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
mart [117]
2 years ago
10

Geologists use the blank test to determine the hardness of a mineral

Physics
1 answer:
Ludmilka [50]2 years ago
8 0
Geologists use the Mohs Harness Scale (aka the Scratch Test) to determine the hardness of a mineral.

For more info, check out http://geology.com/minerals/mohs-hardness-scale.shtml
You might be interested in
A ball is thrown upward from the top of a building at an angle of 30.0° to the horizontal and with
Ray Of Light [21]

Answer:

See below

Explanation:

Vertical position = 45 +  20 sin (30) t  - 4.9 t^2

 when it hits ground this = 0

               0 = -4.9t^2 + 20 sin (30 ) t + 45

                0 = -4.9t^2 + 10 t +45 = 0     solve for t =4.22 sec

  max height is at  t= - b/2a = 10/9.8 =1.02

     use this value of 't' in the equation to calculate max height = 50.1 m

      it has  4.22 - 1.02 to free fall = 3.2 seconds free fall

           v = at = 9.81 * 3.2 = 31.39 m/s VERTICAL

      it will <u>also</u> still have horizontal velocity =  20 cos 30 = 17.32 m/s

        total velocity will be sqrt ( 31.39^2 + 17.32^2) = 35.85 m/s

Horizontal range = 20 cos 30  * t  =  20 *  cos 30  * 4.22 = 73.1 m

8 0
1 year ago
A tow truck exerts a net horizontal force of 1050 N on a 760-kg car. What is the acceleration of the car during this time?
vovikov84 [41]
We can solve the problem by using Newton's second law of motion:
F=ma
where
F is the net force applied to the object
m is the object's mass
a is the acceleration of the object

In this problem, the force applied to the car is F=1050 N, while the mass of the car is m=760 kg. Therefore, we can rearrange the equation and put these numbers in, in order to find the acceleration of the car:
a= \frac{F}{m}= \frac{1050 N}{760 kg}=1.4 m/s^2

The equation also tells us that the acceleration and the force have same directions: therefore, since the force exerted on the car is horizontal, the correct answer is
<span>B) 1.4 m/s2 horizontally.</span>
5 0
3 years ago
A remote-controlled car is moving in a vacant parking lot. The velocity of the car as a function of time is given by υ⃗ =[5.00m/
Reptile [31]
It would possibly be [7.00m/s(0.5613m/s)
8 0
2 years ago
How are mechanical waves and electromagnetic waves alike?
miss Akunina [59]

I got this answer from the internet

6 0
2 years ago
Read 2 more answers
A student carries a very heavy backpack. To lift the backpack off the ground, the student must apply 80 N of force to do so. The
Xelga [282]

The work done on the backpack by the student applies 80 N of force to lift the backpack 1.5 m is 120J.

<h3>How to calculate work done?</h3>

Work done is a measure of energy expended in moving an object; most commonly, force times distance.

It is said that no work is done if the object does not move, hence, the work done on an object can be calculated as follows:

Work done = Force × Distance

According to this question, a student carries a very heavy backpack and to lift the backpack off the ground, the student must apply 80 N of force to lift the backpack 1.5 m.

Work done = 80N × 1.5m

Work done = 120J

Therefore, the work done on the backpack by the student applies 80 N of force to lift the backpack 1.5 m is 120J.

Learn more about work done at: brainly.com/question/28172139

#SPJ1

8 0
1 year ago
Other questions:
  • The energy derived from the disgusting of food
    9·1 answer
  • Which of the following is an example of mechanical weathering
    9·1 answer
  • A sample of an unknown liquid has a volume of 12.0mL and a mass of 6g. What is the density
    11·1 answer
  • Center of low pressure are called
    9·2 answers
  • The worked examples of charged-particle motion are relevant to:______. a. a transistor. b. a cathode-ray tube. c. magnetic reson
    11·1 answer
  • What is weight vs mass
    15·1 answer
  • How to determine the amount of resistance when two or more resistors are in parallel.
    15·1 answer
  • Which of these is a mechanical wave
    10·1 answer
  • Think about the difference between thermal energy and temperature. How might the melting icicles gain energy without changing te
    7·1 answer
  • The body is subjected to a force of 0,4 N m with a shoulder of 5 cm. What is the magnitude of this force?​
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!