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svetlana [45]
4 years ago
11

A car drives around racetrack for 30 seconds. What do you need to know to calculate the average velocity of the car

Physics
2 answers:
stich3 [128]4 years ago
6 0
You would need to know the distance of the racetrack to calculate the average velocity.
riadik2000 [5.3K]4 years ago
5 0
The length of the track, L.  Then average velocity magnitude is L/30s
You might be interested in
Part 1 of 2
Readme [11.4K]

Answer:

I got you.. i'm in middle school and had that same question.

Explanation:

Refer to the diagram shown below.

The vertical distance traveled is

s = 25 m

The initial vertical launch velocity is zero.

Therefore

s = (1/2)*g*t²

where g = 9.8 m/s²

t = the time of flight, s

That is,

0.5*9.8*t² = 25

t² = 25/4.9 = 5.102

t = 2.26 s

Answer: 2.26 s

3 0
3 years ago
How much energy ( in joules ) is released when 0.06 kilograms of mercury is condensed to a liquid at the same temperature ?
aleksley [76]

Answer:

B. 17,705.1 J

Explanation:

The hear released when the mercury condenses into a liquid is given by:

Q=m \lambda_v

where

m = 0.06 kg is the mass of the mercury

\lambda_v is the latent heat of vaporization

For mercury, the latent heat of vaporization is \lambda_v = 296 kJ/kg, so the heat released during the process is:

Q=(0.06 kg)(296 kJ/kg)=17.76 kJ = 17,760 J

So, the closest option is

B. 17,705.1 J

5 0
3 years ago
Read 2 more answers
At what point does the external energy enter the system?
Phoenix [80]
The correct answer as the first one above !
8 0
4 years ago
URGENTEEEEEEEEEEEEEE
OverLord2011 [107]

Answer:

no habl

Explanation:

6 0
3 years ago
what is the power of an electrical device which operates with a current of 12.4 A and a potential difference of 12 V​
jek_recluse [69]

148.8 Watts

Explanation:

P = VI

= (12 V)(12.4 A)

= 148.8 Watts

3 0
3 years ago
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