How many electrons can a nucleas hold

A ball is thrown with a velocity of 40 m/s at an angle of 30° above the horizontal and attains a certain range R. At what other

choli [55]

Answer:

This ball will attain the same range at 60°.

Explanation:

Projectile motion: when an object is thrown in such a way that it form an angle with horizon, the force act on it that is the acceleration due gravity. This type of motion is known as projectile motion.

Range: The horizontal distance is covered by an object.

Range $=\frac{u^2 sin2\theta}{g}$

u = initial velocity = 40 m/s

θ = 30°

g = gravity =9.8 m/s²

$Range=\frac{40^2\times sin(2\times 30^\circ)}{9.8}$

$=\frac{800\sqrt{3} }{9.8}$

Next,

Range $=\frac{800\sqrt{3} }{9.8}$ and u = 40 m/s

$sin2\theta =\frac{Range \times g}{u^2}$

$\Rightarrow sin2\theta =\frac{\frac{800\sqrt{3} }{9.8} \times 9.8}{40^2}$

$\Rightarrow sin 2\theta =\frac{\sqrt{3} }{2}$

$\Rightarrow sin 2\theta = sin 120^\circ$

$\Rightarrow \theta =120^\circ$

$\Rightarrow \theta =60^\circ$

This ball will attain the same range at 60°.

3 0

3 years ago

what is the mass of a pure platinum disk with a volume of 113 cm3? the density of platinum is 21.4 g/cm3

Oduvanchick [21]

V=m×d
m=v/d
m=113/21.4
m=5.28g

6 0

4 years ago

Read 2 more answers

What had to be invented before we could discover Saturn and Neptune?

Ann [662]

The discovery of Uranus, Neptune, most asteroids, the moons of
any planet other than Earth, Pluto, and all the other dwarf planets,
required the invention and use of telescopes. Those objects are all
too dim to be seen with a bare naked human eye.

Saturn is bright and plainly visible with your eyes, if you know when
and where to look, and what you're looking at.

4 0

3 years ago

Read 2 more answers

An object is placed 10 cm from a convex lens of focal length 20 cm. What is the lateral magnification of the object?.

Airida [17]

Answer:Solution

verified

Verified by Toppr

Given:u=−10cm f=20cm (convex lens)

To find: v and image's nature.

Solution: From lens formula

v

1

−

u

1

=

f

1

v

1

+

10

1

=

20

1

Explanation:

7 0

2 years ago

7. What is the acceleration of the box?<br> a. 2.5 m/s2<br> b. 4 m/s2<br> c. 6 m/s2<br> d. 10 m/s2

faust18 [17]

This is your answer
b) 4m/s2
Here’s my work

6 0

3 years ago