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Oksanka [162]
3 years ago
8

Atoms of elements in the same group have the same number of [Blank] This is why they have similar chemical properties.

Physics
2 answers:
serg [7]3 years ago
6 0
Atoms of elements in the same group have the same number of Valence Electrons.
777dan777 [17]3 years ago
5 0

Answer:

valence electrons

Explanation:

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I need the right answer ASAP NO LINKS!!!
serious [3.7K]

Answer:

Water and power come from external sources.

Explanation:

3 0
3 years ago
A car travels 240 miles south in 3 hours. find the velocity of the car in mi/hr and m/s
marshall27 [118]

We'll find the car's speed first, and then use that to find the velocity.

Speed = (distance covered) / (time to cover the distance)

Speed = (240 miles) / (3 hours)

Speed = (240/3) · (miles/hours)

Speed = 80 mile/hour

Now to convert the units, we'll use

-- 1 mile = 1,609 meters

-- 1 hour = 3,600 seconds

(80 miles/1 hour) · (1,609 meter/1 mile) · (1 hour/3,600 second) =

(80 · 1,609 · 1) / (1 · 1 · 3,600) (mile · meter · hour / hour · mile · second) =

35.76 meter/second

Now, to make a velocity, all we need to do is to add the direction to the speed.

So the car's <em>velocity</em> is <em>80 mi/hr south</em>, or <em>35.76 meter/sec south</em> .

4 0
3 years ago
The application of knowledge to solve practical problems is known as.
igomit [66]
PEMDAS which means Parenthesis, Exponet, Multiplication, Division, Addition, and Subtraction.
3 0
3 years ago
A (light) pallet has a load of cases of tomato paste each of which is a cube of length L and has identical mass. Find the center
Dafna1 [17]

Answer:

From left = 1.2L

From back = 0.9L

Explanation:

5 x = 3(L-X) + 2(2L-X)

X = 0.7L

Distance from left = 1.2L

7y = 2(L-X)+1(2L-x)

Y = 0.4L

Distance from back = 0.9L

6 0
3 years ago
A satellite is put into an orbit at a distance from the center of the Earth equal to twice the distance from the center of the E
Sveta_85 [38]

Answer:

995 N

Explanation:

Weight of surface, w= 4000N

Gravitational constant, g, is taken as 9.81 hence mass, m of surface is W/g where W is weight of surface

m= 4000/9.81= 407.7472

Using radius of orbit of 6371km

The force of gravity of satellite in its orbit, F=\frac {GMm}{(2r)^{2}}=\frac {GMm}{4(r)^{2}}

Where G=6.67*10^{-11} and M=5.94*10^{24}

F=\frac {(6.67*10^{-11}*5.94*10^{24}*407.7472)}{4*({6.371*10^{6}m)}^{2}}

F= 995.01142 then rounded off

F=995N

6 0
3 years ago
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