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 0.40 kg bead slides on a straight frictionless wire with a velocity of 3.50 cm/s to the right. The
tensa zangetsu [6.8K]

Answer:

Total momentum before collision

P1 =.4 * 3.5 = 1.4       ignoring units here

Total momentum after collision

P2 = .6 * V - .4 * .7 = .6 V - .28

.6 V = 1.4 + .28   momentum before = momentum after

V = 2.8 cm/sec

In 5 sec V moves 2.8 cm/sec * 5 sec = 14 cm

5 0
3 years ago
A dust particle floats in front of a silent loudspeaker as shown in the figure. The loudspeaker is turned on and plays a constan
dybincka [34]

Answer:tbh idk

Explanation:

tbh idk

8 0
3 years ago
Read 2 more answers
Researchers in the Antarctic measure the temperature to be -32°F. What is this temperature on the following scales?(a) the Celsi
Illusion [34]
Answer:

a) -35.6°C

b) 237.4 K

Explanation:

To convert temperature from degree celsius to degree fahrenheit, use the formula below:

T_c=\frac{5}{9}(T_f-32)

a) Therefore to convert -32°F to celsius, substitute it into the celsius

\begin{gathered} T_c=\frac{5}{9}(-32-32) \\  \\ T_c=\frac{5}{9}(-64) \\  \\ T_c=-35.6^0C \end{gathered}

b) To covert to the Kelvin scale, use the formula below

\begin{gathered} T_k=T_c+273 \\  \\ T_k=-35.6+273 \\  \\ T_k=237.4K \\  \end{gathered}

8 0
1 year ago
Paul’s 10 kg baby sister Susan sits on a mat. Paul pulls the mat across the floor using a rope that is angled 30° above the floo
kiruha [24]

Answer:

The speed of Susan is 2.37 m/s

Explanation:

To visualize better this problem, we need to draw a free body diagram.

the work is defined as:

W=F*d*cos(\theta)

here we have the work done by Paul and the friction force, so:

W_p=F_p*d*cos(0)\\F_p=30N*cos(30^o)=26N\\W_p=26*3*(1)=78J

W_f=F_f*d*cos(180)\\F_f=\µ*(10*9.8-30N*sin(30^o))=16.6N\\W_p=16.6*3*(-1)=50J

Now the change of energy is:

W_p-W_f=\frac{1}{2}m*v^2\\v=\sqrt{\frac{2(78J-50J)}{10kg}}\\v=2.37m/s

4 0
3 years ago
Read 2 more answers
A dumbell has a mass of 95 kg. What force must be applied to accelerate it upward at 2.2 m/s2?
Sveta_85 [38]
A :-) F = ma
Given - m = 95 kg
a = 2.2 m/s^2
Solution -
F = ma
F = 95 x 2.2
F = 209

.:. The force is 209 N
5 0
3 years ago
Other questions:
  • A parcel of air is being forced up the windward side of a 7,000-foot-high mountain. The parcel has a temperature of 91.0°F at 0
    10·1 answer
  • If a topographic map included a 6,000 ft. mountain next to an area of low hills, which would best describe the contour lines on
    8·1 answer
  • A balloon has a volume of 10,500 liters, and the temperature is 15°C. If the temperature were -25°C, what would the volume of th
    9·1 answer
  • What volume of .2500 m cobalt iii chloride is required to react completely with 25 ml of .0315 m calcium hydroxide?
    13·1 answer
  • The law of reflection states that if the angle of incidence is 76 degrees, the angle of reflection is ___ degrees.
    7·1 answer
  • What distinguishes mass from weight?
    9·2 answers
  • A spring-loaded pellet gun is designed to fi re 3.00-g projectiles horizontally at a speed of 45.0 m/s. (a) If the spring is com
    5·1 answer
  • If a material, such as concrete, can withstand a large applied weight but gives away (ruptures) quickly when a crack forms, then
    14·2 answers
  • In a series circuit with three bulbs,
    6·2 answers
  • A chef fills 50cm3 container with 250g of cooking oil what is the density of the oil?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!