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tester [92]
3 years ago
5

What trends were seen in Mendeleev’s periodic table?

Physics
2 answers:
bagirrra123 [75]3 years ago
4 0
He arranged his periodic table by each elements atomic mass      
katrin [286]3 years ago
3 0
He arranged his periodic table by each elements atomic mass
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how do u calculate the kinetic energy of a ball of mass 0.25kg being kicked vertically upwards with a speed of 5m/s​
vfiekz [6]

Answer:

3.125J

Explanation:

K.E.= 1/2(mass)(velocity)^2

K.E.=1/2(0.25)(5)^2=3.125

6 0
3 years ago
A student heats a liquid on a burner. What happens to the portion of liquid that first begins to warm? Check all that apply.
kherson [118]

Answer:

The answers are options B,D and E

Explanation:

B) The particles in the liquid are slowly overcoming the forces of attraction and spreading out due to the thermal energy they are absorbing. This makes the liquid less dense as it slowly changes into a gas after reaching its boiling point.

D) The particles start absorbing the energy form the surroundings as latent heat of evaporation. They need this energy to overcome the strong forces of attraction between particles to change into the gaseous state

E) The particles have spaced out due to the thermal energy absorbed, making the liquid lighter and it rises upwards.

5 0
3 years ago
How does a rotating coil inside a magnetic field generate electricity?
Goryan [66]

Answer:

When an electrical current passes through a wire, a magnetic field is generated around it. Likewise, if the magnetic field around a wire is changed ( for example by rotating a coil inside a stationary manger), electricity will move through the wire.

4 0
3 years ago
If you heat a thin, circular ring in the oven, does the rings hole get larger or smaller?
KiRa [710]
Unless the ring by design will have restriction for any outward expansion. The hole will get larger / bigger as you heat this up. The more you heat an object the more it expands, thus the larger the hole gets. The only case is when outward expansion is restricted, the expansion will be inward as it is the only direction the ring can expand to.
5 0
3 years ago
A smart phone charger delivers charge to the phone, in the form of electrons, at a rate of -0.75. How many electrons are deliver
Ray Of Light [21]

Answer:

The no. of electrons is 7.59\times 10^{21}

Solution:

According to the question:

The rate at which the charge is delivered is given by:

\frac{dQ}{dt} = - 0.75

Now,

\int_{0}^{Q}dQ = - 0.75\int_{0}^{27 min} dt

Q = -0.75t|_{0}^{27 min}

Q= -0.75\times 27\times 60 = - 1215 C

No. of electrons, n can be calculated from the following relation:

Q = ne

where

e = electronic charge =1.6\times 10^{- 19} C

Thus

n = \frac{Q}{e}

n= \frac{1215}{1.6\times 10^{- 19}}

n = 7.59\times 10^{21}

8 0
3 years ago
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