Light hits a mirror at a 45Â° angle. It will be reflected at an angle ____

If you weigh 690 N on the earth, what would be your weight on the surface of a neutron star that has the same mass as our sun an

lana [24]

Answer:

Explanation:

Given that,

Mass of star M(star) = 1.99×10^30kg

Gravitational constant G

G = 6.67×10^−11 N⋅m²/kg²

Diameter d = 25km

d = 25,000m

R = d/2 = 25,000/2

R = 12,500m

Weight w = 690N

Then, the person mass which is constant can be determined using

W =mg

m = W/g

m = 690/9.81

m = 70.34kg

The acceleration due to gravity on the surface of the neutron star is can be determined using

g(star) = GM(star)/R²

g(star) = 6.67×10^-11 × 1.99×10^30 / 12500²

g (star) = 8.49 × 10¹¹ m/s²

Then, the person weight on neutron star is

W = mg

Mass is constant, m = 70.34kg

W = 70.34 × 8.49 × 10¹¹

W = 5.98 × 10¹³ N

The weight of the person on neutron star is 5.98 × 10¹³ N

5 0

3 years ago

What generalization can be made about energy?

HACTEHA [7]

Well, energy can be produced from the burning of fossil fuels which produce steam to spin turbines which generates electricity. But fossil fuels like coal and oil are no renewable.
Some renewable ways to get energy is water where they separate hydrogen from h2o because hydrogen can be made into energy. Also nuclear fission is another way to get energy. That's when in a nuclear power plant, the atoms nucleus is split which sends a large amount of energy.
Wind energy is another source of energy, which is from windmills. Another renewable energy source is solar energy. That's when u use solar cells, like some houses and calculators have, which generates a lot of energy, but only in the day since the sun doesn't shine in the nigh.

Hope I helped!!!

6 0

2 years ago

Read 2 more answers

The box of a well-known breakfast cereal states that one ounce of the cereal contains 113 Calories (1 food Calorie = 4186 J). If

mafiozo [28]

Answer:

$m=454.73 kg$

Explanation:

To convert the energy of the cereal to know the weight:

$m*g*h=Q'$

$Cal=0.0179*113 Cal=2.0227Cal$

$Q'=2.0227Cal*\frac{4186J}{1Cal}$

$m*g*h=8467.02J$

$m*g=\frac{Q'}{h}=\frac{8467.02J}{1.90m}$

$m*g=4456.33 N$

Supuse the gravity as a g=9.8m/s^2

$m=\frac{4456.33N}{9.8m/s^2}$

$m=454.73 kg$

3 0

3 years ago

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If a friend is making lemonade from an instant mix, which set of conditions would lead to a faster rate of dissolving the mix in

Wittaler [7]

Answer:

C: Warm water and Powdered Lemonade.

Explanation:

I got it right first try trust me, It is the right answer.

3 0

2 years ago

Read 2 more answers

Help with these below and the above. I will give brainliest and 20 points!

Juli2301 [7.4K]

#1

height from which it is dropped is 64.8 m

time taken to fall the object is

$h = v_y * t + 0.5 gt^2$

$64.8 = 0 + 0.5 * 9.8 * t^2$

$t = 3.64 s$

so it will take 3.64 s to drop

#2

Since the package is dropped from plane so the package and plane both will have same speed in horizontal direction so with respect to plane the package will always remain in same horizontal position.

Now here since the package is also moving downwards due to free fall so it will always seen as dropped down while we are watching it from the plane

The package appears to fall straight downward.

#3

Let the time trianglet is "t"

now in this interval of time if it falls down by 4 cm

$h = v_y *t + 0.5 gt^2$

$4 = 0 + 0.5* 9.8 * t^2$

$t^2 = \frac{4}{4.9}$

now in same time it covers horizontal distance

$d = v_x * t$

$4 = \sqrt{\frac{4}{4.9}} * v_x$

$v_x = 4.43 m/s$

now after two trianglet the horizontal position will be

$x = v_x * t$

$x = 4.43 * 2*\sqrt{\frac{4}{4.9}}$

$x = 8 cm$

$y = v_y * t + 0.5 g t^2$

$y = 0 + 0.5 * 9.8 * 4 * \frac{4}{4.9} = 16 cm$

so it is 8 cm to the right and 16 cm below

#3

Speed horizontal = 42 m/s

distance covered = 60 ft 6 inch

$d = 60.5 * 0.3048 = 18.44$

time taken to cover the distance

$x = v* t$

$18.44 = 42 * t$

$t = 0.44 s$

now the distance by which it is dropped

$y = \frac{1}{2}gt^2$

$y = 0.5 *9.8*0.44^2 = 0.944 m$

#4

here the velocity of projectile will increase when it will fall under gravity

So here it we can see initially it is moving up against the gravity so its speed will increase but after that its speed will increase when it starts falling down

So the correct answer is Between B to C

#5

when x coordinate is 1000

time taken to reach that point will be

$x = v_x * t$

$1000 = 50 * t$