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3 years ago

(a) Find the acceleration of B.(b) Find the tensions, T1 and T2, in the strings.

Physics

1 answer:

Ann [662]3 years ago

6 0

i believ that the answer would be

the acceleration of B is 0.2

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What is the speed of a commercial jet which travels form New York to Los Angeles (4800) in 6 hours

Colt1911 [192]

Answer:

$Speed = 800km}/hr$

Explanation:

Given

$Distance = 4800km$

$Time = 6hr$

Required

Determine the speed of the jet

The speed is calculated as:

$Speed = \frac{Distance}{Time}$

Substitute 4800 km for Distance and 6hr for Time

$Speed = \frac{4800km}{6hr}$

$Speed = 800km}/hr$

<em>Hence, the speed of the commercial jet is 800km/hr</em>

8 0

2 years ago

Find the ratio of the gravitational force between two planets if the masses of both planets are quadrupled but the distance betw

Snezhnost [94]

Answer:

The ratio of the new force over the original force is 16

Explanation:

Recall the formula for the gravitational force between two masses M1 and M2 separated a distance D:

$F_G=G\,\frac{M_1\,\,M_2}{D^2}$

So now, if the masses M1 and M2 are quadrupled and the distance stays the same, the new force becomes:

$F'_G=G\,\frac{4M_1\,\,4M_2}{D^2}=G\,\frac{16\,\,M_1\,\,M_2}{D^2}=16\,\,G\,\frac{M_1\,\,M_2}{D^2}= 16\,\,F_G$

which is 16 times the original force.

So the ratio of the new force over the original force is 16

5 0

2 years ago

A block of mass m is compressed against a spring (spring constant kk) on a horizontal frictionless surface. The block is then re

Nimfa-mama [501]

Answer:

A) True, B) False, C) False and D) false

Explanation:

Let's solve the problem using the law of conservation of energy to know if the statements are true or false

Let's look for mechanical energy

Initial

Emo = Ke = ½ k Dx2

Final

Em1= ½ m v12

Emo = Em1

½ k Δx2 = ½ m v₁²

v₁² = k / m Δx²

v₁ = √ k/m Δx

Now let's calculate the speed when it falls

Vfy² = Voy² - 2gy

Vfy² = - 2gy

Vf² = v₁² + vfy²

A) True v₁ = A Δx

.B) False. As there is no rubbing the mechanical energy conserves

.C) False the velocity is proportional to the square root of the height

v2y = v2 √2

. D) false promotional compression speed

3 0

3 years ago

After an afternoon party, a small cooler full of ice is dumped onto the hot ground and melts. If the cooler contained 5.50 kg of

zysi [14]

Answer:

$Q = 4.40 \times 10^5 Cal$

Explanation:

Here we know that initial temperature of ice is given as

$T = 0^o C$

now the latent heat of ice is given as

$L = 80 Cal/g$

now we also know that the mass of ice is

$m = 5.50 kg$

so here we know that heat required to change the phase of the ice is given as

$Q = mL$

$Q = (5.50 \times 10^3)(80)$

$Q = 4.40 \times 10^5 Cal$

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3 years ago

The sun has a large negative apparent magnitude and a positive absolute magnitude. What does this mean?

erma4kov [3.2K]

The apparent magnitude<span> (m) of a celestial object is a number that is a measure of its brightness as seen by an observer on Earth. The brighter an object appears, the lower its magnitude value.</span>

5 0

2 years ago