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
Montano1993 [528]
3 years ago
8

A sled is moving at a constant speed down a surface inclined at 45.0° with the horizontal and travels 30 meters in 4 seconds. Ca

lculate the vertical velocity of the sled at the end of 4 seconds.
Physics
1 answer:
slamgirl [31]3 years ago
5 0
To obtain the vertical component of the velocity, it is necessary to multiply the velocity at this time by sin 45 degrees. Since the velocity is not given, it must be solved first by dividing the distance by the time. To show this:

Velocity = distance / time
Velocity = 30 m / 4s
Velocity = 7.5 m/s

Vertical velocity = 7.5 sin 45
Vertical velocity = 5.3 m/s
You might be interested in
HELPPP TIMED The etiology of somatoform disorders may consist of all of the following except __________ factors.
meriva

Answer:

b. biologucal

Explanation:

it is b. biologucal

8 0
3 years ago
Read 2 more answers
A single sports fan is capable of yelling at an intensity level of 80 dB from a given distance. If 10,000 similar fans were all
riadik2000 [5.3K]

Answer: option "A" is correct

Explanation: the closet to understand the intensity level will be from 80db (decibels) upwards. So option a which is 84db is the answer. Thank you.

4 0
3 years ago
Read 2 more answers
a 300-kg crate is placed on a adjustable incline plane. as one end of the incline is raised, the crate begins to move downward.
denis-greek [22]

Answer:

A 300-kg crate is placed on a adjustable incline plane. as one end of the incline is raised, the crate begins to move downward. if the crate slides down the plane with the acceleration of .70 m/s2 , when the incline is 25 degrees, what is the coefficient of kinetic friction between ramp and crate?

Explanation:

6 0
3 years ago
Evaluate the use of hydrogen as a fuel. Explain how hydrogen is produced. Write about the environmental impact of using diesel a
posledela

Explanation:

Hydrogen is used as a fuel because it has a high calorific value per molecule when burned in air and also burns explosively. When burned in air, it reacts with oxygen to produce water  which is safe for the environment. This same property of hydrogen of high explosiveness makes it difficult to store safely.  

Hydrogen can be produced through the electrolysis of water. However this is high energy consuming. The most common method is called steam-methane reforming. Methane from hydrocarbon is mixed with steam under high pressure and reacts to produce hydrogen and carbon monoxide.

Diesel and petrol and other petroleum products when burned produce carbon dioxide which is a greenhouse gas. Greenhouse gases when increasing in the atmosphere, cause greenhouse effect that results in global warming.

Learn More:

For more on hydrogen fuel check  out;

brainly.com/question/2666329

#LearnWithBrainly

8 0
3 years ago
1) What proportion of U.S. energy today comes from renewable sources? What is the most prevalent form of renewable energy used i
Rudik [331]

Answer:

Eighteen percent

Explanation:

Eighteen percent of all electricity in the US is sourced from renewable energy ,which includes solar , wind, and hydroelectric dam.

Hydroelectric power is currently the largest producer of renewable electricity in the US, generating around 6.5% of the nation's total electricity  as well as 45.71% of the total renewable electricity generation.The United States is the fourth largest producer of hydroelectricity in the world after China, Canada and Brazil.

8 0
3 years ago
Other questions:
  • What kind of water temperature lowers the dissolved oxygen
    11·2 answers
  • Calculate the wavelengths of the first five members of the Lyman series of spectral lines, providing the result in units Angstro
    6·1 answer
  • Which multiplier does the word kilo represent? A. 100 B. 1,000 C. `(1)/(100)` D. `(1)/(10)`
    10·1 answer
  • How does a crowbar work?
    11·1 answer
  • A ______ is something that can be placed between the sun and the subject to diffuse the light. *
    14·2 answers
  • 2)It is known that the connecting rodS exerts on the crankBCa 2.5-kN force directed down andto the left along the centerline ofA
    6·1 answer
  • A. If a T-Rex runs 20 meters in 4 seconds, what is it’s average speed?
    11·1 answer
  • A tank is 3 m long 1 m wide and 0.5 m deep is filled with oil which weighs 12000 N
    12·1 answer
  • In this football play the quarterback keeps the ball and goes straight ahead, behind the blocking of the center and the guards.
    10·1 answer
  • How must the height of A relate to the height of B for the skateboarder to have just enough energy to complete the loop?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!