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3 years ago

Two multiple choice questions.

Physics

2 answers:

hammer [34]3 years ago

5 0

A collision of the earth and another planet the size of mars is thought to have resulted in
Moon
the size of mars resulted into moon
so correct option is D
If i helped please make me brainiest

m_a_m_a [10]3 years ago

4 0

C and c infeijnveirnvinefine

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A student is helping her teacher move a 9.5 kg box of books. what net sideways force must she exert on the box to slide it acros

Tanzania [10]

Mass of the box which contains books (m) = 9.5 kg

Acceleration required (a) = 1 m/s^2

Let the force applied by the teacher and student be F.

The only force acting in the horizontal direction is F and it will produce an acceleration of 1 m/s^2

According to Newton's Seconds law:

F(net) = ma

F = ma

F = 9.5 × 1

F = 9.5 Newtons

Hence, the sideways force applied by teacher and the students is equal to 9.5 Newtons

7 0

3 years ago

What is the power output of an electric motor that lifts a 2.0 kilogram block 15 meters vertically in 6.0 seconds

Hatshy [7]

power output
= work done / time
= 2 * 9.81 * 15 / 6
= 49.05W
answer
4.49 W

5 0

3 years ago

In which application is a magnet used to store information?

tatiyna

Answer:

D. The disk in a computer hard drive

The disk has a magnetic coating in which the information is stored on the magnetic strips.

3 0

3 years ago

Read 2 more answers

In nuclear fission, a nucleus splits roughly in half. (a) What is the potential 2.00 × 10−14 m from a fragment that has 46 proto

Valentin [98]

Answer:

electric potential is 3.31 × $10^{6}$ V

potential energy is 152 MeV

Explanation:

given data

fragment charge Q = 46 protons = 46 × 1.6 × $10^{-19}$ C

to find out

electric potential and potential energy

solution

we know here distance from fragment d = 2 × $10^{-14}$ m

and constant for electric force k that is 9 × $10^{9}$ N-m²/C²

so that we can find electric potential = kQ/d

electric potential = 9 × $10^{9}[/tex ×46 × 1.6 × [tex]10^{-19}$ / ( 2 × $10^{-14}$ )

electric potential = 3.31 × $10^{6}$ V

and

we know relation between electric potential and potential

that is V = U/q

so U will be = qV

now put all value

we get potential energy U

potential energy = 46 × 3.31 × $10^{6}$

potential energy = 1.52 × $10^{8}$ eV

so potential energy = 152 MeV

4 0

3 years ago

The diameter of a hydrogen atom is 0.000000000106 m. How can this

Andreas93 [3]

Answer:

The diameter of a hydrogen atom based on scientific notation is 1.06 x 10^-10 m

8 0

3 years ago