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3 years ago

What is the main function of a telescope?

Physics

2 answers:

OLga [1]3 years ago

6 0

Telescope magnifies light coming from distant objects.

Alla [95]3 years ago

6 0

Answer:

It magnifies light received from distant objects.

Explanation:

Telescope is an arrangement of lenses and mirrors which enable us to see us the objects which are far away from us. This happens as the telescope magnifies the objects. It uses a convex lens or concave mirror to collect the light and magnify it. Convex lens and concave mirror are used to see things magnified.

In telescope, either two convex lenses of different focal length or a concave mirror and a convex lens of different focal length are used for magnifying.

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A force of only 150 N can lift a 600 N sack of flour to a height of 0.50 m when using a lever as shown in the diagram below. a.

Snowcat [4.5K]

Actually the question is not clear. The Benefit of lifting using lever is that you can apply force in a convenient direction and you can use very less force to lift object by balancing the torque due to object.For example you want to lift a mass of 4N with a force 2N you can use a class 2 lever and maintain the ratio between the distances of the body and the point of application of force from the fulcrum to be 1:2.In any case balance the torque to get the required force.

8 0

3 years ago

A ball is projected horizontally from a table 1.0 m high and hits the ground after falling from a time t=0.45s. If the ball trav

photoshop1234 [79]

The initial velocity is $6.7 m/s$

Explanation:

The motion of the ball is a projectile motion, therefore it consists of two independent motions:

- A uniform motion (constant velocity) along the horizontal direction

- A uniformly accelerated motion, with constant acceleration (acceleration of gravity) in the downward direction

In this problem, we just need to analyze the horizontal motion: the horizontal velocity is constant, therefore the horizontal distance travelled is given by

$x=v_x t$

where

$v_x$ is the horizontal velocity

t is the time of flight

Here we have:

t = 0.45 s

x = 3.0 m

And so solving for $v_x$ , we find

$v_x = \frac{3.0}{0.45}=6.7 m/s$

And since the ball was initially projected horizontally, this is also the initial velocity.

Learn more about projectile motion:

brainly.com/question/8751410

#LearnwithBrainly

3 0

3 years ago

Dump Tower is 96 stories tall. A small, 1.2-kg object is dropped over the side of the roof of the tower and accelerates toward t

laiz [17]

Answer:

6.0 s

98 m/s

Explanation:

The radius of the planet is much bigger than the height of the tower, so we will assume the acceleration is constant. Neglect air resistance.

Acceleration due to gravity on this planet is:

a = GM / r²

a = (6.67×10⁻¹¹ m³/kg/s²) (2.7 × 1.48×10²³ kg) / (1.7 × 750,000 m)²

a = 16.4 m/s²

The height of the tower is:

Δy = 96 × 3.05 m

Δy = 293 m

Given v₀ = 0 m/s, find t and v.

Δy = v₀ t + ½ at²

(293 m) = (0 m/s) t + ½ (16.4 m/s²) t²

t = 6.0 s

v² = v₀² + 2aΔy

v² = (0 m/s)² + 2 (16.4 m/s²) (293 m)

v = 98 m/s

8 0

4 years ago

un cubo que mide 5 in por lado. ¿cual es el volumen del cubo en unidades del SI y en unidades del SUEU

Pavel [41]

Answer:

125 in^3

Explanation:

Volumen de un cubo = lado ^ 3

Lado = 5

Volumen = 5 ^ 3

$5^3 = 5\times 5\times 5\\\\= 125 in^3$

8 0

3 years ago

17. If ice has a density of 0.92g/cm?, what is the mass of a 30 cm block?<br> I

arsen [322]

Answer:

Mass = 27.6 grams

Explanation:

Given the following data;

Density of ice = 0.92g/cm³

Volume = 30cm³

To find mass of ice;

Density can be defined as mass all over the volume of an object.

Simply stated, density is mass per unit volume of an object.

Mathematically, density is given by the equation;

$Density = \frac{mass}{volume}$

Making mass the subject of formula, we have;

$Mass = density * volume$

$Mass = 0.92 * 30$

Mass = 27.6 grams

Therefore, the mass of ice is 27.6 grams.

3 0

3 years ago