An object with projectile motion constantly changes direction.<br> TRUE<br> FALSE

The reactivity of alkaline metal ( example group one ) increases down the group because of the increase in atomic mass from the top to the bottom of the group. As the mass increases, the force between the nucleus and the valence electron gets weaker and the atom will easily give up the electron as a result of this which eventually increases its reactivity.

The reactivity of halogens decreases as atomic mass increases. Therefore, option B is the correct answer.

8 0

3 years ago

What capacitor in series with a 100ω resistor and a 18. 0 mh inductor will give a resonance frequency of 1000 hz?

Black_prince [1.1K]

Capacitor in series with a 100Ω resistor and a 18.0 mH inductor will give a resonance frequency of 1000 Hz is 1.38F

Resonance Frequency of a combination of Series LCR circuit is the frequency at which resonance is achieved in a circuit.

Resonance Frequency of a combination of Series LCR circuit is given by:

f = 1 / 2π $\sqrt{LC\\$

where, f is the resonance Resonance Frequency of a combination of Series LCR circuit

L is the Inductance of the inductor

C is the capacitance of the capacitor

Given,

f = 1000Hz

L = 18.0 mH = 0.018H

R = 100Ω

C = ?

On substituting the values in the above-mentioned formula:

1000 = 1 / 2π $\sqrt{0.018C}$

2π $\sqrt{0.018C}$ = 0.001

On solving, C = 1.38 F

Hence, the capacitance of the given capacitor is 1.38F.

Learn more about Resonant frequency here, brainly.com/question/13040523

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5 0

2 years ago

A car moving 20 m/s in the positive x-direction slams on the brakes and stops after skidding 20 m. what was its acceleration dur

pav-90 [236]

To find the acceleration of the car, we can use the following relationship:
$v_f^2 - v_i^2 = 2 aS$
where
$v_f=0$ is the final speed of the car (it is zero because the car comes to rest)
$v_i=20 m/s$ is the initial speed of the car
$a$ is the acceleration
$S=20 m$ is the distance covered

By rearranging the equation, we get:
$a= \frac{-v_i^2}{2 S}= \frac{-(20 m/s)^2}{2 (20 m)} =-10 m/s^2$
where the negative sign means it is a deceleration.

7 0

3 years ago

An object with projectile motion constantly changes direction. TRUE FALSE