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
spin [16.1K]
2 years ago
13

A 50.0kg box is being pushed along a horizontal surface by a force of 250N directed 28 degrees below the horizontal. The coeffic

ient of kinetic friction between the box and the surface is 0.300. What is the acceleration of the box?
A) 0.769 m/s^2
B) 1.77m/s^2
C) 3.16m/s^2
D) 6.31m/s^2
E) 8.53m/s^2
Physics
1 answer:
tester [92]2 years ago
5 0
The answer is c. that was a tough question
You might be interested in
10.
myrzilka [38]

Answer:

<em>The new period of oscillation is D) 3.0 T</em>

Explanation:

<u>Simple Pendulum</u>

A simple pendulum is a mechanical arrangement that describes periodic motion. The simple pendulum is made of a small bob of mass 'm' suspended by a thin inextensible string.

The period of a simple pendulum is given by

T=2\pi \sqrt{\frac{L}{g}}

Where L is its length and g is the local acceleration of gravity.

If the length of the pendulum was increased to 9 times (L'=9L), the new period of oscillation will be:

T'=2\pi \sqrt{\frac{L'}{g}}

T'=2\pi \sqrt{\frac{9L}{g}}

Taking out the square root of 9 (3):

T'=3*2\pi \sqrt{\frac{L}{g}}

Substituting the original T:

T'=3*T

The new period of oscillation is D) 3.0 T

4 0
2 years ago
In which of the following does personality psychology specialize?
ValentinkaMS [17]
B, Studying how ones' character changes over time... That's the only one that has to deal with personality. 
5 0
3 years ago
Read 2 more answers
Entropy measures _____.<br> a. disorder<br> b. energy<br> c. heat transferred<br> d. force
11111nata11111 [884]
Entropy measures disorder and nothing else
8 0
3 years ago
Read 2 more answers
On the planet Xenophous a 1.00 m long pendulum on a clock has a period of 1.32 s. What is the free fall acceleration on Xenophou
Vilka [71]
The period of the pendulum is given by the following equation

T = 2π * sqrt (L/g)

Where g is the gravity (free fall acceleration)

L is the longitude of the pendulum

T is the period.

We find g.............> (T /2π)^2 = L/g

g = L/(T /2π)^2...........> g = 22.657 m/s^2
3 0
3 years ago
Urgent!!!!!! 20 points!!!!!!<br> how are the speed, wavelength and frequency of a wave related
zheka24 [161]

Answer:

The higher the frequency, the shorter the wavelength. Because all light waves move through a vacuum at the same speed, the number of wave crests passing by a given point in one second depends on the wavelength. Speed shows how long it takes for wavelengths to travel.

6 0
3 years ago
Other questions:
  • Consider an optical cavity of length 40 cm. Assume the refractive index is 1, and use the formula for Icavity vs wavelength to p
    13·1 answer
  • How can eclipsing binary stars be identified?
    14·1 answer
  • you are running at a rate of 8 meters per second west. You ran a total distance of 400 meters. how long did it take to complete
    10·1 answer
  • True or False? In the quark era, it was so hot that matter and
    9·1 answer
  • A 0.041-kg bullet has a kinetic energy of 600j. What is the velocity of the bullet?
    13·1 answer
  • A professor, with dumbbells in his hands and holding his arms out, is spinning on a turntable with an angular velocity. What hap
    10·1 answer
  • An object weighs 15N in air and 13N when completely
    10·1 answer
  • Albert Bandura’s theory, originally called social learning theory, is now referred to as __________, and it suggests cognitive p
    13·2 answers
  • How long would it take a boat that started at rest to get to a velocity of 56 m/s if it was accelerating at 17 m/s/s?
    8·1 answer
  • David is investigating the properties of soil using the sample shown.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!