How much brighter is Vega than the Sun? (astronomy)

A student walks (2.9±0.1)m, stops and then walks another (3.9 ±0.2)m in the same direction. What is the largest distance the stu

stepan [7]

Answer:

7.1 m

Explanation:

Given:

Distance traveled by the student in the first attempt = $(2.9 \pm 0.1)\ m$

Distance traveled by the student in the second attempt = $(3.9 \pm 0.2)\ m$

So, the maximum distance that the student could travel in this attempt = $(2.9+0.1)\ m = 3.0\ m$

So, the maximum distance that the student could travel in this attempt = $(3.9+0.2)\ m = 4.1\ m$

Since the student first moves straight in a particular direction, rests for a while and then moves some distance in the same direction.

So, the largest distance that the student could possibly be from the starting point would be the largest distance of the final position of the student from the starting point.

And this distance is equal to the sum of the maximum distance possible in the first attempt and the second attempt of walking which is 7.1 m.

Hence, the largest distance that the student could possibly be from the starting point is 7.1 m.

5 0

3 years ago

URGENT: true or false: liquids can be poured from one container to another because there are no attraction forces between atoms

sashaice [31]

Answer:

False

Explanation:

It's common sense

4 0

3 years ago

Read 2 more answers

a stone is dropped from a bridge and hits the pavement below in 2 seconds. what is the velocity of the stone when it hits the pa

ira [324]

Well gravity is 9.8m/s so i would assume 19.6m/2 is the velocity

8 0

3 years ago

Read 2 more answers

A source emits monochromatic light of wavelength 495 nm in air. when the light passes through a liquid, its wavelength reduces t

Katyanochek1 [597]

By definition, the refractive index is
n = c/v
where c = 3 x 10⁸ m/s, the speed of light in vacuum
v = the speed of light in the medium (the liquid).

The frequency of the light source is
f = (3 x 10⁸ m/s)/(495 x 10⁻⁹ m) = 6.0606 x 10¹⁴ Hz

Because the wavelength in the liquid is 434 nm = 434 x 10⁻⁹ m,
v = (6.0606 x 10¹⁴ 1/s)*(434 x 10⁻⁹ m) = 2.6303 x 10⁸ m/s

The refractive index is (3 x 10⁸)/(2.6303 x 10⁸) = 1.1406

Answer: a. 1.14

6 0

3 years ago

A boat having a length 3m and breadth 2m is floating on a

brilliants [131]

Answer:

60 kg

Explanation:

The man's weight is equal to the weight of the water he displaces.

mg = ρVg

m = ρV

m = (1000 kg/m³) (3 m × 2 m × 0.01 m)

m = 60 kg

The man's mass is 60 kg.

3 0

3 years ago