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3 years ago

How can you get acceleration when talking about speed?

Physics

1 answer:

vagabundo [1.1K]3 years ago

3 0

Answer:

Acceleration (a) is the change in velocity (Δv) over the change in time (Δt), represented by the equation a = Δv/Δt. This allows you to measure how fast velocity changes in meters per second squared (m/s^2).

Explanation:

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A radioactive sample has a count rate of 10,000 Bq. 24 days later the activity has fallen to 625 Bq. What is the half-life of th

joja [24]

Answer:

10000 Bq / 625 Pq = 16

Radioactivity has decreased by a factor of 16

2^4 = 16

So the sample has gone thru 4 half-lives

24 da / 4 = 6 da

6 da is the half-life

6 0

3 years ago

Kalyan ramji sain, of india, had a mustache that measured 3.39 m from end to end in 1993. suppose two charges, q and 3q, are pla

jeka94

Answer:

$q=3.19*10^{-8}C$

Explanation:

The expression for the electric force between two charges

$F=k\frac{q_1q_2}{r^2}\\$

where K is the Coulomb's constant (k=9*10^{9}Nm^2/C^2), and we have that

q1=q

q2=3q

r=3.39m

F=2.4*10^{-6}N

By replacing in the formula we have

$F=2.4*10^{-6}N=(9*10^{9}\frac{Nm^2}{C^2})\frac{(q)(3q)}{(3.39m)^2}\\\\$

and by taking apart q we have

$q=3.19*10^{-8}C$

hope this helps!!

4 0

3 years ago

All the apples in the following diagram are identical. If each falls off its stack of books, which will have the most kinetic en

VikaD [51]

Sure. The kinetic energy at the bottom comes from the potential energy
that it had at the top, and the potential energy depends on the height where
it starts from. So the apple that falls from the highest height has the most
potential energy when it starts falling, and the most kinetic energy when
it's done falling.

SIMILARLY ...

If you fall off of the table, you land with more kinetic energy than if you
fall off of a book on the floor.

6 0

3 years ago

Read 2 more answers

Una partícula se mueve en el plano XY efectúa un desplazamiento mientras actúa sobre ella una fuerza constante. X= (4i + 3j) m,

dsp73

Answer:

a) La magnitud del desplazamiento es de 5 m

La magnitud de la fuerza es 20 N

b) El trabajo realizado por la fuerza es de 100 J

c) El ángulo entre la fuerza y el plano es 0 °

Explanation:

a) La magnitud del desplazamiento se encuentra por la relación;