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3 years ago

The early experiments with static charges were done by:

Physics

1 answer:

Naddika [18.5K]3 years ago

5 0

Answer:

the answer is b .Gilbert

Explanation:

hope it helps !

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When atoms are split, they release energy. This concept applies to (2 points)

cupoosta [38]

This applies to nuclear reactions, specifically nuclear fission.

This huge release of energy has been used in atomic bombs and in the nuclear reactors that generate electricity.

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6 0

3 years ago

a persons eardrum has an area of 0.000200 m^2. How much force does the outside air at 1.00 atm exert on the eardrum

alexdok [17]

Answer:

20.3N

Explanation:

Given parameters:

Area of the eardrum = 0.0002m²

Pressure on the eardrum = 1atm = 101325Nm⁻²

Unknown:

Force exerted on the eardrum = ?

Solution:

Pressure is the force per unit area impacted on a body.

Pressure = $\frac{Force }{area}$

Force = Pressure x area

Now insert the parameters and solve;

Force = 101325Nm⁻² x 0.0002m² = 20.3N

5 0

3 years ago

A large flat block of mass 7 m rests on a level, smooth tabletop (µk ≈ 0). On top of it is a much smaller block of mass m, with

mariarad [96]

Answer:

3. µs g /7

Explanation:

The largest Force appear when the maximal friction Force is required.

Second Newton law for the small block:

$F_friction=u_s*N=u_s*(mg)$

$F-F_friction=ma$

$F-u_s*(mg)=ma$

Second Newton law for the Big Block:

$F_friction=7ma$

$u_s*(mg)=7ma$

$a=u_s*g/7$

8 0

3 years ago

When a 100-N force acts horizontally on an 8.0-kg chair, the chair moves at a constant speed across the level floor. Which state

TiliK225 [7]

Answer:

The applied force is greater than the frictional force.

Explanation:

the chair moves at a constant speed therefore, the answer is not A or C.

if there is no friction then the chair would accelerate and it would not be at a constant speed.

hence, the only possible answer is B.

7 0

3 years ago

1.15) What distance will 650 joules of work move a box weighing 50 newtons?

son4ous [18]

Answer:

The answer is 13 however make sure if they ask for a certain measurement like meter answer it by saying 13 meters.

Explanation:

This basically turns into basic algebra if you know the formula for work. The formula for work is W=F*d

Here are the variables that you know 650J=50N*d so you need d.

All you do is divide 650J by 50N and you get a total of 13 (meters since I don't know what they want you to put it in).

6 0

3 years ago