration * radius

=> v = 3.5 * 1.65 = 5.775 (m/s)

Answer:

P = E / t       definition of power is energy / unit time

1 W = 1 Joule / sec      definition of 1 Watt of power

E = 2.6E4 J/s * 30 s = 7.8E5 Joules = 780,000 Joules

The average power transferred to the solar panels by sunlight is 26 000 w. The average energy transferred to the solar panels in 30 seconds is 780,000 joules.

To calculate the average energy transferred to the solar panels in 30 seconds, we can use the equation:

Energy transferred = Power × Time

Given that the average power transferred to the solar panels is 26,000 watts and the time is 30 seconds, we can substitute these values into the equation:

Energy transferred = Power × Time

Energy transferred = 26,000 × 30

Energy transferred = 780,000 watt-seconds

Since the watt-second is equivalent to the joule (J), the energy transferred to the solar panels is 780,000 joules.

Therefore, the average energy transferred to the solar panels in 30 seconds is 780,000 joules.

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The acceleration of the snail will be 7/13 m/sec². The acceleration is found as the rate of change of the velocity.

The rate of change of velocity with respect to time is known as acceleration. According to Newton's second law, the eventual effect of all forces applied to a body is its acceleration.

The given data in the problem is;

v(t)=1.4ln(1’t²) inches per minute

0<t<15 minute

Acceleration is found as;

[tex]\rm v('t)=1.4 \times \frac{1}{1+t^2} (2t)[/tex]

Acceleration at t= 5 minute;

[tex]\rm v'(5)=\frac{1.4(2)(5)}{1+5^2} =\frac{14}{26} \\\\ v'=\frac{7}{13}[/tex]

Hence, the acceleration of the snail will be 7/13 inch per square minute.

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Atoms cannot be broken down into smaller pieces is the statement belongs to daltons atomic theory. Option B is correct.

The atom consists of matter that may be split without releasing electrical charges. It's also the smallest unit of matter with chemical element features.

The complete question is:

"Which statements belong to Dalton's atomic theory? Select all that apply.

A)Atoms cannot be created or destroyed.

B)Atoms cannot be broken down into smaller pieces.

C)All atoms of an element are identical.

D)Chemical reactions cause atoms to be rearranged."

According to Dalton's atomic hypothesis, atoms cannot be broken down into smaller bits.

Hence, option B is correct.

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