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
liq [111]
4 years ago
6

Usain Bolt accelerates at a rate of 3.7

Physics
1 answer:
MissTica4 years ago
4 0

Answer:

Explanation:

I think that you to run more than 12 miles

You might be interested in
5 single loop of copper wire, lying flat in a plane, has an area of 8.60cm2 and a resistance of 3.00. A uniform magnetic field p
Finger [1]

Answer:

0.652 mA

Explanation:

According to Faraday's Law :

Emf = -  \frac{d \phi}{dt}

= \frac{- \delta \phi }{\delta \ t}

|E| = \frac{A ( \delta B)}{\delta t}

where ;

A = 8.60*10^{-4}

\delta B = 3.00 T - 0.5 T = 2.5 T

|E| = \frac{8.60*10^{-4}*2.5}{1.10}

|E| = 1.96*10^{-3}

Induced current  I = \frac{|E|}{R}

= \frac{1.96*10^{-3}}{3.0}

= 6.52*10^{-4} A

= 0.652 mA

Thus, the induced current in the loop of wire over this time = 0.652 A

4 0
3 years ago
A supersonic aircraft flies at 3 km altitude at a speed of 1000 m/s on a standard day. How long after passing directly above a g
Gre4nikov [31]

Answer:

<h3>After 3seconds</h3>

Explanation:

A supersonic aircraft flies at 3 km altitude at a speed of 1000 m/s on a standard day. How long after passing directly above a ground observer is the sound of the aircraft heard by the ground observer

Using the formula for calculating speed expressed as;

Speed = Distance/Time

Given;

Distance = 3km = 3000m

Speed = 1000m/s

Required

How long after passing directly above a ground observer is the sound of the aircraft heard by the ground observer (Time)

From the formula;

Time = Distance/speed

Time = 3000/1000

Time = 3seconds

Hence the sound of the aircraft is heard after 3 seconds

7 0
3 years ago
What does the doppler effect tell astronomers about the universe
Luden [163]
The doppler effect has red and blue shifts. A red shift means something is moving farther away, and a blue shift means it is moving closer. The universe has a red shift, and since a red shift means that it is moving farther away, this tells astronomers that the universe is still expanding.
7 0
3 years ago
Grain is pouring into a silo to be stored for later use. Due to the friction between pieces of grain as they rub against each ot
jolli1 [7]

Answer:

The electric force between them if the pieces of grain are 2 cm apart is 3.15\times 10^{-11}\textrm{ N}.

Explanation:

Given:

Charge on one grain, Q_{1}=6\times 10^{-10}\textrm{ C}

Charge on another grain, Q_{2}=2.3\times 10^{-15}\textrm{ C}

Separation between them, d=2\textrm{ cm}=0.02\textrm{ m}

Electric force acting between two charges Q_{1}\textrm{ and }Q_{2} separated by a distance d is given as:

F_{elec}=\frac{kQ_{1}Q_{2}}{d^2}

Where, k is Coulomb's constant equal to 9\times 10^9\textrm{ }Nm^2/C^2.

Now, plug in all the values and solve for F{elec}.

F{elec}=\frac{9\times 10^9\times 6.0\times 10^{-10}\times 2.3\times 10^{-15}}{(0.02)^2}\\\\F_{elec}=3.15\times 10^{-11}\textrm{ N}

Therefore, the electric force between them if the pieces of grain are 2 cm apart is 3.15\times 10^{-11}\textrm{ N}.

3 0
3 years ago
What is the heat-loss rate through the slab if the ground temperature is 5 ∘C while the interior of the house is 25 ∘C?
Gala2k [10]

Complete question :

A 12 m x 15 m house is built on a 12-cm-thick concrete slab.

What is the heat-loss rate through the slab if the ground temperature is 5°C while the interior of the house is 25°C

Answer:

3kW

Explanation:

Given the following :

Dimension of house :

Length = 12m

Width = 15m

Thickness of concrete slab (t) = 12cm

t in metres :

100cm = 1m

12cm = (12/100)m

= 0.12m

Ground temperature (Tg) = 5°C

Interior temperature = (Th) = 25°C

Thermal conductivity of concrete (K) is approximately 1 Wm/k

Using the relation:

Q = KA * [ (Th - Tg) / d]

A = Length * width = (12 *15) = 180

Q = (1 * 180) * [(25°C - 5°C) / 0.12]

Q = 180 * (20/0.12)

Q = 180 * 16.6666

Q = 3,000W = 3kW

3 0
4 years ago
Other questions:
  • Use at least two to three completed content related sentences to explain why physics is considered the basic science. Provide at
    5·2 answers
  • One card is randomly selected from a deck of cards. Find the odds against drawing a spade greater than 2 and less than 7.
    5·2 answers
  • A ___ is a point on a standing wave that appears to be stationary
    13·2 answers
  • One day at soccer practice, you kick a ball hard and it rolls across the grass. It eventually comes to a stop because
    13·2 answers
  • Which of these is true about the possible number of compounds that can be formed?
    15·2 answers
  • Name any two medium which states about the weather report.
    10·1 answer
  • A car travels along a highway with a velocity of 24 m/s, west. The car exits the highway; and 4.0 s later, its instantaneous vel
    13·1 answer
  • For a block to move down an inclined plane what force has to be the greatest?
    5·1 answer
  • Two bricks are resting on the edge of the lab table. Shirley Sheshort stands on her toes and spots the two bricks. She acquires
    11·1 answer
  • A car increases its speed from 11.1 meters per second to 24.2 meters per second in 5.0 seconds. What is the average acceleration
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!