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3 years ago

The long-term effect of temperature on the polar ice is not fully understood by science. True False

2 answers:

5 0

In short, very sure. Over 97 percent of climate scientists agree that man-made climate change is a reality. I would definitely say that this is false.

Reika [66]3 years ago

3 0

I suggest the answer is True!!!!

You might be interested in

What is the magnitude of the dipole moment formed by separating a proton and an electron by 100 pm

amm1812

When two electrical charges, of opposite sign and equal magnitude, are separated by a distance, a dipole is established. The size of a dipole is measured by its dipole moment . Dipole moment is measured in Debye units, which is equal to the distance between the charges multiplied by the charge

Dipolemoment 'D' = e x d where e= charge and d= distance by which charge is separated. 
In this case e = charge on electron = 1.6 x10^-19 C

D = 1.6 x10^-19 C ( 1x10^-10 m) =1.6x10^-29 Cm

3 0

4 years ago

A beam of light from a laser illuminates a glass how long will a short pulse of light beam take to travel the length of the glas

Eduardwww [97]

Answer:

The time of short pulse of light beam is $2.37\times10^{-9}\ sec$

Explanation:

Given that,

A beam of light from a laser illuminates a glass.

Suppose, the length of piece is $L=25.21\times10^{-2}\ m$

Index of refraction is 2.83.

We need to calculate the speed of light pulse in glass

Using formula of speed

$v=\dfrac{c}{\mu}$

Put the value into the formula

$v=\dfrac{3\times10^{8}}{2.83}$

$v=1.06\times10^{8}\ m/s$

We need to calculate the time of short pulse of light beam

Using formula of velocity

$v=\dfrac{d}{t}$

$t=\dfrac{d}{v}$

Put the value into the formula

$t=\dfrac{25.21\times10^{-2}}{1.06\times10^{8}}$

$t=2.37\times10^{-9}\ sec$

Hence, The time of short pulse of light beam is $2.37\times10^{-9}\ sec$

3 0

4 years ago

g A small object of mass 2.5 g and charge 18 uC is suspended motionless above the ground when immersed in a uniform electric fie

kvasek [131]

Answer: $1361.11\ N/C,\text{upward}$

Explanation:

Given

Mass of particle is $m=2.5\ gm$

Charge of particle is $q=18\ \mu C$

Electrostatic force must balance the weight of the particle

$\lim_{n \to \infty} a_n \Rightarrow mg=qE\\\\\Rightarrow E=\dfrac{2.5\times 9.8\times 10^{-3}}{18\times 10^{-6}}\\\\\Rightarrow E=1361.1\ N/C$

Direction of the electric field is in upward direction such that it opposes the gravity force.

4 0

3 years ago

Define Simple harmonic motion (SHM). A body moving with SHM has an amplitude of 10 cm and a frequency of 100 Hz. Find (a) the pe

luda_lava [24]

Answer:

Explanation:

Simple harmonic motion is the motion that involves the cyclic and periodic motion of an object about a central point or equilibrium position, due to the effect of a restoring force, such that the object has the same maximum displacement during its motion on either side of the equilibrium point

(a) The parameters of the body moving with SHM are;

The amplitude of the motion of the body, a = 10 cm

The frequency of the complete cycles of the motion of the body, f = 100 Hz

The period of the oscillation, 'T', is the time it takes o complete one cycle

T = 1/f

∴ T = 1/100 Hz = 0.01 seconds

(b) The acceleration, a = -A·ω²·sin(ω·t)

Where;

One complete oscillation is given as ω·t = 2·π

Therefore at either end at the maximum displacement, which is at either end of the equilibrium position is reached at half a complete cycle, or ω·t = 2·π/2 = π

At the maximum displacement a = -A·ω²·sin(ω·t) = A·ω²·sin(π) = 0

Therefore, we have;

The acceleration, of the body at the maximum displacement, a = 0 m/s².

7 0

3 years ago

Water from a vertical pipe emerges as a 10-cm-diameter cylinder and falls straight down 7.5 m into a bucket. The water exits the

cupoosta [38]

The diameter of the column of the water as it hits the bucket is 4.04 cm

The equation of continuity occurs in the fluid system and it asserts that the inflow and the outflow of the volume rate at the inlet and at the outlet of the system are equal.

By using the kinematics equation to determine the speed of the water in the bucket and applying the equation of continuity to estimate the diameter of the column, we have the following;

Using the kinematics equation:

$\mathbf{v_f ^2 = v_i^2 + 2gh}$