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GaryK [48]
3 years ago
13

Group 1A elements have similar properties because they___

Physics
1 answer:
kirza4 [7]3 years ago
3 0

Answer:

that is because they have a strong tendency to donate their valence electron in the last shell to form strong ionic bonds

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when an apple falls towards the earth,the earth moves up to meet the apple.is this true ?if yes,why is the earth's motion not no
stira [4]

Answer:

Yes

Explanation:

Newton's third law

For every action, there is an equal and opposite reaction.

SO if the apple is falling 9.8 m/s2 then the same force is pushing against it.

Hope this helps

6 0
3 years ago
Which would you use with a circuit to determine if a magnet was moving in close proximity to the circuit?
stealth61 [152]

Answer:

i think it would be Galvanometer

Explanation:

because it would have to be a type of coil or wire

7 0
3 years ago
Read 2 more answers
All ecosystems need<br> and<br> in order to survive.
Triss [41]

Answer:

An ecosystem is a community of living things and their non-living environment, and may be as large as a desert or as small as a puddle. An ecosystem must contain producers, consumers, decomposers, and dead and inorganic matter. All ecosystems require energy from an external source – this is usually the sun.

Explanation:

4 0
3 years ago
- 3000 J of work is done on a 2kg object over a distance of 10m. What is the force acting on the object?
SpyIntel [72]
The answer is B. 300N
7 0
3 years ago
A pilot, whose mass is 84.0 kg, makes a loop-the-loop in a fast jet. Assume that the jet maintains a constant speed of 345 m/s a
arsen [322]

Answer:

The apparent weight is 5 times greater than the original weight at the bottom.

Explanation:

Given:

Mass of the pilot, m = 84 kg

Velocity of the jet, v = 345 m/s

Radius of the loop, R = 3.033 km = 3.033 * 10^3 m

We have to find the apparent weight that the pilot feels.

Let the apparent weight be "N" .

Apparent weight :

  • It is based on where is the position of the pilot in the loop-the-loop.
  • The apparent weight is the highest at the bottom of the loop-the-loop.
  • Because the weight acts down and the normal force acts towards the center of the circle.

From the FBD shown we can say that :

apparent weight (N)

⇒ N=mg+\frac{mv^2}{R}

⇒ N=mg(1+\frac{v^2}{Rg} )

⇒ N=mg(1+\frac{(345)^2}{3.033\times 10^3 \times 9.8} )

⇒ N=5mg

Therefore,

The force exerted by the seat on the pilot at the bottom of the loop is greater than the pilots weight by a factor of 5.

7 0
3 years ago
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