Generate Quiz 68B039AF8676A

A 25 percent drop in the ratio of carbon-14 to carbon-12 is equivalent to a 25 percent drop in the amount of carbon-14 because carbon-12 has an almost infinite half-life. Less than one half-life has passed if less than half of the carbon-14 has degraded. The sample is therefore younger than 5730 years. The question says that the ratio is 25% less than the ratio in nature, not 25% of the ratio in nature, which would correspond to choice (D). Pay attention to how you phrase this.

Visible light, a type of electromagnetic radiation, is the light that we can see. Its wavelength, which is visible to the human eye, is between 380 and 700 nm.

A body moving in an inertial frame of reference indicates that it is not being affected by any outside forces. Newton’s first law of motion states that unless an outside force acts upon the body, it will continue to move in such a situation at a constant speed, including zero velocity if it was initially at rest.

The rate at which velocity changes is called acceleration. The body’s velocity will stay constant in the absence of external forces, meaning that the rate at which velocity changes (acceleration) will also be zero.

Since the body maintains a constant velocity in the absence of outside forces, the correct response is A: zero acceleration.

The answer is as follows:

A ball experiences a change in momentum when it bounces off a wall and changes direction without losing any kinetic energy because its velocity reverses.

An object’s change in momentum (Δp) can be calculated by subtracting its initial momentum (pi) from its final momentum (pf):

Δp = pf – pi

where:

pf = the ball’s final momentum

pi is the ball’s initial momentum.

The ball’s final momentum (pf) will be -4.0 kg·m/s (opposite direction) if it bounces back with no kinetic energy lost from its initial momentum of +4.0 kg·m/s.

Determine the momentum change:

Δp is equal to (-4.0 kg·m/s). – (+4.0 kg·m/s)

Δp is equal to -8.0 kg·m/s.

Thus, the ball’s change in momentum will be -8.0 kg·m/s.

Given:

Charge(q)=2e-

3.0V is the potential difference (V).

Locate:

Energy =?

Answer:

Energy equals completed work.

Work = qV

Energy = 2e×3 = 6eV

Energy = 6×1.6×10-¹⁹

Energy=9.6×10-¹⁹J

Holography is a method for creating three-dimensional images that uses wave interference. Lasers’ monochromatic and coherent light for distinct interference patterns makes them a useful tool for creating crisp holographic images.

We know that E = V + Ir

Where r is the internal resistance.

Subsituting the values in the formula:

10 = 9 + 1r

1 = 1r

r = 1 ohm

Q is equal to 7.2x105C.

C = 6×10-6F

Since Q=CV

V = Q/C

V= 7.2x105C / 6×10-6F

V = 1.2x1011V

The formula V=IR can be used to determine the current (I).

(120) = (1000)(I)

120/1000 = I

I = 120 x 10-3 A

Because calculators are not available during the exam, this value should be learned for the test.

The ratio of height to range has a convenient formula:

h/r=tanθ/4

Therefore, the angle that makes the height to range ratio precisely equal to one is the one with a tangent of 4.

tan−1(4) = 75.96°

The number of coil turns, N, is directly proportional to the magnetic flux, ø.
Flux = BA cos(θ) And B = uo n I

Hence flux = uo n I A cos(θ)
They are therefore exactly proportionate.