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
Ilia_Sergeevich [38]
3 years ago
11

An apple with a mass of 0.95 kilograms hangs from a tree branch 3.0 meters above the ground. If it falls to the ground, what is

the kinetic energy of the apple just as it reaches the ground?
A 0.28J
B 2.8 J
C 28 J
D 280 J
Physics
2 answers:
lubasha [3.4K]3 years ago
6 0
Ke = pe
pe = mgh
= 0.95 x 9.8 x 3
= 27.93 J
MatroZZZ [7]3 years ago
6 0
The Answer to the problem would be
C. 28 J
You might be interested in
if a metal object was cut on half how much heat will be required to raise both half to a specific temperature
il63 [147K]

suppose the mass of a metal object be m and its specific heat capacity be s, and, H joules of heat is required to raise its temperature by t degrees Celsius

Than H is given by relation, H = mst

Now if this object is cut in two half's, than mass of half part will also be half <em>i.e. </em>M/2

So heat required to heat the half part will be = (\frac{m}{2}) st =\frac{mst}{2} = H/2  

Hence, the heat required to raise the half object to a specific temperature will also become half.

3 0
3 years ago
A racetrack has the shape of an inverted cone, as the drawing shows. On this surface the cars race in circles that are parallel
sergey [27]

Answer:

The value of d is 183.51 m.

Explanation:

Given that,

Speed of car = 34.0 m/s

Suppose The car race in the circle parallel to the ground surface is at an angle 40°

The radius of circular path r = d\cos\theta

Normal force acting on the car = N

We need to calculate the value of d

Using component of normal force

The horizontal component of normal force is equal to the gravitational force.

N\cos\theta=mg....(I)

The vertical component of normal force is equal to the centripetal force

N\sin\theta=\dfrac{mv^2}{r}.....(II)

Divided equation (I) by equation (II)

\tan\theta=\dfrac{v^2}{gr}

Put the value of g

\tan\theta=\dfrac{v^2}{g\times d\cos\theta}

v^2=\tan\theta\times g\times d\cos\theta

v^2=g\times d\sin\theta

d=\dfrac{v^2}{g\sin\theta}

Put the value into the formula

d=\dfrac{(34.0)^2}{9.8\times\sin40}

d=183.51\ m

Hence, The value of d is 183.51 m.

3 0
3 years ago
You blow across the open mouth of a test tube and produce the fundamental standing wave of the air column inside the test tube i
WITCHER [35]

Answer:

B: 980 Hz

Explanation:

8 0
3 years ago
Read 2 more answers
Which of the following statements about electric field lines associated with electric charges is false? Electric field lines can
Tcecarenko [31]

Answer:

The false statement is 'Electric field lines form closed loops'.

Explanation:

  • Electric field lines originate from positive end and terminates at negative end,i.e., field lines are inward in direction to the negative charges and outward from the positive charges.
  • These lines when close together represents high intensity and when far apart shows low intensity of the field.
  • These lines do not intersect, as the tangent drawn on these lines provides us with the field direction and intersection of these lines means two field directions which is not possible.
  • These lines unlike magnetic field lines do not form closed loops as they do not turn around but originate at positive end and terminates at negative end which ensures no loop formation.
8 0
3 years ago
What must be part of a quantitative observation?
inna [77]
a number hope this helps
8 0
3 years ago
Read 2 more answers
Other questions:
  • Paragraph about cell wall
    15·2 answers
  • Which one of the following is a balanced equation?
    5·1 answer
  • An inflatable backyard swimming pool is being filled from a garden hose with a flowrate of 0.12 gal/s. (a) If the pool is 8 ft i
    6·2 answers
  • Based on what you have just read, why is studying atoms and their parts and particles helpful to people?
    12·2 answers
  • One alternative to burning non-renwable fuels, which harm the environment, could be to burn:
    11·1 answer
  • A car travels 98 km. It takes 34.92 minutes to complete the trip. What was the average speed?
    9·1 answer
  • M=-2 the imagine equals what?
    5·1 answer
  • Which of the following is true of alternating current? Select all that apply.
    13·1 answer
  • How could nanotechnology best be used to improve the treatment of cancer with chemotherapy?
    13·1 answer
  • 2. Summarize how the force of gravity
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!