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Ganezh [65]
3 years ago
5

4. Going down the freeway you notice your tachometer reads 4,000 RPM. a) Convert

Physics
1 answer:
valentina_108 [34]3 years ago
7 0

a). Frequency = (4,000 rev/minute)·(1 minute/60 sec) = <em>66 and 2/3 rev/sec</em>

b). Period = 1 / frequency

Period = 1 / (66-2/3 rev/sec)

Period = 1/66-2/3  sec/rev

<em>Period = 0.015 sec/rev </em>

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Assignment: Can you identify various forces and instances in which electrostatic and magnetic forces occur​
serg [7]

Answer:

Magnetic force, attraction or repulsion that arises between electrically charged particles because of their motion. It is the basic force responsible for such effects as the action of electric motors and the attraction of magnets for iron. Electric forces exist among stationary electric charges; both electric and magnetic forces exist among moving electric charges. The magnetic force between two moving charges may be described as the effect exerted upon either charge by a magnetic field created by the other.

3 0
2 years ago
A garage door opener has a power rating of 350 watts.
Lelechka [254]
We Know, Power = Energy/Time
Substitute the known value. which is P = 350 watt, & T = 30 sec
350 = E/30 
E = 350 * 30
E = 1050 Joules.

So, your answer is 1050 Joules.
Hope this helps! Keep studying! 
6 0
3 years ago
Read 2 more answers
A net force of 6.8 N accelerates a 31 kg scooter across a level parking lot. What is the magnitude of the scooter’s acceleration
mrs_skeptik [129]

Answer:

a)0.22 m/s².

Explanation:

Given that

Net force ,F= 6.8 N

mass ,m = 31 kg

From the second law of Newton's

F = m a   ---------------1

Where

F=Net force ,m=mass

a=Acceleration

Now by putting the values in the equation 1

F = m a

6.8 = 31 x a

a=\dfrac{6.8}{31}\ m/s^2

a = 0.219\ m/s^2

a = 0.22\ m/s^2

Therefore the acceleration of the scooter will be 0.22 m/s².

The answer will be "a".

a)0.22 m/s².

3 0
3 years ago
14
labwork [276]

Answer:

D. protons and neutrons

3 0
3 years ago
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A 2.45 g table tennis ball has the KE of 31.5 J. At what velocity is the tennis ball traveling?
Ket [755]
KE =
\frac{1}{2} mv {}^{2}
Convert g in kg
Find v:
2KE = mv^2
v=√2KE/m
v=√2*31.5/0.00245
v=160 m/s

3 0
3 years ago
Read 2 more answers
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