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3 years ago

Electrons contribute___

Physics

2 answers:

dangina [55]3 years ago

4 0

C, electrons are negative, and most of the atom’s mass comes from the nucleus of the atom

coldgirl [10]3 years ago

3 0

C negative, little hope this helps

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Two sailboats leave a harbor in the bahamas at the same time. the first sails at 23 mph in a direction 330°. the second sails at

pishuonlain [190]

First, let us calculate the total distance that each have taken after 2 hours.

Let’s say that:

A = sailboat which sails at 23 mph in a direction 330°

B = sailboat which sails at 34 mph in a direction 190°

Calculating for distances:

dA = 23 mph (2 hours) = 46 miles

dB = 34 mph (2 hours) = 68 miles

Imagining a Cartesian coordinate, the angle θ between the two sailboats is simply the difference:

θ = 330° - 190°

θ = 140°

We know that from the law of cosines:

c^2 = a^2 + b^2 – 2 a*b*cos θ

Therefore the distance between the two after 2 hours, C, is:

C^2 = 46^2 + 68^2 – 2 (46) (68) cos(140)

C = 107.39 miles

7 0

4 years ago

A Carnot air conditioner takes energy from the thermal energy of a room at 61°F and transfers it as heat to the outdoors, which

anyanavicka [17]

Answer:

14.07 units of joules is removed for each joules of electricity used

Explanation:

The heated room temperature $T_{c}$ = 61 °F

The outside temperature $T_{h}$ = 98 °F

For conversion from fahrenheit to kelvin we use the equation

(32°F − 32) × 5/9 + 273.15

$T_{c}$ = 289.26

$T_{h}$ = 309.82

For air conditioning,

COP = $\frac{T_{c} }{T_{h} -T_{c} }$

COP = $\frac{289.26 }{309.82 -289.26 }$ = 14.07

This means that 14.07 units of joules is removed for each joules of electricity used

8 0

4 years ago

What are the two most important processes in the cycling of oxygen in and out of the atmosphere?

butalik [34]

C.
It is C because photosynthesis uses CO2 to form O2 and respiration uses O2 to create CO2, both processes filter oxygen through the atmosphere.

5 0

3 years ago

Read 2 more answers

A car (mass 5 1100 kg) is traveling at 32 m/s when it collides headon with a sport utility vehicle (mass 5 2500 kg) traveling in

Elan Coil [88]

Answer:

speed was the sport utility vehicle traveling is 14.08 m/s

Explanation:

Given data

car mass m1 = 1100 kg

speed s = 32 m/s

vehicle mass m2 = 2500 kg

to find out

speed was the sport utility vehicle traveling

solution

we will apply here conservation of momentum law

the momentum change of car is equal and opposite of the momentum change of vehicle

so equation are

m1 v1 - m2 v2 = 0

so here v2 will be

v2 = (m1 / m2 ) v1

put here all these value we get

v2 = (1100 / 2500 ) 32

v2 = 14.08 m/s

so speed was the sport utility vehicle traveling is 14.08 m/s

8 0

3 years ago

You do 75 j of work in 8.0 seconds. how much power do you use?

NeTakaya

75/8=power because power=work done/time taken

6 0

3 years ago