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3 years ago

An object has a velocity of 8 m/s and a kinetic energy of 480 J. What is the mass of the object? (Formula: ) KE=1/2mv squared

Physics

1 answer:

Julli [10]3 years ago

5 0

Answer:15kg

Explanation:

kinetic energy=ke=480J

Velocity=v=8m/s

Mass=m

Ke=0.5 x m x v x v

480=0.5 x m x 8 x 8

480=32m

Divide both sides by 32

480/32=32m/32

15=m

Mass=15kg

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Measuring the size of a specific object might include which of these SI units?

defon

D. Meter, Kilogram

Explanation:

There are certain units for the measurements things which are around us.
This is the SI units for the measurement of the size of the objects.
SI units are international unit systems, they are one who accepted around the world.
It is called the International System of Units, used to expresses the phenomenon happens around us in a scientific method
Here, the meter is the unit for Length in the International System of Units and Kilogram is to represent the mass of the object in SI units system.

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4 years ago

A solid sphere of radius R carries a fixed, uniformly distributed charge q. Obtain an expression for the magnitude of the electr

NISA [10]

Answer:

The electric field outside the sphere will be $\dfrac{qr}{4\pi\epsilon_{0}R^3}$ .

Explanation:

Given that,

Radius of solid sphere = R

Charge = q

According to figure,

Suppose r is the distance between the point P and center of sphere.

If $\rho$ be the volume charge density,

Then, the charge will be,

$q=\rho\times\dfrac{4}{3}\pi R^3$ .....(I)

Consider a Gaussian surface of radius r.

We need to calculate the electric field outside the sphere

Using formula of electric field

$\oint{\vec{E}\cdot \vec{dA}}=\dfrac{Q}{\epsilon_{0}}$

$E\times4\pi r^2=\dfrac{\rho\dotc \dfrac{4}{3}\pi r^3}{\epsilon_{0}}$

Put the value from equation (I)

$E\times4\pi r^2=\dfrac{qr^3}{\epsilon_{0}R^3}$

$E=\dfrac{qr}{4\pi\epsilon_{0}R^3}$

Hence, The electric field outside the sphere will be $\dfrac{qr}{4\pi\epsilon_{0}R^3}$ .

4 0

3 years ago

At what latitudd is the coriolis effect the smallest

alexandr1967 [171]

The Coriolis effect is strongest at the north and south poles, and zero on the equator (zero latitude).

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4 years ago

The parking brake on a 1000 kg Cadillac has failed, and it is rolling slowly, at 1 mph , toward a group of small children. Seein

GalinKa [24]

Um of momenta = 0( Since both the cars stop)
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then, v1=speed of cadillac and v2=speed of volkswagen. 
Therefore, (m1)*(v1) + (m2)*(v2) = 0 
Substituting, 
(1000*4) + (2000*v2) = 0 
4000 = - 2000 v2 
Therefore, v2= - 2 m/s.

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3 years ago

a 250.0 g snowball of radius 4.00 cm starts from rest at the top of the peak of a roof and rolls down a section angled at 30.0 d

g100num [7]

Answer:

The response to this question is as follows:

Explanation:

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3 years ago