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3 years ago

7

PLEASE HELP!! DUE SOON!! THANKS BRAINLIEST OFFERED!!

1 answer:

pav-90 [236]3 years ago

7 0

Answer:

real, inverted, and smaller than the object

Explanation:

When the object is placed beyond the center of curvature, the image will formed between the focus and the center of curvature. The size of the image is diminished and its nature is real and inverted.

The whole description is shown in the attached figure. It is clear that the size of the image is smaller than the object.

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If a pebble is being transported in a stream by rolling, how does the velocity of it compare to the velocity of the stream?

AleksandrR [38]

Streams carry sediment, like pebbles, in their flows. The pebbles can be in a variety of locations in the flow, depending on it's size, the balance between the upwards velocity on the pebble (drag and lift forces), and it's settling velocity.

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3 years ago

Car A (1750 kg) is travelling due south and car B (1450 kg) is travelling due east. They reach the same intersection at the same

Contact [7]

Consider the east-west direction along x-axis and north-south direction along y-axis. In unit vector notation, velocities can be given as

$\underset{V_{A}}{\rightarrow}$ = velocity of car A before collision = 0 i - $V_{A}$ j

$\underset{V_{B}}{\rightarrow}$ = velocity of car B before collision = $V_{B}$ i + 0 j

$\underset{V_{AB}}{\rightarrow}$ = velocity of combination after collision = (35.8 Cos31.6) i - (35.8 Sin31.6) j = 30.5 i - 18.8 j

$M_{A}$ = mass of car A = 1750 kg

$M_{B}$ = mass of car B = 1450 kg

Using conservation of momentum

$M_{A}$ $\underset{V_{A}}{\rightarrow}$ + $M_{B}$ $\underset{V_{B}}{\rightarrow}$ = ( $M_{A}$ + $M_{B}$ ) ( $\underset{V_{AB}}{\rightarrow}$ )

(1750) (0 i - $V_{A}$ j) + (1450) ( $V_{B}$ i + 0 j) = (1750 + 1450) (30.5 i - 18.8 j)

(1450) $V_{B}$ i - (1750) $V_{A}$ j = 97600 i - 60160 j

Comparing the coefficient of "i" and "j" both side

(1450) $V_{B}$ = 97600 and - (1750) $V_{A}$ = - 60160

$V_{B}$ = 67.3 km/h and $V_{A}$ = 34.4 km/

6 0

3 years ago

Give an example of a genotype for a person with brown hair. (brown is dominant)

nirvana33 [79]

Answer:

Bb can be an example

Explanation:

That is Because brown is dominated, so it is in Capital.

8 0

3 years ago

If you place two magnetic trains very close to eachother on a track will they atracct?

Verizon [17]

Answer:Most likely yes, sorry if wrong!!

Explanation:

7 0

3 years ago

A 0.51-kg metal sphere oscillates at the end of a vertical spring. As the spring stretches from 0.12 m to 0.23 m (relative to it

den301095 [7]

Answer:

487.23 N/m

Explanation:

Given:

mass of metal sphere 'm'= 0.51kg

the spring stretches from 0.12 m to 0.23 m. Therefore,

$s_1}$ = 0.12m and $s_{2}$ = 0.23m

the speed of the sphere decreases from 6.7 to 3.3 m/s. Therefore,

$v_{1}$ = 6.7m/s and $v_2}$ =3.3m/s

In order to find spring constant, we apply law of conservation of energy. i.e

The change of the kinetic energy of sphere is equal to the change of potential energy of the spring.

So, Δ $E_{k} =$ Δ $E_{v}$

where,

Δ $E_{k} =$ 1/2 m ( $v_{1}$ - $v_2}$ )²

Δ $E_{v}$ = 1/2 k ( $s_1}$ - $s_{2}$ )²

1/2 m ( $v_{1}$ - $v_2}$ )² = 1/2 k ( $s_{2}$ - $s_1}$ )²

k= m [ ( $v_{1}$ - $v_2}$ )²/( $s_{2}$ - $s_1}$ )²

k= 0.51 [(6.7-3.3)²/ (0.23-0.12)²]

k= 487.23 N/m

Thus, the spring constant of the spring is 487.23 N/m

5 0

3 years ago