ANALOGY: Mars bar: planet as Milky Way: __________

Physics

1 answer:

strojnjashka [21]3 years ago

4 0

Galaxy is the answer

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What is the weight of an object on the earth with a mass of 70 kg. <br> (g= 10 m/s2)

Sphinxa [80]

Answer:

700N

Explanation:

mass= 70kg

g=10m/s²

weight=mg

=70×10

=700N

5 0

2 years ago

Driving home from school one day, you spot a ball rolling out into the street (Figure 5-21). You brake for 1.20 s, slowing your

frosja888 [35]

A ) v = v o + a t ( the acceleration will be negative )
9.50 = 16.0 + a * 1.2
a * 1.2 = -16.0 + 9.50
a * 1.2 = - 6.5
a = - 6.5 : 1.2
a = - 5.4167 m/s²
F = m * a = 950 kg * 5.4167 m/s²
F = 5,145.8 N ( the average force exerted on a car during braking )
b ) d = v o - a t² / 2
d = 16.0 * 1.2 - ( 5.4167 * 1.2² / 2 ) =
= 19.20 - 3.90 = 15.30 m

7 0

3 years ago

A dc motor with its rotor and field coils connected in series has an internal resistance of 3.2 Ω. When running at full load on

pochemuha

Answer:

The current drawn by the motor from the line is 4.68 A.

Explanation:

Given that,

Internal resistance of the dc motor, r = 3.2 ohms

Voltage, V = 120 V

Emf in the motor, $\epsilon=105\ V$

We need to find the current drawn by the motor from the line. A dc motor with its rotor and field coils connected in series, applying loop rule we get :

$V=\epsilon+Ir$