Answer:
When plane waves cross a boundary at a non-zero angle to the boundary, each wavefront experiences a change in <u>direction</u> and <u>wavelength</u>
Explanation:
Waves that cross the boundary from one medium to another, that have different densities at an angle to the boundary between the two medium is refracted (bent) in the second medium and experiences a change in direction and speed due to a change in the wavelength of the wave
Answer:
Explanation:
If we're talking about gravity acceleration, then
There are a variety of reasons.
1) The earth spins on its axis. The resulting required centripetal acceleration means that gravity is less intense at the equator than at the poles.
2) That same spinning causes the earth to be somewhat fatter about the equator. This means that an object at the equator is farther from the center of earth mass than the same object at a pole. Gravity decreases with the square of the distance between the masses.
3) Earth's composition is not uniform. Higher density rocks like oceanic basaltic crust will have a greater gravitational influence than lower density rocks such as continental granite.
4) much like #2, altitude will affect gravity. One would weigh slightly more in a valley than at the top of a nearby mountain due to the distance from the center of earth mass.
Answer:
1.5 x 10¹⁴
Explanation:
For the nucleus :
= radius of proton = 1.0 x 10⁻¹⁵ m
= mass of proton = 1.67 x 10⁻²⁷ kg
density of nucleus is given as
= 3.98 x 10¹⁷
For the atom :
= radius of atom = radius of proton + radius of orbit = (1.0 x 10⁻¹⁵ + 5.3 x 10⁻¹¹) m
= mass of atom = mass of proton + mass of electron = 1.67 x 10⁻²⁷ + 9.31 x 10⁻³¹ kg
density of atom is given as
= 2680.5
Ratio is given as
= 1.5 x 10¹⁴
For this case, what we can do is use the Pythagorean theorem to find the magnitude of the displacement of the car.
We have then
From here, we clear the value of d.
We have then:
Rewriting:
Answer:
The magnitude of the car's displacement is:
d = 20 miles
The image is missing, so i have attached it.
Answer:
The force exerted on the large block by the small block = 8.4 N
Explanation:
From the image attached, the mass of the small block = 2M while the mass of the large block = 3M
Also,Force on small block = F and force on large block = 2F
Equilibrium of forces on the left gives;
2F - N = 3Ma
Thus,
Ma = (2F - N)/3 - - - - eq1
Also, on right hand side, Equilibrium of forces gives;
N - F = 2Ma
Ma = (N - F)/2 - - - - eq2
Equating eq(1) and eq(2) gives us;
(2F - N)/3 = (N - F)/2
Where N is the force exerted on the large block by the small block.
Making N the subject gives;
4F - 2N = 3N - 3F
5N = 7F
N = 7F/5
We are given F = 6N
Thus;
N = 7(6)/5
N = 8.4 N