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
77julia77 [94]
3 years ago
7

What is the gravitational potential energy of a book with a mass of 0.30 kg on a 1.0 m high desk?

Physics
2 answers:
NeTakaya3 years ago
8 0

Answer:

Potential energy, PE = 2.94 joules

Explanation:

Given that,

Mass, m = 0.3 kg

It is placed at a height of, h = 1 m

We need to find the gravitational potential energy of the book. It is given by :

PE = mgh

PE=0.3\ kg\times 9.8\ m/s^2\times 1\ m

PE = 2.94 Joules

So, the potential energy of the book at this height is 2.94 Joules. Hence, this is the required solution.

Sedbober [7]3 years ago
4 0

2.941955 J of energy I think

You might be interested in
A parallel plate capacitor with air between the plates has a potential difference of 71.0 V. Determine the potential difference
Gwar [14]

Answer:

15.8 V

Explanation:

The relationship between capacitance and potential difference across a capacitor is:

q=CV

where

q is the charge stored on the capacitor

C is the capacitance

V is the potential difference

Here we call C and V the initial capacitance and potential difference across the capacitor, so that the initial charge stored is q.

Later, a dielectric material is inserted between the two plates, so the capacitance changes according to

C'=kC

where k is the dielectric constant of the material. As a result, the potential difference will change (V'). Since the charge stored by the capacitor remains constant,

q=C'V'

So we can combine the two equations:

CV=CV'\\CV=(kC)V'\\V'=\frac{V}{k}

and since we have

V = 71.0 V

k = 4.50

We find the new potential difference:

V'=\frac{71.0}{4.50}=15.8 V

6 0
2 years ago
During heavy rain, a section of a mountainside measuring 2.5 km horizontally, 0.80 km up along the slope, and 2.0 m deep slips i
Crank

Answer:

The mass of the mud is 3040000 kg.

Explanation:

Given that,

length = 2.5 km

Width = 0.80 km

Height = 2.0 m

Length of valley = 0.40 km

Width of valley = 0.40 km

Density = 1900 Kg/m³

Area = 4.0 m²

We need to calculate the mass of the mud

Using formula of density

\rho=\dfrac{m}{V}

m=\rho\times V

Where, V = volume of mud

\rho = density of mud

Put the value into the formula

m=1900\times4.0\times0.40\times10^{3}

m =3040000\ kg

Hence, The mass of the mud is 3040000 kg.

4 0
3 years ago
a backpack has a mass of 8 kg. it is lifted and given 54.9 J of gravitational potential energy. how high is is lifted? accelerat
dalvyx [7]
P=mgh
h=P/mg
h=(54.9)/(8*9.8)= 0.7m
8 0
2 years ago
Starting from rest, a particle that is confined to move along a straight line is accelerated at a rate of 5.0 m/s2. Which one of
Elanso [62]

Answer:

c) The slope is not constant and increases with increasing time.

Explanation:

The equation for the position of this particle (starting from rest is)

s = at^2/2 = 5t^2/2 = 2.5t^2

We can take derivative of this with respect to time t to get the equation of slope:

s' = (2.5t^2)' = 2*2.5t = 5t

As time t increase, the slope would increases with time as well.

6 0
3 years ago
To ensure a steady flight, the standard golf ball has nearly 400 ____ or “dimples” on its surface.
Gekata [30.6K]
To ensure a steady flight, the standard golf ball has nearly 400 indentations <span>or “dimples” on its surface. The correct option among all the options that are given in the question is the second option or option "B". The other choices are incorrect. I hope that this is the answer that has actually come to your help.</span>
4 0
3 years ago
Other questions:
  • A stalled car is being pushed up a hill at constant velocity by three people. the net force on the car is
    7·1 answer
  • Which is not an era of the Phanerozoic eon
    14·1 answer
  • Tarzan swings on a 30.0m long vine initially inclined at an angle 37 degrees with the vertical. What is his speed at the bottom
    8·1 answer
  • Based on Kepler's work, which best describes the orbit If a planet around the Sun?
    9·1 answer
  • A carpenter uses a crowbar to remove the top of a box. If the top has a resistance of 500 Newtons, and the carpenter applies an
    15·1 answer
  • A bullet is fired vertically upward a velocity of 80m/s to what height will the bullet rise above the point of projection​
    6·1 answer
  • Ans it fastly <br>i need the ans fastly ​<br>NO SPAM
    11·1 answer
  • the gravitational force acts on all objects in proportion to their mass. neglecting air resistance, why don’t heavy objects fall
    5·1 answer
  • If I want to calculate the normal force of an object on two legs but the weight of the object is not uniform throughout, how do
    11·1 answer
  • “Which type of paper, construction paper or notebook paper, will make a paper airplane travel farther?”
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!