(show your work)What is the net force on the box shown below?
30 N
60 N
20 N
30
60 20
< Square >

Answers

Answer 1

Answer:

Answer:

I don't do physics , I'm sorry can't help you

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A coin rolls across the floor at an angular speed of 4 rotations per second. What is its speed in degrees persecond? Hint: One full rotation equals 360 degrees.

Answers

Speed in degrees per second or angular speed will be 25.13 radian

What is an angular speed?

Angular speed is defined as the rate of change of angular displacement and can be expressed as angular rotation / time

Total number of rotations = 4

one rotation makes an angle of = 360° = 2 π radian

coil is rolling at an angular speed of 4 rotation / second

4 rotations will make = 2π * 4 = 25.13 radian

hence , speed in degrees per second or angular speed will be 25.13 radian

Learn more about angular speed :

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If there are 4 rotations per second and 360 degrees in 1 rotation, the angular speed is 1440 degrees per second. (4 * 360)

Usually angular speed is measured in radians though.

Explain why ultra-high voltages are
used to carry electricity over transmission lines.

Answers

Well, let's take it the other way. If you have a rather low voltage (220 volts -- Europe -- is low) you'd get a high current, which more easily dissipates as heat, resulting in loss of energy. Using a high voltage you have a low current which could easily be transported with almost no loss.

What is the mass of 2.5 mol of Ca, which has a molar mass of 40 g/mol?

Answers

Answer:100 g of ca

Explanation:

The Earlybird communications satellite hovers over the same point on Earth's equator indefinitely. This is because _____. A. its orbital period is 24 hours B. it is beyond the main pull of gravity C. it pulls as hard on Earth as Earth pulls on it D. it is kept aloft by ground control E. forces other than Earth's gravity act on it

Answers

A. its orbital period is 24

The Earlybird ... and every TV satellite ... hovers over the same point
on Earth's equator indefinitely because its orbit is continually adjusted
to ...

-- be in the plane of the equator,

-- be as perfectly circular as possible,

-- have a period exactly equal to the Earth's rotation period ...
about 23 hours 56 minutes 4 seconds, not 24 hours.

A light goes on immediately when you flip a switch because.A. conductors allow electrons to travel extremely quickly from the power source to the light

B. tightly bound electrons are already present in the conductors that make up the circuit

C. loosely bound electrons are already present in the wire conductors that make up the circuit