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umka21 [38]
3 years ago
12

PLEASE HELP ME!!!!!!!!!!!!!

Physics
1 answer:
Nataly [62]3 years ago
6 0

Answer:

D gravity

Explanation:

please mark me brainliest

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An object moving with a speed of 5m/s comes to rest in 10s after the brakes are applied . What is the initial velocity​?
Flauer [41]

Initial velocity is 5m/s.

8 0
2 years ago
Bromium has two naturally occurring isotopes: 79br, with an atomic weight of 78.918 amu, and 81br, with an atomic weight of 80.9
saul85 [17]

The two different isotopes have weights :

w1 = 78.918 amu

w2 = 80.916 amu

average weight w3 = 79.903 amu

The mixing of two components can be modeled as

let the fraction of w1 be 'x'

hence w1. x + w2.(1-x)  = w3

now this is a linear equation in 'x'. Substituting the values we get

x = 0.507

hence the percentage of Br79 = 50.7% and the percentage of BR81 = 49.3%

8 0
3 years ago
The momentum difference of a 3 kg mass with initial velocity of 8 m/s and a final velocity of 16 m/s
8090 [49]

Answer:

6

Explanation:

because if 3kg is 8m/s then 16 divided by 2 is 8 means add 3 to 3 and get the final answer

3 0
3 years ago
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A student wearing a frictionless roller skates on a horizontal is pushed by a friend with a constant force of 55N. How far must
umka21 [38]

Answer:

6.58m

Explanation:

The kinetic energy = Workdone on the roller

Workdone = Force * distance

Given

KE = Workdone = 362J

Force = 55N

Required

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Substitute into the formula;

Workdone = Force * distance

362 = 55d

d = 362/55

d = 6.58m

Hence the student must push at a distance of 6.58m

3 0
3 years ago
Suppose you wanted to be able to see astronauts on the moon. What is the smallest diameter of the objective lens required to res
LenaWriter [7]

Answer:

A:1.94

Explanation:

cause that the only one on there

5 0
3 years ago
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