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Kazeer [188]
3 years ago
15

A free falling object starts from rest. After 3 seconds, it will have a speed of about

Physics
1 answer:
Tems11 [23]3 years ago
5 0

Answer: 30 m/s

hope this helps

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4 years ago
An exothermic reaction is taking place in a test tube what would you expect to feel when you touch the outside of the test tube
ValentinkaMS [17]

Answer:

Heat, Let me explain,

Explanation:

An exothermic reaction is like... Lighting a candle so it produces  a small amount of heat in less than a second and then normal heat.

7 0
4 years ago
A horizontal force of 150 N is used to push a 40.0-kg packing crate a distance of 6.00 m on a rough horizontal surface. If the c
icang [17]

Answer:

a. 900 J

b. 0.383

Explanation:

According to the question, the given data is as follows

Horizontal force = 150 N

Packing crate = 40.0 kg

Distance = 6.00 m

Based on the above information

a. The work done by the 150-N force is

W = F x = \mu N x = \mu\ m\ g\ x

W = 150 \times 6

= 900 J

b. Now the coefficient of kinetic friction between the crate and surface is

\mu = \frac {F}{m\timesg}

= \frac{150}{40\times 9.8}

= .383

We simply applied the above formulas so that each one part could calculate

3 0
4 years ago
An absent-minded Penn State professor drives from State College to Tyrone, 20 miles away, at 60 mph (miles per hour), before rea
BaLLatris [955]

Answer:20 mph

Explanation:

Given

distance between college to Tyrone=20 miles

Given professor drives with a velocity of 60 mph

he returns to college after reaching tyrone and then again drive to tyrone.

so his net displacement is 20 miles

time taken to cover 20 miles is \frac{1}{3} hr

average velocity=\frac{Displacement}{Time\ taken}

V_{avg}=\frac{20}{\frac{1}{3}+\frac{1}{3}+\frac{1}{3}}

V_{avg}=\frac{20}{1}=20 mph

8 0
4 years ago
Which of the following is an example of a conductor?
nordsb [41]
Answer: B. a gold chain
7 0
3 years ago
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