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3 years ago

Answer the question below based on the periodic table entry for bromine.

Physics

2 answers:

Sphinxa [80]3 years ago

8 0

The answer is 45 i hope i could help

solmaris [256]3 years ago

8 0

Is has 35 protons, 36 electrons and 45 neutrons.

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An 800 N man stands on a scale in a motionless elevator. When the elevator begins to move, the scale

DENIUS [597]

Answer:

Net force = 800 – 650

= 150 N

150 = (800 ÷ 9.8) a

a = 1470 ÷ 800

= 1.8375 m/s^2, downwards

3 0

3 years ago

David lifts a book 1.2 meters from the floor to the top of his desk. If the book weighed 0.50 kg, what is the gravitational pote

Anika [276]

Answer:

5.886 J

Explanation:

Given:

The mass of the book is, $m=0.5$ kg

Height of lift is, $\Delta h=1.2$ m

Acceleration due to gravity is, $g=9.81$ m/s²

Now, gain in gravitational potential energy is a function of change in position and is given as:

$\Delta PE=mg\Delta h$

Here, $\Delta PE$ is the change in gravitational potential energy.

Plug in 0.5 kg for $m$ , 9.81 for $g$ and 1.2 for $\Delta h$ . Solve for $\Delta PE$

$\Delta PE=0.50\times 9.81\times 1.2=5.886\ J$

Therefore, the gain in gravitational energy of the book is 5.886 J.

7 0

3 years ago

May I please get some help?

xxMikexx [17]

B is the correct q2ureire awej\

3 0

2 years ago

During an olympic bobsled run, the jamaican team makes a turn of radius 9.80 m at a speed of 96.6 km/h. what is the ratio of the

GREYUIT [131]

Answer:

Acceleration will 7.5 times g = 7.5 g

Explanation:

Centripetal acceleration is given by a = v²/r.

The speed in m/s will be; (96.6 Km/h )÷ 3.6

= 26.83 m/s.

Centripetal force = v²/r

= 26.83²/9.80

= 73.454 m/s²

But; g = 9.8 m/s²

Therefore the acceleration in terms of g will be;

= 73.454/9.8

= 7.5 g

Acceleration is 7.5 g

6 0

3 years ago

A 1000 kg car drives off of u 30m cliff of

Inessa05 [86]

The mechanical energy of the car is $1.54\cdot 10^6 J$

Explanation:

The mechanical energy of an object is equal to the sum of its gravitational potential energy (GPE) and its kinetic energy (KE):

E = GPE + KE

The GPE of the car is given by:

$GPE = mgh$

where

m = 1000 kg is the mass of the car

$g=9.8 m/s^2$ is the acceleration of gravity

h = 30 m is the height of the car above the ground

Substituting,

$GPE=(1000)(9.8)(30)=2.94\cdot 10^5 J$

The kinetic energy of the car is given by:

$KE=\frac{1}{2}mv^2$

where

m = 1000 kg

v = 50 m/s is the speed of the car

Substituting,

$KE=\frac{1}{2}(1000)(50)^2=1.25\cdot 10^6 J$

Therefore, the mechanical energy is

$E=GPE+KE=2.94\cdot 10^5 + 1.25\cdot 10^6 = 1.54\cdot 10^6 J$

Learn more about potential energy and kinetic energy:

brainly.com/question/6536722

brainly.com/question/1198647

brainly.com/question/10770261

#LearnwithBrainly

5 0

2 years ago