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3 years ago

The amount of matter in an object is called its

Physics

2 answers:

Serga [27]3 years ago

7 0

The amount of matter in an object is called its, mass. How much the mass weights would be referred to as weight

LiRa [457]3 years ago

4 0

<span>The amount of matter in an object is called its "Mass"

In short, Your Answer would be Option B

Hope this helps!</span>

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A baseball (m = 145 g) approaches a bat horizontally at a speed of 38.9 m/s (87 mi/h) and is hit straight back at a speed of 45.

leva [86]

Answer:

Fav = -12209 N

Explanation:

let p1 be the initial momentum of the ball and p2 be the final momentum of the ball. let v1 be the initial velocity of the ball and v2 be the final velocity of the ball.

From Newton's second law of motion, we get that the avarage force acting on the ball is given by:

Fav = Δp/t

= (p2 - p1)/t

= m(v2 - v1)/t

= [(145×10^-3)(-45.3 - 38.9)/(1×10^-3)

= - 12209 N

Therefore, the average force applies on the ball by tha bat is 12209 in the direction opposite to the balls initial direction.

7 0

3 years ago

True or false

ElenaW [278]

If im not mistaken it is true

4 0

3 years ago

Which of the following is a true statement about mass and weight? a. Mass is a measure of how much matter an object has, while w

natka813 [3]

Answer:

b option mass will not change based on location while weight will changr based on gravitational pull

bcz in the formula of weight w=mg

so w is directly proportional to g

8 0

4 years ago

At time t=0t=0 a proton is a distance of 0.360 mm from a very large insulating sheet of charge and is moving parallel to the she

insens350 [35]

Answer:

$1.34 * 10^{3}$ m/s

Explanation:

Parameters given:

distance of the proton form the insulating sheet = 0.360mm

speed of the proton, $v_{x}$ = 990m/s

Surface charge density, σ = 2.34 x $10^{-9}$ C/ $m^{2}$

We need to calculate the speed at time, t = 7.0 * $10^{-8}$ s.

We know that the proton is moving parallel to the sheet, hence, we can say it is moving in the x direction, with a speed $v_{x}$ on the axis.

The electric force acting on the proton moves in the y direction, so this means it is moving with velocity $v_{y}$ in the y axis.

Hence, the resultant velocity of the proton is given by:

$v = \sqrt{v_{x} ^{2} + v_{y} ^{2}}$

$v_{x}$ = 990m/s from the question. We need to find $v_{y}$ and then the resultant velocity v.

Electric field is given in terms of surface charge density, σ as:

E = σ/ε0

where ε0 = permittivity of free space

=> $E = \frac{2.34 * 10^{-9} } {2 * 8.85418782 * 10^{-12} }$

E = 132 N/C

Electric Force, F is given in terms of Electric field:

F = eE

where e = electronic charge

=> F = ma = eE

∴ a = eE/m

where

a = acceleration of the proton

m = mass of proton

$a = \frac{1.60 * 10^{-19} * 132}{1.672 * 10^{-27} }$

a = 1.3 * $10^{10}$ m/ $s^{2}$

Therefore, at time, t = 7.0 * $10^{-8}$ , we can use one of the equations of linear motion to find the velocity in the y axis:

$a = \frac{v_{y} - v_{0}}{t} \\\\=> v_{y} = v_{0} + at$

$v_{y}$ = 0 + (1.3 * $10^{10}$ * 7.0 * $10^{-8}$ )

$v_{y}$ = 910 m/s

∴ $v = \sqrt{v_{x} ^{2} + v_{y} ^{2}}$

$v = \sqrt{990^{2} + 910^{2} }$

$v = \sqrt{1808200}$

v = 1344.69 m/s = $1.34 * 10^{3}$ m/s

8 0

4 years ago

What happens to particles of a substance as its temperature increases? A the average kinetic energy increases B the average kine

Gemiola [76]

The answer is A. When the the temperature increases the kinetic energy increases

6 0

3 years ago