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A raft is constructed of woodhaving a density of 626.2kg/m3. The surface area of the bottom of the raft is6.3 m2, and the volume of the raft is 0.601 m3. When theraft is placed in fresh water having a density of1.0 x 103 kg/m3, how deep is the bottom of the raft below water level in units of m?
A 35kg child slides down a playground slide at aconstant speed, The slide has a height of 4.0mand is 7.4m long, find the magnitude of the kinetic friction force acting on the child
t the vertices of a square are located four identical positive point charges. what is the charge on one of the positive point charges
The electrical field within a continuous distribution of charge is given by the equation E= cxi+cyj+czk, Write the equation for E in terms of the position vector r
A unifrom solid disk is rolliong on a level surface with a speed of 45.0 m/s. How far along the incline will the disk roll
A picture is supported by two cords each making an angle of 53degree with the horizontal. If the tension in each cord is 10N what is the weight of the picture
If a electron after being accelerated by a potential difference of 100 V enters in a uniform magnetc field of 1T perpendicular. Calculate its radius of circular path described by it
A function generator generates a periodic ”square wave” signal. One period of such
An infinitely long, charged, thin-walled cylinder has a radius, R, of 3.0 cm. The charge per unit length is 5.40 10-9 C/m on the shell. What is the magnitude of the electric Field at radial distance r= (R/2.1) cm from central axis?
A 0.03 kg (lead) bullethits a steel plate and melts and splatters on impact. Assuming that the bullet recieves 80% of the collision energy, at what minimium speed must it travel to melt on impact? How is this soved without knowing what the bullet is ..
Suppose you have a spherical balloon filled with air at room temperature and 1.0 atm pressure; its radius is 11 cm. what's the balloon's new radius
A particle with a charge of q = -5.60 nC is moving in a uniform magnetic field of B= (-1.23 T) z. Calculate the x component of the velocity of the particle
An electron in an excited state of hydrogen makes a transition from n = 7 level to the n = 2 level. Calculate the wavelength of the photon involved in the transition
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