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2 years ago

What is the angular speed of the tip of the minute hand on a clock, in rad/s?

Physics

1 answer:

satela [25.4K]2 years ago

8 0

Answer:

0.10472 radians/minute

Explanation:

It completes a full rotation around that circular clock in 60 minutes. So the angular speed of the minute hand is 2 * pi / 60 = pi / 30 = 0.10472- radians/minute .

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4. An applied force of 6.2 N acts on a 2.1-kg object, pushing it horizontally across a surface

Rama09 [41]

The frictional force on the body is 0.25 N the net force on the body is 5.95 N while the acceleration produced is 2.83 m/s^2

<h3>What is the net force?</h3>

The net force is used to describe the resultant force that acts on the object.

The frictional force that acts on the object s obtained from;

Ff = 0.15 * 2.1-kg * 9.8 m/s^2

Ff = 0.25 N

The net force that acts on the body = F - Ff where F is the applied the force

= 6.2 N - 0.25 N

Net force = 5.95 N

Now;

Net force = ma

a= Net force /m

a = 5.95 N/2.1-kg

a = 2.83 m/s^2

Learn more about the net force:brainly.com/question/18031889

#SPJ1

5 0

2 years ago

Prove that the volume of a cube that moves with a velocity vin

liq [111]

Answer:

Proof is given below

Explanation:

The length contraction is given by Δx = Δx' *√(1 - v² / c²)

where Δx' is the proper length and is measured in the frame where the object is at rest

Since the y' and z' axes are perpendicular to the direction of motion there is no contraction

So if you let V0 = Δy' * Δz' *Δx'

and V = Δy * Δz * Δx = Δy'* Δz' * Δx

Then

V = V0 * √(1 - v² / c²)

6 0

4 years ago

The resistanceless inductor is connected across the ac source whose voltage amplitude is 24.5 V and angular frequency is 850 rad

timurjin [86]

Answer:

Part A 2.88 A, PART B 28.82 mA PART C 0.288 mA

Explanation:

We have given angular frequency $\omega =850rad/sec$

Voltage source has an amplitude of 24.5 V, So V= 24.5 volt

Part A

We have given inductance $L=10^{-2}H$

So inductive reactance $X_L=\omega L=850\times 10^{-2}=8.5ohm$

So current $i=\frac{V}{X_L}=\frac{24.5}{8.5}=2.8823A$

Part B

We have given inductance $L=1 H$

So inductive reactance $X_L=\omega L=850\times 1=850ohm$

So current $i=\frac{V}{X_L}=\frac{24.5}{850}=28.82mA$

Part C

We have given inductance $L=100 H$

So inductive reactance $X_L=\omega L=850\times 100=85000ohm$

So current $i=\frac{V}{X_L}=\frac{24.5}{85000}=0.288mA$

8 0

3 years ago

Identifying Applications of Electromagnetic Waves

Anuta_ua [19.1K]

Answer:

gamma ray-destruction of cancer cells

Ultraviolet wave-disruption of DNA

X-ray-diagnosis of illnesses through medical

Explanation: on edg

4 0

3 years ago

How many does the UK have of nuclear power stations

DIA [1.3K]

Answer: 11

Explanation: In addition to nuclear reprocessing units at Sellafield and Urenco's Tails Management Facility (TMF) in Capenhurst, the UK has 11 active nuclear reactors in five locations (10 advanced gas-cooled reactors (AGR) and one pressurised water reactor (PWR)).

Please give brainliest or whatever brainlyest if this has helped :)

7 0

3 years ago