All categories

3 years ago

Match the following:

Physics

1 answer:

artcher [175]3 years ago

7 0

Answer:

Matching of Part A with Part B

Rutherford ------------ discovered proton nucleus

Bohr----------------------postulated the quantum atom

Dalton-------------------Father of atomic theory

Chadwick --------------discovery of neutron

J.J. Thomson----------discovered the electrons

hence , the matching will be

2 -- d

3 -- e

4 -- b

5 -- a

6 -- c

You might be interested in

Assume the ground is uniformly level. If the horizontal component a projectile's velocity is doubled, but the vertical component

Katarina [22]

Answer:

Explanation:

Time of flight = 2 x u sinα / g where u sinα is vertical component of projectile's velocity u .

So Time of flight = 2 x vertical component / g

vertical component = constant

g is also constant so

Time of flight will also be constant .

It will remain unchanged .

3 0

3 years ago

Free coins be quick to get them

olga nikolaevna [1]

Answer:

yeetshhdbdbdhdhdxsudhhdbdjdjd

7 0

3 years ago

Read 2 more answers

An investigator collects a sample of a radioactive isotope with an activity of 490,000 Bq.48 hours later, the activity is 110,00

Daniel [21]

Answer:

The correct answer is "22.27 hours".

Explanation:

Given that:

Radioactive isotope activity,

= 490,000 Bq

Activity,

= 110,000 Bq

Time,

= 48 hours

As we know,

⇒ $A = A_0 e^{- \lambda t}$

or,

⇒ $\frac{A}{A_0}=e^{-\lambda t}$

By taking "ln", we get

⇒ $ln \frac{A}{A_0}=- \lambda t$

By substituting the values, we get

⇒ $-ln \frac{110000}{490000} = -48 \lambda$

⇒ $-1.4939=-48 \lambda$

$\lambda = 0.031122$

As,

⇒ $\lambda = \frac{ln_2}{\frac{T}{2} }$

then,

⇒ $\frac{ln_2}{T_ \frac{1}{2} } =0.031122$

⇒ $T_\frac{1}{2}=\frac{ln_2}{0.031122}$

$=22.27 \ hours$

3 0

3 years ago

Please help my test is going on. Please answer both (i) and (ii).

Eduardwww [97]

Answer:

i. 7.5 m

ii. 15000 N

Explanation:

Area under vt graph shows the displacement

so area of triangle ABE= 1/2×15×2

=7.5 m

ii) F=ma

here, m=1000kg

and a=v-u/t

=15-0/1

a=15

F=1000×15=15000N

8 0

3 years ago

a car moving east at 45 km/h turns and travels west at 30 km/h. What is the magnitude and direction of the change in velocity?

PSYCHO15rus [73]

Magnitude of change is 15km/h
change in direction is to the right?

3 0

3 years ago

Read 2 more answers