According to Newton's first law, an object at rest will ____

A charged particle moving along the +x-axis enters a uniform magnetic field pointing along the +z-axis. A uniform electric field

Brums [2.3K]

Answer:

the electric field direction should be in positive y axis

Explanation:

Lets assume that charge on particle is positive and it isequal to +q

First calculate the magnetic force on it

$F_B = q V\times B =qVBsin\theta$

for direction

use Right Hand Rule which will give the direction and by using his the direction will come towards negative y axis.

As given in the question that charge particle does not change their velocity so we need to apply electric field in such a way that electric force direction should be opposite to the magnectic field.

and magnitude should be same as magnectic force and also direcion of electric force depend on the direction of elecric field when charge is positive because electric force $F_E = qE$

Hence the electric field direction should be in positive y axis

3 0

4 years ago

A 0.50-kilogram frog is at rest on the bank surrounding a pond of water. As the frog leaps from the bank, the magnitude of the a

marysya [2.9K]

Complete question:

A 0.50 kilogram frog is at rest on the bank surrounding a pond of water. As the frog leaps from the bank, the magnitude of the acceleration of the frog is 4.0 meters per second^2. Calculate The magnitude of the net force exerted on the frog as it leaps.

Answer:

2.0N

Explanation:

Given that,

Mass, m of the frog = 0.5 kg

The acceleration of the frog = 4.0 m/s².

We have been asked To find,

The magnitude of the net force exerted on the frog as it leaps.

So

We calculate this using the formula below :

F = ma

When we insert the values into the formula, we have:

F = 0.5 kg × 4 m/s²

F = 2.0 N

Therefore, the magnitude of net force is 2.0 N.

5 0

3 years ago

A 42.2 N force acts at 40* to the ground, causing the object to move a horizontal distance of 8.15 m. How much work was done on

slavikrds [6]

Answer:

W=F.dcos angle

w=42.2 x8.15 x cos40

w=343.93× cos 40

W=343.93 x 0.76

W=261.38 J

7 0

3 years ago

The colors of the stars in the sky range from red to blue. Assuming that the color indicates the frequency at which the star rad

Crazy boy [7]

Answer:

a) 4458K b) 5048K, c) 6166K, d) 5573K

Explanation:

The temperature of the stars and many very hot objects can be estimated using the Wien displacement law

$\lambda_{max}$ T = 2,898 10⁻³ [m K]

T = 2,898 10⁻³ / $\lambda_{max}$

a) indicate that the wavelength is

Lam = 650 nm (1 m / 109 nm) = 650 10⁻⁹ m

Lam = 6.50 10⁻⁷ m

T = 2,898 10⁻³ / 6.50 10⁻⁷

T = 4,458 10³ K

T = 4458K

b) lam = 570 nm = 5.70 10⁻⁷ m

T = 2,898 10⁻³ / 5.70 10⁻⁷

T = 5084K

c) lam = 470 nm = 4.70 10⁻⁷ m

T = 2,898 10⁻³ / 4.7 10⁻⁷

T = 6166K

d) lam = 520 nm = 5.20 10⁻⁷ m

T = 2,898 10⁻³ / 5.20 10⁻⁷

T = 5573K

5 0

4 years ago

Read 2 more answers

An object's inertia causes it to come to a rest position.

stellarik [79]

Answer:

no

Explanation:

the inertia of an object does not make it to come to rest, this is normally caused by friction

3 0

3 years ago

According to Newton's first law, an object at rest will _____.