1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
alekssr [168]
3 years ago
10

You need to figure out how high it is from the 3rd floor of Keck science building to the ground. You know that the distance from

the ground to the 2nd floor is 5m. Your friend drops a ball from rest from the 3 rd floor and you start to time the ball when it passes by you at the 2nd floor. You stop the timer when the ball hits the ground. The time recorded is 0.58 seconds.
Physics
1 answer:
Tcecarenko [31]3 years ago
4 0

Answer:1.624 m

Explanation:

Given

height of 2nd floor =5 m

time recorded is 0.58 sec

Let h be the height of third floor above 2 nd floor

h=ut+\frac{at^2}{2}

here u=0

t=time taken to cover height h

h=\frac{gt^2}{2}   ----------1

Now time taken to complete whole building length

h+5=\frac{g(t+0.58)^2}{2}  ----------2

Subtract 1 form 2

5=\frac{g(2t+0.58)(0.58)}{2}

Taking gravity g=1 m/s^2

1=(2t+0.58)(0.58)

t=0.57 s

Substitute the value of t in 1

h=1.624 m

You might be interested in
Susan is quite nearsighted; without her glasses, her far point is 34 cm and her near point is 17 cm . Her glasses allow her to v
butalik [34]

Answer:

u=34cm

Explanation:

From the question we are told that:

Far point is V=34 cm

Near point is u=17 cm

Therefore

Focal Length

f=-34cm

Generally the equation for the Lens is mathematically given by

\frac{1}{u}=\frac{1}{f}-\frac{1}{v}

\frac{1}{u}=\frac{1}{-34}-\frac{1}{-17}

u=34cm

5 0
3 years ago
Which would most likely cause the cylinder head temperature and engine oil temperature gauges to exceed their normal operating r
dusya [7]

Answer: Using fuel that has a lower-than-specified fuel rating.

Explanation:

Most likely, what causes the cylinder head temperature and engine oil temperature gauges to exceed their normal operating ranges is using fuel that has a lower-than-specified fuel rating. This can lead to detonation of the engine which is the tendency for the fuel to pre-ignite or auto-ignite in an engine's combustion chamber.The cylinder head and the engine oil are part of the automobile systems that helps in fuel combustion.

3 0
3 years ago
Suppose you pour 0.250 kg of 20.0°C water into a 0.600 kg aluminum pan off the stove with a temperature of 173°C. Assume that th
lapo4ka [179]

Answer:

T_f=5.0116^{\circ}C

Explanation:

Given:

  • mass of water, m_w=0.25\ kg
  • initial temperature of water, T_i_w=20^{\circ}C
  • initial temperature of pan, T_i_p=173^{\circ}C
  • mass of pan, m_p=0.6\ kg
  • mass of water evapourated, m_v=0.03\ kg
  • specific heat of water, c_w=4186\ J.kg^{-1}.K^{-1}
  • specific heat of aluminium pan, c_a=900\ J.kg^{-1}.K^{-1}
  • latent heat of vapourization, L=2256000\ J.kg^{-1}

<u>Using the equation of heat:</u>

<em>Here, initially certain mass of water is vapourised first and then the remaining mass of water comes in thermal equilibrium with the pan.</em>

m_p.c_a.(T_{ip}-T_f)=m_v.L+(m_w-m_v).c_w.(T_f-T_{iw})

0.6\times 900\times (173-T_f)=0.03\times 2256000+(0.25-0.03)\times 4186\times (T_f-20)

T_f=5.0116^{\circ}C

5 0
3 years ago
What is the momentum of an 18-kg object moving at 0.5 m/s?
Otrada [13]

sorry Idk the answer ..???

6 0
3 years ago
A truck moves 30 km West, and then 40 km North, and then travels in a straight path back to its starting
SpyIntel [72]

Distance = (30+40+50) = 120 km

It's back where it started, so displacement = zero

7 0
3 years ago
Other questions:
  • PLEASE ANSWER 14-25 ASAP<br> Thanks
    9·1 answer
  • An object at rest requires a force of 15 newtons to set it into motion. This force is greater than which force?
    15·1 answer
  • A skateboarder is standing at the top of a tall ramp waiting to begin a trip. The skateboarder has
    14·2 answers
  • A net force of -1,000 Newtons is delivered to the object over a time of .02 seconds. Calculate the new velocity of the object.
    11·1 answer
  • A biologist wants to increase the rate of his chemical reaction but has a limited amount of enzyme. He continues to increases th
    14·1 answer
  • A colony of troglodytes has been in a lengthy feud with
    13·1 answer
  • PLEASE HELP WILL GIVE 10 POINTS!!!!
    7·2 answers
  • The soles of a popular make of running shoe have a force constant of 2.0×105 N/m . Treat the soles as ideal springs for the foll
    11·1 answer
  • Four forces are exerted on each of the two objects shown below:
    15·2 answers
  • An electric current in a conductor varies with time according to the expression I(t) = 100 sin (120πt) , where I is in amperes a
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!