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
Serhud [2]
3 years ago
6

Little Timmy wants to measure how tall his house is. He doesn’t have a tape measure but does have a stopwatch. He recruits Big B

ob to climb on his roof and drop a rock. He times the rocks fall and finds it to be 1.67 s. How tall is his house?
Physics
1 answer:
Komok [63]3 years ago
6 0

The distance covered by an object accelerating from rest is

D = (1/2) · (acceleration) · (time)² .

In this particular case, 'acceleration' is 9.8 m/s² ... due to gravity.

D = (1/2) · (9.8 m/s²) · (1.67 s)²

D = (4.9 m/s²) · (2.789 s²)

D =  13.67 meters

You might be interested in
Which of the following shows the prefixes in order from largest to smallest? centi, deci, nano
Burka [1]
Deci, Centi, then Nano is the correct order from largest to smallest
5 0
4 years ago
At which temperature does the motion of atoms and molecules stop?<br> 0°C<br> 0C<br> 0°K<br> 0K
anastassius [24]

Answer: 0K

Explanation:

Absolute 0 (0K) is the point where nothing could be colder and no heat energy remains in a substance.

7 0
3 years ago
Determine the magnitude of the effective value of g⃗ at a latitude of 60 ∘ on the earth. assume the earth is a rotating sphere.
dezoksy [38]
In addition to acceleration of gravity we experience centrifugal acceleration away from the axis of rotation of the earth. this additional acceleration has value ac = r w^2 where w = angular velocity and r is distance from your spot on earth to the earth's axis of rotation so r = R cos(l) where l = 60 deg is the lattitude and R the earth's radius and w = 1 / (24hr x 3600sec/hr) 
<span>now you look up R and calculate ac then you combine the centrifugal acc. vector ac with the gravitational acceleration vector ag = G Me/R^2 to get effective ag' = ag -</span>
5 0
3 years ago
Pairs of magnets are shown in the diagram.
belka [17]
The answer is X. I hope this helped
8 0
4 years ago
Read 2 more answers
What is meant by pressure?write its unit.
Mars2501 [29]

Answer:

Pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed

Unit: Pascal (Pa)

1Pa = 1N/m^2

5 0
3 years ago
Other questions:
  • List the color of the stars from hottest to coldest
    11·1 answer
  • At what speed would a 3.00 x 10^4 kg airplane have to fly and with a momentum of 1.60 x 10^9 kg.m/s
    12·1 answer
  • Imagine that an electron in an excited state in a nitrogen molecule decays to its ground state, emitting a photon with a frequen
    13·2 answers
  • The human circulation system has approximately 1×109 capillary vessels. Each vessel has a diameter of about 8 µm. Assuming cardi
    15·1 answer
  • A galvanometer can be calibrated to read electric A) current B) Voltage C) either of these D) neither of these
    8·1 answer
  • If a roller coaster has 50,000 J of potential energy at the top of the first hill, how much kinetic energy does it have at the l
    13·1 answer
  • A disk with mass 1.64 kg and radius 0.61 meters is spinning counter-clockwise with an angular velocity of 17.6 rad/s. A rod of m
    10·1 answer
  • How fast must a train accelerates from rest to cover 518 m in the first 7.48 s?
    5·1 answer
  • Trey is testing a properly working resistor in a circuit and finds its value to be far lower than he expects what’s a likely err
    6·1 answer
  • A student holds an egg outside of an open window and let's go. The window is 40 meters above the ground and the egg is falling u
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!