please help me with this!!!

Answer:

defraction

Explanation:

when light passes from a less dense medium(air) into a dense medium(water) the light rays bend towards the normal. This makes the coin look closer

Answer:

1.lunar eclipse- happen when Earths shadow block the sun light

2.solar eclipse-A solar eclipse occurs when a portion of the Earth is engulfed in a shadow cast by the Moon which fully or partially blocks sunlight

3. lunar and solar eclipses occur with about equal frequency. Lunar eclipses are more widely visible because Earth casts a much larger shadow on the Moon during a lunar eclipse than the Moon casts on Earth during a solar eclipse. As a result, you are more likely to see a lunar eclipse than a solar eclipse.

Explanation:

Answer:

The force that must be exerted at the other end is 102.08 N/m₂

Explanation:

Using Pascal's formula; P₁ = P₂

P₁ = F₁/A₁ = m*g/(πr²)

m = 1500 kg; g = 9.8 m/s², r = 24 cm = 0.24 m

P₁ = (1500 * 9.8)/(22/7 * 0.24 * 0.24)

P₁ = 81235 N/m²

P₂ = F₂/A₂

A₂ = πr² where π = 22/7; r = 2.00 cm = 0.02m

A₂ = 22/7 * 0.02 * 0.02 = 0.00126 m²

P₂  = F₂ / 0.00126 m₂

substituting in the formula  P₁ = P₂

81235 N/m² =  F₂ / 0.00126 m²

F₂ = 81235 N/m² * 0.00126 m²

F₂ = 102.08 N/m₂

Explanation:

Answer:Why does water stop flowing out of the top hole even before the water level falls ... Calculate pressure on the bottom of the pool due to the water. 3. ... 2. If the ratio of A2 to A1 was 100, what force would be required to lift a 10000 N car? ... A cylinder with a radius of 11 cm and a height of 3.4 cm has a mass of 10.0 kg. a.

Explanation:

Answer:

Use F = m*a

Explanation:

If you are given the mass of the two different bodies, you could rearrange these equations, plug in the mass of the unknown body to find the unknown force

Answer:

A :)

Explanation:

....................

Answer:

Shoukd be A

Explanation:

Weather reflects the short term conditions while climate is average for the certain location

The mechanical advantage of a machine is the factor by which it multiplies the force applied to the machine.

Answer:2kwh

Explanation:

Answer:

Ships can float because a ship is less dense than that of the water that it floats on.

Explanation:

Hope this helps!

If energy is conserved, then initial (PE + KE) = final (PE + KE). So, the correct option is A.

The law of conservation of energy states that, energy can neither be created nor be destroyed, but can be transformed from one form to another.

Here,

According to law of conservation of energy,

The total energy of an isolated system remains constant. That means, the total energy of the system in the initial state will be same as that in the final state.

The total mechanical energy is the sum of kinetic energy and potential energy.

TE = KE + PE

Therefore, the energy to be conserved in the system,

Initial TE = Final TE

So, Initial (KE + PE) = Final (KE + PE)

Hence,

If energy is conserved, then initial (PE + KE) = final (PE + KE).

To learn more about law of conservation of energy, click:

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#SPJ2

Answer:

13.7795276 Inches

Explanation:

Answer:

The answer of the question is False

Answer:Given A uniform horizontal beam with a length of 8.00 m and a weight of 200 n is attached to a wall by a pin connection ( allows rotation). Its far end is supported by a cable that makes an angle of 53 degrees with the horizontal. If a 600 n person stands on the beam at 2.00 m from the wall , find the tension in the cable

Now the force acting on the beam are the gravitational force of earth and weight attached to a wall is 200 N which acts at centre. Also force of person standing is 600 N and force exerted is r and tension is T , also torque due to r is zero because it acts at the pivot point. So r = 0

Torque due to tension in the rope is sin 53 x 8.00 x T.

Torque due to force is 2.0 m x 600 N

The weight of beam acts in the centre since the beam is uniform.

So we have

sin 53 x 8.00 x T - 2 m x 600 N - 4 x 200 N = 0

8 .00 x 0.8 x T = 1200 + 800

0.64 T = 2000 N-m

T = 2000 / 0.64

T = 312.5 N

Explanation:

The tension in the cable and the force exerted on the beam by the wall will be 312.5 N and 1200N respectively.

Force is defined as the push or pull applied to the body. Sometimes it is used to change the shape, size, and direction of the body. Force is defined as the product of mass and acceleration. Its unit is Newton.

The given data in the problem is;

L is the length 5.00 m long,

[tex]\rm \theta[/tex] is the angle of 53.0°

d is the distance =  1.50 m

T is the  tension in the cable

F is the force exerted on the beam by the wall= ?

Torque due to tension in the rope is

[tex]\rm \tau = 8.00 \times sin 53^0 \times T[/tex]

Force due to the torque will be;

F= 2.0 m x 600 N

F= 1200 N

The net tension is found as on applying the static equilibirium equation;

sin 53 x 8.00 x T - 2 m x 600 N - 4 x 200 N = 0

8 .00 x 0.8 x T = 1200 + 800

0.64 T = 2000 N-m

T = 2000 / 0.64

T = 312.5 N

Hence the tension in the cable and the force exerted on the beam by the wall will be 312.5 N and 1200N .

To learn more about the force refer to the link;

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Answer:

the law of force and accerleration

Explanation:

is the law where the acceleration of an object is directly related to the net force and inversely related to its mass

Answer:

0.5m

Explanation:

v=f×lamda

v is 300m/s, f is 600Hz, lamda is ?

lamda=v/f

lamda=300/600

lamda =3/6=1/2m

Answer:

True

Explanation:

I did this on a test and got it right, I swear

Answer:

radiation!

Explanation:

Answer: Radiation is the thermal transmission of heat energy across space.

Explanation:

Answer:

1.5 hour

Explanation:

Time = distance/speed

Time= 120/80 = 1.5 hour

Answer:

Gravitational Potential Energy

Explanation:

Answer:

The correct answer is Separating soils by grain size. Among all the other choices, this is the aspect of soil characteristics in which a soil triangle is used for.

Explanation:

Answer:

Native Americans should be allowed to use peyote in their religious rituals. The United States should not restrict access to peyote and should not interfere with the use of peyote in Native American rituals. Many religious communities use a substance that can cause a change in consciousness during their ceremonies, including Christian communities who use wine as part of their sacrament. Native Americans use the peyote responsibly and should not be restricted from its use.

Explanation:

yup

Answer:

Explanation:

given=

v = 5m/s

distance = 25m

time= distance/ speed = 25/5

T= 5

and frequency = 1/T

= 1/5 = 0.2 Hz

hope this will help you

Answer:

  v = 11.7 m / s

Explanation:

For this exercise we can use the conservation of energy

starting point. Where you drop the stone

          Em₀ = K + U = ½ m v² + m g h₁

final point. Point where the stone arrives

          Em_f = U = mgh₂

We are assuming that there is no friction, so the energy is conserved

          Em₀ = Em_f

          ½ m v² + m g h₁ = m g h₂

         v² = 2g (h₂-h₁)

let's calculate

         v² = 2 9.8 (17 - 10)

         v = √137.2

         v = 11.7 m / s

Answer:

P = 10 kPa

Explanation:

Given that,

The mass of a small table, m = 4 kg

The area of each leg = 0.001 m²

We need to find the pressure exerted by the table on the floor. Pressure is equal to the force per unit area. So

[tex]P=\dfrac{mg}{4\times A}\\\\P=\dfrac{4\times 10}{4\times 0.001}\\P=10000\ Pa\\\\or\\\\P=10\ kPa[/tex]

So, the required pressure is 10 kPa.

Answer:

Explanation:

Read forces directly from the graph.

Read displacements directly from the graph.

Use the area under the graph to find the work done by the force. This is equal to the kinetic or potential energy the object gains due to the application of the force.

Answer:

Choice C

Explanation: