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Marta_Voda [28]
3 years ago
12

X-ray waves are low energy waves. True or False

Physics
1 answer:
Marat540 [252]3 years ago
7 0

Depends on your personal frame of reference.

Compared to gamma rays -- True

Compared to radio waves -- False

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Someone please help me! And I will mark you as brainlist!!
Ronch [10]

Answer:

1. G.P.E = 24 J

2. center of mass

Explanation:

Given the following data;

Mass = 2kg

Height, h = 1.2m

Acceleration due to gravity = 9.8 N/kg or m/s².

To find the gravitational potential energy;

Gravitational potential energy (GPE) is an energy possessed by an object or body due to its position above the earth.

Mathematically, gravitational potential energy is given by the formula;

G.P.E = mgh

Where;

  • G.P.E represents potential energy measured in Joules.
  • m represents the mass of an object.
  • g represents acceleration due to gravity measured in meters per seconds square.
  • h represents the height measured in meters.

Substituting into the formula, we have;

G.P.E = 2*1.2*9.8

G.P.E = 23.52 to 2 S.F = 24 Joules.

Translation kinetic energy is defined as the energy of a system due to the motion of the system’s center of mass. The center of mass is typically where the mass of the object or particle is concentrated.

6 0
3 years ago
The strength of the electric field at a certain distance from a point charge is represented by E. What is the strength of the el
Nana76 [90]

Answer:

E

Explanation:

Using Coulomb's law equation

Force of the charge = k qQ /d²

and E = F/ q

substitute for F

E = ( K Qq/ d² ) / q

q cancel q

E = KQ / d²

so twice  the distance of the from the point charge will lead to the E ( electric field ) decrease by a 4 = E/4. E is inversely proportional to d²

7 0
3 years ago
Standing still, Bruce, the quarterback, gets tackled by Biff, the 90.0-kg tackle, who is traveling at 7.0 m/s. Upon collision, B
Doss [256]

\\ \sf\longmapsto \Delta P=P

\\ \sf\longmapsto m1v1=m2v2

\\ \sf\longmapsto 90(7)=m2(10)

\\ \sf\longmapsto 10m2=630

\\ \sf\longmapsto m2=\dfrac{630}{10}

\\ \sf\longmapsto m2=63kg

Bruces mass is 63kg

5 0
3 years ago
Read 2 more answers
Why do you think plants surround the seeds with a yummy fruit?
beks73 [17]

Answer:Cross-pollination is two plants that work together to pollinate and self-pollinate is when a flower pollinates itself. ... Why do you think plants surround the seeds with a yummy fruit? To protect the seeds so that they can reproduce. How is cross-pollination different from self-pollination?

Explanation:

4 0
3 years ago
. A block of mass 4.0 kg on a spring has displacement as a function of time given by, x (t) = (1.0 cm) cos [(2.0 rad/s) t + 0.25
svlad2 [7]

Answer and Explanation:

1. Evaluate the function x(t) at t=0.5

x(t)=1cos(2t+0.25)\\x(0.5)=cos(2*0.5+0.25)=cos(1+0.25)=cos(1.25)=0.3153223624\approx0.31cm

2. The period of motion T can be calculated as:

T=\frac{2\pi}{\omega}

Where:

\omega=2rad/s

So:

T=\frac{2\pi}{2}=\pi\approx3.14s

3. The angular frequency can be expressed as:

\omega=\sqrt{\frac{k}{m} }

Solving for k:

k=(\omega)^2*m=(2)^2*4=4*4=16\frac{N}{m}

4. Find the derivate of x(t):

\frac{dx}{dt} =v(t)=-2sin(2t+0.25)

Now, the sine function reach its maximum value at π/2 so:

2t+025=\frac{\pi}{2}

Solving for t:

t=\frac{\frac{\pi}{2} -0.25}{2} =0.6603981634s

Evaluating v(t) for 0.6603981634:

v(0.6603981634)=-2sin(2*0.6603981634+0.25)=-2sin(\frac{\pi}{2} )=-2*1=2

So the maximum speed of the block is:

v(0.6603981634)=2cm/s=0.02m/s

In the negative direction of x-axis

5. The force is given by:

F=kx

The cosine function reach its maximum value at 2π so:

2t+0.25=2\pi

Solving for t:

t=\frac{2\pi-0.25}{2} =3.016592654s

Evaluating x(t) for 3.016592654:

x(3.016592654)=cos(2*3.016592654+0.25)=cos(2\pi)=1cm=0.01m

Therefore the the maximum force on the block is:

F=16*0.01=0.16N

6 0
3 years ago
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