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sp2606 [1]
3 years ago
8

a block of wood of density 0.8 gram per centimetre cube has a volume of 60 cm3 the mass of block will be...?​

Physics
1 answer:
Tamiku [17]3 years ago
4 0
Density =mass/Volume

0.8=mass/60
Mass=0.8*60
Mass=48g
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Look at bitesizes physics section, they have all the information you need to complete this question.
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A train increases its speed steadily from 10 m/s to 20 m/s in
rewona [7]

Answer:

15m/s

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add the two speeds and divide by 2

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3 years ago
A spaceship ferrying workers to Moon Base I takes a straight-line path from the earth to the moon, a distance of 384,000 km. Sup
Tema [17]

Answer:

a) v = 19,149.6 m/s

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The equation of motion you need is:

v_f = a*t+v_0

where v_f is the final velocity, a is acceleration and t is time in hours.

Since the spaceship starts from 0 velocity:

v_f = a*t = 20.2*948 = 19,149.6 m/s

Next, you need to calculate the distances traveled on each interval, considering that both starting and final intervals travel the same distance because the acceleration and time are equal. For this part you need the next motion equation:

x=\frac{v_0+v_f}{2}t

solving for first and last interval:

Since the spaceship starts and finish with 0 velocity:

x=\frac{v}{2}t=\frac{19,149.6}{2}948=9,076,910.4m=9,076.9104km

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f_{constant_speed} =\frac{ x_{constant_speed}}{x_total} =\frac{361,846.1792}{380,000} =0.95

Which in percentage is 95% of the trip.

to calculate total time you need to calculate the time used during constant speed:

t = \frac{361,846,179.2}{19,149.6} = 18,895.75s = 314min

That added to the other interval times:

t_{total} = t_1+t_2+t_3=15.8+314.93+15.8=346.5min

5 0
3 years ago
A soccer player kicks a ball horizontally at 28 m/s from a bridge and hits the ground after 1.5 s. What is the range of the ball
Lelu [443]

Answer:

42

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= 28×1.5

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