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
Vladimir [108]
3 years ago
7

A rock at the top of a 20 meter tall hill.The rock has a mass of 10 kg. How much potentail   energy does it have?

Physics
1 answer:
ch4aika [34]3 years ago
6 0
P.E.=mgh
= 10x10x20
=2000J
You might be interested in
A sprinter set a high school record in track and field, running 200.0 m in 20.6 s . what is the average speed of the sprinter in
Paraphin [41]

Answer : The average speed of the sprinter is, 34.95 Km/hr

Solution :

Average velocity : It is defined as the distance traveled by the time taken.

Formula used for average velocity :

v_{av}=\frac{d}{t}

where,

v_{av} = average velocity

d = distance traveled = 200 m

t = time taken = 20.6 s

Now put all the given values in the above formula, we get the average velocity of the sprinter.

v_{av}=\frac{200m}{20.6s}\times \frac{3600}{1000}=34.95Km/hr

conversion :

(1 Km = 1000m)

(1 hr = 3600 s)

Therefore, the average speed of the sprinter is, 34.95 Km/hr

8 0
3 years ago
Read 2 more answers
List two diseases of the muscular system.
lesantik [10]

Answer:

muscular dystrophy and  myasthenia gravis

4 0
3 years ago
Read 2 more answers
Lightning produces a maximum air temperature on the order of 104K, whereas a nuclear explosion produces a temperature on the ord
gtnhenbr [62]

Answer:

tex]2.898\times 10^{-7}\ \text{m}[/tex] ultraviolet region

2.898\times 10^{-10}\ \text{m} x-ray region

Explanation:

T = Temperature

b = Constant of proportionality = 2.898\times 10^{-3}\ \text{m K}

\lambda = Wavelength

T=10^4\ \text{K}

From Wein's law we have

\lambda=\dfrac{b}{T}\\\Rightarrow \lambda=\dfrac{2.898\times 10^{-3}}{10^4}\\\Rightarrow \lambda=2.898\times 10^{-7}\ \text{m}

The wavelength of the radiation will be 2.898\times 10^{-7}\ \text{m} and it is in the ultraviolet region.

T=10^7\ \text{K}

\lambda=\dfrac{2.898\times 10^{-3}}{10^7}\\\Rightarrow \lambda=2.898\times 10^{-10}\ \text{m}

The wavelength of the radiation will be 2.898\times 10^{-10}\ \text{m} and it is in the x-ray region.

5 0
3 years ago
The amount of gravitational potential energy released as:_________.
nordsb [41]

Answer:

b.it depends on the distance it falls

8 0
2 years ago
A projectile is launched with an initial velocity of (40 m/s), at an angle of (30°) above
zlopas [31]

Answer:

330.5  m

Explanation:

In this case, the object is launched horizontally at 30° with an initial velocity of 40 m/s .

The maximum height will be calculated as;

h=\frac{v^2_isin^2\alpha }{2g}

where ∝ is the angle of launch = 30°

vi= initial launch velocity = 40 m/s

g= 10 m/s²

h= 40²*sin²40° / 2*10

h={1600*0.4132 }/ 20

h= 661.1/2 = 330.5  m

8 0
2 years ago
Other questions:
  • In what direction does an object move when affected by an unbalanced force
    9·1 answer
  • How much heat is needed to raise the temperature of 8g of water by 20oC?
    7·1 answer
  • Two cars are raised to the same elevation on service- station lifts. If one car is twice as massive as the other, how do their p
    7·1 answer
  • An electromagnetic wave travels in a vacuum. The wavelength of the wave is tripled. How is this accomplished?
    9·1 answer
  • a body of mass 2kg is released from rest on a smooth plane at an angle of 60 degree to the horizontal.calculate the acceleration
    12·1 answer
  • How do lone pairs of electrons affect the bond angle differently than electrons shared in a bond?
    9·1 answer
  • Are the objects described here in static equilibrium, dynamic equilibrium, or not in equilibrium at all?
    5·1 answer
  • Spaceship 1 and Spaceship 2 have equal masses of 200 kg. Spaceship 1 has a speed of 0 m/s, and Spaceship 2 has a speed of 6 m/s.
    6·1 answer
  • Height of the image formed by a lens is-2cm.0what is the nature of the image?
    10·1 answer
  • Write one to two sentences explaining whether this passage from the story is exposition, rising action, climax, or resolution: “
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!