All categories

3 years ago

PHYSICS HELP PLEASE!! MUST SHOW MATH WORK!!

Physics

1 answer:

SVETLANKA909090 [29]3 years ago

6 0

Answer:

1) Distance traveled by bird = 403 meter

2)Average speed = 1.66 km /hour

3) Zcceleration = 2 $m/s^2$

Explanation:

1) Distance traveled = Speed * Time taken = 31 * 13 = 403 meter.

2) Average speed = Total distance covered / Time taken for that distance to cover.

Total distance covered = 2+0.5+2.5 = 5 km

Time taken = 3 hours

Average speed = 5/3 = 1.66 km /hour

3) Acceleration is defined as the rate of change of velocity, so acceleration a = change in velocity/time.

Change in velocity = 14 - 6 = 8 m/s

Time = 4 seconds

So acceleration = 8 / 4 = 2 $m/s^2$

You might be interested in

A bus start from rest and then moves with a constant acceleration of 2m/s square. calculate its time of traven if its final velo

pshichka [43]

Answer:

Its Answer is 10 s.

Explanation:

As acceleration is defined as time rate of change of velocity. So,

a = $( vf - vi )$ ÷ t

2 = (20 - 0 ) ÷ t

2 = 20 ÷ t

t = 20 ÷ 2

t = 10 s

We have put initial velocity as zero because body is starting from rest.

Hope it helps.

5 0

3 years ago

A balanced 3-wire, 120/240V, single-phase circuit is connected so that the ungrounded conductors are from different transformer

sasho [114]

Answer:

$0\%$

Explanation:

A 3-wire, 120/ 240 V circuit from a three-phase delta transformer contains two ungrounded conductors and one grounded conductor. The grounded conductor carries the unbalanced current when the circuit is not balanced.

A neutral conductor has the same equal potential between it and all ungrounded conductors of a 3-wire system.

The current on the neutral conductor is $0\%$ percent of the ungrounded conductor current.

6 0

4 years ago

A balsa wood raft is 1.50 m long, 1.00 m wide, and 0.120 m high. the density of balsa is 380 kg/m^3. what is the mass of the raf

topjm [15]

Answer:

the mass of the raft is 68.4 kg

Explanation:

Since Mass is defined as Volume times Density, start by calculating the volume of the raft:

Volume = length x width x high = 1.5 m x 1.0 m x 0.12 m = 0.18 m^3

and now multiply it times the given density in order to find its mass:

Mass = Volume x Density = 0.18 m^3 x 380 kg/m^3 = 68.4 kg.

Notice that the m^3 units cancel out (they are in numerator and in denominator) leaving just the kg (a unit of mass) in the answer.

Therefore, the mass of the raft is 68.4 kg

4 0

4 years ago

A device that transforms electrical energy to mechanical energy is a

yarga [219]

Answer:

Electric Motor

Explanation:

There are mainly two types of machines for inter-conversion between mechanical energy and electrical energy as under:

Motor
Generator

Motor is a device which converts electrical energy into a mechanical whereas generator does the exact opposite of motor.

There are 2 types of motors:

AC Motor - Converts alternating current into mechanical energy

DC Motor - Converts direct current into mechanical energy

4 0

4 years ago

What household items are capacitors used in?

Aleonysh [2.5K]

Vietually every electronic device in widespread use contains some form of capacitors .used to store electricity capacitor aften help computer avoid losing their memory when the batteries an being recharged other device such as amplifiers for car steroeos contain capacitor that store energy until it is nedded by the amplifier motiondetector use capacitor to help achieve the proper timing of the until circuit.

3 0

3 years ago

Read 2 more answers