All categories

3 years ago

Which of the following exerts gravity?

Physics

2 answers:

andreev551 [17]3 years ago

8 0

Any object with mass

stellarik [79]3 years ago

7 0

any object with mass exerts gravity

You might be interested in

A small metal ball is given a negative charge, then brought near to end A of an insulating rod. What happens to end A of the rod

Gwar [14]

Answer:

Weak attraction will be observed

Explanation:

This is because the charge induction is less than the insulating rod, and a postive charge is induced when a a negative sphere is placed closed to the end of the rod

8 0

4 years ago

A tank holds a 1.44-m thick layer of oil that floats on a 0.98-m thick layer of brine. Both liquids are clear and do not intermi

denpristay [2]

Answer:

Angle of ray makes with the vertical is 62.1 degree

Explanation:

As per the ray diagram we know that the angle of incidence on oil brine interface will be given as

$tan\theta_i = \frac{0.7}{0.98}$

$\theta_i = 35.5^0$

now by Snell'a law at that interface we have

$\mu_1 sin\theta_i = \mu_2 sin \theta_r$

now we will have

$1.52 sin35.5 = 1.40 sin\theta_r$

$\theta_r = 39.12^0$

now this is the angle of incidence for oil air interface

so now again by Snell's law we will have

$\mu_2 sin\theta_i' = \mu_{air} sin\theta$

$1.40 sin39.12 = 1 sin\theta$

$\theta = 62.1^0$

3 0

3 years ago

A Keystone Pipeline has a diameter of 36 inches and a design flow rate of 590,000 barrels per day of crude oil at 40ºC. Estimate

Sav [38]

Answer:

Power = 606.83 hp/mile

Explanation:

Given data:

diameter of pipeline is 36 inches = 3ft

flow rate is 590,000 barrels per day = 28.755 ft^3/sec

temperature of pipe = 46 degree celcius

length of pipe is 1.9 mile = 10032 ft

velocity of flow $= \frac{28.755}{\frac{\pi}{4} 3^2} = 4.068 ft/s$

applying bernouli eq at two point in pipeline

P1 = P2

v1 = v2

z1 = z2 so we have

$h_{in} = h_f$

$h_{in} = \frac{ flv^2}{2gD}$

$h_{in} = \frac{0.0155 \times 10032 \times 4.068^2}{2\times 32.174 \times 3}$

$h_{in} = 13.32 ft$

POwer $P = \rho gQ h_{in}$

$P = 53.71 \times 32.174 \times 27.755 \times 13.32 = 634141.29 ldf ft/sec$

Power P = 1152.99 hp 0

power needed for each mile $= \frac{1152.99}{1.9} = 606.83 hp/mile$

4 0

4 years ago

What happens in terms of energy when a moving car hits a parked car, causing the parked car to move?

adelina 88 [10]

<span>that for every action there is an equal and opposite reaction. This means that forces happen in pairs for every interaction there is an object that causes the force and an object that is affected by it. So newtons 3rd law I would say.</span>

7 0

4 years ago

An AC generator has 80 rectangular loops on its armature. Each loop is 12 cm long and 8 cm wide. The armature rotates at 1200 rp

Sauron [17]

Answer: 28.96 V

Explanation:

Given

No of loops on the armature, N = 80

Length of the loop, l = 12 cm = 0.12 m

Width of the loop, b = 8 cm = 0.08 m

Speed of the armature, 1200 rpm

Magnetic field of the loop, B = 0.30 T

To solve this, we use the formula

V(max) = NBAω

Where,

A = area of loop

A = l*b = 0.12 * 0.08

A = 0.0096 m²

ω = 1200 rpm = 1200 * 2π/60 rad/s

ω = (1200 * 2 * 3.142) / 60

ω = 7540.8 / 60

ω = 125.68 rad/s

Substituting the values into the formula

V(max) = NBAω

V(max) = 80 * 0.30 * 0.0096 * 125.68

V(max) = 80 * 0.362

V(max) = 28.96 V

Therefore, the maximum output voltage of the generator would be 28.96 V

5 0

3 years ago