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
elena-14-01-66 [18.8K]
3 years ago
14

Speed depends on how far something travels and Question 1:

Physics
1 answer:
Yuliya22 [10]3 years ago
4 0

Answer: I think the answer is C

You might be interested in
A heat pump receives heat from a lake that has an average winter time temperature of 6o C and supplies heat into a house having
Natalija [7]

Answer:

Explanation:

60000 kJ / h = 60000 x 1000 / (60 x 60 )

= 16667 J /s

a)

\frac{Q_H}{W} =\frac{T_H}{T_H-T_C}

where Q_H and W are heat supplied and heat given from  outside source .

Here Q_H = 16667 J/s

\frac{T_H}{T_H-T_C}=\frac{298}{298-279}

= 15.684

Q_H = 16667 J/s

16667 / W = 15.684

W= minimum power supplied  = 1062.7 W.

b )

If  T_C=283K

\frac{T_H}{T_H-T_C}=\frac{298}{298-283}

=19.87

\frac{Q_H}{W} = 19.87

W=\frac{Q_H}{19.87}

W=\frac{16667}{19.87}

= 838.8 W .

4 0
4 years ago
Which option is an example of chemical energy being transformed into thermal energy?
mylen [45]

Answer:

d

Explanation:

3 0
3 years ago
Read 2 more answers
Tycho's major contribution to astronomy was ___________________?
Rina8888 [55]

Answer:

He is known primarily for being one of the people who worked to overturn the widespread belief that our universe orbits geocentrically in favor of a heliocentric model.

Explanation:

4 0
3 years ago
An unknown mineral is scratched by a penny. It must _____.
Tanya [424]
The answer is a I think
8 0
4 years ago
Read 2 more answers
An athlete is running a 400m race around a 400m track. On the backstretch the athlete's velocity is 8m/s but he is running into
Aleksandr-060686 [28]

Answer:

33 N

Explanation:

v = Velocity of fluid = 8+2 = 10 m/s

\rho = Density of fluid = 1.2 kg/m³

C = Coefficient of drag = 1.1

A = Cross sectional area = 0.5 m²

Drag force is given by

F=\frac{1}{2}\rho CAv^2\\\Rightarrow F=\frac{1}{2}\times 1.2\times 1.1\times 0.5\times (8+2)^2\\\Rightarrow F=33\ N

The drag force on the athlete is 33 N

3 0
3 years ago
Other questions:
  • Explain how the absorption of sound waves differs from the transmission of sound waves.
    8·1 answer
  • What is the route number for ( 697 and 129 )
    6·1 answer
  • What did Edwin Hubble discover that supported the Big Bang Theory?
    8·1 answer
  • If a horse does 4000j of work over 20m how much force does the horse use
    12·1 answer
  • A cyclist travels at an average rate of 10 m/s. How long will it take him to travel a distance of 10 km at this rate?
    9·1 answer
  • Two shuffleboard disks of equal mass, one orange and the other yellow, are involved in an elastic, glancing collision. The yello
    7·1 answer
  • A 3-m-high, 8.5-m-wide rectangular gate is hinged at the top edge at A and is restrained by a fixed ridge at B. Determine the hy
    6·1 answer
  • What is the biggest current disadvantage to using gas hydrates as a form of energy?
    5·2 answers
  • A 6.0-kg block slides from point A down a frictionless curve to point B. After the block passes point B, a friction force oppose
    9·2 answers
  • Define a medium and state what type of medium sound energy would travel the fastest in
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!