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4 years ago

A satellite is always being pulled by gravity.truefalse

Physics

1 answer:

Lynna [10]4 years ago

6 0

Yes, that is true. <span>A satellite is always being pulled by gravity.</span>

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An electron moves north at a velocity of 4.5 × 104 m/s and has a magnetic force of 7.2 × 10-18 n exerted on it. if the magnetic

Mice21 [21]

The magnetic force on a moving charge is given by:

$F=qvB \sin \theta$

where q is the charge, v is the speed of the charge, B is the magnetic field intensity and $\theta$ is the angle between the directions of B and v.

In our problem, the charge is an electron ( $q=1.6 \cdot 10^{-19}C$ ), the velocity of the charge is $v=4.5 \cdot 10^4 m/s$ , the magnetic force is $F=7.2 \cdot 10^{-18} N$ and the angle between the direction of v and B is $\theta=90^{\circ}$ , so $\sin \theta=1$ and we can ignore the sine in the formula. Therefore, if we rearrange the equation and we put these numbers in, we can find the intensity of the magnetic field:

$B=\frac{F}{qv}=\frac{7.2 \cdot 10^{-18} N}{(1.6 \cdot 10^{-19}C)(4.5 \cdot 10^{-4} m/s)}=0.001 T$

8 0

4 years ago

PLEASEE GUYS HELP I BEG YOU

raketka [301]

0.520155077123917 i believe?? hope this helps

7 0

3 years ago

The Cassegrain design provides more compact (shorter) telescopes. Why? (Examine figures 2.4.2 and 2.4.3). The shorter design is

Ipatiy [6.2K]

Answer:

Because the light reflects multiple times until it gets to the Cassegrain focus.

Explanation:

The Cassegrain design can be seen in a reflecting telescope. In this type of design the light is collected by a concave mirror, and then intercepted by a secondary convex mirror, and sends it down to a central opening in the primary mirror (concave mirror), in which a detector is placed (Cassegrain focus)

Since, the light is reflected many times due to Cassegrain design, that leads to shorter telescopes.

5 0

3 years ago

To move a suitcase up to the check-in stand at the airport a student pushes with a horizontal force through a distance of 0.95 m

solmaris [256]

Answer:

33.68 N

Explanation:

Data

W= 32J

d- 0.95m

F= ?

W=Fd

They are asking for the magnitude which is the force, so you need to solve for force.

F=W/d

= 32J/ 0.95m

= 33.68 N

6 0

3 years ago

A star may form a black hole once it cannot ?

IceJOKER [234]

A star may form a black hole once is true. After the marked supernova explosion, the star shrinks because it sheds away the gaseous layers of the star. And especially if the star is large, it will form into a black hole.

4 0

3 years ago