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3 years ago

Henri Becquerel is credited with the discovery of:

Physics

2 answers:

Alex Ar [27]3 years ago

6 0

Henri Becquerel is credited with the discovery of: Radium i think

Yuri [45]3 years ago

5 0

Radium........ Hope this helps :)

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2 spheres are made from the same material. One is smaller and one is larger. Is the smaller sphere made up of smaller atoms than

motikmotik

No because because they are made up of the same material so that means same size of atoms! I hope this helps

6 0

3 years ago

Read 2 more answers

A 5.00 kg dog runs towards a skateboard with a speed of 2.50 m/s. The skateboard is initially at rest. The dog jumps onto the sk

ladessa [460]

Answer:

The mass of the skateboard is 1.25 kg.

Explanation:

We have,

Mass of dog, m = 5 kg

Initial speed of dog, u = 2.5 m/s

Initial speed of skateboard, u' = 0 (at rest)

The dog jumps onto the skateboard and both the dog and skateboard move with a speed of 2.00 m/s. It is the common speed of the dog +skateboard, V = 2 m/s. We need to find the mass of the skateboard. Using conservation of momentum as :

$mu+m'u'=(m+m')V$

m' is mass of skateboard

$5\times 2.5=(5+m')2\\\\m'=1.25\ kg$

So, the mass of the skateboard is 1.25 kg.

6 0

3 years ago

An airtight box has a removable lid of area 1.10 10-2 m2 and negligible weight. The box is taken up a mountain where the air pre

andrezito [222]

Answer:

F= $7.7\times10^2 N$

Explanation:

The magnitude of force required to pull the lid off the box by air pressure.

We know that Pressure, P= Force(F)/Area(A)

Force, F= P×A

Given: A= $1.10\times10^{-2} m^2$

P= $7\times10^{4} Pa$ .

Therefore, F= $7\times10^{4}\times1.10\times10^{-2}$ .

F= $7.7\times10^2 N$

4 0

4 years ago

Two boxes 100 kg and 200 kg are connected by a rope on a horizontal surface and are being pulled with a horizontal force of 500

crimeas [40]

Answer:

hope this helps you......

8 0

3 years ago

The net charge of 3 mol of protons is

sveticcg [70]

The charge of 1 mole of proton is equivalent to 1.60217656x10^-19 coulombs. This is also called an elementary charge. Multiply that by 3 to get the net charge of three moles of protons.

Charge of 3 mol protons = 3 x 1.60217656x10^-19 = 4.81x10^-19 coloumbs

So the answer is <span>c) 4.81×10 −19 C</span>

4 0

3 years ago