3 years ago

Every living thing needs what to survive

Physics

2 answers:

oksano4ka [1.4K]3 years ago

5 0

Food water and shelter

uysha [10]3 years ago

5 0

Water

hope this helps :)

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As a block falls through the air by 40m it does work equal to 1800J. determine the mass of the block?

Nookie1986 [14]

Answer:

4.5kg

Explanation:

Work(w)=force(m)×distance(d)

force = mass × acceleration(A)

W=1800J,Mass=m, A=10m/s^2(constant value),distance=40m

1800=m×10×40

1800=400m

divide both sides by 400

m=1800/400

m=4.5kg

8 0

3 years ago

What is your average velocity if you drive a distance of 113 km at a speed of 47 km/h, then the same distance at a speed of 66 k

Sauron [17]

Answer:

$V_{avg}=54.90\ km/h$

Explanation:

Given that

Drive 113 km at 47 km/h and another 113 km at 66 km/h.

When distance is same then average velocity can be found by using below formula:

$V_{avg}=\dfrac{2V_1V_2}{V_1+V_2}$

Here

$V_1= 47\ km/h$

$V_2= 66\ km/h$

Now by putting the values

$V_{avg}=\dfrac{2V_1V_2}{V_1+V_2}$

$V_{avg}=\dfrac{2\times 47\times 66}{47+66}$

$V_{avg}=54.90\ km/h$

8 0

4 years ago

Read 2 more answers

In which situation does the reactive force between two colliding objects cause a physical change? (1 point)

jarptica [38.1K]

Answer:

a baseball player swinging a bat and hitting a baseball, causing the bat to shatter

Explanation

took the test, hope it helps

8 0

3 years ago

Write two different unit in which mass is measured.

inessss [21]

Answer:

kilograms and grams

Explanation:

kilograms is the stadard unit for mass according to the SI system.

Grams is another unit for mass.

5 0

3 years ago

An earthquake in San Francisco produces a wave with a period of 0.80 seconds and a wavelength of 40 m., How long will it take fo

gtnhenbr [62]

Answer:

A) 3.11 Hrs

Explanation:

Wave speed is given by the formula

$Speed = \frac{wavelength}{Time\: period}$

now we will have

$speed = \frac{40}{0.80}$

$v = 50 m/s$

now the time taken by the wave to move the distance 560 km is given as

$t = \frac{distance}{speed}$

$t = \frac{560\times 10^3}{50}$

$t = 11200 s$

t = 3.11 hours

4 0

3 years ago