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2 years ago

Is this statement true or false?

Physics

1 answer:

Margaret [11]2 years ago

5 0

I think that it is true, but I'm not exactly sure. :)

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All atoms of the element potassium have 19 protons. One of the most stable types of potassium atoms has the mass number 39. How

ozzi

The formular for determinatio of mass number is this:
Mass number = number of proton + number of neutron
From the question, we are told that:
Mass number = 39
Proton number = 19
Number of proton = ?
Number of neutron = mass number - number of proton
Number of neutron= 39 - 19 = 20
Therefore, number of neurtron = 20.

3 0

3 years ago

Read 2 more answers

Superman throws a 2400 n boulder at an adversary. what horizontal force must superman apply to the boulder to give it a horizont

balu736 [363]

The horizontal force Superman must apply to throw the boulder is 3670N.

According to Newton's Second law of motion,

Force F = Mass m * Acceleration a

We know that Weight W = Mass m * Gravity g

Given,

Weight W = 2400 N

Acceleration a = 15 m/ $s^{2}$

Gravitational force g = 9.81 m/ $s^{2}$

W = m * g

Mass m = 2400 / 9.81 = 244.65 kg

Horizontal force F = 244.65 * 15 = 3669.7 N

Newton's Second law of motion states that acceleration of an object depends on force acting on the object and mass of the object.

Therefore the horizontal force Superman must apply to throw the boulder is 3670N.

To know more about horizontal force

brainly.com/question/2037071

#SPJ4

4 0

1 year ago

1 point

Nuetrik [128]

Answer:

hehe

Explanation:

haha bdhfbwlkjgtnfvnbregbuiljkbhurbhbnwejbkehabnvrivhqern

7 0

3 years ago

A charged particle is injected at 211 m/s into a 0.0633‑T uniform magnetic magnetic field perpendicularly to the field. The diam

lakkis [162]

Answer:

$85.68*10^3C/kg$

Explanation:

For this problem we need the concept about Force in a Magnetic field,

For definition we know that

$F=m\frac{v^2}{r}$

Where v is the velocity, m the mass and r the radius or distance between the two points.

We know as well that

$F = qvB$

where q is the charge of a proton

v the velocity and B the magnetic field, then matching the two equation,

$qvB=m\frac{v^2}{r}$

Re-arrange for q/m (charge to mass ratio)

$\frac{q}{m} = \frac{v}{Br}$

Our values are,

$v=211m/s$

$B= 0.0633T$

$r=0.0389m$

Substituting,

$\frac{q}{m} = \frac{211}{0.0633*0.0389}$

$\frac{q}{m} = 85689.8 C/kg = 85.68*10^3C/kg$

7 0

2 years ago

Why does the moon look different each night?

Fiesta28 [93]

Answer:

"its varying position means that the Sun lights up different regions, creating the illusion that the Moon is changing shape over time. The best way of getting to understand the lunar phases is to regularly go out on a clear night when the Moon is in the sky and observe it."

7 0

3 years ago